[TowerTalk] Tic rotor potmeter replacement?

[Michael Keane K1MK]

At one time, about ten years ago, TIC General was suppling a Bourns 
3590S-4-501 as a replacement for the original Clarostat pot in the 1022 
rotor.

73,
Mike K1MK

On 6/19/2009 5:22 PM, john at kk9a.com wrote:
> TIC General used the Bourns model 3590S-1-501 potentiometer in some of their
> units and at one time as replacement parts.  They are not water proof.
> 
> John KK9A
> 
> 
> 
> To: " "Tower Talk"
> Subject: Re: [TowerTalk] Tic rotor potmeter replacement?
> From: "Dick Green WC1M" <
> Date: Fri, 19 Jun 2009 14:19:57 -0400
> List-post: <towertalk at contesting.com">mailto:towertalk at contesting.com>
> 
> Henk,
> 
> The most recent pots I got from TIC are Vishay model 534. It's a 10-turn
> pot, 500 ohms +/- 5%, linearity +/- .25%.
> 
> However, I've seen quite a few of these pots fail due to moisture ingress,
> sometimes accompanied by freezing. I have recently obtained what may be a
> superior replacement: Bourns model 3590S-1-501. This pot has identical specs
> and dimensions to the Vishay pot, but has a plastic body and shaft, as
> opposed to the Vishay's metal body and shaft. Here is a link to the spec
> sheet:
> 
> http://www.bourns.com/data/global/pdfs/3590.pdf
> 
> N3RS told me he replaced the stock pot with the Bourns model quite a few
> years ago and has not had any problems since. He believes the Bourn pot is
> better sealed against moisture than the pot provided by TIC. I have three of
> the Bourn pots on hand but have not attempted to disassemble them to see if
> they are in fact better sealed. My sense is that moisture trickles down the
> shaft and into the body of the pot because the shaft is in a vertical (up)
> orientation. Although the motor case is sealed, eventually moisture finds
> its way to the pot, either through leaks in the case or condensation. If the
> Bourn pot has an O-ring or some other type of seal at the shaft-body
> interface, it may be more resistant to moisture than the Vishay pot.
> 
> 73, Dick WC1M
> 
>> -----Original Message-----
>> From: Henk Remijn PA5KT [mailto:pa5kt at remijn.net]
>> Sent: Friday, June 19, 2009 11:31 AM
>> To: Tower Talk
>> Subject: [TowerTalk] Tic rotor potmeter replacement?
>>
>> Hi,
>>
>> I own a Tic rotor 1032 and the potentiometer stopped working. I know it
>> can be a cabling problem, but if the potmeter is the problem I want to
>> have the right parts available I would like to buy a replacement potmeter.
>>
>> Does someone know what potmeter is inside?
>>
>> 73 Henk PA5KT
>>
>> --
>> Henk Remijn PA5KT
>> email: pa5kt at remijn.net
>> www: www.remijn.net
> 
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> 
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