[CQ-Contest] Multi 2 locking device?

[Igor Sokolov]

1) Two LP on different bands with different antennas - use 
http://microham.com/contents/en-us/d75.html or 
http://quad.ru/production/switchSO2R.php The latter has better port 
isolation. WX0B six pack has much poorer port isolation then the above 
mentioned two switches). For home brew switch project try here 
http://www.sj2w.se/contest/?page_id=1547  and here 
http://kk1l.com/kk1l_2x6switch/

2) Two LP on different bands using the same multiband antenna - in addition 
to the abobe switch you will need triplexer and band pass  filters. The best 
combo one is by VA6AM (ex UN7LG) 
http://un7lg.shawwebspace.ca/blog/post/triplexer_with_bpfs_combo_unit/
There are also W2NQN filters (good), UA4CC filters 
http://quad.ru/production/bpf.php (very good), RA6LBS triplexer 
http://quad.ru/production/bpf.php, There are also INRAD and DUNESTAR 
triplexers but VA6AM seems to be the best (see here 
http://un7lg.shawwebspace.ca/blog/post/high_quality_200_watts_hf_triple)
VA6AM has got all the info for building home brew triplexer and filters.
5B5AGN has the info for building BPF here 
http://ac0c.com/main/page_so2r_5b4agn_bpf_modules.html
Also a lot of (but not complete) info can be found here 
http://www.k8nd.com/Radio/SO2R/SO2R_Products.htm





73, Igor UA9CDC
----- Исходное сообщение ----- 
От: <john at kk9a.com>
Кому: <cq-contest at contesting.com>
Отправлено: 6 января 2017 г. 21:27
Тема: Re: [CQ-Contest] Multi 2 locking device?


> One somewhat expensive solution is to use a triplexer and then feed each
> bands coax into a 2x6 relay box such as a SixPak. The relay box makes it
> physically impossible for both radios to connect on the same band. The
> triplexer will allow you to operate on two bands simultaneously with using
> the Cushcraft beam using band pass filters.
>
> John KK9A
>
> To: cq-contest <cq-contest at contesting.com>
> Subject: [CQ-Contest] Multi 2 locking device?
> From: "Fco. Luis Delgadillo" <xe2b at outlook.com>
> Date: Thu, 5 Jan 2017 18:03:29 +0000
>
> Hola,
>
> I'm planning to operate M2 LP, the oncoming contest season.
> I do have two WX0B passbands filters from my previous SO2R setup.
>
> -Only two radios will be used.
> and
> - Very simple antennas setup on a city lot:
> Log periodic Cushcraft ASL-2020
> Vertical tribander Force13 VR-3
> Twin Slopper Alpha-delta DX-A
>
> Is there any summary related to options available for locking devices to
> prevent two radios to operate in the same band?  I do not want to have 
> burned
> front ends.
> Preferably,  I would like to build it.
>
> I appreciate the feedback
>
> 73
>
> Luis XE2B
>
>
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