Quote:
Originally Posted by vortalexfan
Well I've made some progress with this radio, I've got most of the exposed paper caps replaced, except for 3 of them, of which one of them was an oddball value cap that was rated at .00125 MFD, and the other one which was a .05 MFD with a 300 Ohm Wirewound resistor in paralell with it which I'm leaving alone and then a .10 MFD 600 VDC Capacitor that was added later on by a repairman that was tied into one of the bakelite caps.
I also figured out my low volume issue with the audio on my radio, someone at some point in time subbed out the 37 tube with an 84/6Z4 rectifier tube, which I'm not sure how someone would of thought that using a full wave rectifier tube in place of a triode tube would of ever worked especially in a AVC/Detector circuit...    |
If the triode was being used purely as a detector a diode with the right pinout will work....I had an Admiral with a type 76 triode detector that sometime in the 50s someone replaced the tube with a 5 pin base with a 1N34 soldered into the base....It worked fine like that and probably saved someone a week waiting for a tube to ship in.
Then again I've also seen dummies assume if the tube plugs in that it has to work... I forget the name but I had a 20s console that the owner who is a collector decided to plug a pair of type 80s into the output triode sockets.... and he wondered why it hummed so loud you could hear it down the block!...it used an odd ball triode type that was unobtainable so after consulting some datasheets I found IIRC the 6S4 was close enough (main difference was slightly better gain) and built plug in adapters for those. That set had GREAT volume after that. That set had a reputation for having powerful audio for a 20s set, but the guy that gave it to me (and later began to miss it and bought it back) who had a working table model version was even impressed with how loud and clear it ran.