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Hoffman Amps Forum image Author Topic: Replicate tube stage with LND150's  (Read 2410 times)

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Offline joesatch

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Replicate tube stage with LND150's
« on: September 07, 2023, 02:06:40 pm »
Can these stages be replicated with LND's?  wrong answers only. I want to avoid using a tube for this output stage as it is only for boosting the level, not part of the preamp


Offline bmccowan

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Re: Replicate tube stage with LND150's
« Reply #1 on: September 07, 2023, 02:37:23 pm »
Quote
Can these stages be replicated with LND's?  wrong answers only.
OK, I think I can provide a wrong answer; only if shaken, not stirred.
Mac
“To my surprise, when I opened my eyes, I was the victim of a great compromise.”
John Prine

Offline sluckey

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A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline joesatch

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Re: Replicate tube stage with LND150's
« Reply #3 on: September 09, 2023, 09:27:00 am »
ok i replaced the triodes with LND's the result is quite good although less bass (i guess just cleaner) than the triode and output is considerably higher. i will need to play with the voltage divider to get the output manageable.  I will go with this. there is some mention of using diodes to protect the transistor and possibly a 200R resistor somewhere but i'm unsure where.

 


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