Love to see you putting hands on pedigree equipment. I have lot of respect for LINN, I had their "INTEK" in eightees which was less expensive without compromising sound quality. Fantastic company in Scotland with limited number of crew. Lots of regards.
Zafar Iqbal Yes they make some great gear that costs a pretty penny. Good engineering goes into these pieces. Notice the black protector I had down. It came wrapped in this, in prestine condition. It goes home in the exact same condition it arried in. I enjoy working on these really high end pieces as the owner never bays an eye at the bill and when I called the owner of this and told him the price, his response was way too low. He said we will talk when he picks it up next week which likely means a nice bonus for me. The owner of this unit bought it in Scotland when he was back there visiting family.
12voltvids I always love to hear from you and appreciate your skills. You may agree that the taste of our new generation has changed. Old music and classics are still alive people still enjoy them whereas new songs have only last for a week (if they're lucky). Likewise, number of people are getting thinner & thinner every day who appreciate and honour quality stuff. Lots of regards.
12voltvids LINN people are very caring and keep in contact with their customers. When I opened the box, I found a form which I filled and send it back to them. They used to send me their Newsletter namely "RECORD". Every technician & worker is an audiophile even the turner who make Platter for their turntable. He makes every Platter assuming that he is making it for himself. In those days their pre & power LK1, LK2 were out of my pocket so I chose INTEK. Beauty of sound is that it doesn't give you listening fatigue. It would not be out of place to mention here that I waited 3 or 4 days in London for its arrival from Scotland. Later on the way back the Box was mishandled by the airline, it went back to London and came again after couple of days. It's always an honor for me to hear from you. Lots of regard.
12voltvids Further, the retailer demonstrated LINN with one speaker. He said that the LINN has given such directions not to influence customer with two spakers demonstration. Love
Linn are renowned for their quality, and their units command a high price - here in the UK, for a used DS1 - around 1000GBP. Refreshing to see that is was just a low-end cap gone bad that was the only issue. The owner will have felt like he lost an arm handing it over to you, but now you stitched it right back on. Good job there.
Linn call that amplifier technology Chakra, they first implemented it in the Klimax Twin power amp (which cost about £7000). It really sounds good, it’s reliable and they’ve trickled it down to their “affordable” models over the years.
That is (was) pretty much Linn's entry level product. I could tell as soon as you looked at the board it did not come from the factory like that. Good job sir!
Jérémie Faucher-Goulet Amateurs go in and shotgun all the electrolytic caps. Those with experience trust their test equipment and knowledge of general circuit design to know which components are the likely failure and will replace only those parts as the other ones typically don't fail to the same degree and If 2 or 3 years down the road another one goes bad, this is a future oppertinity to make some more money. Loyal clients generally stay pretty loyal. When I left the business in 2003 a hand full of clients convinced me to service their equipment. Then they told their friends and now I have them as loyal clients too. I just got another one with this unit.
That was a great fun video to watch! One small point worth noting is that during the re-assembly, you accidentally installed the heat sink the wrong way around (easy to do). A few years back, during casual conversation with one of their electronics engineers (in a nice Glasgow pub) I asked why in the previous model of SMPS units (the original design found in products like their 5125 and 2250 AV amplifiers) they had used a U shaped heat sink (looking at its side profile) whereas the upgraded version of their SMPS that I had just fitted to my 2250 (named the 'Dynamik', which is of the same design series as the one in your video, and indeed was the type fitted to all MDSI units, from day 1 of manufacture) instead just had an L shaped profile of heat sink (thus offering poorer thermal performance due to its significantly smaller surface area than that of the previous model) and to my great surprise, I was informed that the removal of that vertical section was actually done for sound quality reasons (it's proximity to another component was found to be slightly degrading the sound quality) so there you go, one learns something new every day. I have no idea how detectable the change is - I've never tried reversing one to see if I can hear a difference - but it is worth mentioning for the benefit of anyone else who is performing a repair and refers to the end of your video to remind themselves how it went back together (instead, look at the start of the video to see how it was originally fitted; that is the officially correct orientation). :)
Actually I noticed that as I was reassembling it and rotated it after the shot was done but didn't bother redditing it. When it is on the wrong way other screws don't align right when putting the board back in. I left the shot in to see if someone caught it. Took awhile. I look in movies for continuity and prop bloopers myself. Was watching the movie operation avalanche, which is about the "faked" moon landing and there it was on the wall. A quartz wall clock. Problem was in 1967 there were no quartz wall clocks, they were electric or electronic balance wheel, so second hand would not be stepping in 1 second intervals. Good eye. Now go find the other bloopers in my videos. I put many in like running clips backwards showing something coming apart or going together because I didn't have the camera on or a shot was out of focus. I put them in to see if people are paying attention and that was why this shot was left in.
