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Old 25th May 2020, 7:15 pm   #48
Skywave
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Join Date: Jun 2006
Location: Chard, South Somerset, UK.
Posts: 7,457
Arrow Re: Building A VHF Amplifier For Valve Sets

Quote:
Originally Posted by OldTechFan96 View Post
I'm still here! I've been trying to get my head around all of these posts!
Well you're certainly getting a lot of advice - and most of it makes good sense, too.
The one thing that is possibly troubling you is that with this cct. you have entered the hallowed ground of VHF devices and associated circuitry. There are few - if any - 'guaranteed to work' circuits in this frequency region. Even time-served engineers and technicians can sometimes struggle in this area. A good deal of the performance at VHF and above is very dependent on what I call 'the invisible components' - stray L and C, in other words. Those 'components' can be more influential in determining a VHF amplifier's performance in all its respects than the specific discrete ones. And then on top of that there is the very relevant matter of measuring the performance of what has then been constructed.

Al.
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