Today I have been gathering data and information for my 4m QRP transverter and started on an "on paper" design around an NE602 RX mixer, 2N3904 3rd overtone oscillator, 2N3904 driver(s) and a 2N3866 PA. It is surprising how much can be done on paper before you start by referring to datasheets and on-line RF calculators. I'm wondering if my T50-6 toroids will just stretch to 4m.
I remember my boss designed circuits on the back of Fag packets. He smoked a lot of Fags, and he is still in the land of the living.
ReplyDeleteTony
Hi Roger,
ReplyDeleteI am following your progress with interest.
Ian MW0IAN
Hello roger pleased to see your giving 4m a try i think you will realy enjoy this band especialy during the sporadic E season i am looking forward to see your transverter come togeather and may fire up the soldering iron i could do with building one for portable activity SOTA. etc
ReplyDelete73
David
Very interesting Roger. In The Netherlands it is expected that spring this year 70-70.5 MHz will come available for ham-radio. Thinking of building a transverter or buying an FM 4m rig like the Condor3000 (AS550).
ReplyDelete73
Ron
PA2RF