Lately Guthrie Govan is getting beautifully musical but I would love to take some online lessons. With the rate he's releasing videos I'd guess he's not got much spare time. Love the fingerstyle playing and jazzy, country, bluesy phrasing.
The "flying" cathode bias components next to the shielded wire is factory. I had a Rocket 35-EL that I was in several times, and I modded, which had the same 3 components there. The pins were kinda loose in mine, too. The green channel is based on an Ampeg V4 (interesting tone stack on the back of the pots), and the Red channel seems like a Marshall topology, but the amp has a small (Fender Vibroverb by MM) OT. It's a handmade amp. The PCB traces seem hand-drawn, even. Most of the build is very nice. I never had any issues with mine other than never really being 100% happy with the sound. It's too bad this one you got in had all these problems.
@@vintageguitaramp_guitarteacher - Hi, right on man! The mods I did weren't drastic, but mainly: cathode biasing changes for the 1st, shared gain stage to be more like Fender values & the cathode-bypass cap value for the next green channel-only gain stage to a larger value as well. Because, I always thought the amp sounded a bit too articulate, especially the green channel. The mods helped, but I eventually got rid of the amp after years of speaker swaps and those mods. I thought it sounded it's best with a Celestion Redback and 6CA7s.
I don't remember the brand but we had a can of old tuner and switch cleaner at the shop that said on the front of the can "leaves no residue" but on the back of the can said "cleans and lubricates". It seems unlikely that it can lubricate if it doesn't leave a residue........🤔
@@vintageguitaramp_guitarteacher , I have seen similar advertising hyperbole on various brands of contact cleaner, switch cleaner, tuner cleaner, and control cleaner. You cannot trust the Marketing Department to label the product accurately by cautioning what you cannot/should not use it on, nor to accurately state what properties or abilities it does or does not have. Marketing always wants to pitch the product as if it is the do all and end all, the Alpha and the Omega, all things to all people, "a contact cleaner for all seasons" as it were!😉 (And yes, this applies equally to expensive premium products like Deoxit).
I looked up the 989 manufacturer's code on the reverb drive transformer and it was made by Marvel Electronics of Chicago which might have been sort of affiliated with Magnetic Components, also out of Chicago, who made Classic Tone transformers. Both manufacturers went out of business in 2020.
What a horrible job removing the oily stuff and horrible solder Martyn.. Could someone have got the 'go' button stuck on a can of WD-40 ? The inside layout isn't easy on the eye, but my, my it sounds great, which might be helped along by that speaker combination. Brilliant playing as always mate.. You get the best out of the amps you work on and this one is no exception.
@@goodun2974 You have a good point.. Personally, I've only ever used WD-40 on car mechanics and needless to say it's difficult to judge how it reacts after time under those circumstances. May I take this opportunity to thank you for passing on your extensive knowledge and expertise of electronics in the comments section.
@@pda49184 , You are very welcome, and thank you for the kind words. At my age and with chronic health issues I'm well aware that at any moment I could indeed "take it with me when I go", the information in my head that is, so I try to disseminate some of it if I think it will be useful to others after I'm gone.
@@goodun2974 I'm 75 and not in great condition myself. But credit to you for passing on all your expertise before you go on to the next stages, whatever that may be.. If there's a place where all us amp nerds go, I'll look you up when I get there 😅, if you beat me to it of course 😅
@@pda49184, I'm only 66 but I've had 2 episodes of heart infections and 3 open heart surgeries, and some other related issues. Even the docs seem mystified that I'm still alive! I've also got some joint problems and Arthritis and even a touch of gout. If I truly realized what old age was going to be like I would have taken better care of myself when I was younger! But as a song once put it, we work life out to keep life in..... I am also painfully aware of what Bette Davis said: "old age ain't for sissies"!
Its kind of reminiscent of brads lazy j vid. Looks great from the outside and total #@£%show in the inside. Great video and superb playing! The board itself though looks ok and it sounds very decent!
