There is such a device and it is frequently used in VHF/UHF systems. It's called a sequencer. I don't know if anyone has ever adapted them for HF, but what it essentially does is prevent the radio fr
He won't do it. He'll refer you to Wes' measurements and say that a piece of HP equipment doesn't lie. Yet, I know for a fact that measurements can be interpreted in a variety of ways. Figures lie an
We also do not know where the oscillation is occurring. Is it in the VHF range? HF? LF? All that's important, because if the oscillation is in the HF or LF frequency ranges, screwing with the VHF par
These R-C networks on the filaments do help. They stopped an oscillation for my amplifier. One person suggested though that they may have helped to stop an LF or HF oscillation rather than a VHF one.
So Dave, Since you "really know" as you point out below, why not dispense with belly-aching about the rest of us ignorant bastards and actually teach us something so that we won't be so pathetic? Wha
Tom, That's a great point. So far Dave has just told us we are all wrong. I can't wait to actually learn some of the knowledge and wisdom he has stored up. It will be a day of great learning for me w
Sounds like good articles! W/o having read them, I'll confess that I am at a loss to know the back ground. What is the debate? Also, generally when determining a conjugate match, S-Parameters are use
George, Even that doesn't work. I have a degree from one of the top EE schools in the world - University of Illinois. Specialty was RF. I also spent 6 1/2 years designing Microwave radios and cellula
OK. You are correct Rich. If conjugate match occurs, then an equal amount of power is absorbed by both source and load - hence the 50% efficiency. Conjugate match IS what is needed for maximum power
Oh, Rich, I am not. In fact, I'm not even talking about being an expert here. I've never used the word with regards to myself, you, Tom or anyone else. My point is that Dave, WT8R, has done nothing b
One "side" affect is from laughing so hard at your drivel that my stomach aches! I think the original question to explain "side" effects (and it should be effects not affects) revolved around my anal
I doubt you could cool a 4-1000A or 3-1000A by blowing air across the side of the tube. 73, Jon NA9D -- Jon Ogden NA9D (ex: KE9NA) Member: ARRL, AMSAT, DXCC, NRA http://www.qsl.net/ke9na "A life live
Problem with my DSL line last night caused it. I suppose you could, Rich. However, that would get to be a fairly large fan given the size of a 4-1000 or 3-1000. By that time, it's probably easier to
Perhaps I don't, Rich. And perhaps I am full of BS. But I prefer cooling systems that work in the direction of natural convection of heat. Heat flows up. So something that blows cool air over somethi
Also, some people have said that centrifugal blowers are hard to find. I see numerous blowers at every hamfest I go to. They aren't that rare. Yet I've never seen a muffin fan as big or bigger than a
Conjugate matching is not required for unconditional stability. That's incorrect. Many low noise amplifiers are purposely mismatched because simultaneous conjugate match generally does not equal mini
A simultaneous conjugate match is unconditionally stable. However, any other match may be unconditionally stable as well. Unconditional stability is not just so simple as defining a match at one freq
Rich, Your name is coming across as "2" Are you wishing to hide your identity? Jon -- Jon Ogden NA9D (ex: KE9NA) Member: ARRL, AMSAT, DXCC, NRA http://www.qsl.net/ke9na "A life lived in fear is a lif
After noodling all of the ideas tossed back and forth regarding conjugate matching and efficiency, I have come up with the following simplifications to try to clarify the idea. If there are any error
Hi Billy, I've been trying long and hard to come up with a "scientific" answer to your point and have been consulting with others as well as noodling it around in my head. Let's see how this works. I