[Heathkit] Wierd SB-614 trace problem!

[Ian Wilson]

Sounds as if there is some hum being injected somewhere..

73, ian K3IMW



On Thu, Aug 21, 2014 at 7:55 PM, Alexander N. Gerli <ac1wye at gmail.com>
wrote:

> Hi, guys. I need some help. I'm working on my SB-614 trying to sharpen up
> the trace. What's happening is that I can get a nice straight line trace
> and focus it nicely. Checked the astigmatism and got that as sharp as
> possible. Now, if I reduce the horizontal gain so there's only a short
> horizontal line, half the screen width, there appear to be TWO distinct
> horizontal traces, one parallel to the other and they are very close
> together. Needless to say, my voice pattern appears to be out of focus even
> when I have the resting focus set as sharp as possible.
>
> Has anyone else run into this? And what component(s) did you change to cure
> it? I've rebuilt the HV with new caps and diodes and changed a number of
> resistors with the kit from Datapro. Something is still not right. My '610,
> by comparison, has a nice sharp pattern after I rebuilt it last year.
> Naturally, the "In Case" section of the Manual doesn't address a trace like
> this.
>
> ​73,​
>
>
> ​Sandy AC1Y​
>
>
> Alexander N. Gerli, Sr.
> 548 Allred Mill Road
> Mount Airy, NC 27030-2202
>
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