Hey all. I just finished Ten Tec QRP monoband rig and am trying to align
the xmit and rcv, so I am xmitting and rcving on same freq. The manual says
to xmit over a reference signal in a second receiver until the pitch is the
same. I tried that with my Kenwood TS-180S as the signal source, and wound
up being 800 hz away from the Kenwood frequency, even though I zero beat
both transmitters in the second receiver.

Then I tried just using the Kenwood and the Ten Tec, and was able to sync
them alright, and heard both about on freq in the second receiver. But
while I was doing this, I noticed that the Kenwood frequency changes
(according to the display) 800 hz on transmit in CW mode, which just
confused me more.

I know I'm probably being anal about it, and everyone uses his VFO on CW
anyway, so +- 1kc is not a big deal. I was just hoping someone might shed
some light on the subject, so my understanding could improve.



Lee KI6AZS

Hi Lee

I am by no means an expert in this but of course to receive a CW signal
on an SSB receiver one has to set the RX frequency at some difference to
the TX frequency so that you can hear a tone from the radio. With a
800Hz difference that would seem to be the heard tone frequency.

I have also heard that different radio manufacturers use dfferent setups
for displaying their operating frequencies in SSB/CW mode. For SSB some
will show where the carrier "would be" had there been one and others
show the centre of the actual passband. (A SSB signal being about 2.4kHz
wide, thus the difference being 1.2kHz)

From your remarks about the TS-180S I would surmise that Kenwood show
the "carrier" frequency and thus must change between TX and RX in CW mode.

Hope you find this useful

Cheers Bob VK2YQA in W5

Rockinghorse Winner wrote:

I know I'm probably being anal about it, and everyone uses his VFO on CW
anyway, so +- 1kc is not a big deal. I was just hoping someone might shed
some light on the subject, so my understanding could improve.