Ain't it the truth though, I guess they could even take requests =). In what I was explaining to Ed, I did mess up a bit, I should have said "modulated carrier" when I was speaking about how they rat
Rob, I think, but may be wrong, that Rich was referring to those hand held IR temperature meters. Some even show a negative image on a small display of what they're being pointed at with the hot spot
Will miracles never cease! I never thought I would see the day a Fluke instrument would be that cheap. I figured that being a Fluke would have been $350 to $450 dollars. Thanks for the info on this R
Hal, When I spec a transformer for any amp and assuming it's for AM-CW service along with SSB, I figure the current and voltage that will be needed to sustain the peak power when tuned correctly at 5
I was trying out the PI calculator (Pi Network 1.0) written by Jim Hawkins WA2WHV and can't figure something out. When using the calculator, any plate impedance above about 1350 ohms will not keep a
I thought about this when I was looking at the instrument but figure Fluke would have taken this into account. Measuring air flow temperature, I use a small pocket held stem thermometer that us used
Rich, Yes on the coil, you can't get a true temperature down deep inside the windings but heat will be dissipated by the coil itself. It should be different than the core temp because of the insulati
Marv, On a glass tube, there would be one way of calculating the anode temp by the color it glows at. Knowing the temp characteristics of the anode material, the color is dependent upon temperature.
Colin, Probably who give um the idea was the guy who invented using the home wiring for an antenna, you reckon? LOLOL =) What next, spark transmitters? Perhaps we can wait until BPL is fully implemen
Dale, and everyone else on the reflector, I would like to hear a debate about using so called speech processors. To my understanding, they're just an amp running almost wide open with clipping. The m
Rob and Gary, Correct, that's why I mentioned earlier the plate transformer needs to be designed to handle at least 100% of the power that the carrier creates. If the transformer is sized to supply 5
A good while back, on a discussion about gapping cores in transformers, I forget with who, I found this info today that may be interesting. Below is a quote from Magnetics, inc., Div. of Spang & Co.;
Shame they didn't add stuff from the 60's and 70's too. The 70's had some really good amps. I'd like to see them publish one with every amp design in the handbooks and QST from 1940 vintage on up to
Hal, That's a big bummer! The only things that could have happened are two. They had the leads mis-labeled or there was a nick or something on the primaries winding causing a short. If it was hooked
Jason, There are several publications and books that have what you want. For a couple of 3-500Z's, Eimac had a full schematic and parts list in the back of the tube spec sheet. That amp has been copi
Carlos, There have not been any "real" tube testers made for broadcasting and amateur tubes. they were some commercial, industrial and military ones though. I'm not sure if the military ones you can
Hal, You sure you don't have Gremlins? No, the transformer should not have done that. Even if it were out of phase, it should have just maid a loud moan, and then after a few seconds, tripped a break
Hal, If I recall, this was a heater transformer wasn't it, not the plate transformer? Before you send it back, let me know what the core is (C-Core or EI) and the measurements of the core, width, hei
Simple, Determine the voltage across the 50 ohm load from the power in watts. Then use a load capacitor with a voltage rating equal to or up to two times the load voltage. The tune control is two tim
Rich, Exactly. I talked to the owner of Oren Elliot (Orens son Stephen) several years ago about this and what he thought the rating should be. He had several thoughts on this but told me that most we