Hi B.Smith,
After looking over your R-390A Transceiver project documentation and
considering the information you provided below, I can think of two
possible ways of doing the project. One of them has advantages over the
other. Taking your R-390A information and looking on the web, it seems
that the minimum VFO to amplifier drive voltage is going to be around 5 V
peak to peak (Assuming a tube based amplifier and gotten from here:
https://www.frostburg.edu/personal/latta/ee/vfo/vfo.html ). So you
will need need either 1) some amplifier circuit that ties into and does
not load down the very low voltage ARR-41 "VFO" and provides
the requisite drive to an external Amplifier or 2) (my preferred option)
rebuild/modify the ARR-41 "VFO" so that if provides you the
desired drive voltage from the beginning, then voltage divide down the
drive voltage for the receiver circuitry. I think there are multiple
advantages to #2. It provides you with a solid signal for both
transmitter and receiver circuits. You are also then basically
replicating a lot of the steps you took with the R-390A project, which
you are familiar with and have experience in.
Thoughts/Comments?
73, Gordon KJ6IKT
P.S. a fellow "Smith" also ;)
At 06:01 PM 5/17/2022, B. Smith wrote:
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I've been playing with my ARR-41� receiver trying to figure out how
to use it in a "Transceive" mode similar to what I did with the
R-390A. (see link below) The plan would be to use the the main�
ARR-41 "VFO" that covers 2.5 to 3.5 Mhz. I would use this
signal as a drive signal for the transmitter converter.� �
How ever this signal (2.5 to 3.5) is very weak around� .1 ( point
one) Volt PP and any additional load on this signal degrades my input
into the 1st IF and reduces receiver sensitivity.
� I need a couple of volts PP and would like to stick with a fairly
simple� converter using a doubler, a osc/ mixer, and a 6CL6
stage� - - - then use the output to drive another transmitter
oscillator stage� or operate QRP with a couple of watts.
Any suggestons?
�
http://k4che.com/R390trans/R390Trans.htm
k4che