[R-390] The adventure begins (and a capacitor question).

Wed, 22 May 2002 18:26:30 -0400

		John,

	I don't think it's overkill to get rid of all the electrolytic, paper and 
wax caps from the outset. I was told by a former engineer for Sprague 
that all caps of those types should be replaced in radios made before 
1960. He said that around 1960 the technology for producing the caps 
changed and they tended to be more robust.

	Gary - WA4IAM

John Saeger wrote:

> These are great ideas.  I'll have to get some of that DeOxit stuff.  But I'm
> a big fan of pre-emptively changing capacitors.  I guess this comes from
> getting what was my grandfather's Stromberg Carlson Model 60 working.  This
> radio was from the 1930's and the capacitors were pretty ugly.  There was
> waxy oily stuff dripping off of many of them and some were encased in tar.
> So I was pretty ruthless.  I replaced every single paper, oil, or
> electrolytic capacitor with polyester or a new electrolytic and now it works
> great.  Maybe that's overkill, but I won't have to worry about those
> capacitors for a long time.
> 
> John
> 
> 
> ----- Original Message -----
> From: "blw" <[email protected]>
> To: <[email protected]>
> Sent: Tuesday, May 21, 2002 5:31 PM
> Subject: Re: [R-390] The adventure begins (and a capacitor question).
> 
> 
>>Maybe you can do some other things first, and get better performance right
>>away.
>>
>>The first thing would be to check all of the tubes. I cleaned all of the
>>pins on my tubes and put a tiny bit of DeOxit on each pin. I also cleaned
>>every connector and finished with DeOxit again. I did the crystals last.
>>Mine sounded like a different radio when I finished up.
>>
>>All of this is easier than tearing into it first thing.
>>
>>You get better audio from the diode load point instead of line audio. I
>>think it's #15 for positive audio out. You can get ground from #16.
>>
>>
>>Barry
>>
>>
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> 
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