Re: 'When it is on the wrong way other screws don't align right when putting the board back in', Sir, you clearly need a far bigger hammer! :-) Actually, I did wonder if it was symmetrical, but that you had to change it answers the question. Interesting that you found suspicious looking joints; I actually found a dry one in another product (a Linn sub) but since that (and the MDSI) were made, Linn have moved to using a fancy new vapour phase soldering machine (it is actually very therapeutic to watch one of these units in action) so that should keep things nice and tidy in the soldering department. All the best B
@@briainwilson3708 The big indicator that the heat sink is on the wrong way is the heat sink strip that sticks out. That presses against the diode block. and it was sticking out when I got to putting it together. As you remember the video ends before the cover went on. When I went to put the cover on, that bit was sticking out and I looked it it and went hmmm, this looks wrong, and turned it around.
Hi, for those repairs, I often use LCR tweezers like the smart tweezer. You directly measure C value and the ESR of the cap inside of the PCB, without desoldering.. there is also a cheaper Mastech M8911 (approx 40eur or 40 us$) that can do this for low price. Works also for inductors.. The only thing is that caps should be discharged first to avoid damage of the lcr meter... best regards, Winfried
Those SMD cans are the nastiest thing ever invented. They have a very short life span as compared to a normal electrolytic capacitor. The worst thing about them is that they will leak an unbelievably corrosive substance that will destroy the components and PC traces of anything near them. I don't know if the latest version of these have been improved to correct this but the first generation of them are starting to fail at a high rate destroying many pieces of electronic equipment. ATB Doug.
My Linn Unidisk SC had the remote receiver out of order because of a small SMD electrolytic. Replaced it and now it has been fine for years. Linn of course couldn't care less, they don't even reply if you ask for support.
Yup. Im a big fan. Love the older LK stuff as well. They really shine when you drive the speakers with Active connections (no cross over dedicated active boards in many amps).
I discovered linn only a few yrs ago when I bought the 5.1 komponant speaker n sub..at a bargin price.. I've now after several yes bought the linn LK 100 amps.. x 3 active cards fitted tri amped tri wired in to linn ninka speakers with upgraded keystone bases.. Running a rega planner 2 upgraded rb300 arm ortofon 520.. Detail of sound blew absolutely me away.. Massive thumbs up to this guy and his vids.. Really enjoy his approach and outstanding knowledge to fixing all our beloved equipment... Love his vids.. Greetings from mallorca spain..
He will be one happy guy! They go for $3000! When I used to fit out the big mansions owned by footballers we only used Linn. I was fortunate to have done a course at their headquarters and see the factory. When set up right it sounds fantastic - but you pay for it! Oh yes; Tens of Thousands for a basic set up. It's very fulfilling watching you work, although this time I had a little brainfart: When you placed the probes I was looking at your Watch for the reading! Doh! Good job fella!
David Geltz It won't be back in a week. Esr on other 2 is fine. This one is the kicker cap that gets the oscilator running. Once it is running the cap isn't even needed. It just charges up on first power up to lick the oscilator.
