Re: Unpotting techniques... (The patience pecking order)

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "brian by way of Terry Fritz <twftesla-at-uswest-dot-net>" <ka1bbg1-at-mcttelecom-dot-com>

Hi Gary and coilers, i stripped a sid harvey ORBIT the other day using the
frozen chip then solvent. everything went well with the chipping and solvent
worked well,when scrubbing the secondary with a toothbrush i opened up a
hole to the fine wires also. It turned out it is also the burned spot which
killed the output. I'll have a go at peeling off the burned stuff. One of my
industrial chemist friend said try disolving a chip of tar then pour it thru
a paper towel. if you see mica or particles it probably will dissolve ok but
if it turns to a stickey glob it has something other than tar and probably
will be a problem to strip. good luck cul brian
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Sunday, January 21, 2001 11:13 AM
Subject: Re: Unpotting techniques... (The patience pecking order)


> Original poster: "Garry F. by way of Terry Fritz <twftesla-at-uswest-dot-net>"
<garryfre-at-pacbell-dot-net>
>
>
> ----- Original Message -----
> From: "Tesla list" <tesla-at-pupman-dot-com>
> To: <tesla-at-pupman-dot-com>
> Sent: Saturday, January 20, 2001 7:20 PM
> Subject: Re: Unpotting techniques... (The patience pecking order)
>
>
> > Original poster: "Chris Dobson by way of Terry Fritz
> <twftesla-at-uswest-dot-net>" <cdobson-at-microtech-dot-com.au>
> >
> > Hi Gary,
> >
> > I'm sorry you have got worked up over this, but I'm sure the guys on the
> > list meant no offence, only the benefit of their experience.
>
> Yep, I figured they meant no offense. Just brings up bad memories.
>
> > I would just like to mention that this wonderful hobby of ours will test
> you
> > to the limit - - - I can't count how many times I have "given up" on
> > coiling, because a cap blew, or a NST died, etc etc. Luckily, I never
took
> > the hammer to the coil in these situations, just packed 'em up, put 'em
> > away, and sheepishly returned to my favourite pastime ( which I have
> loved,
> > on and off, for close on 40 years) in six months time :^D
>
> Yep, I made my first coil when I was 19 year old in 1974 but due to
> inexperience, I blew up my cap and I didn't have the money for another.  I
> gave it up till 1985
>
> In 1985, I built another and I had a blast with it for about 3 months and
> then one day, the NST shorted. I got another NST and it lasted one minute
> total and then blew. I saw an article on how to make a choke to keep RF
out
> of an NST and it didn't tell me how many windings to use or anything like
> that. All it was was two pages of squiggly hyroglyphics I recognized as
some
> sort of mathematics and lots of terms I never heard of. I gave up till
march
> of 1999. This time, I have the resources of many web pages an info from
this
> list. I have heard people who have said they have depotted NST's and had
> them last for a long time. It just seems to me that if they can do it, I
can
> somehow. My biggest problem is not knowing what to expect, and what to do.
I
> too have "Given up" a number of times.
>
> All in all, I think I have spent close to a thousand bucks on various
tries,
> fried secondaries, blasted caps, blown NSTs, tools, varnish and other
stuff.
> Had I known ahead of time how much it was going to cost me in time and
> grief, I wouldn't have tried it but as it is, I keep expecting the next
$20
> or whatever will solve my problem and I'll have a TC that will last
awhile.
>
> > My two cents worth on your stubborn tar deposits : maybe its that
silicone
> > type mixture or something, because of the three or four NST's that I
have
> > depotted, the stuff has come off pretty well overnight in a barrel of
> > mineral spirits. Mind you - I dropped the core into the solvent while
> still
> > very hot from depotting - its a bit risky 'cos of the low flashpoint of
> > spirit, but I put a lid on straight away ;O0
> > Hope this helps,
> >
> > Regards
> >
> > Chris
> >
> >
> >
>
>
>
>