My rigger is coming tomorrow to put in the new backstay! Opinions needed now, thanks in advance.
I am a newbee to marine
and ham SSB
, but have a ham General License
, and I am a used-to-be electrical engineer
. I am preparing my vessel for offshore
and need voice and data SSB
. US East Coast
, Atlantic, and Caribbean
destinations. I am replacing my backstay tomorrow, and have the option to make the insulated part up to ~56 ft (17 m), or arbitrarily shorter. This includes to GTO wire length from the tuner in the aft lazerette.
The quarter wave resonant freq should be 4.4 MHz w 56 ft, slightly above the 80 meter ham and 4 MHz Marine bands. My tuner docs warn not to transmit on the half wavelength frequency (8.8 Mz) to avoid output stage damage to the rig - makes sense.
At 56 ft, I should be able to tune and Tx on Marine SSB 4, 12, and 22 MHz, and Ham 80, 30, 20, 15, and maybe 10 meters.
I will not be able to Tx on Marine SSB bands 8, 16, 18, or 25 Mhz or Ham 40, 17, or 12 meter. I hope I can Rx these to some degree.
Iffy for Tx are are Marine band 6 MHz and 60 and 10 meter Ham.
WHERE THE TRAFFIC IS: I note that the Marine 8 MHz has the most nets, followed by Marine 6 MHz, and Ham 40 meters. The most Winlink gateways are on 40 meters. I will not be able to Tx to any of these.
DECISON: I am screwing up with such a long antenna
? I could shorten it to, for example, 34 ft, centered in the 40 meter Ham band, and be able to Tx on Marine 6 MHz and 8 MHz.
I would lose Tx-ing on the 80, 20, and 10 meter Ham bands, and lose Marine bands 4, 6, 12, and 25 MHz. These have a lot of nets and Winlink gateways also.
Voice of Experience would be very welcome. Thx in advance.