Nice video as always. Did you rotate the heatsink back round the right way before sending it off? Doesn't look like the heat transfer pad was sitting on the transistor bodies.... Mind you, it's not much of a heatsink so it probably wasn't doing a lot anyway.
David Griffin Negative. Those are primary filters not the secondary ones that get the crap best out of them by the smps switching frequency. Those are dust caps on those and the vent isn't even on that side it is a pressure relief on the bottom. All those dust caps look like that because when they put the heat shrink wrapper on and shrink it it usually forms a slight dome on top as the dust cap gets squeezed.
Always found SMPS to be somewhat intimidating, but after seeing this and other successful repairs, I actually look forward to trying to fix one myself. Nice video, love your stuff.
Geir Endre Jenssen Smps were a mystery to me in the beginning. They can still be like wrestling a dragon at times as they run at pretty high voltages and can switch from a tame dragon to a fire and smoke breathing one in an instant.
The router at my company died after a power loss. The problem was a 22uF "bootstrap" capacitor used in the power supply Exactly as in this amplifier. It is simply there to provide brief surplus of power at startup to get the oscillator up and running. Once that oscillator is self sustaining, that capacitor is no longer needed.
I have seen a similar output topology. I think its very similar to Class G/H. I have seen it configured where the transistors actually are in series and act as regulators to the +/- rail voltage to the TDA7294 or whatever other IC they use, Those transistors will conduct more or less based on the input signal, basically allowing variable rail voltage to the IC reducing the heat output. And I have also seen it done another way where the output of the IC drives the transistors in a push-pull configuration to increase current gain or be able to reduce the minimum drive impedance. the TDA IC is a big op-amp after all. Same with the LM3886s.
Here is the site of the modern version: anatekinstruments.com/products/fully-assembled-anatek-blue-esr-meter-besr I ordered the kit version a few years ago after being introduced to it on this site and it works like a charm !
Did you had also an Linn CD player in your fingers? I got one from a friend of mine telling me that when he switches it off (no standby) and restarting it again the player has problems to play the CD (jumps). Do you thik this could also be a cap issue of the power supply? Cheers Andreas
StealthParrot to be fair, I’ve never seen one of these units fail before and I service Linn equipment. I repair a lot of Classiks, it’s always dead SMD caps in those.
Probably were quality brand name capacitors. As Si1938h mentioned, all the SMD electrolytic capacitors are pretty much garbage, regardless of brand. Whenever a board comes in with those, they are all replaced regardless what they test as they will all fail. We have been using the through hole version with the "leakless" solid electrolyte from Panasonic. Supposed to be the cure, but are expensive in comparison. They have amazingly low ESR like a ceramic or tantalum.... only time will tell how long they last though.
The Dollar Guy I use the plastic SMD base and thread quality through hole electrolytics through and then surface mount them, they will last years. Linn’s actual circuit designs are excellent. There’s little else I prefer, I’ve been using Linn equipment in my own system for about 18 years now.
tanterliser they’re about £3k now although they have HDMI inputs/outputs making them an extremely useful unit... and they do sound excellent, the streaming section is truly superb.
He mentioned that he believes they are used at low power output for class A output and then switches over to the discrete higher output class AB drivers. At low listening levels, class A (choice of most audiophiles) is ideal despite being very inefficient.
Hmmm, im not aware of any pure class A amps in the multiwatt package. im betting still on them being drivers for the descretes. could of course be wrong, but thats what alot of cheap AV receivers from the mid 2000's did. i used to have a Sony 6 channel amp, had 3 of those multiwatt's inside it.
Glad to see something modern that ain't made in the People's Republic of Cruelty. Isn't it amazing how when such a small component gets buggered it stops the whole unit?
Not really a drawback, I have Linn equipment as much as 25 years old, still working perfectly, still sounding superb. No scratchy pots or input selectors... and the real bonus is the level of control you have, most amps with a rotary pot are running at full steam before they reach 12 o’clock, Linn amps give you much finer adjustment at lower levels.
