The switches are not actually "enclosed." They do have protective plastic
discs on each side of the contacts of each wafer. Those discs are flexible
AND have a small hole, maybe 3/32" in diameter.
Ten-Tec used a spray contact cleaner called Cramolin in the red can and
sprayed into the contact area of one wafer by either pulling edge of the
plastic protective disc, then immediately worked the switch from end to end
several times. Same action was repeated on each wafer, one by one. It is
possible to spray into the hole in the disc but it takes more of the cleaner
to go to all the contacts. I have better success slightly pulling out the
edge of the disc with a small screwdriver.
After a bit of a wait to allow the cleaner to dry somewhat (an hour or
better), they then sprayed a contact lubricant by Cramolin in the blue can
to protect and preserve the contacts.
Cramolin is (or was) made by Caig Labs. It is no longer available in the
USA, I think. Currently we are using Deoxit, also by Caig Labs. When
selecting which Deoxit to use, take particular note that one of the
formulations is designated NOT to attack plastics. That is the one you use.
The caveat with the Cramolin (and also with Deoxit) is "THE LESS YOU USE,
THE BETTER IT WORKS." Looking at my can of Deoxit, it is denominated DN5, or
D5N. The D5 designates the formulation and the letter N indicates that it is
the type that does NOT attack plastics.
You can see an image of a can of D5N at the following link:
http://bit.ly/IbKg58
The preservative is now called SHIELD. You can see the whole product line at
the following link: http://store.caig.com/s.nl/sc.2/category.192/.f
As with the D5N cleaner, I believe it is important to choose the SHIELD
formulation denominated N, as I think it is the formula which will not
attack plastics.
Armed with the two cans of spray, you will find that treating your contacts
will be an easy job. If you do undertake the cleaning of your bandswitch
contacts, I would appreciate your telling us how you did it and whether or
not you met with success.
73 and Good Luck,
Mike Hyder -N4NT-
----- Original Message -----
From: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>
To: "'Mike Hyder - N4NT'" <Mike_N4NT@charter.net>
Sent: Friday, April 20, 2012 11:12 PM
Subject: RE: [TenTec] Fw: Receiver model 546
> :-)
>
> But let's consider that it was a current case.
> How do you clean those enclosed bandswitches?
>
> I know how to clean a normal bandswitch here the naked contacts are fully
> exposed, but the old Ten-Tecs were encapsuled.
> I haven't a clue how you can clean these, Mike.
>
> 73
> Rick, DJ0IP
>
> -----Original Message-----
> From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]
> On Behalf Of Mike Hyder - N4NT
> Sent: Saturday, April 21, 2012 2:48 AM
> To: Ten-Tec Reflector
> Subject: [TenTec] Fw: Receiver model 546
>
> Whoops. Sorry for the delay, I've been away and didn't realize her
> question
> was in 2010.
>
> Mike
>
> ----- Original Message -----
> From: "Mike Hyder - N4NT" <Mike_N4NT@charter.net>
> To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
> Sent: Friday, April 20, 2012 8:45 PM
> Subject: Re: [TenTec] Receiver model 546
>
>
>> If you can wiggle the bandswitch and get the receiver to come back on,
>> perhaps cleaning it will help.
>>
>> Mike N4NT
>>
>> ----- Original Message -----
>> From: "Barbara" <iloveantennas@dishmail.net>
>> To: <tentec@contesting.com>
>> Sent: Thursday, October 28, 2010 10:17 AM
>> Subject: [TenTec] Receiver model 546
>>
>>
>>> On the 80 meter range occasionally the frequency reads 1.000 mhz and
>>> rec,,goes dead. Back on later. Only 80 meter range is affected. Any
>>> ideas thanks jjdavis
>>
>
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
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