I think few US amateurs know that the maximum power output on 30 meters (10 MHz) is only 200 watts. There have been many questions here from US amateurs about amplifiers for 30 meters. And I can't un
You have to know the value of the cap to know what the current value is. 7 amps at 420 volts for what value of capacitance? My guess this is for the entire load cap that you have. What is the RF curr
"The CQ Magazine review in 1970 stated that with higher drive up to 300 watts p.e.p., the amp could be pushed to 3000 p.e.p. input without flattopping" Sure they can! No wonder they are the love of t
Does he have ALC hooked up? -- _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
You really only need 2 relays. One for one side of the AC line and one to short out the step start resistor on the other. There is voltage drop through those relays. About 1.4 volts as I remember. An
Well that depends on how you are energizing them. I'm using the WD7S control board and he uses a simple open collector (active low) to energize the relay. The other side of the relay will have +24 VD
A Cantana is a very poor dummy load. Especially when it gets hot from 1500 watts at high duty cycle. It drifts horribly! Try it on the antenna or better quality load. 10 and 15 are pretty dead these
I think you have an intermittently shorted tube. This is why your old filament transformer smoked. There is a reason for re-wiring the antenna relay to keep from burning up the filament transformer.
Is this turning into the MSDS forum? Just wondering.... 73 Jim W7RY -- _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listin
Its a Motorola UHF amplifier. Uses 2ea 4CX250s. The SP number on it indicates a Special Product or Special Production item. Most SPs were for the government or military. It is part of a 250 watt UHF
Simply replace the motor only. Should be available at WW Grainger. www.grainger.com . Sorry, don't know which motor it is. 73 Jim W7RY -- _______________________________________________ Amps mailing
The Titan fan motor is a small C frame motor. If you do a search on C frame motor on the Grainger site, you'll see 73 different types. Surely you'll find one that will fit. 73 Jim W7RY -- ___________
I tried this in my pair of 3CX800 amplifier. Didn't like it. SWR would not go low enough. I was using a 1ft cable between the output of the tuner and the cathode. If you notice Jerry W8ZR has the tun
What is this transformer's history? Where did it come from? What was it used for? Some sort of intermittent duty type of device like an industrial welder or similar? Is it really 240 volt primary? Ho
As stated before, you need to do some reading. The old Bill Orr handbooks AKA Editors and Engineers Handbook (check EBay) and the ARRL handbooks are a great source. I think you need to build your lib
Are these for tune or loading padders? If not what function will they serve? 73 Jim W7RY -- _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesti
Mouser has them. I've ordered them from them before. 73 Jim W7RY -- _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/
McCunes instrument in Spokane WA will repair meters. There on the web. http://mccunes.com/ 73 Jim W7RY -- _______________________________________________ Amps mailing list Amps@contesting.com http://