Any discussion of a 32V rig is going to be far more interesting than anything having to do with a RF amp. Rob K5UJ _______________________________________________ Amps mailing list Amps@contesting.co
see, wat did I tell U, sounds interesting Rob _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
If I were homebrewing an amp I would not even bother with electrolytics; I'd use one or more oil caps to get 40 uF and call it a day. If the power supply is to supply a fairly static load, I'd use a
not sure what your application is but these type doorknobs have worked well for me in an unbalanced tuner on 160 m. albeit with the caps shunting to ground: http://www.ebay.com/itm/1000pF-12kV-Russia
if you really want to "baby" an amp assuming you already know how to operate it, use more than barely enough cooling, watch the filament voltage, and blow it out periodically. Oil the fans if they ta
Those are very expensive. Go look around on-line or at hamfests for carborundum resistors. Try to find four around 200 ohms each. If they are around 18 inches long or so and 1 inch diameter each will
Didn't know that. I always figured the AL-80s were simply over driven so the Ip went way over 400 ma. I have heard of owners having to get a new tube every 3 years or so. What is the stock fil. v.? t
I'm having a hard time believing 3-500 filaments are stressed all that much. I'd be more interested in metering the fil. voltage and being able to adjust it. I know of no commercially manufactured ha
I have seen Carborundum DL "kits" (four resistors, clip bars to hold them) at fests for $50 or less. I purchased a used broadcast tx DL kit of four or five resistors last year for $20. Not everyone h
I wondered about that. I'll see what happens when I sweep it. It'll be interesting. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/m
The thinking must be hams need plenty of reasons to keep buying tubes. And the meter + rheostat or variac takes space and costs $$$. Rob K5UJ _______________________________________________ Amps mail
What's the total value of the bypass caps in the 77Dx? tnx rob K5UJ _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/
work up some kind of plastic fork wand thing a few feet long for holding the IR thermometer close to the choke or just tape it to a length of PVC. thanks for the cap information. 73 Rob K5UJ ________
I've looked at some pictures of that model. how much does it weigh? Rob K5UJ _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/
Bob put digital in single quotes like this: 'digital' the meaning was not that there is literally such a thing as a digital antenna in the technical sense but rather that some antennas do better than
ABC Chicago stuck with channel 7 virtual and real which turned out to be a big mistake. One problem was that there was another station on 7 in Grand Rapids MI. They are still on 7 but also they are o
I stick with porcelain or glass because if you are outside soldering with a torch anything else may melt. 73 rob K5UJ _______________________________________________ Amps mailing list Amps@contesting
Have not done it myself but I have heard of other hams using them for that. you just need enough current to measure a tiny amount near the breakdown potential, at which point you back off on the v. r
What did Collins do with the 30S-1? Rob K5UJ _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
You don't even need that. all this 50 emails on this topic is due to obsession with little ceramic tubes. If everyone ran cathode driven 2 or 3 x 3-500, 3-1000, 4-1000A this problem would go away. 73