On Tue, 13 Sep 2005, Alan B. Pearce wrote:

>>> Well, I am getting there. It is amazing, to me, how
>>> difficult it is to lay out a decent board.
>>
>> There's a lot to it!
>
> Ain't there just ...
>
>> I always laugh when people ask for schematics for things like
>> high power RF amplifiers.. The PCB layout is just as much a
>> component in those designs, as anything that is on the schematics.
>> Trying to build something like that from a schematic alone
>> is pretty futile.
>
> One colleague I had reckoned that the circuits in the RCA handbooks were
> typical of this problem - it wasn't the components they showed, but rather
> the parasitics they didn't show, especially in the VHF and up circuits.

In my experience building anything VHF and above using active elements 
from a magazine article almost always results in building a more or less 
powerful transmitter. The exact frequency is usually determined by 
whoever you are jamming with it.

Peter
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