[R-390] Antenna trim repair

[Bob kb8tq]

Hi

The gotcha is the material of the roll pin vs what it’s pressed into. Put two different metals next to each other
and you can get corrosion due to the electro chemical differences in them. That corrosion will quite effectively 
weld something like a pin in place.

Bob

> On Jun 19, 2018, at 11:03 AM, Barry <n4buq at knology.net> wrote:
> 
> I may be wrong, but isn't that just a roll pin that can be pressed/punched out?  I seem to recall having this same problem but don't remember if I ever removed that pin but I _think_ I did...
> 
> Thanks,
> Barry - N4BUQ
> 
> ----- Original Message -----
>> From: "Dave Kirk via R-390" <r-390 at mailman.qth.net>
>> To: "R390 Reflector" <r-390 at mailman.qth.net>
>> Sent: Tuesday, June 19, 2018 9:13:25 AM
>> Subject: Re: [R-390] Antenna trim repair
>> 
>> Not sure drilling is an option that pin is probably harden steel I'll end up
>> breaking drill bits trying to drill out the pin CRAP! Now what? Sounds like
>> I either live with it or try and find a replacement.
>> Dave
>>   On Monday, June 18, 2018, 8:04:48 PM PDT, Stan Gammons
>>   <s_gammons at charter.net> wrote:
>> 
>> I had one that was like that.  I tried to remove the pin with a drift
>> punch but was never able to remove it.  Ended up replacing the entire
>> assembly with a part from another RF deck. In the end that RF deck
>> turned out to have other odd problems, so I replaced it.
>> 
>> Good luck.
>> 
>> 
>> 73
>> 
>> Stan
>> KM4HQE
>> 
>> 
>> On 06/18/2018 08:21 PM, Dave Kirk via R-390 wrote:
>>> Has anyone had any luck getting into the antenna trim can to clean the cap?
>>> The antenna trim on my 390a is intermittent as the knob is turned it acts
>>> like the capacitor contacts need a cleaning real bad. The gear on the
>>> capacitor shaft is pinned on I'm not quite sure how to remove the pin,
>>> maybe drill out the pin ouch! Why the heck did they pin this gear on seems
>>> like two set screws with loctite would have worked just fine.
>>> 
>>> Dave
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