29 Jan 2011

137kHz transverter update

Breadboarded 137kHz 8W transverter (ERP 50uW from antenna)
Simple 137kHz QRP transverter - click for larger image
Today I combined the RX and TX parts of my 137kHz QRP transverter for the first time and all is working although I'm losing a few dB in RX sensitivity at the moment. Copying DL, SM, PA and G stations on WSPR RX. Best DX being 148km on WSPR TX.  Who says LF has to be hard? HI.
at 18:44
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3 comments:

Anonymous said...

Well done Roger.

Tony

Sun Jan 30, 10:49:00 am GMT+0
Anonymous said...

Hello Roger

I have just sent the new circuit to my iPod touch
to view at a latter date. Any more news on the four metre
transverter? Liked your YouTube clip.

Kind regards

Tony

Sun Jan 30, 09:54:00 pm GMT+0
Roger G3XBM said...

Tony
My 42MHz crystals should be here this week. Building and testing will follow quickly thereafter.

Mon Jan 31, 07:13:00 pm GMT+0

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