Date: Thu, 27 Jul 2017 14:17:55 +0100
From: Chris Wilson <dead.fets@gmail.com>
Message-ID: <441679828.20170727141755@gmail.com>
To: rsgb_lf_group@blacksheep.org
In-Reply-To: <15d76cac1c1.marcocadeddu@tin.it>
References: <15d76cac1c1.marcocadeddu@tin.it>
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Subject: Re: R: Re: LF: Re: Antenna change over relay question
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Status: RO

Hello LF'ers,


Thanks for all the great replies, I am near testing time with the none
vac Russian REW15 relay, and I intend to use a second relay to ground
the RX antenna jack of the TS-590 during TX. My hopefully final
question is this. Should I just use a low current PCB mount type relay
to ground the antenna co-ax in the switching box, or go for a big 100
Amp jobbie with the thought that SHOULD a kW of RF get to this relay
for whatever reason it will probably blow a small relay apart, but a
high current one SHOULD hold up and route it to ground and protect the
RX side of the TS-590 (which is solely used for RX). Thanks, both for
posts here and some remarkably detailed stuff by direct mail!


Monday, July 24, 2017, 11:49:45 PM, you wrote:

> Hello LF & VLF,

> I posted my solution, but the attached picture of my ATU for LF/MF was
> too much for blacksheep..
> In my ATU I have to switch in and out the LF base coil 
> of my antenna and change the matching transformer for LF and MF.
> I made it with 2 vacuum relays: the switching of XFMR is made with a 
> Siemens VR311 (rated at 10kV 20A) the coil switching is made with a 
> Jennings RE6 which is rated at 25kV 25A. Both are of course surplus 
> purchases.. but are easy to find on e-bay. For new relays purchase, 
> don't forget, if still valid, that Kilovac was used to sell a small 
> number of relays each year to HAM operators with special (affordable..
> ) price: if you wish to have brand new units a check on their web pages
> is worth ;-)

> 73 Marco IK1HSS


-- 
Best regards,
 Chris                            mailto:dead.fets@gmail.com