Hmm, i don't know if it good to change the capacitors and transistors inside because these germanium transistor based amps are balanced to work with specific components now hard to find. I found also by lack a Grundig sv80m amp and after some cleaning and polishing of the wooden case, it plays nice and ready for selling.
Amazing - thanks for this. Strangely, I found the same combination of tuner and amp in my attic (my wife was about to get rid of it!). Just a question, how do I conn t speakers to the amp? I'm asking because there is no +ve or -ve speaker terminals on the amp - just left and right? How do I connect the +ve and -ve from the speaker to right and left of the terminal? Many thanks in advance!
I have a feeling all the old american made hifi products have never been exported to Europe. I have never had, not even seen anything from companies like Zenith or Philco or RCA. Even on Ebay (the German section) where you can usually find everything - no american made audio equipment! I once very briefly had an early 90s Zenith laptop, but I guess that was already made in Japan or Taiwan or so.
Kannst du dir vorstellen, wie schwer es ist, mitten im Sprachfluss von englischem Akzent zu deutschem Akzent zu wechseln? Wenn ich darauf achten würde, könnte ich nur halb so schnell sprechen, was Leuten wie dir wohl auch nicht recht wäre :P
Dr cassette, I've just blown an output on my SV40 m... about half an hour after getting it!!!!I It was sounding really great through my kef choral, (I replaced the caps in them) I wanted to try my Kef 104/2's, ... I disconnected the chorals, and instead of plugging in the lead from the 104, plugged in the lead that was connected to another amp. I heard a faint tick tick tick tick..,coming from behind the speaker input ... realised what I'd done, pulled it out, but now the left channel badly distorts (right is still ok) Any idea? Blown output transfo, knackered transistor? I'm extremely pissed off!! it's a 5 ohm 25 watt amp.
The SV40 shouldn't have an output transformer, it's too new for that. It seems like a dead transistor. Not necessarily shorted as that would ultimately lead to some fireworks somewhere (hopefully inside a fuse!). A transistor could have gone open, resulting in only half of the signal being amplified (push-pull output stage). That would result in such distortion. First step is testing the output transistors. Regardless of weather there's anything wrong or not, the next step is testing the driver stage. If there's a fault in there, only replacing the output transistors will only result in more trouble.
Hi Doc, thanks for your fast reply. Nightmare on elm st really. I'm not even sure how to test output transistors. I will get someone to look at it. It's been repaired before (there's 4 smallish capacitors on the inverted circuit board that are not original, and the two fuses on the back, someone's made a new holder and run wires to the original. Here's a link to a french site, the guy does some interesting stuff audio.mezei.fr/pages/GrundigSV40.html 2nd pi down shows the circuit board. Mine has the 4 1 inch 'things' on it... market 5600 H and 5800H... no marking for farads so not even sure they are capacitors. The sound I got out of it before blowing it means I will get it repaired, or get another. And as it's cheaper to get another unless you can do it yourself, I'll probably get another and use this one for spares. + geranium transistors,... how are you going to replace that!!! Where's the protection, how can they so easily be knackered?? it's like Luxman, I've got a 230L ,very very fragile and doesn't like being connected to and from. I found the sound (before breaking it) to be very airy and very good. )in a nutshell!!) Honestly, the kef choral with the crossover 4 capacitors in each replaced, (8 in total - two 5 micro farads 50 volts, and two 16 micro fards, but I could ony get 450 volt for these as the store didn't sell 50V). With the Sansui 661, and a Philips 386, the sound was not good. No soundstage, sound coming from the boxes, and dull. Better than it had been with the original capacitors, and more balanced, as one cap had a bad fit to the board, but still, nothing to write home about, as they say. When I plugged them into this Grundig. Wow. Switching to the Sansui with the 104's, no where near as pleasant. (I use a Sony CDP D7 which has two sets of outputs. I had wondered if I'd slipped up, buying the 450 volt 16 mf.... but they sound good! No need to spend silly money getting 50 volt caps from Falcon acoustics. The ones I bought, ebay Tube Amp doctor (guitar tech stuff), are good! I could finally hear it!! Anyway, thanks for the reply DC. I am so *ucking pissed I got the wires mixed up. What an idiot. I will look into how to test a transistor, after I've looked for another SV40 for sale....
Oh my, I didn't realize the amp was this old... Of course, if it uses Germanium transistors, you are in trouble if one of them fails... Indeed the old 60s and 70s German equipment sounds quite nice, I find it's designed to give a very pleasant sound, while the Japanese equipment aims much more for accuracy. Don't have enough experience with English equipment except for speakers which I do find to be the best. I have some Transmissionline Speakers I built, based on KEF chassis. And I have the BBC LS3/5A monitor speakers (the Spendor version).
DC, what happened exactly. ... the AC speaker output from the Sansui, went directly into the speaker out connection on the back of the Grundig. It's a pain to explain what would be simple to see, but the end result was the current out from the sansui going stright into the speaker output of the Grundig (instead of where it usually goes, a speaker)!! The Grundig did not like this input voltage through it's usual putput. As I mentioned, I heard a faint tick tick tick tick tick....while it was connected.
![If you can't hear this then you're not an audiophile [See description for link to followup video]](http://i.ytimg.com/vi/48PxwspDvrE/mqdefault.jpg)
![If you can't hear this then you're not an audiophile [See description for link to followup video]](/img/tr.png)
What a nice pair of components, hope you get the hissing sorted out.
That tuner looks awesome.
Hmm, i don't know if it good to change the capacitors and transistors inside because these germanium transistor based amps are balanced to work with specific components now hard to find. I found also by lack a Grundig sv80m amp and after some cleaning and polishing of the wooden case, it plays nice and ready for selling.
