[Boatanchors] Heathkit SB-610 monitor scope

[Dick KF4NS]

Thanks for the tip Jim. The winding is not piggybacked but Ron KA4INM makes a good point. I will flip 
them to the schematic configuration just for safety.

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

----- Original Message ----- 
From: "Jim Wiley" <jwiley at alaska.net>
To: "Rob Atkinson" <ranchorobbo at gmail.com>
Cc: "Dick KF4NS" <kf4nsradio at verizon.net>; <boatanchors at mailman.qth.net>
Sent: Monday, November 07, 2011 1:09 PM
Subject: Re: [Boatanchors] Heathkit SB-610 monitor scope


|
|
| Check the wiring diagram.  If the transformer winding that connects to
| these leads does not connect to anything else, then you are correct, it
| does not matter which way it is connected.  But, if there are any other
| taps on that winding, then it does matter. In that case, correct the
| wiring error before proceeding.  Some scope circuits use the trick of
| "piggybacking" a high voltage winding onto one end of a lower voltage
| winding to gain even more AC to work with.  If this is the case with the
| SB-610, the wiring error could lower the available HV by a significant
| amount.
|
|
| If I remember correctly, the caps are 0.1 uFd.
|
|
| - Jim, KL7CC
| > On Mon, Nov 7, 2011 at 7:25 AM, Dick KF4NS <kf4nsradio at verizon.net> wrote:
| >
| >
| <snip>
|
| > 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.
| >
|
| <snip>
|
|