[Boatanchors] ongoing Johnson adventure

[Bill Cromwell]

Hi,

In one of my earlier posts (the first one?) I mentioned that I did 
replace the caps and they have been working okay since. A couple of 
resistors too. The screen bypass was broken and I suspect I somehow 
broke that lead of by accident unless decades of thermal 
expansion/contraction did it. I have been using this Ranger since the 
late 80s and I don't feel like I did  'restore' on it. I have done 
'maintenance' and sometimes that included things like *all* the 
electrolytics, and *all* the paper caps. Maybe I will have to hunt down 
one I missed. Or it could be almost anything. I am suspicious of that 
new cap. It pretty much failed at power up after the replacement. I 
usually test before I button up a repair and I didn't this time. I was 
thinking "you might regret this" while tightening screws. It's not 
always good to be right - evil grin.

I have a different radio on my bench right now making good progress. I 
will put the Ranger back on the bench when I finish or stop working on 
the present project. I'm getting older and it's a little harder to work 
on radios, especially crowded radios. I can still do it but it takes me 
all day to do what I used to do all day.

73,

Bill  KU8H

On 02/12/2017 07:34 AM, jbrannig wrote:
> Considering the time, labor and effort that goes into restoring a 
> boatanchor, it seems a false economy to scrimp on the components.
>
> Jim
>
> Sent from my Galaxy Tab® A
>
> -------- Original message --------
> From: Rob Atkinson <ranchorobbo at gmail.com>
> Date: 2/12/17 6:32 AM (GMT-05:00)
> To: Bill Cromwell <wrcromwell at gmail.com>
> Cc: boatanchors at mailman.qth.net
> Subject: Re: [Boatanchors] ongoing Johnson adventure
>
> > I still haven't unbuttoned the Ranger to find where the
> > smoke is coming from. It would be sweet it just cremated a spider or
> > something.
> >
>
> What I do is simply shotgun out all the capacitors that are anything
> other than disc ceramic.  That goes for the paper caps, electrolytics,
> silver micas..they all go.  The micas can develop the silver migration
> through the mica.  Any carbon resistors that look burnt go.  That
> isn't a silver bullet but it can cut down on repeated bench trips. The
> disc caps can have problems too, but I give them a chance.
>
> I have to admit that I can afford to be liberal in my replacement
> because I have a surplus store nearby that has some good deals on
> orange drops and the yellow polypropylene film caps and I bought a lot
> of deeply discounted electrolytics from Allied a few years ago and
> have not used them up yet.   Otherwise, restoring these rigs is
> getting expensive.
>
> 73
> Rob
> K5UJ
> ______________________________________________________________
> Boatanchors mailing list
> Home: http://mailman.qth.net/mailman/listinfo/boatanchors
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Boatanchors 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

-- 
bark less - wag more