[Amps] Stuck setscrews

[Victor Rosenthal 4X6GP]

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?
>>
>