[CQ-Contest] RELAY SWITCHING

[Larry Gauthier (K8UT)]

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 at 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 at 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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>>
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