[TowerTalk] relays for remote ladder line switch

[dw]

Hi Rik,
Years ago, I had a box outside with a electromagnetically actuated
stepper switch made by Ledex.
A rotary step relay.
It physically turned a 4-bank double-pole wafer switch network, 9
positions.
I had 9 different LC networks setup inside the box, tuned for different
bands.
The stepper had an additional signal line for it to step to home
position.
It would step by a 12 volt DC pulse.
I programmed a PIC to control it so I could select a given band.
The PIC was connected to an ICOM-706's, band-voltage output, in order to
monitor the band the rig was on.
When I would change to a different band, the PIC would send the rotary
switch to home position and then step it to the correct band-position.
You might look into a rotary switch as a possible solution.

You can see this type of switch at Surplus Sales of Nebraska.
http://www.surplussales.com/switches/SWLedex-1.html
Sounds like a fun project!!
N1BBR :-]

> On Mon, 14 Sep 2015 21:51:27 -0400 Rik van Riel <riel at surriel.com>
> writes:
> > Hello,
> > 
> > I am considering building a remote ladder line switch using 
> > W199X-12
> > relays, which are open frame DPDT with 1600V breakdown voltage 
> > between
> > open contacts, 2200V between poles and coil/contact.
> > 
> > I run with 100W power.
> > 
> > Does anybody have opinions on relays like those, experience with 
> > them,
> > or good experiences with other relays that you think I should
> > consider instead?
> > 
> > I am looking at switching between two lazy H antennas (one 
> > east/west,
> > the other north/south) and maybe some doublets for lower bands.
> > 
> > The plan is to have each antenna switched either to a 4:1 balun, or
> > to ground. Would it make more sense to leave the unused antennas
> > ungrounded, or discharge static through 1M resistors?
> > 
> > thank you,
> > 
> > Rik AB1KW
> > -- 
> > All rights reversed.
> > _______________________________________________
> > 
> > 
> > 
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> > 
>  
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