I wonder if there are archived anywhere some actual films of an old GE, Mullard, Philco, RCA, Amperex, etc tube making process. Some inside documentary or training film, that could be found and poste
Back in the day 10,000 would have been a small run of one type. Non-amp related trivia, but I wonder what was the most manufactured tube number? 12 or 6AU6, 12AX7, 5U4 etc? Randy AB9GO They must have
Probably one of the AA-5 type at a guess, every house had at least one and the same 12AT6/AV6, 12BA6, 12BE6 was used in auto radios 1953 to 56-57 or so. The 6AU6 is also a good possibility as early T
I don't have the spec. sheet right in front of me but I recall the 833 could put out a hell of a lot of power with no forced air cooling. 600 w. (but I forget what biasing) sticks in my mind but don'
Add that they're not good in linear service (think Class-C), as I understand it. They _are_ most interesting in appearance. -- Mike Andrews, W5EGO mikea@mikea.ath.cx Tired old sysadmin ______________
It runs out of steam above 20M and up plus it really should have some forced air when pushing at ICAS ratings, seal ratings are only 145*C. Its a fine AM tube but rather useless in GG SSB as its pret
They sure do look cool though! It runs out of steam above 20M and up plus it really should have some forced air when pushing at ICAS ratings, seal ratings are only 145*C. Its a fine AM tube but rathe
The 833s I saw years ago in their transmitter cabinets, at an AM broadcast station had no chimneys or ducts to cool them just a lot of general blower air around them. The mounts were also very simple
Oh, okay I didn't know all that. it would work for me on AM since I typically operate only on 40 75 and 160 and I could run with a blg slow blower. Except that I have so much hardware now for 4-1000A
The 833A is a rather versatile tube with power output varying over a wide range. Forced air cooling increases the plate dissipation from 300 to 400 watts. Mainly to get much power out you do need to
And low dissipation. Without forced air they rated at 300 Watts and are only good for 150 to 200 watts output per tube in class B. That's probably what pushed the price up to unrealistic levels. Last
Cheap? Have you seen what they are going for lately? As for pulls I doubt there are many still in use. The price increase is worse than "black plate" 6L6s. 73 Roger (K8RI) ___________________________
Thats Class B AM Linear Roger and per tube. A SB-220 can barely run 250W out that way in old buzzard style AM. Carl KM1H _______________________________________________ Amps mailing list Amps@contest
Yes, the GU81M is somewhat legendary amongst the Eastern European crowd. I'm told that they withstand more abuse than an old Land Rover and keep going long after conventional wisdom indicates that
Rolling your own vacuum tubes: http://videosift.com/video/How-to-Make-Your-Own-Vacuum-Tubes Mike, W1NR _______________________________________________ Amps mailing list Amps@contesting.com http://lis
Don't know of any US but try this http://www.youtube.com/watch?v=VV7cimRWah0 and http://www.youtube.com/watch?v=HveUY7eivfI&feature=related both are multipart On Mon, Aug 30, 2010 at 7:20 AM, Patrick
ORIGINAL MESSAGE: REPLY: My feelings exactly and that's what prompted me to ask the question in the first place. To me, a 12AX7 would be much harder to build than an 8877. As others have pointed out,
ORIGINAL MESSAGE: REPLY: Fascinating, thanks! 73, Bill W6WRT _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
I was asked to send this to the reflector so here 'tis. Maybe it will bring an old tube maker out of the woods to refresh my memory. Sometime in the late 50's or early 60's I was in a Ham club in Cin
Working on Magnavox TVs, one side of my caddy was all 6GH8 and the other side was all the other tubes. Magnavox would use 7 or 8 of these in one tv. Most of them run almost to or into saturation. Sur