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Originally Posted by adibrook
I have a working 1MHz transistor xtal oscilaltor baord that I built. It produces about 3V p-p.
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I'm a little puzzled.
You have built a transistor crystal osc. and you want to use a valve to amplify this signal. Why mix these technologies? Unless there's a good reason - and as a consequence, the 250V and 6.3 vac are available - that's another overhead in the PSU dep't. A three transistor amp. should do a reasonable job - with or without tuned ccts. - and there are plenty of proven designs for this around. Further, you can always then further amp. the signal with a valve if your need / app. requires it.
As I say, perhaps there's more to your application than we yet know . . . .
Al / G8DLH