@@vintageguitaramp_guitarteacher the length was fine. The only similarity with the lazy j is that they are selling it really expensive as a boutique amp as well.
At about 18:00 when Martyn is asking what I think about the floppily-mounted caps and ceramic resistors, I'm noticing a ground bolt inbetween the small PCB and a tube socket, on the heavily painted chassis, which doesnt appear to have had the paint sanded off before the grounding bolt snd terminal were installed..... there's probably several more similarly poor grounds throughout the amp. [Yup, at 21:45 I see another bad mechanical chassis-ground screw nearby, as Martyn is pointing out the wire that the factory forgot to solder].
@@vintageguitaramp_guitarteacher, I also noticed when you unbolted input jacks and pots that although star washers were used to try and make a mechanically and electrically sound ground connection, the chassis paint wasn't removed from around those panel holes and so you can guarantee they won't make a good ground.
You should measure the spacing of the foil pads on that preamp board or compare them to an ordinary 12AX7 type socket because that particular style of socket might have a wider than usual spacing where the pins go down through the board, and an ordinary 9 pin socket may require a jumper wire from each contact to the board in order to be able to make the correct spacing. BTW, 9 pin sockets to fit 12AX7 and EL84 tubes are technically referred to as Noval sockets. There is a more widely spaced "Novar " 9 pin tube and socket with pins/contacts arranged in a larger concentric circle ( larger vircumference), best known in audio circles for the 7868 tube used in vintage hifi and some guitar amps such as Ampeg (electronically identical to the 7591 but with a different base). Did you know that there are even 10 pin miniature tube sockets in 2 styles? At first glance they might look like a 12AX7 socket but one type of 10 pin socket has an extra contact in the center of the housing (not just a tubular ground shield/tie point) for an additional electrical connection with the very few tubes specially designed to fit it ( the 6X9 is one such); and there's another type of 10 pin socket where the 10 pins are arrayed in a concentric circle and the spacing of them is slightly different than it would be for a 12AX7.
At 29:38, PCB-mounted tube sockets that don't grip the tubes tightly is a constant problem because the socket contacts are supposed to "float", able to move around abd follow the pins as the tube is wiggled or vibrated; soldering the socket contacts directly to the circuit board fixes them in place and so any slight bends or misalignment of the tube pins forces the contacts open when a tube is inserted.
@@vintageguitaramp_guitarteacher , I could live with the socket contacts for the octal tubes because the tube is held in place with springy retainers and the tube pins themselves seem to be gripped fairly tightly by the contacts, but those pcb mounted 12AX7 sockets are terrible. Without tube shields to hold the tubes in place, the preamp tubes are likely to just vibrate and fall out. There are short tube shields available with separate bayonet bases that could be mounted to the middle chassis so as to make sure the preamp tubes stay in place....
Hello Alan. Yes, you are right I did think about it afterwards. That can be the only reason for it. Would have been a good idea if they had insulated it. Thanks for watching and take care.
@@vintageguitaramp_guitarteacher , well, I don't know exactly when Europe and UK went to the ROHS standards but lead-free solder was common in Japanese made audio video equipment from the 1990's onward, and so I'd expect to see it in a 2012 guitar amp as well. I'll comment further after I've had a chance to watch the whole video; we've been very busy with a young, energetic dog (German Shepherd/Great Pyrenees mix, 60 pounds at 6 months!) that we've been fostering for the past month; he just left for a new home this morning. We've been so busy, even in our retirement, that I've been watching videos for only 5 to 10 minutes at a time before I'm interrupted, have to referee the dogs when they're playing rough, pick up things that have been knocked over, clean up the occasional "accident"..... or put down my phone on my wife's orders because she thinks I spend too much time online (and yet, she's often on Facebook, which I refuse to join because that company is despicable).
