[amsat-bb] Re: new station cn87 and Kenwood TH-F6A
Rogerkola at aol.com
Thu Jan 10 16:14:43 PST 2013
In the early days of satellites, this was a popular way to work CW...
split band with a cw receiver on the downlink and keying an FM rig
(usually on 2 meters) on the uplink. The resulting synthesizer generated
signal tended to "swing" on each element of of a character giving it a
distinct "bird chirp" sound.
QSLs with signal reports of 569 or 559 were common but well accepted as
access to 2 meter CW rigs was somewhat limited.
I'm not sure how today's purists would accept such going's on but with
the limited number of CW artists on the satellites I myself would
readily respond to a chirpy CQ.
My last chirpy CW contact was during a Field Day contest 440 up and
2meters down. We were having no luck on FM and I secured the 100 points
on CW for the club.
On 1/10/2013 6:10 PM, Hector, CO6CBF wrote:
> Hello all!
>> You could always cut off the internal mic and use the PTT as a crude
>> CW key since an on/off keyed unmodulated FM carrier is theoretically
>> identical to a CW signal. I think some people have done this, or at
>> least have contemplated it.
> Yes, it works!! I had my first contact on the analog birds (AO-7A) running
> a modified Yaesu FM transceiver.
> I disconnected the MIC preamplifier circuit, I kept the Tx activated and
> switched the PA drive transistor by a switch circuit added and commanded
> by the CW key. Despite the tone was FMing a bit, I had some contacts.
> Hector, CO6CBF
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