Hi John,
congrats...
Just 1p note > be careful with the back to back diodes in the front-end.
These are not the best solution in some cases because of possible IMD
issue.
73 - Petr, OK1RP
B: goo.gl/Fd2JhJ
On Tue, Oct 31, 2017, at 07:50 AM, John Randall via Topband wrote:
> Lat night I worked two stations YU1XA and I5JVA and was happy with that,
> then went to bed. I have now cured most of my QRN and common mode
> problems and could see weaker stations on the flex panadapter. Silly me,
> I did learn a painful lesson £2.50 when my preamp went dead and upon
> opening it up, I realized that I had forgotten to add double back to back
> diodes across the preamp input. A new 2n5109 and protection diodes was
> soldered into place and I was back on the air.
> Next step is to make a loop antenna for receive.
> 73John - M0ELS
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