Chas, Different strokes for different folks, as it goes. I can see the apeal to a guy who likes the Heath boxes, has a few bucks, wants to be able to say he built it himself, and wants a pristine OEM
Jim, My question is to the fundamental accuracy of the MFJ vs. the effects on calibration variation. Is the MFJ really this inaccurate, or is the accuracy in your case atypical. It would be interesti
Chuck, No matter what, you should be given exceptionally high marks for the many pics. I'm not sure I've seen an amp listed that had so much photography. Good luck. 73/jeff/ac0c _____________________
Plenty of youtube videos out there. Some guys mentioning 75KW. I could not believe it after seeing some of Carl's comments on the broken crankshafts - but it does seem to be true. Strange but true!!!
Bill, I agree with you for the real case. But to say by definition there can't be swr - I think that would only be the case with infinitely small source and loads and zero spacing between. So that fo
Bill, There has to exist, at a minimum, a DC blocking cap of some kind. I may have missed some part of the conversation but I would guess that must be the case... Of course, after looking at bigradio
I think that 4-tube SB220 guy's QTH is about 15 minutes from my house. Wonder if he would show & tell... 73/jeff/ac0c _______________________________________________ Amps mailing list Amps@contesting
Dick, The text mentions 950V @ 0.750 per secondary (uses the word each). So it seems to me that the guy is saying that means, series connected secondaries should yield 1980V RMS @ 0.75A based on the
Hsu, I have low 30's on my SB200 2xGI7B. That's on 20m, with pi-net inputs and tank Q in the 8-10 range, and about 2500V on the plates. It's been a long time since I tested it but that's what I remem
Jim, Did the esteemed author of that series happen to voice an opinion as to what would be the "best of all possible worlds for ham service?" Now that would be an interesting discussion. 73/jeff/ac0c
I figured a bunch of amp crazy homebrewers may have a basket of other goodies to complete the bench. If you have an extra 355D that you need to find a new home for, contact me off list. 73/jeff/ac0c
Carl, If you don't mind, I want to jump on the soapbox here and mention something. In discussions with hams on transmitted spectral purity, I keep hearing "I don't have a SA" and "SA is an expensive
Larry, You are 100% right if an absolute accurate measurement is needed. But if you simply want to know if you are in the 20's or the 30's, then the method I describe is fully adequate to the task. I
Martin, There are 2 ways to look at this. If you look at it from a "is this the official lab-standard proper way" standpoint, it comes up a loser. I'm not suggesting it is. And If you look at it from
Jim, I think he means the semi-break in hang time at the end. But his sequence sounds ok to me. 30 ms up front should allow for even the most slow relay cycling and setting times. 73/jeff/ac0c ______
If you have a few you want to find a new home for, please contact me off list. 73/jeff/ac0c _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesti
In addition to what Bill is suggesting, depending on accessibility to the tube, you may be able to use an IR thermometer to look at the tube that way. These things are pretty cheap now and while you