It looks to me like one group of IM3 products will be mostly OK, except carrier offset causes a gap. That group will miss close-spaced mixing of IM3 products however, so it is incomplete. One group
No. It is not the same. The filter is offset from the carrier in both the transmitter and the receiver, and you will miss the close-spaced high audio frequency tones that would be in the clear if yo
1.) The passband of the filter is 3000Hz. 2.) The offset is 300Hz from the carrier. 3.) The sideband switch now moves the start of the receiver filter 600Hz lower than the start of the transmitter f
When did mass = heat transfer? Dissipation is the ability to get rid of energy, in this case transfer heat from one place to another. Mass is the property of matter that indicates an object's resist
Hi Gary, Why worry about precise repeatability with a rough test? We know now the test initially claimed to measure IM average power ratios measures something near peak power, misses some of the thir
To try and help everyone understand what it does and what it cannot do and how it works. Who's going measure the dynamic range of various radios using S meter movement? 73 Tom ______________________
That's what I'm doing. Not any meter I've seen. They almost always work from the AGC. The AGC is generally a peak detection system with rapid attack and slow decay, with the exception that a good we
You took that wrong. My point is we should learn what it does and call it what it actually is. I didn't say from a receiver with good IM response but a lot of unusual things can happen. Receivers ca
Black or dark colors aid in infrared exchanges in both directions. This is why thermos jugs or bottles are the same shiny clear surface no matter when used for hot or cold liquids and heat exchanger
Yes. No sweat at all. When you do that with at least one pair of windings in series there is no reason at all to worry about equalizing so one rectifier set is OK. 73 Tom ___________________________
When using a grounded CT, you give up supply regulation compared to paralleling the windings. So I would not use that method, it wastes transformer copper since for 50% of the total on time one wind
I think the problem of directly paralleling identical transformers is highly exaggerated. My guess is the paranoia comes from people who assume few percent turns difference will somehow behave like
My example was wrong,. That should have been "added about 1.25 watts maxmum heat to each transformer", not 2.5 watts. That should have been about 25% more heat added from a 5% voltage error in this e
If that is an original transformer, the meter is off. There is nothing that can make the HV actually be 3000 volts at idle without also causing a lot of heat and smoke. There is normally about 10% v
We should all hope no one would ever increase bias on the tube in a linear amplifier in order to reduce power gain! That would certainly be bad news. 73 Tom _________________________________________
No commercial manufacturer using common sense would use a tube that doesn't come from a current production source. It's asking for problems. Look at the mess Ten Tec got into with 4CX1600's. 73 Tom
The way we increase regulation is to lower ESR of the supply or provide a closed loop regulator. Since that supply regulates power, it might be workable to move the power sample input to a voltage di
Mike, You are into a statistical thing. While some people like to pretend some sinister single event causes problems like this, the truth is tubes are very difficult to build. As a consequence there
No. If you calculate the amount of magnetic force produced by current, you'll see that force for something the size of a filament helice is on the order of a few grams from a dozen amperes of curren