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#1
05-31-2010, 12:54 PM
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Glass resistor
I had a thread a while back about my Apex radio. Most people thought it was a home brew but I really like it. The grid leak resistor was a glass tube with metal ends and it has a sticker on it. It should be 3 meg ohms and it tests at 7 meg.My tube book states that the 01a should have a grid leak resis. of 2-5 meg if I remember correctly. i put the correct value in but now I would like to find the correct style. Any ideas where I can find that syle resistor?
Last edited by radio nut; 05-31-2010 at 12:57 PM. 
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#2
05-31-2010, 01:43 PM
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I don't think that is anything you will find New or even NOS. This guy built his own:
http://www.99main.com/~allens/gridleak.htm Have you tried running the radio with the 7 meg resistor in? I don't think they change much in value, being carbon-coated glass, so it should run as well as it did originally. You could also parallel in different resistors until you get 3 meg.
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#3
05-31-2010, 02:23 PM
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Play Things of the Past has grid leak resistors.
Usual - no affiliation, just a happy customer. Cheers,
__________________
Brian USN RET 22YRS (Avionics/Cal) CET-Consumer Repair and Avionics ('88) "Capacitor Cosmetologist since '79" When fuses go to work, they quit!
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#4
05-31-2010, 03:07 PM
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Agree with Leadlike that the radio should play fine with 7 megs: in fact, you might want to experiment with different values. What some have done is left the old glass resistor in place for looks and paralleled it with a modern hidden one. Of course you'd have to figure the total for parallel resistors, or "discombuberate" the old one.
__________________
Reece Perfection is hard to reach with a screwdriver.
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Linear Mode
