[R-390] R-390 Z501 success !!

[kc9ieq via R-390]

I had the weld(bond, whatever you want to call it) holding the SS or titanium contact on an antique spark gap key break apart by attempting to clean it in a small ultrasonic tank.   

Be careful.  Same advice for inserting fingers into the tank while running.  Enough power and bad things can happen.  Google it.  

Regards, 
Chris kc9ieq


Sent from my Verizon Wireless 4G LTE smartphone


-------- Original message --------
From: Bob Camp <kb8tq at n1k.org> 
Date:07/30/2014  8:44 PM  (GMT-06:00) 
To: Frank Hughes <fsh396ss at gmail.com> 
Cc: r-390 at mailman.qth.net 
Subject: Re: [R-390] R-390 Z501 success !! 

Hi

If you go near a radio with an ultrasonic, pull all the crystals out of it first ….

———

Ultrasonic cleaners work very powerfully over very short distances. Something like a split gear is not a good thing to attack with an ultrasonic.

Bob

On Jul 30, 2014, at 9:16 PM, Frank Hughes <fsh396ss at gmail.com> wrote:

> Hi,
> The mysterious (to me) Z501 has been adjusted on the "tailgate" R-390,
> thanks to the kind advice from members here!
> 
> http://i180.photobucket.com/albums/x257/fish1_07/R-390/Z501_aligned_zpsbdd94e94.jpg
> 
> I had hoped to keep going in the TM to the next steps tonight, then the
> house well pump started acting up!
> 
> We need the water for normal things in the house, but it also runs the heat
> pump, as it is a water source system.
> It is HOT here, comfort for the XYL and the rest of the critters in the
> house took
> priority the remainder of the evening.
> 
> Anyway, thank you very much, more progress on the R-390 soon!
> 
> While I totally agree that complete dis-assembly is best for cleaning and
> subsequent lube, I just don't have the hours available, need a working
> R-390 for AM nets operational by Winter, a pretty R-390 is for after I
> retire: May-2017!
> 
> The ultrasonic cleaner idea is perfect, but mine is tiny- fits a couple of
> 1911's, nothing larger (sigh).
> Next time I purchase an ultrasonic cleaner, I will strive to obtain one so
> large that the R-390 RF deck and/or an M2HB fits in (sans barrel, of course)
> 
> 73
> Frank
> KJ4OLL
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