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46-480 Power Transformer Vibrates
Pepperoni
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Posts: 160
Threads: 42
Joined: Apr 2011
City: New Port Richey State, Province, Country: Florida
#8

07-30-2013, 11:13 AM
Started working my way through it last night. Nothing yet. I replaced all the tubes one at a time and no change. Still looking.

EDIT: I put the signal generator on it and found that (on the Chuck Schwark Philco 46-480 paperwork) R308 1K 1/2 watt was fried. Buried under a mica cap. So through the process of elimination I narrowed it down to a problem in the RF section of this radio. If you've ever taken the bandswitch out of a 46-480 you know it's not fun.

I checked every component I could get to and all looks good but there's a ton of stuff buried in there that you just cant get to without disassembling the whole RF section. This will be the 2nd time I've done one on a 46-480. 1st time was when I built this set in 2009. And I wouldn't have taken it apart then but I could visibly see fried caps and resistors buried in there.

So the fun begins.

Johnny
"It's Nice To Be Nice To The Nice"
Major Frank Burns Mash 4077th
(This post was last modified: 07-30-2013, 04:03 PM by Pepperoni.)
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Messages In This Thread
46-480 Power Transformer Vibrates - by Pepperoni - 07-28-2013, 10:18 PM
RE: 46-480 Power Transformer Vibrates - by Pepperoni - 07-30-2013, 11:13 AM
RE: 46-480 Power Transformer Vibrates - by EricS - 09-17-2013, 07:09 PM



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