Smashing job, he will be happy as larry :-D And you won't rip him off like certain shops would :) An expensive looking device, from the uk it would be, tax is no fun here.
They do, but I will still take my full on tube amp driving my pair ot Technics SB700A speakers any day of the week and twice on Sunday. I have a very basic power amp, has 4 12au7 tubes driving 4 EL34 power tubes. 40 watts per channel, but man can it move some air in those speakers. Mind you they have 14" woofers, 5" midrange and dome tweets. Talk about sweet sound. I play my HD radio tuner through it all day and everyone that hears it cant believe the sound. The bass is clean, mid range powerful and highs clean. The strength to tube amps, and the British amps is the midrange. When you get the midrange right,everything just sounds wonderful.. Midrange is of course the most important part. The vocal range is where the ear is most sensitive, and if there is distortions in that range you are going to hear it.
....... Well done Mate, I find your productions very relaxing, I wish I could support you with a quid, but I'm just a 'battler'. P.S. discharge those large electrolytics, ( didn't see you ? )
When you quickly turn on and off the machine a few times, or after about an hour of operation, and then turn it on again, just like before you did, the relay will sound for a few seconds before it can be turned on. This fault occurs in the Linn power supply.@@12voltvids
gaelfrenchy I perfer a couple of tubes myself but then I am a tube head. Like this tubes have their own sound. One has to listen to one of these Linn amps to appreciate the sound as they do have a totally different sound. Very flat and transparent. Mid-range just flows out of the speakers and percussion instruments like Tom Tom's and bongo drums are sharp and crisp. It is really amazing how good this sounds without adding a bunch of colorization to the music.
Love to see you putting hands on pedigree equipment. I have lot of respect for LINN, I had their "INTEK" in eightees which was less expensive without compromising sound quality. Fantastic company in Scotland with limited number of crew. Lots of regards.
Zafar Iqbal
Yes they make some great gear that costs a pretty penny. Good engineering goes into these pieces. Notice the black protector I had down. It came wrapped in this, in prestine condition. It goes home in the exact same condition it arried in. I enjoy working on these really high end pieces as the owner never bays an eye at the bill and when I called the owner of this and told him the price, his response was way too low. He said we will talk when he picks it up next week which likely means a nice bonus for me. The owner of this unit bought it in Scotland when he was back there visiting family.
12voltvids
I always love to hear from you and appreciate your skills. You may agree that the taste of our new generation has changed. Old music and classics are still alive people still enjoy them whereas new songs have only last for a week (if they're lucky). Likewise, number of people are getting thinner & thinner every day who appreciate and honour quality stuff. Lots of regards.
Zafar Iqbal
I wish I could afford an amp like this. The sound off it was amazing
12voltvids
LINN people are very caring and keep in contact with their customers. When I opened the box, I found a form which I filled and send it back to them. They used to send me their Newsletter namely "RECORD". Every technician & worker is an audiophile even the turner who make Platter for their turntable. He makes every Platter assuming that he is making it for himself. In those days their pre & power LK1, LK2 were out of my pocket so I chose INTEK. Beauty of sound is that it doesn't give you listening fatigue.
It would not be out of place to mention here that I waited 3 or 4 days in London for its arrival from Scotland. Later on the way back the Box was mishandled by the airline, it went back to London and came again after couple of days.
It's always an honor for me to hear from you. Lots of regard.
12voltvids
Further, the retailer demonstrated LINN with one speaker. He said that the LINN has given such directions not to influence customer with two spakers demonstration. Love
You are a great tech and you have mad skills!
You crack me up with your blunt statements and never cease to amaze me.
Linn are renowned for their quality, and their units command a high price - here in the UK, for a used DS1 - around 1000GBP. Refreshing to see that is was just a low-end cap gone bad that was the only issue. The owner will have felt like he lost an arm handing it over to you, but now you stitched it right back on. Good job there.
