[Heathkit] SB-610 Monitor Scope

Sat, 31 May 2003 22:26:13 -0400

I think I'd use a scope to look for noise on the CRT inputs, especially the
vertical input and focus.  (Sorry, I don't have my -614 any more so I have
no book to refer to.  I'm shooting from the hip here, but it seems a
reasonable place to start.)

Short of that, shielding may be the right answer.  Is there some radiating
device on that side of the scope (like a transformer... even in an adjacent
piece of gear?)

The only other thing that comes to mind is that the NOS CRT is kaput...
perhaps the phosphor is not adhering to the glass correctly anymore.

Let us know what you find...

Mike
KG8L

-----Original Message-----
From: [email protected]
[mailto:[email protected]]On Behalf Of Kim Herron
Sent: Saturday, May 31, 2003 10:38 PM
To: Bill Pancake; [email protected]
Subject: Re: [Heathkit] SB-610 Monitor Scope

Hi Guys!!

>The issue is that the CRT's horizontal trace (with no signal input) is
>very sharp & crisp on the left side of the tube and gets less sharp and
>somewhat thicker n' fuzzier as it approaches the right side. No adjustment
>of the intensity or focus controls on the front panel will correct the
>"fuzzy" right side of the line trace. When monitoring SSB voice signals
>the display appears normal.
>
>Anybody got any ideas on how to make the CRT's trace sharp and even in
>thickness all the way across the display ??? Thanks & 73, Bill
>K0JWP  ([email protected]).

       Do us a fovor and post it to the whole reflector.  I've had several
of these scopes (610's and 614's) and most have had the same problem.
I'm guessing shielding but I haven't found a good answer

Thanks!!

Kim Herron
1-616-677-3706

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