Heat will soften the Loctite if that is what it is.
-----Original Message-----
From: Victor Rosenthal 4X6GP <k2vco.vic@gmail.com>
To: Alek Petkovic <vk6apk@bigpond.com>
Cc: Amps reflector <amps@contesting.com>
Sent: Fri, Dec 8, 2017 8:46 am
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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