@@vintageguitaramp_guitarteacher, I'm not sure when Europe instituted there ROHS legislation but Japanese hifi equipment was being built with lead-free solder in the 1990s. Anyway, I am still working my way through the video; I have been so busy, even in retirement, that I often can only watch long videos for 10 minutes at a time before being interrupted by my wife, or something involving our 3 dogs (for the past month we have also been fostering a 6 month old, 60 pound German Shepherd/Great Pyrenees puppy with boundless energy and a mischievous spirit ---' he just went to a new "forever home" yesterday, and everybody, including my own dogs, breathed a sigh of relief! He's gonna be a big'un, my guess would be well over 100 pounds when full-grown).
Martyn, the reason you try to be gentle in your assessment of even the worst amplifier builds is because you have a tea box on your bench that reminds you to be "diplomatic"! 😁
@@vintageguitaramp_guitarteacher , Even good quality leaded solder can sometimes ball up around the tube socket connections like we see here if the contact pins are mildly oxidized, or greasy, when first installed and soldered to. Heat from the tubes can accelerate further oxidation of the contacts, even underneath the solder. I'll tell you where I have frequently seen solder connections that look like the connections to the socket contacts here: Marantz stereo receivers from the 1970's, where the dial backlighting lamps resemble fuses and snap into fuse clips on a circuit board behind the tuning dial. The soldering to the clips is invariably intermittent, and the lamps will cut in and out if you tap the unit; the solder has become gray and grainy from the heat generated by red-hot, nearly white-hot fuse lamps, and looks like it has separated from the terminals, which have a hint of tarnish visible where they exit the solder joint. You can't simply add fresh solder to reflow those connections, you have to remove all the old solder first and clean the contacts of the clips that hold the lamps, and then resolder. (It's a tricky operation because the tuner dial string is in the way, and it'll melt in a nanosecond if you graze it with the soldering iron). I've worked on a lot of those old Marantz receivers and I've had to do this to almost every one; typically we would upgrade the fuse lamps to LED replacements to prevent further heat damage and discoloration to the plastic shroud and dial, but this usually required some modification to and reduction of the lamp-supply voltage as well as various tricks to improve the diffusion characteristics and the evenness of the dial backlighting, because LED lamps are beamy and directional whereas the incandescent lamps had a nearly 360° light radiation pattern. (The majority of vintage Marantz receivers you see on UA-cam that have been relamped with LED's are overly bright and the backlighting is uneven......but I digress.)
Hello Bob. That's the cathode bypass cap. When the amp is switched on to the 22 Watt setting it goes in to cathode bias. I spotted that it was on top of the resistor but I had my head in the maths and figuring out how they had wired the switch. I forgot to mention it in the video. I remembered later after I had done the demo that it needed to be changed and moved to the side. I have ordered a new one. There is going to be a part two as the tube sockets need to be changed. So I will sort the cap then. Thanks for watching and take care.
Hello. That would be one theory and would have been a good idea if they had bothered to insulate it. It's one of the most dangerous things I have seen in an amp. It was only the paint on the chassis that prevented a dead short. Thanks for watching and take care.
Hi Brice, that Celestion Alnico Gold speaker has a rounded can style cover that screws onto the back of the magnet housing. It looks like an old field coil speaker but it ain't. It's got no electro magnetic field coil. 👍
Musically, the circuit works great, but the execution of it was and to some extent still is terrible, and the internal fuse touching the chassis could have led to execution by electrocution.
Hello. Yes I agree. Part two is coming and I have a list of more things it needs. The cathode bypass cap strapped across the resistor. I spotted that then forgot about it while I was figuring out how the HI Low switch was wired. A few things that you spotted need sorting too. Take care.
Shameful work. Reminds me of the videos of the Lazy J amp that brad in Australia did. If that was someone's first diy kit amp id say it was an ok attempt. But someone is charging good money for these amps ?? Wow
"The dogs danglers" my first exposure to that analogy... Hilarious!¡!¡
Hello Brice. It's an old saying where I live. Take care.
