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Old 1st Aug 2007, 9:11 pm   #1
Robert Darwent
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Default Akkord 'Jonny' K57 schematics? (Should read M58).

Can anyone supply me with the schematics for this set please?

It is a very similar model to that in my earlier request in thread;
https://www.vintage-radio.net/forum/...ad.php?t=19100

It is so similar that I can probably get by with the schematics Howard supplied me with for the K58. However the M57 appears to use 90v HT and V1 is a DK96 whereas the K58 uses 75v HT and V1 is a DK92, so there may be other important circuit differences as well.

Any assistance appreciated.
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Old 1st Aug 2007, 11:12 pm   #2
petervk2mlg
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Default Re: Akkord 'Jonny' K57 schematics? (Should read M58).

I think this is what you need.
Peter
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File Type: pdf akkord57.pdf (97.4 KB, 127 views)
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Old 2nd Aug 2007, 1:34 am   #3
Robert Darwent
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Default Re: Akkord 'Jonny' K57 schematics? (Should read M58).

Thanks for that Peter, its very much appreciated.

However I've just noticed that I made a mistake in the model numbers. I've transposed the two numbers. I actually have a K57 and a M58, not as I have stated in the title and my first post in this thread. But the schematic you've provided is closer than the data I already have.

Don't suppose you've also got the M58 schematic which I should have asked for in the first place?
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Last edited by Robert Darwent; 2nd Aug 2007 at 1:40 am.
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Old 2nd Aug 2007, 9:02 am   #4
petervk2mlg
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Default Re: Akkord 'Jonny' K57 schematics? (Should read M58).

Sadly, I cannot oblige.

P
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Old 2nd Aug 2007, 7:37 pm   #5
Robert Darwent
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Default Re: Akkord 'Jonny' K57 schematics? (Should read M58).

That's OK Peter, thanks again for the M57 pdf

I've done a bit of digging on the internet and believe the M58 that I have is virtually identical to the M57. The only difference I can see is that the M58 uses a DK96 first valve, whereas the M57 uses a DK92. Everything else appears the same.

Your help was much appreciated
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