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Dual Triode, I think. It was wonderful to work with vacuum tube electronics. (You brits referred to them as Valves; a term I prefer) Most of you young furs have not likely had chance to use these, except if you use a good guitar amplifier. Anyways, their eerie glow and warm heat have always drawn me to radio, music and science.
I made this picture a few years ago - it is staged. Most often, this functional glow was hidden away under or in back of the speakers and dials. However, this is a beautiful look at our past tech. Can any of you younger furs tell me about this? I'd love to hear your view.
I made this picture a few years ago - it is staged. Most often, this functional glow was hidden away under or in back of the speakers and dials. However, this is a beautiful look at our past tech. Can any of you younger furs tell me about this? I'd love to hear your view.
Category Photography / Miscellaneous
Species Unspecified / Any
Size 1164 x 1280px
File Size 118.8 kB
Ah, those were so much fun to work with! Wuffy's first set of equipment was full of those little glowing things. But they sure had their share of "peculiarities" that most electronics techs these days wouldn't recognize. For example, when was the last time an IC went "Microphonic"? *grins* Or "Gassy"?
microphonic? gassy? Oh mai. You sir are a wuff I can relate to! Ya know? I 'rebuilded' my 1967 Fender Princeton amp chassis about 3 years ago. New (roosian-made) 6V6 finals. New caps. and a coupla new final stage resistors. Before the rebuild there was a really microphonic 12AX7 preamp tube. I could take a chinese chopstick and touch the glass tube, lodge the other end of the stick in my mouth and that acteed as a microphone. Not well but it worked. Strange, but true.
Normally there's a pretty good tube cross reference at http://www.nostalgiaair.org/Tubes/ but it's down right now due to a hard drive crash.
I'm definitely not from the tube era, but I managed to get a Hammond organ for free and a Leslie speaker for a couple hundred bucks, so I play around with them a bit. The Leslie was making some noises that it shouldn't have, and the chopstick method determined the 6L6 tubes were microphonic. The tubes I used to replace them (new JJ ones from Slovakia-- replacing them with the same GE "clear top" tubes would've been rather expensive) exhibit fluorescence-- they glow blue right on the inside surface of the glass. It's a very neat looking effect, and unlike the hazy blue glow from a gas leak it isn't detrimental to the performance of the tubes.
I'm definitely not from the tube era, but I managed to get a Hammond organ for free and a Leslie speaker for a couple hundred bucks, so I play around with them a bit. The Leslie was making some noises that it shouldn't have, and the chopstick method determined the 6L6 tubes were microphonic. The tubes I used to replace them (new JJ ones from Slovakia-- replacing them with the same GE "clear top" tubes would've been rather expensive) exhibit fluorescence-- they glow blue right on the inside surface of the glass. It's a very neat looking effect, and unlike the hazy blue glow from a gas leak it isn't detrimental to the performance of the tubes.
Oh yes, I remember these 4 sure ... my very first stereo amp had tubes, valves if you will, in it and our TV's as well, it had 347 knobs on it of which only 3 worked, that was back when you had to get up off the couch to change the channel or the volume, my am, small as it was, had great sound to it. SB.
Hee Hee... I grew up with tubes, relays, transistors and selenium rectifiers. I used to enjoy taking apart old tube TV sets in the 70's and overamping capacitors just to hear them pop. Unfortunately, I never learned the basics of electronics and I couldn't even build a simple radio receiver if I needed to. I guess I got too "Lazy" working with integrated circuits. I must confess though, I've found some interesting looking "Greebles" for my scratch built models from the insides of burned out tubes.
My first stereo had 4, 7868s outputs in push pull, with 4, 12ax7s, Fisher. Have tube tvs from the 40's to 70's, tube cbs, browning cbs, used a tube HealthKit in the 55 Pontiac, Robyn t240d in a few cars, wire recorders, tube reel to reels, radios back to the early 20's, transoceanics, phonographs, record recorders, 1950's all tube Dage cctv camera and monitor, my 2nd oscilloscope Tektronix 545, still have the old Dumont. have been working on tube equipment since the mid 80's, have built tube amps, etc. repaired a few Wurlitzer amps 30's and 40's, tvs philco predictas are not fun, 1958 zenith with space command remote, car radios back to the 30's, I think the last wonderbar I repaired was for a 58 corvette, 8fq7 is a twin triode most likely from a 60's or 70's tv. Have a Gap-R module with box (part for a tube computer)
Been around tube stuff my whole life.
Been around tube stuff my whole life.
I'd love to see the Dage TV camera. Back in the 60's the public school system here had a Bell System operated educational CCTV system. On a studio open house tour, I remember the cameras they used were by today's standards huge. (Like a large beer cooler! ) They were Dage, and maybe RCA's too.
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