I have always wanted one of these BC receivers because the on I used was given to me by my father. And that was the first Stewart Warner radio I had ever had. I'd have to repaint it. The varsity seri
Years ago I wrote an introduction for a boat anchor list server. And told story about my history. Many found it interesting but it was lengthy. Some of us have old and interesting histories and other
Sounds like they rely on the filter to eliminate the carrier as much as the null adjustments. Or that the filter's input impedance is critical to the carrier's null (unlikely). Either way, it from wh
If they are ladder filters it drift may be mostly due to the quality of capacitors used. 73 Bill wa4lav makes R3 and R4 nulling adjustments critical. << OmniVI is BFO (and passband setting) is drifti
You have left out cross modulation. Cross-modulation is caused by the exact same nonlinearity that creates intermodulation. In that case amplitude modulation from one signal and is added to the signa
The reason why half wave dipoles are half wave length is not for a specific impedance but that they are resonant. Small antennas like the half wave dipole are not effective radiators unless they are
Oh yes if the directors or reflectors are too far off resonance they don't accomplish anything. Just like the elements on a multiband yagi. A 15 meter director can't act as a 10 meter reflector becau
Not quite correct. The driven element is at resonance to maximize radiation but the others are slightly off to either side of resonance so that for phasing purposes. This is so that the induced curre
An interesting point. Has anyone looked at the curriculum of the ARRL's Big Project. I did a word search thru the lab manuals and words such as resonance, resonate,etc are not existent. Resonance is
By the way this is my 30 year as an electrical engineer. I got my ticket in 1961. The problem is many people have simply have stopped asking the questions of why and how things work. They have a grea
I did not say the antenna had to be resonant but the antenna system must be resonant to be effective if the antenna is short. You can make the antenna nearly as small as you want but to match the imp
I see now that the problem is that some of you are caught in an old on going argument between non-resonant antennas and resonant antennas. By the way I have used "wires" and "AO" for years. But not r
AH! This is not an opinion but a well I would like to point out that the reflector and directors in a yagi are resonant. They are slightly off resonance (not at the peak)so that their phase relations
did you try hitting it? That often fixes or makes it worse. 73 Bill wa4lav At 03:24 PM 10/27/2003 -0500, you wrote: Yesterday, when I was using my Pegasus / RX-340 combo (using N4PY software), the to
MTM1N45 is a to3 style case (large metal) 1 amp 450 volt N channel enhancement mode Power MOSFET. Made by Motorola. They are not available anymore in this package. Good for high voltage regulator as
The 8713 is the date code 1987 13th week. Bill I have in my possession several Motorola MTM15N45 which also has a number stamped on the case 8713 which I assume is simple some number which indicates
OOPS read it wrong. MTM15N45 which is a 15 amp 450 volt N channel enhancement mode power MOSFET made by Motorola. It is very difficult to find these in the TO3 style cases now. Mostly replaced by the
The way the Motorola numbers work is that the third letter is M for metal case or P for plastic and the first number is current rateing the following letter is type of channel and the last number is
At 01:11 PM 8/12/2003 -0500, you wrote: Let me get this straight. Charge starts to build, from the earth (you can hear the frying in the guys and tower) unless there is some way to dissipate the stat
A little more about snake oil. About the only thing you can do to control where lightning is going to strike is to attract it, more or less. A lightning rod or one of these dissipation brushes produc