That added fuse was a real treat! Clearly a "tech" has been inside the chassis before.
Hello Michael. Someone had clearly been in it. The fuse looked factory though. Take care Michael.
Pretty on the outside, ugly on the inside.
Nice job Martin, and lovely playing (as usual) ❤ 🎸🤘🏻
Hello, thank you. Yes, that's what I think too. There is going to a part two soon. Those tube sockets have got to go. Take care.
I say, I've never seen anyone play a guitar w/ bass techniques. Really quite impressive
Hello Brice, thank you. Guthrie Govan is a master of slap on the guitar. Thanks for watching and take care.
@@vintageguitaramp_guitarteacher , Guthrie Govan is one hell of a technician but your playing strikes me as being more musical!
Lately Guthrie Govan is getting beautifully musical but I would love to take some online lessons. With the rate he's releasing videos I'd guess he's not got much spare time. Love the fingerstyle playing and jazzy, country, bluesy phrasing.
Man you're good. Fixing and playing.
Hello David, thank you. Take care
@@vintageguitaramp_guitarteacher I know right!! I don't know which one he is better at PLAYING OR REPAIRING I THINK WORLD CLASS FOR BOTH TO BE HONEST
Tube chart says "Rock on, Dave! Best wishes! Dan".
I forgot to revisit that. I couldn't see it with the glasses I had n when I was filming.
The "flying" cathode bias components next to the shielded wire is factory. I had a Rocket 35-EL that I was in several times, and I modded, which had the same 3 components there. The pins were kinda loose in mine, too. The green channel is based on an Ampeg V4 (interesting tone stack on the back of the pots), and the Red channel seems like a Marshall topology, but the amp has a small (Fender Vibroverb by MM) OT. It's a handmade amp. The PCB traces seem hand-drawn, even. Most of the build is very nice. I never had any issues with mine other than never really being 100% happy with the sound. It's too bad this one you got in had all these problems.
Hello, thank you. Some really good info there. Did the mods get the sound more to your liking?
@@vintageguitaramp_guitarteacher - Hi, right on man! The mods I did weren't drastic, but mainly: cathode biasing changes for the 1st, shared gain stage to be more like Fender values & the cathode-bypass cap value for the next green channel-only gain stage to a larger value as well. Because, I always thought the amp sounded a bit too articulate, especially the green channel. The mods helped, but I eventually got rid of the amp after years of speaker swaps and those mods. I thought it sounded it's best with a Celestion Redback and 6CA7s.
My god man, gorgeous playing!
Hello Brad, thank you. It's a great sounding amp. But not great under the bonnet. Take care.
@@vintageguitaramp_guitarteacher, discussions of amps with Plexi faceplates must always be approached from the right Perspex-tive ! 😉😁
Martyn consistently underplays what a great player he is. 👍👏
Ha Ha Ha Ha. Trust you to think of that one. That made me laugh.
Thank you. A little rusty these days though.!
Sounds great, awesome guitar playing.
Hello, thank you. Thanks for watching. Take care.
I don't remember the brand but we had a can of old tuner and switch cleaner at the shop that said on the front of the can "leaves no residue" but on the back of the can said "cleans and lubricates". It seems unlikely that it can lubricate if it doesn't leave a residue........🤔
Ha Ha, that. Make you mind up switch cleaner!!!
@@vintageguitaramp_guitarteacher , I have seen similar advertising hyperbole on various brands of contact cleaner, switch cleaner, tuner cleaner, and control cleaner. You cannot trust the Marketing Department to label the product accurately by cautioning what you cannot/should not use it on, nor to accurately state what properties or abilities it does or does not have. Marketing always wants to pitch the product as if it is the do all and end all, the Alpha and the Omega, all things to all people, "a contact cleaner for all seasons" as it were!😉 (And yes, this applies equally to expensive premium products like Deoxit).
"Every day, in every way, I am getting better and better". Dreyfus
Sounds like a John Lennon lyric from "Beautiful Boy'.
