|To:||<email@example.com>, "Jim Idelson" <firstname.lastname@example.org>,"TowerTalk Post" <email@example.com>,"CQ-Contest Post" <firstname.lastname@example.org>|
|Subject:||[TowerTalk] Re: [CQ-Contest] TIC Ring Potentiometer Failure?|
|From:||"Tyler Stewart" <email@example.com>|
|Date:||Sun, 28 Nov 2004 20:31:38 -0500|
Yeah, what Barry said!|
I've had lightning get them as well. You can order replacement pots from Mouser for about $8 last time I checked. It's a 500 ohm 1/4" shaft 10 turn pot. Also get a fist ful of 11 V MOV's or something fairly low to put across the pot wires at both ends and some 50 V ones for the motor wires at both ends. They also have the indicator back light lamps if you need those, but you might want to replace them with something a bit less expensive.
If water is getting your pots, do what you can to seal off the top of the motor assembly using tape and/or caulk.
Other than the indicator pots and lightning hits, my rings (old 1022's) have been extremely reliable.
----- Original Message ----- From: "Barry " <firstname.lastname@example.org>
To: "Jim Idelson" <email@example.com>; "TowerTalk Post" <firstname.lastname@example.org>; "CQ-Contest Post" <email@example.com>
Sent: Sunday, November 28, 2004 7:35 AM
Subject: Re: [CQ-Contest] TIC Ring Potentiometer Failure?
Jim, Could be one of two things. In the earlier rotors, there was a suspected problem of RF burns on the pot coil. This seems to have been cured putting a few bypass caps on the pot. This was added to their production models 3-4 years ago, if I recall correctly.
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.
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