[TowerTalk] relays for remote ladder line switch

R Morris robrk at nidhog.net
Mon Sep 14 23:57:47 EDT 2015


How about two SPDT relays and keep the spacing of the  feedline?

Sent from my iPhone

On Sep 14, 2015, at 22:58, Lee <L at w0vt.us> wrote:

Have the relay spacing around an inch and the contacts good for 5 amps.  Don't hot switch when energizing the relay.  You should have no problem with your idea.  Grounding or undgrounding the unused antennas may change your radiation pattern depending on distance and coupling between antennas.

Lee, w0vt

> On 9/14/2015 8:51 PM, Rik van Riel wrote:
> 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

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