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 > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband