[Boatanchors] Heathkit SB-610 monitor scope

[Dick KF4NS]

Lloyd, there are 3 caps in the HV supply, the 1600v is .15mfd and the 2 others are .1mfd at 1200v
Hope this helps.
73, Dick KF4NS

----- Original Message ----- 
From: "Lloyd Godsey" <kk7iz at cox.net>
To: "Rob Atkinson" <ranchorobbo at gmail.com>; "Dick KF4NS" <kf4nsradio at verizon.net>
Cc: <boatanchors at mailman.qth.net>
Sent: Monday, November 07, 2011 12:53 PM
Subject: Re: [Boatanchors] Heathkit SB-610 monitor scope


| 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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