General Electric Vacuum Tube

Question how much is an antique majestic model 90 radio worth?
i have an antique model 90 majestic radio and would like to sell it to free up some garage space and am would like to know its value so i can ask a realistic price. As far as i can tell all the parts are original: cloth lined wires, oil capacitors, and vacuum tubes from General Electric, Sylvania America and RCA (the RCA tube has burned out). also if u could provide a source(s) that i could use to verify the vlaue i would greatly appreciate it, as i have absloutley no idea what it might be worth.

Best Answer Daniel, try these sites: http://www.antiqueradios.com/forums/viewtopic.php?t=58487&view=next&sid=8cdf11b376b937c32bb13a33f185dc6e http://www.thathomesite.com/forums/load/antiques/msg0511304529022.html?2 http://www.worthpoint.com/worthopedia/majestic-console-radio-model-90-b-large-old

Question What could be the source of a constant tapping sound in a tube radio?
I recently purchased a 1935 General Electric A-65 console radio from an antique shop. When I turned it on, it worked (surprisingly) and picked up both the AM and shortwave bands it's designed for, but with subpar sound quality. I have enough footing in electronics to know what I'm doing, so I decided to replace the original capacitors (minus the micas, as I read they stand the test of the time well) and resistors (the resistors had been replaced with these goofy makeshift things in the 60's). Every capacitor corresponds with the correct voltage rating in the schematic, and I even replaced some of the frayed cloth wiring. I thought the radio would be fantastic after all of this, but upon turning it on, all I received was a constant popping noise from the speaker. This noise constantly repeats between half-second intervals. Adjusting the tuner does nothing to this sound- it can only be muted by turning down the volume. I've rechecked the entire chassis 3 times already (VERY tedious work), but everything looks to be in place. Could it be possible that the vacuum tubes (there are six in total) are causing this noise? Four of the six tubes are in black casings, so I can't visibly tell their condition. My only other option is to replace the tubes, but I'd like some input before I go throw around money on dollar tubes. Or could this sound be coming from the capacitors? Tube Stats: 6A8 Converter Oscillator tube (antenna feeds into this, I assume it just amplifies the signal) 6K7 I.F. tube (the "I.F." stage is frequently mentioned in the manual, but I fear this part is over my head) 6H6 Diode Rectifier and Automatic Volume Control tube 6C5 Audio Amplifier tube 6F6 Audio Output tube (it seems to be closely related to 6C5) 5Z4 Rectifier tube (Clear casing, but has a blackened silver burn on side) Basically, if anyone could point where in a radio circuit this popping noise would be generated, it would be very much appreciated. Although it'd be tough to read on a computer screen, here is the manual if you're willing to go that far: http://www.nostalgiaair.org/Pa ... 007755.pdf Thanks! The link above doesn't work. Here's the correct one: http://www.nostalgiaair.org/PagesByModel/755/M0007755.pdf

Best Answer What type of speaker is used is it permanent magnet type of magnetic coil type ? Try to use a normal 4-5 ohms Speaker 1)Did you change main filter capacitor bigger one next to rectifier tube,then 2)Try to substitute rectifier with 2 Diodes (1250v piv 2amps) with 1k 10watts wire wound resistor to control the out put voltage ( try to use variable wire wound resistor to achieve the correct voltage.(Measure the out put DC voltage is it 250-300V) 3) Try main Audio out put Tube circuit any char ed resistance (450ohms with a capacitor ( 10mfd 50v) replace both(the capacitor some time taken from main capacitor 3 in one 4) if nothing solved suspect with any of a tubes only ( pre Amp or power Amp) (ps didn't see the diagram 1st after seeing it bit clear) Take care while working on it all area high voltage! If nothing solve pm me