[Hallicrafters] RE: Black Beauties in SX-100

[Roger Halstead (K8RI)]

Now you've gone and done it.  It's all your fault!  I'm starting to thing of
redoing my SX100 and 101A, but I've very good at procrastinating.

Roger Halstead (K8RI, EN73 & ARRL Life Member)
N833R, World's Oldest Debonair (S# CD-2)
www.rogerhalstead.com


> Good Morning Ken --
>
> Same thoughts on my SX-101A.  It's my primary 10M AM receiver, and works
> simply great!!  So, I've avoided replacing the BB caps since I use the
> receiver quite a lot.
>
> It's been discussed here, or maybe there, or maybe in ER magazine....I
can't
> remember.... that BBs used where lower voltages are applied tend not to go
> bad that fast.    For instance, around the selectivity circuits.  So, it
may
> be worth replacing those caps that are used in bypassing/coupling
> applications etc and not worry about hard to get ones if lower voltages
are
> involved etc.
>
> I've never owned an SX-100...yet...  but check to see if there are any
BB's
> in the audio stage that, if they shorted,  would place a direct short
across
> the audio transformer.   That is on situation in which it's well worth it
to
> replace the associated caps.
>
> Nice annotated photo BTW;  I have it store on disk.  Since I'm pretty
color
> blind,  the only way I have to replace caps is to correlate their physical
> placement with the schemtaic; and I've used a paper notebook for years to
> make a "map"   I don't trust myself with the colors.  Of course,  I could
> just go buy an LC meter.....
>
> 73 Mark K3ZX
>
>
> ----- Original Message ----- 
> From: "Ken Kaplan" <krkaplan at cox.net>
> To: <hallicrafters at mailman.qth.net>
> Sent: Saturday, January 31, 2004 2:08 AM
> Subject: [Hallicrafters] RE: Black Beauties in SX-100
>
>
> > Well I looked closely at my properly functioning SX-100 and found too
many
> BBOD's. So
> > now I'm faced with a problem many others have had to deal with. Do I
"fix"
> a perfectly
> > functioning receiver? I'm always looking for an excuse to fire up the
old
> soldering iron so
> > you can guess the answer.
> >
> > For those who might be interested, I took pictures of the chassis and
> identified the
> > locations of the little rascals. You can find the pics on my website at:
> >
> > http://www.qsl.net/kb7rgg/radio/index.html
> >
> > The link is toward the bottom of the page. I think there are 5 or 6 of
> them on the band
> > switch. That won't be fun :-(
> >
> > 73 Ken kb7rgg
> >
> >
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