[Milsurplus] I came upon a R390A/URR EAC

[Michael Holdren]

This is a little bit greek to me, so thank you for the follow-up. 

I just pulled out the fuse in the back, and it’s like nothing I’ve seen before. Looks like some string or wire is wrapped around the material inside the glass. I’ll have to research this as well.

Thanks,

Michael



> On Feb 4, 2016, at 1:38 AM, Bill Carns <wcarns at austin.rr.com> wrote:
> 
> By the way, at 10 Vac applied, the filaments are barely getting any voltage so the rectifiers are not on - nor are you getting them up past the forward voltage threshold so you have no B+ to speak of.
>  
> Also check the fuse to see that some other past guy has not used a “way to high” value to see if he could find a problem by making smoke.  Bad plan.
>  
> 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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