Home |
Search |
Today's Posts |
|
#1
|
|||
|
|||
Michael,
Well - he said (in a subsequent post) that it had a transformer and electrolytic. I surmise from that he has DC running around somewhere since it apparently generates a signal. All one would need to do is trace the voltage from the secondary to the elusive rectifier. Or one should find DC across the electrolytic and be able to trace back towards the transformer from there. I'm sure he'll figure it out. If he has DC - he has a rectifier hidden someplace. If he doesn't - it can't work (as he says). Roger, KL7Q Michael Black wrote in message ... "Roger and Ute Brown" ) writes: Check the tube base wiring against the 6L6 and see if everything goes to the correct pins for such a tube. It's possible you should have a tube which sports a rectifier (diode section) and another tube in the same envelope). At any rate - a part by part inspection resulting in a schematic will tell all! I thought of that myself. While this transmitter is so simple it has to be pretty generic, so there doesn't have to be an article about it, I have seen "single tube" transmitters described in old magazines that used something intended for AC/DC use, ie a power stage with a built in rectifier that used a high filament voltage. I'm thinking 50L6, but I'm not sure if that is right. I don't remember if there was something in an octal package that ran off 117volts directly. I don't think the original poster mentioned if there was a transformer, and somehow I suspect the lack of one would be a greater indicator of this route. Of course, selenium recitifiers may have had a brief enough life that someone might not recognize one by sight. Michael VE2BVW |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Need "Original" (1937 era) 6U5 Tuning Eye Tube | Boatanchors | |||
FA: Homebrew tube transmitter on Ebay | Boatanchors | |||
Tube tester query? | Boatanchors | |||
FS: Old tube sockets, 4, 5, 6, 7 pin, Hammurlund, GR, ceramic, phenolic,matching plugs, extenders | Boatanchors | |||
Directional Radio Transmitter | Antenna |