[Boatanchors] Heathkit SB-610 monitor scope

[Lloyd Godsey]

What value are the 1600 v caps?

Thanx
Lloyd Godsey KK7IZ
kk7iz at cox.net
480-620-7145
http://www.lloydsdipsydumpster.com/
http://antiqueradioarchives.com/
Skype: lloyd.godsey

-----Original Message----- 
From: Rob Atkinson
Sent: Monday, November 07, 2011 10:51 AM
To: Dick KF4NS
Cc: boatanchors at mailman.qth.net
Subject: Re: [Boatanchors] Heathkit SB-610 monitor scope

what did you use for the p.s. caps, in particular the 1600 v. one?
Where did you get them?

tnx 73

Rob
K5UJ

On Mon, Nov 7, 2011 at 7:25 AM, Dick KF4NS <kf4nsradio at verizon.net> wrote:
> Decided to dig into it again since I had not done much with it since I got 
> it 2002 and replaced all the
> power supply caps. Recent testing showed poor focus and low vertical gain.
>
> I found the two B+ diodes shorted. Wow, never saw any selenium rectifiers 
> that looked like those two. The
> focus problem should be fixed after replacing the rectifiers and a few 
> resistors. About those diodes, I
> will likely use a couple 1N5408s but the usual thing would be to series a 
> resistor with each anode lead
> which is usually a good idea in power supplies with original seleniums. In 
> this case though I wanted to
> get you input because I noticed that the capacitors are not electrolytic 
> and there shouldn't be the usual
> increase in voltage. What do you think? One chap has a solution online 
> whereby he used 4 1N4007s in
> series for each replaced diode which I guess he thinks will make up for 
> not using series resistors.
>
> I also observed that the blue and yellow xfmr leads are reversed but don't 
> believe that should be a
> problem since we are looking at AC here and don't think secondary polarity 
> should be of concern here.
>
> I have a couple options here will take care of the vertical gain 
> situation. Got that covered.
>
> 73, Dick KF4NS
> St Petersburg, FL 33714 USA
> Keep The Glow!
>
>
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