RadioBanter - View Single Post - WTB: Collins KWM-2A

September 7th 03, 05:56 PM

wrote:
OK, per advice from others in this newsgroup, I am beginning my search
for a good Collins KWM-2A.

snip

Rick originally said he wanted SSB plus c.w. capability.
The KWM-2 is a fine SSB transceiver, but it's c.w.
operation is the pits. It keys an audio oscillator
(about 1.5 KHz)into the mic circuits to generate c.w.,
resulting in "artifacts": the (suppressed) carrier,
and a weak keyed c.w. spur 3 KHz below the main
keyed c.w. output. Unless you have perfect-pitch hearing,
it is impossible to zero beat someone on c.w.
using a KWM-2. Also, there is only the 2.1 KHz wide
mechanical filter, no additional c.w. filter provision.

Lack of RIT (receiver incremental tuning) is another
show-stopper on c.w. You must listen to the other
fellow's signal with a 1.5 KHz tone, if you wish
to be near zero beat. Most ops prefer to listen
to a lower pitch, about 700 Hz.

73,
Ed K4PF