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Old 8th February 2003, 03:32 PM   #1
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Default Old tube amp

I just got a couple of 40 years old Dynaco mark3 tube amps they are pretty smashed up, so i am thinking on restoring them, but the trafos dosent work anymore, so here comes the question anyone how knows were I can get some, I can use instead?

I have also heard that the Dynaco mark 3 is a very good amps, even today! Is that right or is it totally inaudible???and not worth saving?
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Old 8th February 2003, 04:04 PM   #2
dhaen is offline dhaen  Europe
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Per,

Welcome to the forum
Which transformers don't work?
How did you test them?

Cheers,
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Old 8th February 2003, 04:23 PM   #3
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Thanks!

The output transformers, the core is broken somewhere in both of them there is no connection on the primary side of the trafos.
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Old 8th February 2003, 04:49 PM   #4
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Magnequest do reproduction ones from the original blueprints. But they're not cheap and shipping to Europe won't be either.

http://store.yahoo.com/triodeel/magnequest.html

Model MQ 431 CL

Perhaps someone in Europe could make a replica, or you could get some second hand off ebay. They come up regularly.
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Old 8th February 2003, 04:56 PM   #5
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Thanks for the advise
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Old 8th February 2003, 05:00 PM   #6
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Which tubes should I youse for the mark 3? KT88 or 6550 and what is the diffrence? Sorry! That might be a stupid question for you guess, but this is my first tube amp!
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Old 8th February 2003, 05:13 PM   #7
dhaen is offline dhaen  Europe
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Per,

Brian Sowter will wind some for you:

http://www.sowter.co.uk

He is always happy to quote.

Cheers,
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Old 9th February 2003, 12:32 AM   #8
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Default SAME,SAME...SAME.

Hi,

Quote:
KT88 or 6550 and what is the diffrence?
Historically and technically....,yes.

As far as NOS goes you may be able to unearth some NOS 6550s but hardly a decent KT88 GEC.

The Dynasours will be happy with either current production KT88 or 6550A.

There are more differences between the remaining manufacturers than between the type of tubes nowadays.

Cheers,
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Old 9th February 2003, 04:22 AM   #9
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Default Re: SAME,SAME...SAME.

Quote:
Originally posted by fdegrove
The Dynasours will be happy with either current production KT88 or 6550A.
Anything you might suggest, if the intention was not to restore, but to just use the iron?

dave
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Old 9th February 2003, 02:15 PM   #10
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Default KT88/6550

Hi,

Quote:
Anything you might suggest, if the intention was not to restore, but to just use the iron?
If it's just the output tubes you mean then this is intersting to read:

COMPARATIVE LISTENING TEST

Cheers,
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