Bob:
I'm guessing that the voltage on the 20M director is due to QRO
operation on 160M. I recall reading an email from Natan, or at least he was
mentioned as the originator of the advice, here on TT maybe 15 years ago
that the C31XR antenna could have all the parasitic elements shorted to
Hi BoB,
be careful with the c31xr as the 20m reflector is on the far end. maximum
voltage present there and
mine burned down at the isolator while my freestanding tower (24m) with
c31xr and 5m higher a 40cd2 40m 2element beam
where shuntfed on 160m.
Best way is to ground the element or look
Am very happy to report that 160 meters sounded like the good old days last
night with a solid opening to Europe. SM5EDX acted like the beacon and was
heard for well over an hour with signals peaking 579. HA8LNN, Zoli, who I
have never worked before on topband also had a good signal - peaking
I have used NEC4 to model my short 50 ft tower for shunt feed on 160,
80, and 40 meters. It has a small triband beam with all elements
grounded. The 160m shunt wire goes to the top, of course, and NEC gave
a good estimate of the impedance. On 80m, my first guess was pretty
close to 50 Ohms.
Looking for some shunt feed wisdom from the list. Trying to shunt feed 25G
tower ( 8-10ft sticks, 8ft flat top, base 18" out of the ground = total tower
89.5 ft) has a F12 C31XR just above the thrust bearing (@90ft) with 6ft 2" mast
above the tribander with a F12 D140 dipole (@96ft). Based on
Hello
How can I control remotely a TFS4 box to switch between four antennas?
It dont have USB or RS232 port, so maybe it is not possible?
thanks!
--
73,
Jorge
CX6VM/CW5W
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