Ha Ha Ha
It does. But which came first? The film? Or the song?
@vintageguitaramp_guitarteacher
I thought "Drefuss" was some arcane philosophy reference, not Richard Drefuss!.
I've seen the movie too, hahahaha!.
@vintageguitaramp_guitarteacher
I prefer the Lennon song,,,,,,,,,,,
I looked up the 989 manufacturer's code on the reverb drive transformer and it was made by Marvel Electronics of Chicago which might have been sort of affiliated with Magnetic Components, also out of Chicago, who made Classic Tone transformers. Both manufacturers went out of business in 2020.
Good transformers but the rest is junk. It don't make sense.
What a horrible job removing the oily stuff and horrible solder Martyn.. Could someone have got the 'go' button stuck on a can of WD-40 ? The inside layout isn't easy on the eye, but my, my it sounds great, which might be helped along by that speaker combination. Brilliant playing as always mate.. You get the best out of the amps you work on and this one is no exception.
WD40 eventually dries and leaves a crusty residue behind. My guess would be somebody used a silicone based spray.
@@goodun2974 You have a good point.. Personally, I've only ever used WD-40 on car mechanics and needless to say it's difficult to judge how it reacts after time under those circumstances. May I take this opportunity to thank you for passing on your extensive knowledge and expertise of electronics in the comments section.
@@pda49184 , You are very welcome, and thank you for the kind words. At my age and with chronic health issues I'm well aware that at any moment I could indeed "take it with me when I go", the information in my head that is, so I try to disseminate some of it if I think it will be useful to others after I'm gone.
@@goodun2974 I'm 75 and not in great condition myself. But credit to you for passing on all your expertise before you go on to the next stages, whatever that may be.. If there's a place where all us amp nerds go, I'll look you up when I get there 😅, if you beat me to it of course 😅
@@pda49184, I'm only 66 but I've had 2 episodes of heart infections and 3 open heart surgeries, and some other related issues. Even the docs seem mystified that I'm still alive! I've also got some joint problems and Arthritis and even a touch of gout. If I truly realized what old age was going to be like I would have taken better care of myself when I was younger! But as a song once put it, we work life out to keep life in..... I am also painfully aware of what Bette Davis said: "old age ain't for sissies"!
Its kind of reminiscent of brads lazy j vid. Looks great from the outside and total #@£%show in the inside. Great video and superb playing! The board itself though looks ok and it sounds very decent!
Hello, thank you. The video did get a bit long though. Thanks for watching. I will give Brad's video a watch. Take care.
@@vintageguitaramp_guitarteacher the length was fine. The only similarity with the lazy j is that they are selling it really expensive as a boutique amp as well.
I think that was the idea with this one when they came out .
At about 18:00 when Martyn is asking what I think about the floppily-mounted caps and ceramic resistors, I'm noticing a ground bolt inbetween the small PCB and a tube socket, on the heavily painted chassis, which doesnt appear to have had the paint sanded off before the grounding bolt snd terminal were installed..... there's probably several more similarly poor grounds throughout the amp. [Yup, at 21:45 I see another bad mechanical chassis-ground screw nearby, as Martyn is pointing out the wire that the factory forgot to solder].
Part two hear we come lol
@@vintageguitaramp_guitarteacher, I also noticed when you unbolted input jacks and pots that although star washers were used to try and make a mechanically and electrically sound ground connection, the chassis paint wasn't removed from around those panel holes and so you can guarantee they won't make a good ground.