Linn call that amplifier technology Chakra, they first implemented it in the Klimax Twin power amp (which cost about £7000). It really sounds good, it’s reliable and they’ve trickled it down to their “affordable” models over the years.
That is (was) pretty much Linn's entry level product. I could tell as soon as you looked at the board it did not come from the factory like that. Good job sir!
Positive thinking?? I call that experience!! The dead cap made a lot of sense to explain the fault and was quite probably the only issue.
Jérémie Faucher-Goulet
Amateurs go in and shotgun all the electrolytic caps. Those with experience trust their test equipment and knowledge of general circuit design to know which components are the likely failure and will replace only those parts as the other ones typically don't fail to the same degree and If 2 or 3 years down the road another one goes bad, this is a future oppertinity to make some more money. Loyal clients generally stay pretty loyal. When I left the business in 2003 a hand full of clients convinced me to service their equipment. Then they told their friends and now I have them as loyal clients too. I just got another one with this unit.
That was a great fun video to watch! One small point worth noting is that during the re-assembly, you accidentally installed the heat sink the wrong way around (easy to do). A few years back, during casual conversation with one of their electronics engineers (in a nice Glasgow pub) I asked why in the previous model of SMPS units (the original design found in products like their 5125 and 2250 AV amplifiers) they had used a U shaped heat sink (looking at its side profile) whereas the upgraded version of their SMPS that I had just fitted to my 2250 (named the 'Dynamik', which is of the same design series as the one in your video, and indeed was the type fitted to all MDSI units, from day 1 of manufacture) instead just had an L shaped profile of heat sink (thus offering poorer thermal performance due to its significantly smaller surface area than that of the previous model) and to my great surprise, I was informed that the removal of that vertical section was actually done for sound quality reasons (it's proximity to another component was found to be slightly degrading the sound quality) so there you go, one learns something new every day. I have no idea how detectable the change is - I've never tried reversing one to see if I can hear a difference - but it is worth mentioning for the benefit of anyone else who is performing a repair and refers to the end of your video to remind themselves how it went back together (instead, look at the start of the video to see how it was originally fitted; that is the officially correct orientation). :)
Actually I noticed that as I was reassembling it and rotated it after the shot was done but didn't bother redditing it. When it is on the wrong way other screws don't align right when putting the board back in. I left the shot in to see if someone caught it. Took awhile. I look in movies for continuity and prop bloopers myself. Was watching the movie operation avalanche, which is about the "faked" moon landing and there it was on the wall. A quartz wall clock. Problem was in 1967 there were no quartz wall clocks, they were electric or electronic balance wheel, so second hand would not be stepping in 1 second intervals. Good eye. Now go find the other bloopers in my videos. I put many in like running clips backwards showing something coming apart or going together because I didn't have the camera on or a shot was out of focus. I put them in to see if people are paying attention and that was why this shot was left in.
Re: 'When it is on the wrong way other screws don't align right when putting the board back in', Sir, you clearly need a far bigger hammer! :-) Actually, I did wonder if it was symmetrical, but that you had to change it answers the question.
Interesting that you found suspicious looking joints; I actually found a dry one in another product (a Linn sub) but since that (and the MDSI) were made, Linn have moved to using a fancy new vapour phase soldering machine (it is actually very therapeutic to watch one of these units in action) so that should keep things nice and tidy in the soldering department.
All the best
B
@@briainwilson3708 The big indicator that the heat sink is on the wrong way is the heat sink strip that sticks out. That presses against the diode block. and it was sticking out when I got to putting it together. As you remember the video ends before the cover went on. When I went to put the cover on, that bit was sticking out and I looked it it and went hmmm, this looks wrong, and turned it around.