They look very smart, nice find :)
i like that a lot,just the kind i collect i love it.
Amazing - thanks for this. Strangely, I found the same combination of tuner and amp in my attic (my wife was about to get rid of it!). Just a question, how do I conn t speakers to the amp? I'm asking because there is no +ve or -ve speaker terminals on the amp - just left and right? How do I connect the +ve and -ve from the speaker to right and left of the terminal? Many thanks in advance!
+Clyde Araujo
The amplifier uses DIN speaker connectors.
en.wikipedia.org/wiki/DIN_connector#Loudspeaker_connector
+DrCassette Thanks!
Witch tuner is the best grundig rt-100 or grundig rt-200 ?
They look great !!!
Schöne Teile. Hast du die Kombi noch?
Der Verstärker ist verkauft, der Tuner steht hier noch und wartet...
I have a feeling all the old american made hifi products have never been exported to Europe. I have never had, not even seen anything from companies like Zenith or Philco or RCA. Even on Ebay (the German section) where you can usually find everything - no american made audio equipment!
I once very briefly had an early 90s Zenith laptop, but I guess that was already made in Japan or Taiwan or so.
will you keep it,or ebay i would buy it.
Kannst du dir vorstellen, wie schwer es ist, mitten im Sprachfluss von englischem Akzent zu deutschem Akzent zu wechseln? Wenn ich darauf achten würde, könnte ich nur halb so schnell sprechen, was Leuten wie dir wohl auch nicht recht wäre :P
Dr cassette, I've just blown an output on my SV40 m... about half an hour after getting it!!!!I
It was sounding really great through my kef choral, (I replaced the caps in them)
I wanted to try my Kef 104/2's, ... I disconnected the chorals, and instead of plugging in the lead from the 104, plugged in the lead that was connected to another amp. I heard a faint tick tick tick tick..,coming from behind the speaker input ... realised what I'd done, pulled it out, but now the left channel badly distorts (right is still ok)
Any idea? Blown output transfo, knackered transistor? I'm extremely pissed off!! it's a 5 ohm 25 watt amp.
The SV40 shouldn't have an output transformer, it's too new for that. It seems like a dead transistor. Not necessarily shorted as that would ultimately lead to some fireworks somewhere (hopefully inside a fuse!). A transistor could have gone open, resulting in only half of the signal being amplified (push-pull output stage). That would result in such distortion. First step is testing the output transistors. Regardless of weather there's anything wrong or not, the next step is testing the driver stage. If there's a fault in there, only replacing the output transistors will only result in more trouble.
Hi Doc, thanks for your fast reply. Nightmare on elm st really. I'm not even sure how to test output transistors. I will get someone to look at it. It's been repaired before (there's 4 smallish capacitors on the inverted circuit board that are not original, and the two fuses on the back, someone's made a new holder and run wires to the original.
Here's a link to a french site, the guy does some interesting stuff
audio.mezei.fr/pages/GrundigSV40.html
2nd pi down shows the circuit board. Mine has the 4 1 inch 'things' on it... market 5600 H and 5800H... no marking for farads so not even sure they are capacitors.
The sound I got out of it before blowing it means I will get it repaired, or get another. And as it's cheaper to get another unless you can do it yourself, I'll probably get another and use this one for spares. + geranium transistors,... how are you going to replace that!!! Where's the protection, how can they so easily be knackered?? it's like Luxman, I've got a 230L ,very very fragile and doesn't like being connected to and from.
I found the sound (before breaking it) to be very airy and very good. )in a nutshell!!)
Honestly, the kef choral with the crossover 4 capacitors in each replaced, (8 in total - two 5 micro farads 50 volts, and two 16 micro fards, but I could ony get 450 volt for these as the store didn't sell 50V). With the Sansui 661, and a Philips 386, the sound was not good. No soundstage, sound coming from the boxes, and dull. Better than it had been with the original capacitors, and more balanced, as one cap had a bad fit to the board, but still, nothing to write home about, as they say.
When I plugged them into this Grundig. Wow. Switching to the Sansui with the 104's, no where near as pleasant. (I use a Sony CDP D7 which has two sets of outputs.
I had wondered if I'd slipped up, buying the 450 volt 16 mf.... but they sound good! No need to spend silly money getting 50 volt caps from Falcon acoustics. The ones I bought, ebay Tube Amp doctor (guitar tech stuff), are good! I could finally hear it!!
Anyway, thanks for the reply DC. I am so *ucking pissed I got the wires mixed up. What an idiot.
I will look into how to test a transistor, after I've looked for another SV40 for sale....
Oh my, I didn't realize the amp was this old... Of course, if it uses Germanium transistors, you are in trouble if one of them fails...
Indeed the old 60s and 70s German equipment sounds quite nice, I find it's designed to give a very pleasant sound, while the Japanese equipment aims much more for accuracy. Don't have enough experience with English equipment except for speakers which I do find to be the best. I have some Transmissionline Speakers I built, based on KEF chassis. And I have the BBC LS3/5A monitor speakers (the Spendor version).
have u seen the price of LS3's lately? :o) Very sought after.
DC, what happened exactly. ...
the AC speaker output from the Sansui, went directly into the speaker out connection on the back of the Grundig.
It's a pain to explain what would be simple to see, but the end result was the current out from the sansui going stright into the speaker output of the Grundig (instead of where it usually goes, a speaker)!!
The Grundig did not like this input voltage through it's usual putput.
As I mentioned, I heard a faint tick tick tick tick tick....while it was connected.
what quality sound
Grundig! Nicht Grandich