Jim,
I would have to ask the XV series designer, but he specified that those
transistors be mounted above the board. Likely for LO stability, and
better separation from the ground plane on the board.
I believe it should work mounted the same way in the XV50. If you find
LO instability, then mount it down on the board.
If you scraped the paint from all panels where they contact the 2D
connectors and the output jack, there should be little noise conducted
to the inside of the transverter.
73,
Don W3FPR
On 12/23/2018 1:30 PM, Jim KO5V wrote:
First, Happy Holidays to everyone, and thanks for all of the helpful advice
over the past few months.
Here's my question: in the XV144 and XV222 sections of the assembly manual, Q1
is installed with long leads, standing above the board. The XV50 instructions
do not mention this. Should I re-install it in the usual way (close to the
board), or leave it. Also, can anyone tell me the reason for elevating it in
the other XVs? That seems like a good way to pick up noise to me, but a lot of
you have forgotten more than I know about this stuff...
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