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TRANS-RECEIVE OPERATION:
If you plan to use this transmitter with a Ramsey HR-series direct conversion
receiver for portable operation, it will be necessary to work out a receiver
muting and keying sidetone circuit. A matching companion to your transmitter
is the new Ramsey CW-7 CMOS Keyer, with built-in sidetone.
This transmitter is an ideal travel companion to the growing number of portable
shortwave broadcast receivers which feature digitally synthesized tuning,
memories and other features, provided that a BFO for CW-SSB reception is
one of the features. In most cases, transmitter keying can be monitored
directly from such receivers without too much overload, though it may be
necessary to rig a simple switch to mute or attenuate the audio or short the
antenna input to ground while transmitting.
THE RAMSEY ELECTRONICS CASE, KNOB & HARDWARE
OPTION:
Your finished transmitter can be installed in a variety of enclosures of your
own design and choosing. You might be planning to combine several Ramsey
circuit kit boards in a single enclosure. Use of the inexpensive and attractive
Ramsey case and knob set will give your unit that nice finished look and
increase its resale value. These sturdy black instrument cases are supplied
with printed overlayes on front and rear panels, knobs, rubber feet and
mounting screws.
OTHER ENCLOSURE RECOMMENDATIONS:
While we believe that the Ramsey enclosure and knob option is a fine value
for finishing off your Ramsey receiver or transmitter, we are happy to give you
a couple of additional suggestions and our reasons for them. If your first goal
is economy and rugged portability, you will find that the circuit board can be
mounted nicely in a standard VHS videotape storage box, which also gives
room for storing cables, a small homemade keyer, etc. The controls are easily
mounted at one end of such a box. It may be necessary to cut away the
molded posts which secure the tape itself. These storage boxes come in
several styles, so pick one which truly looks practical as a project enclosure.
To accomplish RF shielding, the most economical metal enclosure nicely
suited for Ramsey amateur kit board is Radio Shack No. 270-253A. This metal
utility cabinet can accommodate both a receiver and transmitter board, plus
speaker, with room for various refinements you might like to add.
Summary of Contents for QRP30
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