Hi gang, I have acquired a commercial UHF cavity I would like to use on 70cm. The coaxial resonators as they are, only tune down to 470 MHz or so. Would it be practical to use a dielectric within the
Hi Bob, IMO, The Henry 3K Ultra is a poor example for remote control to follow. I own one of these amplifiers, and it is a pain to tune - unless you use the presets. The problem is the archaic circui
The presets are indeed, easy to use; once set up, and a dream to use. Pity there aren't 50 of them! Even with the suggested initial settings, there is no way (unless you are lucky) to consistently st
Why make one and butcher up a classic? Call Henry Radio for a direct replacement - (310) 820-1234. Or, check RF Parts; parts # 24050: 16 KV PIV per section, 6"l x .75" x .75". Of course, they want $9
That would be like putting a Chevy 350 into a '65 Mustang (or a Ford 390 into a '70 Chevelle 354). It will work, perhaps look OK, but still a 'butcher' job. -J Butcher? You can make one that looks ju
I would. If I had a '32 Ford, it would have the original 8 cylinder flathead. The "deuce" was one of the most popular cars to be hot-rodded. Maybe some people do it because the original parts are not
And a 440 into an old roadster is considered a "custom" job worth far more than the original.<:-)) Says who? A fellow has a restored (with factory parts) Deuce and figures it is worth $125,000. My g
That's how I got into ham radio. Maybe I ought to write a Country and Western song! Merry Christmas, Ward. -J girlfriends left with the guy that had a cool looking pickup truck and a friendly dog :-)
I would expect any 60-70's muscle car brings more money fully stock than modified (unless you are looking to go racing out of the box). BTW, this whole thread started with the question: parts list s
A possible source for high power tubes and cavities is the LPTV (Low Power Television) market. These folks used tetrodes with plate dissipations in the 3-5 KW range (UHF examples are the Burle 9017 a
All along the coax (with SWR > 1:1) the forward and reflected voltage and current components add vectorially. The vector sum of each component (voltage and current) is that of the forward and reflect
The resultant voltage or current is always higher than the incident wave component value Sorry for the error. It should read: The resultant forward voltage or current is always higher than the incide
Hi Folks, Anyone have a schematic for an RF Concepts 2-317? Thanks, -John, N9RF **Ideas to please picky eaters. Watch video on AOL Living. (http://living.aol.com/video/how-to-please-your-picky-eater/
Hi Larry, you wrote:>> information he had there. ** I don't know what happened to Jay's page. Perhaps he has an alias with the ARRL and you can email him. A quick Google came up with _n1rwy_ (mailto:
Thyristors, (both SCR's and Triacs are thyristors) are notoriously noisy and suffer from a poor power factor. Triacs are SCR's back-to-back, and so conduct AC in one package, where an SCR is more lik
Try: _http://www.reference.com/browse/wiki/Ampacity_ (http://www.reference.com/browse/wiki/Ampacity) -John, N9RF **Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.c
You can be sure a numerical method, such as from NEC would be more accurate than any antenna analyser In Free Space. -John, N9RF **Get fantasy football with free live scoring. Sign up for FanHouse Fa
There is nothing from the Government which could make anything valid or acceptable. -John, N9RF _______________________________________________ Amps mailing list Amps@contesting.com http://lists.con
Ultimately, what happened here is your assertion "that because the Government does it, it must be right...". Well, I disagreed with that assertion and said so. My reply was not meant to be a politic
Design of a Yagi is a comprimise of SWR, gain, and F/B as they are interdependent. If you optimize for one, the others will change. For low-band beam, F/B is usually most important, but at the expens