[Amps] Stuck setscrews

[Jim W7RY]

I'm sure a search for "softening lock-tight" will lead you to the proper 
solvent...

73
Jim W7RY


-----Original Message----- 
From: Victor Rosenthal 4X6GP
Sent: Friday, December 08, 2017 7:43 AM
To: Alek Petkovic
Cc: Amps reflector
Subject: Re: [Amps] Stuck setscrews

I'm sure those would do the job. More than the job, unfortunately.


73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/
On 8 Dec 2017 14:50, Alek Petkovic wrote:
> Angle grinder or oxy torch.
>
> On 8/12/2017 7:27 PM, Victor Rosenthal 4X6GP wrote:
>> I have an older Palstar AT-Auto tuner. It uses stepper motors to turn a 
>> rotary inductor and a capacitor. It works very well in my station (or it 
>> did).
>>
>> The motors are connected to the coil and capacitor with semi-flexible 
>> insulated couplings that are made out of some kind of plastic strip. The 
>> plastic on the one for the capacitor has disintegrated. I have a good 
>> quality metal and ceramic coupling to replace it with, but I can't budge 
>> the setscrews holding the old one. Allen wrenches twist to no effect.
>>
>> The screws are held with some kind of glop. I don't think it is Loctite 
>> but I don't know for sure. I put some penetrating oil on them and am 
>> waiting to see if that works.
>>
>> I suppose I could drill them out if needed, but that is a last resort 
>> because I am afraid of damaging the motor or the capacitor. Any 
>> suggestions?
>>
>
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