[Boatanchors] Heathkit SB-610 monitor scope

[cemilton at aol.com]

Here's the lineup of critical caps for the SB-610:

(2) .1ufd/1200v
(1) .15/1600v
(2) 10ufd/10v
(2) 40ufd/350v
(1) four-section twist-lock can:  30ufd/450v, 20ufd/400v, 20ufd/350v, 20ufd/300v

Try www.hayseedhamfest.com   I believe he has these in stock.

Hope this helps.
73
Chuck
W4MIL


Remember, the government cannot give anything to anyone that they have
not first taken away from someone else.




-----Original Message-----
From: Rob Atkinson <ranchorobbo at gmail.com>
To: Dick KF4NS <kf4nsradio at verizon.net>
Cc: boatanchors <boatanchors at mailman.qth.net>
Sent: Mon, Nov 7, 2011 12:51 pm
Subject: Re: [Boatanchors] Heathkit SB-610 monitor scope


what did you use for the p.s. caps, in particular the 1600 v. one?
here did you get them?
tnx 73
Rob
5UJ
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 
002 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 
ooked like those two. The
 focus problem should be fixed after replacing the rectifiers and a few 
esistors. About those diodes, I
 will likely use a couple 1N5408s but the usual thing would be to series a 
esistor with each anode lead
 which is usually a good idea in power supplies with original seleniums. In 
his case though I wanted to
 get you input because I noticed that the capacitors are not electrolytic and 
here shouldn't be the usual
 increase in voltage. What do you think? One chap has a solution online whereby 
e used 4 1N4007s in
 series for each replaced diode which I guess he thinks will make up for not 
sing series resistors.

 I also observed that the blue and yellow xfmr leads are reversed but don't 
elieve that should be a
 problem since we are looking at AC here and don't think secondary polarity 
hould be of concern here.

 I have a couple options here will take care of the vertical gain situation. 
ot that covered.

 73, Dick KF4NS
 St Petersburg, FL 33714 USA
 Keep The Glow!


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