[R-390] Antenna trim repair

[Manfred Antar]

Try a drop or two of Kroil , leave to penetrate overnight.
Then try to push out. Kroil is amazing on stuck nuts and bolts, stuck pins and such.
Manfred

> On Jun 19, 2018, at 8:22 AM, Bob kb8tq <kb8tq at n1k.org> wrote:
> 
> 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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