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Re: [CQ-Contest] RELAY SWITCHING

To: <cq-contest@contesting.com>, "Herbert Schoenbohm" <herbs@vitelcom.net>
Subject: Re: [CQ-Contest] RELAY SWITCHING
From: "Larry Gauthier \(K8UT\)" <K8UT@charter.net>
Reply-to: "Larry Gauthier \(K8UT\)" <k8ut@charter.net>
Date: Mon, 14 Dec 2015 13:55:44 -0500
List-post: <cq-contest@contesting.com">mailto:cq-contest@contesting.com>
I've been using these relay modules for control switching with Raspberry Pi's, and they work great.
Has anyone performed any experiments/measurements on their suitability as RF 
switching relays? Could they perform antenna selection from the common coax 
to one-of-eight SO-239 outputs?
-larry (K8UT)
-----Original Message----- From: Herbert Schoenbohm
Sent: Sunday, December 13, 2015 3:36 PM
To: cq-contest@contesting.com
Subject: Re: [CQ-Contest] RELAY SWITCHING

This Arduino 8X1 is superb at controlling a DXE 5 KW box mounted at the
base of the tower with CAT 5 cable 150 feet long.  The Arduino is in the
shack driven by the AUX output of the Ameritron RCS-12 which provides
either automatic  BCD selection from the Icom or manual selection by the
RCS-12 push buttons.  If you don't use the RCS-12 a small rotary switch
with a wall wart will work.  You can't beat the price.

http://www.ebay.com/itm/5V-8-Channel-Relay-Module-Board-for-Arduino-PIC-AVR-MCU-DSP-ARM-Electronic-/360724151178?hash=item53fcd5bb8a:g:d4kAAMXQ2dBSFhh1


Herb Schoenbohm. KV4FZ


On 12/11/2015 6:01 PM, Pete Smith N4ZR wrote:
Joe, there is a large family of such things available from China. I had one working to switch my RX antennas. I coupled the 315MHz RF to the inner condfuctor of 300 feet of coax and picked off the "wireless" signal at the other end. It switched fine, but I had trouble with other aspects of the setup - losses in the DX coupler for the relay power - and eventually scrapped the thing. The relays may be a bit light for transmit antenna switching, but should certainly work to switch other, heavier relays.
My experiment is written up in NCJ for May-June 2014

73, Pete N4ZR
Download the new N1MM Logger+ at
<http://N1MM.hamdocs.com>. Check
out the Reverse Beacon Network at
<http://reversebeacon.net>, now
spotting RTTY activity worldwide.
For spots, please use your favorite
"retail" DX cluster.

On 12/11/2015 10:58 AM, Joe wrote:
I was thinking of using one of these "AS IS" and if not strong enough to use them to control the actual heavier relays.
http://www.goodluckbuy.com/12v-8-channel-wireless-rf-switch-relayremote-control-315mhz-for-light.html

Joe WB9SBD
Sig
The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com
On 12/11/2015 8:44 AM, Chuck Dietz wrote:
Did you get any responses to this?  I am interested. I have a number of
antennas to switch and would like to get rid of the wires.

Chuck W5PR

On Thu, Dec 10, 2015 at 5:19 PM, Trent Sampson <vk4ts@outlook.com> wrote:
Having noticed a new change of tack by manufacturers to IP based antenna selection and a plethora of IP/ Relay driven devices reasonably priced on
Ebay -
Has anyone had any success using these items (EBAY) to control the likes of Six Packs or switched bandpass filters - and integrating with N1MM or
the like ?
Regards

TrentVK4TS PO Box 275 Mooloolaba 4557 0408497550
Please note I no longer use the WIA email address where possible owing to
it blocking emails from sites such as VK Logger and ARRL.
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