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Old 9th February 2003, 05:52 PM   #11
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Default Re: KT88/6550

Quote:
Originally posted by fdegrove
If it's just the output tubes you mean then this is intersting to read
So based on their suggestion KT88s... anything suitable other than these? Triodes?

dave
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Old 9th February 2003, 07:48 PM   #12
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Default Re: Re: KT88/6550

Quote:
Originally posted by planet10


So based on their suggestion KT88s... anything suitable other than these? Triodes?

dave
The Dyna OPT is 4300 ohms a-a, so,

300B / 2A3 / 6B4G
Trioded KT88s
EL84 trioded, parallel

and probably a few more when I get some sleep
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Old 9th February 2003, 07:57 PM   #13
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Thanks for the advises!
So the best choice would be the kt88, but there is a couple of manufactors which one is the best? I am thinking on the sound
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Old 9th February 2003, 08:01 PM   #14
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Quote:
Originally posted by Per Nielsen
Thanks for the advises!
So the best choice would be the kt88, but there is a couple of manufactors which one is the best? I am thinking on the sound
I like the Svets a lot. NOS KT88s are stupid money for my tastes.
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Old 9th February 2003, 08:38 PM   #15
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Thanks
Is there any body who has anoter opinion?
or else it will be the svets
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Old 9th February 2003, 09:27 PM   #16
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Default KT88

Hi,

Quote:
Is there any body who has anoter opinion?
Not me...they're reasonably priced and reliable.
I'd go for them.

Cheers,
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Old 9th February 2003, 09:29 PM   #17
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ok!
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Old 10th February 2003, 08:54 AM   #18
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My first tube amp is working !!!

My Dynacos is now working!!
I have just yoused the night on rewindding the output trafos with copper core, and replaced the gz-34 tubes with dioedes
And it works and sounds fine
But is it healthy for the amps that I youse diodes insteads of the Gz-34's


Can a output tube be to old? the ones im using is more than 20 years!
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Old 10th February 2003, 10:59 AM   #19
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Default DYNA.

Hi,

Glad to see they're working again.

Quote:
But is it healthy for the amps that I youse diodes insteads of the Gz-34's
Most likely the B+ is now somewhat higher than before due to the lower voltage drop of the diodes,you may need to find out what it should be according to the Dyanaco circuit diagram and up the resistor value in the PSU.

Quote:
Can a output tube be to old? the ones im using is more than 20 years!
It wouldn't hurt to have them checked and replaced if necessary.

Circuit diagram:

UNCLE NED'S.

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