For anyone who might be confused by the armature and parasitic verbage here
is what Allan Bradley has to say about Form X relays:
A Form X contact arrangement is one which has single-pole, single-throw,
normally open double-make contacts. The function of this arrangement is to
close a circuit when actuated.
Forget about parasitics and armatures. It is just a contact configuration.
73,
Ron W8RJL
----- Original Message -----
From: "Jim Lux" <jimlux@earthlink.net>
To: <richard@karlquist.com>
Cc: "Van K7VS" <wa7fab@cdsnet.net>; <towertalk@contesting.com>
Sent: Monday, September 27, 2010 11:20 PM
Subject: Re: [TowerTalk] X99KP 12VDC RELAY FOR AMERITRON REMOTE ANTENNA
SWITCHES
> W8JI mentioned tat they have form X contacts. That is the two contacts on
> the armature are bridged permanently, and there's no separate connection
> to the armature. Sort of like a rf transfer switch. Reduces parasitic c
> from armature to coil, etc.
>
> On Sep 27, 2010, at 10:55 AM, "Rick Karlquist" <richard@karlquist.com>
> wrote:
>
>> Van K7VS wrote:
>>> THE X99KP 12VDC RSCo. SPDT RELAYS ARE MANUFACTURED BY A COMPANY IN
>>> CHICAGO
>>
>> The company is probably Magnecraft, in my old home town of
>> Des Plaines, IL, a suburb of Chicago. They show some
>> nice off the shelf relays for antennas. Maybe the
>> Ameritron has gold plated contacts as a special. That's
>> the only thing I can think of where the OTS relays
>> are less than optimum.
>>
>> Rick N6RK
>>
>> _______________________________________________
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