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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: Dynaco ST70 modification to use KT66 posted by tudo99@yahoo.com on May 28, 2024 at 21:49:41:
Welcome to the asylum!
The KT-66 is the MO Valve/Mullard Kink-less Tetrode (KT) version of the 5881, or 6L6GC (yes, the 5881 is the small form factor version by Sylvania...)
The 6L6 has less plate capacity (voltage) than the EL-34/6CA7 250-500 for the 6L6GC versus 450-800 for the EL-34
- this from the RC-30
In operation, a pair of 6L6GC typically yield ~30Watts, AB1 Push-pull
and 50 Watts for a pair of EL-34s in an AB1 PP circuit
Pin-outs are the same, but I would lower the Plate voltage and bias if you want to run 6L6s in a Stereo 70.
This way you'll get more than a few hours of run-time...
So have at it-
I have nothing to add on the driver circuit for this amp-
there are lots o' options, especially if you have good 7199s
Happy Listening
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Follow Ups
- RE: Dynaco ST70 modification to use KT66 - 6bq5 22:38:25 05/28/24 (3)
- RE: Dynaco ST70 modification to use KT66 - tudo99@yahoo.com 18:29:43 05/29/24 (2)
- RE: Dynaco ST70 modification to use KT66 - 6bq5 21:59:44 05/30/24 (1)
- RE: Dynaco ST70 modification to use KT66 - Triode_Kingdom 08:47:25 05/31/24 (0)
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