You should measure the spacing of the foil pads on that preamp board or compare them to an ordinary 12AX7 type socket because that particular style of socket might have a wider than usual spacing where the pins go down through the board, and an ordinary 9 pin socket may require a jumper wire from each contact to the board in order to be able to make the correct spacing. BTW, 9 pin sockets to fit 12AX7 and EL84 tubes are technically referred to as Noval sockets. There is a more widely spaced "Novar " 9 pin tube and socket with pins/contacts arranged in a larger concentric circle ( larger vircumference), best known in audio circles for the 7868 tube used in vintage hifi and some guitar amps such as Ampeg (electronically identical to the 7591 but with a different base). Did you know that there are even 10 pin miniature tube sockets in 2 styles? At first glance they might look like a 12AX7 socket but one type of 10 pin socket has an extra contact in the center of the housing (not just a tubular ground shield/tie point) for an additional electrical connection with the very few tubes specially designed to fit it ( the 6X9 is one such); and there's another type of 10 pin socket where the 10 pins are arrayed in a concentric circle and the spacing of them is slightly different than it would be for a 12AX7.
Hello. I had a bit of measure up. The Belton sockets will fit. Some good info there. Take care.
At 29:38, PCB-mounted tube sockets that don't grip the tubes tightly is a constant problem because the socket contacts are supposed to "float", able to move around abd follow the pins as the tube is wiggled or vibrated; soldering the socket contacts directly to the circuit board fixes them in place and so any slight bends or misalignment of the tube pins forces the contacts open when a tube is inserted.
Hello. The sockets are coming out. Spoke withe customer. Take care
@@vintageguitaramp_guitarteacher , I could live with the socket contacts for the octal tubes because the tube is held in place with springy retainers and the tube pins themselves seem to be gripped fairly tightly by the contacts, but those pcb mounted 12AX7 sockets are terrible. Without tube shields to hold the tubes in place, the preamp tubes are likely to just vibrate and fall out. There are short tube shields available with separate bayonet bases that could be mounted to the middle chassis so as to make sure the preamp tubes stay in place....
Back up fuse to prevent damage from owner fitting a 25Amp when there is a fault condition?
Hello Alan. Yes, you are right I did think about it afterwards. That can be the only reason for it. Would have been a good idea if they had insulated it. Thanks for watching and take care.
It looks like somebody added leaded solder without removing the old lead-free solder first.
Hello. Maybe. It was a swine to remove. I would have thought this would have been made with lead solder. What do you think to the construction?
@@vintageguitaramp_guitarteacher , well, I don't know exactly when Europe and UK went to the ROHS standards but lead-free solder was common in Japanese made audio video equipment from the 1990's onward, and so I'd expect to see it in a 2012 guitar amp as well. I'll comment further after I've had a chance to watch the whole video; we've been very busy with a young, energetic dog (German Shepherd/Great Pyrenees mix, 60 pounds at 6 months!) that we've been fostering for the past month; he just left for a new home this morning. We've been so busy, even in our retirement, that I've been watching videos for only 5 to 10 minutes at a time before I'm interrupted, have to referee the dogs when they're playing rough, pick up things that have been knocked over, clean up the occasional "accident"..... or put down my phone on my wife's orders because she thinks I spend too much time online (and yet, she's often on Facebook, which I refuse to join because that company is despicable).
@@vintageguitaramp_guitarteacher, I'm not sure when Europe instituted there ROHS legislation but Japanese hifi equipment was being built with lead-free solder in the 1990s. Anyway, I am still working my way through the video; I have been so busy, even in retirement, that I often can only watch long videos for 10 minutes at a time before being interrupted by my wife, or something involving our 3 dogs (for the past month we have also been fostering a 6 month old, 60 pound German Shepherd/Great Pyrenees puppy with boundless energy and a mischievous spirit ---' he just went to a new "forever home" yesterday, and everybody, including my own dogs, breathed a sigh of relief! He's gonna be a big'un, my guess would be well over 100 pounds when full-grown).
Martyn, the reason you try to be gentle in your assessment of even the worst amplifier builds is because you have a tea box on your bench that reminds you to be "diplomatic"! 😁
I reckon the mystery metal on those socket pins was nicked from a dentist's office.
Mercury amalgam for filling teeth!
Hello. You might be right there. Thanks for watching and take care.
