If you are trying to use the model 217 (a 9 MHz filter) in the 6.3 MHz IF (the PBT board) it is not going to work. I don't know the Corsair well enough to say for certain, but if it is like the early
Hi Joe, I have not seen the problem you describe. I have perused the local oscillator scheme of the Omni VI enough that I think I can make some good guesses about what is happening. The Omni VI has a
Hi Gerry, <SNIP> Actually the synthesizer is up in the 450 to 500 MHz region for better phase noise and then divided down to 5 to 5.5 MHz where its used alone for 80 and 20 and mixed with a crystal f
Hi Mike, I have noticed that most, if not all, of the crystals in Ten-Tec filters have colored markings on them that appear to have been made with a felt tipped pen. My theory is that someone at the
superseded after the Korean War by the similarly-powered Barker & Williamson T368 (Eimac 4-250 tetrode in final amp). And a pair of 4-125 in push pull to modulate the 4-250. It was fully band-switche
Well, yes I know you can bias 833 to operate as a linear amp. I just don't know whether this particular unit had a setting for that. I got the impression that it was primarily a class C, CW or FSK un
I have a Hercules II and a 9420 power supply. I have never operated it using any other power supply. I also have a SGC SG-500 amplifier, which has very similar current requirements. I have powered th
The Herc II will hit rated power with less than 70A. That suggests a single Astron rated for 70A should work just fine. Maybe so. The number in print in my Hercules II manual is 80 Amperes. Just bewa
I've learned to translate "As Is" to mean : It doesn't work, it never has worked and it never will work. There is also the description "worked great last time I used it", which can mean "I haven't us
Some BC-610s were made by Hallicrafters. There was at least one other manufacturer, I think it was Barker and Williamson. There may have been others too. One version had round corners and the other h
B&W made the antenna tuner for the BC-610. According to Jack Williamson it was the BC-939. But they didn't build any BC-610's. Even so, I'm pretty sure that Hallicrafters was not the only manufacture
a complete mobile/portable RTTY station which consisted of a BC-610, a Hammarlund Super Pro receiver... All of this equipment was mounted in a van on the rear of a 2 1/2 ton truck. The truck towed a
Hi Rich, I don't have an answer to your question, just more questions. I have never had any trouble with my 425. I have used it mostly on 160 meters. A friend has a Amp Supply LK-550 which burned up
Hi John, I recommend Home Power Magazine. If you can find someone who subscribes, who would let you borrow a bunch of issues, or a library that has it, you can learn plenty about these kinds of syste
I'm seeing voltages at the RX ANT jack that are 1/1000 of the ANTENNA output voltage on 80 and 40 meters, and only 1/165 at 10 meters. These tests were made using a 50-ohm dummy load connected to the
Mismatches in probe compensation won't affect taking ratios, but might affect absolute voltages on the receiver port. Yep, that's why I asked whether all his measurements were above the noise floor o
What transceiver are you using it with and how do you have the keying hooked up? If you are using a Ten-Tec transceiver (most models) and have the full keying loop connected and enabled, it would be
Be careful how you use silicone goop. At least some varieties include acetic acid (that is why they smell like vinegar) which instead of protecting your goodies from corrosion, will give corrosion a