Well, we made QSOS, so it was not lossy configuration but the nature of larger than wavelength loops used on harmonic bands. (Double Zepps have this same characteristic when used on harmonics). What
Duffy, I kind of think your tone of voice might have told TT that you would not have been happy with the non TCXO radio. After all, you were waiting kind of late to order any one for your vacation. W
Bob, most of us that I know always check stock availability with ALL vendors these days! Actually, last month I decided I wanted an Argo for Field Day. I was willing, indeed wanted, to save some mone
The Giovanni site provides several magazine reviews. The one that counts is noted antenna modeler and experimenter L. B. Cebik's, W4RNL. L. B. tells it like it is, "a very small SWL antenna" for all
Ken, About your tuner, it does have the cable RF choke like the original paper shows? Although not a "balun", that does choke off RF current from the outside of the shield of the input coaxial connec
Interesting George about Roy and the solenoid choke. The only thing I had read on his web site recently was his retraction of saying the input BALUN was superior to an output side balun. His most rec
The Johnson Match boxes had a range of operation, but were unexcelled within that range of impedances that they would match. One improvement I have seen is to add a variable capacitor in series with
Likely with the amount of adjustment he has for the loop, it would also work for doublet of 135 feet. I know I measured about the same complex impedance on a 1050 foot loop and on a Double Zepp of 15
That was an RCA number I believe. You might check the NTE web site, or other replacement semiconductor lines. There are also some companies that picked up masks and dies for obsoleted American Semico
Also, any dual gated N channel FET with similar ratings for voltage, current and frequency should work. Compare specs if you can locate its data sheet. 73, Stuart K5KVH
In testing plastics, just make sure the sample is not a quarter wave long at the microwave oven frequency, or you will have a worst case test for heating. A small sample well under resonant lengths i
No, you piggyback the clip leads spaced apart onto bare wire of the parallel line on one side. ie clip, wire lead, bulb, wire lead, clip. Start with clips say a foot apart. You may have to experiment
The value of dielectric constant for most plastics is well known and not necessary to an approximation of the physical quarter wave length of a piece of tubing. The DE will only shift the resonance s
Insulators or coil forms which are not getting hot at 80m do not need to be microwave tested, as long as they are equally cool at 10m. After all, the exact frequency application is the over riding te
Pete, and the group; good comments on coupling capacitively or inductively to insulated parallel line, and on the choice of lower current bulb for lower power rigs like Argonaut V. Thanks, Stuart K5K
Gene, N0MQ, The reflector suppresses your direct email adr, so I am replying thru the reflector. Your post got to the list; not sure why you cannot post others? Here is the source of instructions for
Noted Antenna authority and modeler, L. B. Cebik notes that the end fed Zepp, with ladder line feeder, (balanced line), shows only 10 per cent imbalance for this extreme end fed case where one side o