Hi, for those repairs, I often use LCR tweezers like the smart tweezer. You directly measure C value and the ESR of the cap inside of the PCB, without desoldering.. there is also a cheaper Mastech M8911 (approx 40eur or 40 us$) that can do this for low price. Works also for inductors.. The only thing is that caps should be discharged first to avoid damage of the lcr meter... best regards, Winfried
Those SMD cans are the nastiest thing ever invented. They have a very short life span as compared to a normal electrolytic capacitor. The worst thing about them is that they will leak an unbelievably corrosive substance that will destroy the components and PC traces of anything near them. I don't know if the latest version of these have been improved to correct this but the first generation of them are starting to fail at a high rate destroying many pieces of electronic equipment. ATB Doug.
Doug McArtin Yes, they are garbage,my opinion of all surface mount.
Doug McArtin
You should see the ones from the 80 and 90s in video cameras. Boards shot from corrosive electrolytic
There are electrolytic polymer that exist now and I think theyx dont leak anymore but they are quite expensive
My Linn Unidisk SC had the remote receiver out of order because of a small SMD electrolytic. Replaced it and now it has been fine for years. Linn of course couldn't care less, they don't even reply if you ask for support.
Yup. Im a big fan. Love the older LK stuff as well. They really shine when you drive the speakers with Active connections (no cross over dedicated active boards in many amps).
I discovered linn only a few yrs ago when I bought the 5.1 komponant speaker n sub..at a bargin price..
I've now after several yes bought the linn LK 100 amps.. x 3 active cards fitted tri amped tri wired in to linn ninka speakers with upgraded keystone bases..
Running a rega planner 2 upgraded rb300 arm ortofon 520..
Detail of sound blew absolutely me away..
Massive thumbs up to this guy and his vids..
Really enjoy his approach and outstanding knowledge to fixing all our beloved equipment...
Love his vids..
Greetings from mallorca spain..
He will be one happy guy! They go for $3000! When I used to fit out the big mansions owned by footballers we only used Linn. I was fortunate to have done a course at their headquarters and see the factory. When set up right it sounds fantastic - but you pay for it! Oh yes; Tens of Thousands for a basic set up. It's very fulfilling watching you work, although this time I had a little brainfart: When you placed the probes I was looking at your Watch for the reading! Doh! Good job fella!
linn - very high-end hi-fi very nice but expensive kit
The "British" sound is one of smoothness and warmth.
Ray Murray
Yes it sounds fantastic even on these shitty speakers in the shop
Makes me think of that time the EU power grid ran slightly slow for a while, messing up timekeeping in the process for most Europeans.
I would have replaced the other two cap's just so it won't be returned in a week.
David Geltz
It won't be back in a week.
Esr on other 2 is fine.
This one is the kicker cap that gets the oscilator running. Once it is running the cap isn't even needed. It just charges up on first power up to lick the oscilator.
Nice video as always. Did you rotate the heatsink back round the right way before sending it off? Doesn't look like the heat transfer pad was sitting on the transistor bodies.... Mind you, it's not much of a heatsink so it probably wasn't doing a lot anyway.
Made by the legend that is Linn. That big filter cap you took out looked like it was starting to bulge, a warning sign maybe?
David Griffin
Negative. Those are primary filters not the secondary ones that get the crap best out of them by the smps switching frequency. Those are dust caps on those and the vent isn't even on that side it is a pressure relief on the bottom. All those dust caps look like that because when they put the heat shrink wrapper on and shrink it it usually forms a slight dome on top as the dust cap gets squeezed.
Interesting; thanks for the info.
Always found SMPS to be somewhat intimidating, but after seeing this and other successful repairs,
I actually look forward to trying to fix one myself.
Nice video, love your stuff.
Geir Endre Jenssen
Smps were a mystery to me in the beginning. They can still be like wrestling a dragon at times as they run at pretty high voltages and can switch from a tame dragon to a fire and smoke breathing one in an instant.
