[Milsurplus] I came upon a R390A/URR EAC

[Michael Holdren]

Well that’s a shame. Thank you Bill for the info and quick response. I’l start with trying to identify a short. I guess I have some schematics to dig through.

Thanks,

Michael



> On Feb 4, 2016, at 1:25 AM, Bill Carns <wcarns at austin.rr.com> wrote:
> 
> 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

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/milsurplus/attachments/20160204/b0e34233/attachment.html>