[Milsurplus] I came upon a R390A/URR EAC

[Bill Carns]

No, It is bad.  Even a hot cap at 10 Vac applied will not smell “burning” usually.  Sounds like maybe a transformer or resistor reacting to a short.

 

I would stop and do some ohming around after doing a real good inspection. If you can’t see anything and find anything, it is time to start disconnecting a few things to start isolating the problem.

 

Bill

 

From: Milsurplus [mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of Michael Holdren
Sent: Thursday, February 04, 2016 1:05 AM
To: milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] I came upon a R390A/URR EAC

 

Hi everyone, I’m new to this list. I purchased the other Collins R-390A that Hutch is talking about.

 

I have a quick question: should there be a burning smell when I power it on?

 

After inspecting the unit (looking around the insides without removing anything), I realized the radio is actually pretty clean even though it doesn’t really look like it on the top, the bottom is nearly immaculate. So I decided to try using a variac to slowly power up the radio. I went up to about 10v and after only about 5 minutes, I noticed an electronic burning smell. Could this be the reforming of the capacitors, or is it something else/bad?


Thanks,

Michael




 

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