The router at my company died after a power loss. The problem was a 22uF "bootstrap" capacitor used in the power supply Exactly as in this amplifier. It is simply there to provide brief surplus of power at startup to get the oscillator up and running. Once that oscillator is self sustaining, that capacitor is no longer needed.
CORRECT!
I have seen a similar output topology. I think its very similar to Class G/H. I have seen it configured where the transistors actually are in series and act as regulators to the +/- rail voltage to the TDA7294 or whatever other IC they use, Those transistors will conduct more or less based on the input signal, basically allowing variable rail voltage to the IC reducing the heat output.
And I have also seen it done another way where the output of the IC drives the transistors in a push-pull configuration to increase current gain or be able to reduce the minimum drive impedance. the TDA IC is a big op-amp after all. Same with the LM3886s.
Nice job ! And a very helpful explanation about what makes that amp different !
8:58 the component ( looks like a diode ) next to the GND silkscreen word (just below the 16 pin IC ) has a crack on it
vk3hau
Just a bit of dust on it.
12voltvids
Ok, thanks for the reply.
hi can you tell me the valua of those caps looks like 22uF but not sure of the voltage and I take it -ve is the black stripe on top of the can.
Thanks
Nice repair video. I also like your esr meter. Where can i get one?
Here is the site of the modern version: anatekinstruments.com/products/fully-assembled-anatek-blue-esr-meter-besr
I ordered the kit version a few years ago after being introduced to it on this site and it works like a charm !
Did you had also an Linn CD player in your fingers? I got one from a friend of mine telling me that when he switches it off (no standby) and restarting it again the player has problems to play the CD (jumps). Do you thik this could also be a cap issue of the power supply? Cheers Andreas
No never worked on one. This is the only Linn piece I have worked on other than a turntable.
very informative video trouble shooting the power supply!
Michael Wong
Thanks. Owner of this unit gave me a huge tip for the repair.
LINN products are very expensive, you'd think they would use higher quality caps. I'm sure he will be ecstatic! Nicely done.
StealthParrot to be fair, I’ve never seen one of these units fail before and I service Linn equipment. I repair a lot of Classiks, it’s always dead SMD caps in those.
Probably were quality brand name capacitors. As Si1938h mentioned, all the SMD electrolytic capacitors are pretty much garbage, regardless of brand. Whenever a board comes in with those, they are all replaced regardless what they test as they will all fail. We have been using the through hole version with the "leakless" solid electrolyte from Panasonic. Supposed to be the cure, but are expensive in comparison. They have amazingly low ESR like a ceramic or tantalum.... only time will tell how long they last though.
That unit originally cost two thousand five hundred pounds Stirling.
The Dollar Guy I use the plastic SMD base and thread quality through hole electrolytics through and then surface mount them, they will last years. Linn’s actual circuit designs are excellent. There’s little else I prefer, I’ve been using Linn equipment in my own system for about 18 years now.
tanterliser they’re about £3k now although they have HDMI inputs/outputs making them an extremely useful unit... and they do sound excellent, the streaming section is truly superb.
How many watts per channel does that thing put out.
Jerry Spann
Rated 100 per channel and it will all day.
12voltvids Absolutely especially with that beefy switching power supply
Nice. do you have any idea about Radikal PSU?
Nope
Wonder what those multiwatt packages on the heatsink next to the outputs are? output driver ICs?
He mentioned that he believes they are used at low power output for class A output and then switches over to the discrete higher output class AB drivers. At low listening levels, class A (choice of most audiophiles) is ideal despite being very inefficient.
Hmmm, im not aware of any pure class A amps in the multiwatt package. im betting still on them being drivers for the descretes. could of course be wrong, but thats what alot of cheap AV receivers from the mid 2000's did. i used to have a Sony 6 channel amp, had 3 of those multiwatt's inside it.
Nice repair! Thanks a lot. It was a joy.
You have the most awesome projects ....
Glad to see something modern that ain't made in the People's Republic of Cruelty. Isn't it amazing how when such a small component gets buggered it stops the whole unit?
