[Amps] Is this relay suitable for 1kw+ RF?

[Carl]

I also missed the antenna impedance which will create some high RF voltage 
on 160 in particular.

That is a latching relay and not suitable for what you want to do if Im 
understanding that matching network correctly.

Redraw it to eliminate the 60-10M parts since you wont be using those bands; 
then select the relays needed which Im a guessin' will be a pair of DPDT.

Why not make it a T top load or inverted L for 80 and then all you need is a 
coil for 160, one relay and less voltage worry on 160 and none on 80.

Carl
KM1H

----- Original Message ----- 
From: <qrv at kd4e.com>
To: <amps at contesting.com>
Sent: Thursday, April 17, 2014 4:46 PM
Subject: Re: [Amps] Is this relay suitable for 1kw+ RF?


> Carl,
>
> I know that you won't be surprised that I missed the need
> for two rather than one relays ... sigh.
>
> I'll either have to get two of the ones he recommends:
> http://www.galco.com/buy/Deltrol-Controls/21014-81
>
> Or find another matching Leach.
>
> Thanks ... David KD4E
>
>> That relay is fine for switching coil taps but doesnt appear to be what
>> you need unless you wire sections in parallel and use a relay for each
>> band. Since youre switching at a low RF voltage point the main concern
>> is RF current handling and that relay looks to be overkill.
>>
>> Carl
>> KM1H
>>
>>> I recently acquired one of these 3PDT relays:
>>>
>>> http://www.ebay.com/itm/Leach-Relay-Model-1177-CBF-115-Volt-50-60-Cycles-Coil-374-New-Old-Stock-/121209541061
>>>
>>>
>>> I have an application to cold-switch sections of coil inline with
>>> my 43' ZeroFive vertical to help with tuning on 160 + 80m.
>>>
>>> Anyone know if this relay would be suitable to the task at full
>>> legal ... or for that matter for RF in that application at all?
>>>
>>> Thanks ... David KD4E
>
>
>
> -- 
>
> David (NOT Dave) Colburn, KD4E - Nevils, Georgia USA
>
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