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@MSGID: 1@dont-email.me> daf11804
@REPLY:
<914108ac-3891-448e-95c7-ebd59a3ad444n@googlegroups.com> 6960efa8
@REPLYADDR Wu Ming <wu.ming2@icloud.com>
@REPLYTO 2:5075/128 Wu Ming
@CHRS: CP866 2
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<19177721-1b09-4731-a6e7-d02371708c04n@googlegroups.com> 1@dont-email.me>
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@TZUTC: -0000
@PID: NewsTap/5.5 (iPhone/iPod Touch)
@TID: FIDOGATE-5.12-ge4e8b94
ohg...@gmail.com <
ohger1s@gmail.com> wrote:
> On Wednesday, September 13, 2023 at 6:47:33 PM UTC-4, Wu Ming wrote:
>>
jad...@vwtype3.org <
jad...@vwtype3.org> wrote:
>>> On Tuesday, September 12, 2023 at 7:03:10 AM UTC-5, Wu Ming wrote:
>>>
>>>> On multiple accounts a simple turning of the selector forth and back
>>>> repeatedly for few minutes should fix the issue. It did few years back but
>>>> the trick doesn`t work anymore.
>>>
>>>> Anyone with direct experience of it? Thanks for sharing.
>>>
>>> If you look at the tuning capacitor in any older radio, you`ll see that
>>> it consists of a bunch of interleaved plates, half of which are mounted
>>> on a shaft that rotates to let them mesh more or less. The more they are
>>> intermeshed, the higher the capacitance and the lower the tuned
>>> frequency. Taking a more careful look, you`ll notice that the stationary
>>> plates are insulated from the frame of the capacitor while the rotatable
>>> plates are mounted directly on the shaft which is in contact with that
>>> frame. The electrical connection between the shaft and the frame is thru
>>> a ball bearing on one end and usually a brass spring on the other end.
>>> Both ends were lubricated at the factory, but, with time, that
>>> lubrication dries out and oxidation occurs. Metal oxides tend to be
>>> insulators. Once the contact between the shaft and the frame, where the
>>> radio makes its connection, becomes unreliable or intermittent, you`ll
>>> stop getting reception or there will be a lot of noise as the
shaft is turned.
>>>
>>> Moving the shaft back and forth can break thru those insulating films.
>>> You can try Deoxit to remove the oxides and follow up with Shield to
>>> provide some longer term conductivity. I like to also add a bit of high
>>> quality corrosion preventive grease at the same time, for the
longest term benefit.
>>>
>> Thank you for the details. Interesting. Will try.
>
> If it`s one of those open frame tuners, have at it. If it`s one of those
> clear plastic super compact square tuners with plastic film separating
> the plates, then any cleaner you use that carries a lube that doesn`t
> evaporate will detune the tuner. It will work, but it will cause your
> dial to be off, sometimes quite a bit. Over time, the error will slowly
> decrease but never go away. If the radio has an osc trimmer, you might
> be able to fudge a lot of the error away.
>
>
To be honest I have no idea. Maybe the video I linked in my original
question will tell you. Won`t have access to the device until next time I
visit my parents and this may take a while unfortunate.
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