One big drawback to these units are push buttons for volume. otherwise excellent unit.
cosmolv
I am not a fan of push button volume either.
Not really a drawback, I have Linn equipment as much as 25 years old, still working perfectly, still sounding superb. No scratchy pots or input selectors... and the real bonus is the level of control you have, most amps with a rotary pot are running at full steam before they reach 12 o’clock, Linn amps give you much finer adjustment at lower levels.
I prefer rotary volume controls. Sliders are a close second .
100 watts per channel, pretty impressivr
Smashing job, he will be happy as larry :-D
And you won't rip him off like certain shops would :)
An expensive looking device, from the uk it would be, tax is no fun here.
zx8401ztv
When I quoted the repair he said no, that's not enough and gave me a very generous tip.
The UK makes some good stuff, looks like. The Scottish sure know their tech lol
They do, but I will still take my full on tube amp driving my pair ot Technics SB700A speakers any day of the week and twice on Sunday.
I have a very basic power amp, has 4 12au7 tubes driving 4 EL34 power tubes. 40 watts per channel, but man can it move some air in those speakers. Mind you they have 14" woofers, 5" midrange and dome tweets. Talk about sweet sound. I play my HD radio tuner through it all day and everyone that hears it cant believe the sound.
The bass is clean, mid range powerful and highs clean.
The strength to tube amps, and the British amps is the midrange. When you get the midrange right,everything just sounds wonderful..
Midrange is of course the most important part. The vocal range is where the ear is most sensitive, and if there is distortions in that range you are going to hear it.
Expect those other surface mount caps to go bad at some point.
A Floyd
All sme capacitors will eventually fail. The one that did is in a high stress area of the board that runs 24/7
....... Well done Mate, I find your productions very relaxing,
I wish I could support you with a quid, but I'm just a 'battler'.
P.S. discharge those large electrolytics, ( didn't see you ? )
Did it wear plaid? All kidding aside, another great video!!
It's called "Tartan" by the Scots folk :)
What song is that ?
What song is at around the 16 min mark?
That will require some research. It is a musicbakery royalty free track but the title slips my memory at the moment. I will get back to you.
Made In Scotland by Girders. 👍🏼
From …. not by .
craig staggs I stand corrected. 😉
Anytime my friend !!
Beautiful boards .
You pay $$$$$$$ for that.
This machine is actually not fixed properly, and the relay keeps ringing, which is another malfunction.
It's still running so obviously it is fixed.
When you quickly turn on and off the machine a few times, or after about an hour of operation, and then turn it on again, just like before you did, the relay will sound for a few seconds before it can be turned on. This fault occurs in the Linn power supply.@@12voltvids
@@00ii56 it belongs to a local so if there was a problem. It would have come back. This was years ago it was fixed.
Useful video
Yeah, the different sound is called "boring". Linn equipment is WAAAAYYYYYY overpriced for what you get. Nice fix though.
everything high end is overpriced for what you get
too damn complicate for listening music and switching power supply ......
gaelfrenchy
I perfer a couple of tubes myself but then I am a tube head. Like this tubes have their own sound. One has to listen to one of these Linn amps to appreciate the sound as they do have a totally different sound. Very flat and transparent. Mid-range just flows out of the speakers and percussion instruments like Tom Tom's and bongo drums are sharp and crisp. It is really amazing how good this sounds without adding a bunch of colorization to the music.
@@12voltvids The Scottish sure know how to make audio equipment, seemingly.
👍
Thumbs up! :D
Nice!!
I bet it kilt you to work on it
YUKI JINJUJI
How did you know I put a kilt on to fix this.
@@12voltvids How would we know if you did or not? There's no shots of you working on it from across the bench, so that way of finding out is negatory.
Good joke there. Clever seeing as the device repaired is from Scotland and all.
You must have been plaid to say that.
Majik........pronounced magic.
Linn products is a big lie
why ? they sound great