Off topic - Dow Key relay help

[Garey Barrell]

Good Grief!!!

Almost got it right...  I think this is safer!

I'll be quiet now ...

Garey - K4OAH
Atlanta

> Jerry -
>
> The "end" connector is the "arm" of the relay.  This normally goes
to
> the antenna.
>
> The longer side connector is the receiver connection.  It is longer
> because there is a double-break contact inside that gives higher
> isolation to the receiver.  This connector is also on the same side
> of the relay as the coil.
>
> The connector on the other side of the relay from the coil is the
> transmitter connection.
>
> When actuated, the coil  _pushes_  the arm of the relay from the
>  receiver side to the transmitter side, connecting the antenna to
the
> transmitter.  When released the arm moves back toward the coil side,
> pressing against the receiver connector, closing the internal break
> connection and connecting the antenna to the receiver.
>
> It is worthwhile to remove the plug button in the end of the relay
> housing so you can see the contacts inside.  The two opposing
> connectors are screwed into the housing and locked with the jam nut
on
> the outside.  I have seen more than one relay of this type where the
> jam nut has loosened, allowing the connector to be threaded too far
> into the body of the relay and effectively jamming the contacts
> together.  This is not good!!  It essentially connects the receiver,
> transmitter and antenna all together at the same time, usually
> resulting in a blown input to the receiver.
>
> So look at the contacts first and ensure that the arm is resting
> against the button on the coil side and that there is a gap on the
> other connector button.
>
> Another potential problem is if the receiver connector has been
> unthreaded too far, and there isn't enough travel to close the
> internal double-break contact on the receiver side.  This results in
> little or no RF reaching the receiver.
>
> More than you ever wanted to know!
>
> 73, Garey - K4OAH
> Atlanta
>
>
> ----- Original Message -----
> From: "Jerry Kitterman" <kitt5 at EARTHLINK.NET>
> To: <HEATH at LISTSERV.TEMPE.GOV>
> Sent: Thursday, March 28, 2002 2:16 PM
> Subject: Off topic - Dow Key relay help
>
>
> >   Gentlemen,
> >
> >    I have a series DK60 dow key relay, spdt coax relay, 100 VAC
that
> I want
> > to use with my DX-60 rig. It has the UHF connectors. One is on the
> end of
> > the body of the relay and I assume this may be the connector for
the
> input?
> > and the other two are both mounted vertical on the other end. The
> longest
> > one is on top by the solenid? of the relay that has the connection
> for the
> > 110v and the other one is directly underneath the top one on the
> same end.
> > Are these two for the xmtr and rx? How can I make sure which one
is
> which
> > without blowing it up? Thanks for any help and excuse my ignorance
> of
> > trying to explain the relay. Thanks es 73
> >
> >  Jerry..W9CTB
> >
> >
> > --- Jerry Kitterman
> > --- kitt5 at earthlink.net
> > --- EarthLink: The #1 provider of the Real Internet.
>

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