[Heathkit] SB-610 solid state conversion

[Don Peterson]

You may want to consider laying out a PC board that can be easily mounted in
the bottom of the SB-610 and contains ALL of the parts (HV and all).  This
would make a nice retrofit for the SB-610; similar to what Bob (K8GNZ) did
for the HP-23.  If you want, I could help with the PC Board Layout.  A
double-sided PC board should only cost around $10.00 (in quantity) or so
from many of the PC houses in China.  I have used the China PC Boards and
the quality is good if you select the right vendor.

I'd also suggest an astigmatism control which was very much needed on the
SB-610 and was not there.  Of course switching to solid state will also
increase the changes of permanent damage to the inputs in case of overload
or incorrect set up.  You'd also need some input limiting to help protect
from this as well.  While you're at it, maybe we could also come up with
standard coils that could easily be switched in and out of circuit to
provide the various IF frequencies.  That has also been a pain with the
SB-610.  If the PC board had all of the coils (needed or not) they wouldn't
get lost over time.  Hey this is starting to sound like a really good
idea...

I have an SB-610 in the boneyard, that I wouldn't mind contributing to the
project.

Just my 2 cents...

Ok now, get ready to dodge the rocks!!!


On Thu, Apr 7, 2011 at 9:54 AM, Dave Cook <wa0ttn at netdave.com> wrote:

> Enormous? It's maybe $25 worth of parts on a perfboard. I think it's going
> to be a lot cheaper and simpler than recapping and re-resistorizing the
> unit
> to restore it to what was a mediocre piece of equipment in the first place.
> But thanks very much for your thoughts Miles. I do appreciate all inputs.
>
> 73, Dave WA0TTN
>
> > -----Original Message-----
> > From: heathkit-bounces at mailman.qth.net [mailto:heathkit-
> > bounces at mailman.qth.net] On Behalf Of k2cby
> > Sent: Thursday, April 07, 2011 6:46 AM
> > To: heathkit at mailman.qth.net
> > Subject: Re: [Heathkit] SB-610 solid state conversion
> >
> > Dave,
> > I'll leave it to somebody else to talk about heresy (I'm sure they will).
> > All I can say is that you are taking on an enormous project for very
> little
> > return.
> >
> > Miles Anderson, K2CBY
>
>
> ______________________________________________________________
> Heathkit mailing list
> Home: http://mailman.qth.net/mailman/listinfo/heathkit
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Heathkit at mailman.qth.net
>
> List Administrator: Duane Fischer, W8DBF
> ** For Assistance: dfischer at usol.com **
>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>



-- 
Don Peterson
Data Professionals
1807 Santa Rita Road
Suite D  PMB 277
Pleasanton, CA  94566

Don at D8aPro.com