Rev:Nobember 20. 2006
19
Adjust the Preselector Pot to noise maximum. This is extrem sharp, only a
mm with the knob. Adjusting the Preselector needs some training because it
is so extrem sharp. If the preselector is adjusted, find the Signal with the
VFO. If you do not find it, increase the signal a little bit for the first time.
Now disconnect the generator because this lowers the actual Q of L1 which
makes it harder to adjust. Use some 10cm wire attached to the inner
conductor of the BNC jack as a very short antenna and couple the signal to
this antenna. It must not be loud, it must just be audible.
Adjust L1 and L2 using a nonconductive tool to maximum of AGC Voltage.
Redo adjustment several times using the smallest possible signal. During
adjustment do NOT change the Preselector Pot.
All ok?
Its on your own, what you will do next: listening into the bands or build
the TX parts. I heard from some QRPers that stey stopped soldering for
severals days, while they were playing with their new BCR receiver
However, the TX part does not leave too much work because some groups
are used in the RX as well so they are still built.
Summary of Contents for Blue Cool Radio
Page 24: ...Rev November 20 2006 24 ...
Page 27: ...Rev Nobember 20 2006 27 DDS Unit ...
Page 28: ...Rev November 20 2006 28 BCR Mainboard Part side complete ...
Page 29: ...Rev Nobember 20 2006 29 BCR mainboard Solderside SMT Parts ...
Page 30: ...Rev November 20 2006 30 ...
Page 32: ...Rev November 20 2006 32 ...
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