@@vintageguitaramp_guitarteacher , Even good quality leaded solder can sometimes ball up around the tube socket connections like we see here if the contact pins are mildly oxidized, or greasy, when first installed and soldered to. Heat from the tubes can accelerate further oxidation of the contacts, even underneath the solder. I'll tell you where I have frequently seen solder connections that look like the connections to the socket contacts here: Marantz stereo receivers from the 1970's, where the dial backlighting lamps resemble fuses and snap into fuse clips on a circuit board behind the tuning dial. The soldering to the clips is invariably intermittent, and the lamps will cut in and out if you tap the unit; the solder has become gray and grainy from the heat generated by red-hot, nearly white-hot fuse lamps, and looks like it has separated from the terminals, which have a hint of tarnish visible where they exit the solder joint. You can't simply add fresh solder to reflow those connections, you have to remove all the old solder first and clean the contacts of the clips that hold the lamps, and then resolder. (It's a tricky operation because the tuner dial string is in the way, and it'll melt in a nanosecond if you graze it with the soldering iron). I've worked on a lot of those old Marantz receivers and I've had to do this to almost every one; typically we would upgrade the fuse lamps to LED replacements to prevent further heat damage and discoloration to the plastic shroud and dial, but this usually required some modification to and reduction of the lamp-supply voltage as well as various tricks to improve the diffusion characteristics and the evenness of the dial backlighting, because LED lamps are beamy and directional whereas the incandescent lamps had a nearly 360° light radiation pattern. (The majority of vintage Marantz receivers you see on UA-cam that have been relamped with LED's are overly bright and the backlighting is uneven......but I digress.)
From the number of greasy tube sockets you see, I can only surmise that someone is building amplifiers on a North Sea oil rig!
Let Castrol man repair your amp. He's slick and quick. Grease his palms with silver for a great repair.
That's just criminal. Whether from factory or incompetent "techs". And is that a capacitor lying on top of that gold power resistor?
Hello Bob. That's the cathode bypass cap. When the amp is switched on to the 22 Watt setting it goes in to cathode bias. I spotted that it was on top of the resistor but I had my head in the maths and figuring out how they had wired the switch. I forgot to mention it in the video. I remembered later after I had done the demo that it needed to be changed and moved to the side. I have ordered a new one. There is going to be a part two as the tube sockets need to be changed. So I will sort the cap then. Thanks for watching and take care.
Is the extra fuse incase some puts an over rated one in the holder
Hello. That would be one theory and would have been a good idea if they had bothered to insulate it. It's one of the most dangerous things I have seen in an amp. It was only the paint on the chassis that prevented a dead short. Thanks for watching and take care.
I've never seen an amp with one field coil speaker and one modern
Hi Brice, that Celestion Alnico Gold speaker has a rounded can style cover that screws onto the back of the magnet housing. It looks like an old field coil speaker but it ain't. It's got no electro magnetic field coil. 👍
Hello Brice. Rob is right. The Gold speaker has an Alnico magnet. Mixing speakers seems to be a trend now days. It does sound good Take care
G'day fella!
Hello Brad. How's you?
Brad, does this measure up to the Lazy J ?? 😂
Musically, the circuit works great, but the execution of it was and to some extent still is terrible, and the internal fuse touching the chassis could have led to execution by electrocution.
Hello. Yes I agree. Part two is coming and I have a list of more things it needs. The cathode bypass cap strapped across the resistor. I spotted that then forgot about it while I was figuring out how the HI Low switch was wired. A few things that you spotted need sorting too. Take care.
Why would anyone pay the kind of money for one of these when it's destined for landfill in under a decade?.
Hello Keiran . Yes, that's a lot of Dollar or a PC board amp. Take care.
Shameful work. Reminds me of the videos of the Lazy J amp that brad in Australia did.
If that was someone's first diy kit amp id say it was an ok attempt.
But someone is charging good money for these amps ?? Wow
Hello. I watched part one of that video yesterday. That was a shocker. Take care.