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Re: [Amps] Kilovac relay in MFJ 2020 catalog

Subject: Re: [Amps] Kilovac relay in MFJ 2020 catalog
From: Jim <>
Date: Wed, 19 Feb 2020 09:28:37 -0600
List-post: <>
Depends on how fast the relay is. Just because its vacuum, doesn't mean its fast!

I use solid state relays for cathode switching now days. Works great.

Jim W7RY

On 2/19/2020 9:09 AM, Jim Thomson wrote:
Page 76   in  the  2020  MFJ  catalog.

A. 408-8100, $19.95.    Kilovac S05FJA238, DPST-NO, contact form 2A.  5kV 
rating between contacts, current is 10A DC or 5A RF, 12 VDC coil voltage and 
500 Ohm coil resistance.

##  Has  anybody  used  this  relay b4,  for  any  application ?   I  was  
going  to  use one (with  contacts  in  parallel),  to shunt  the  100K 
resistor in  the  CT,  when  on  TX.  (Bias  cut  off  resistor  on a  GG  
triode).   $19.95  is  cheap  for a new  vac  relay.   It  only  has  to  
handle cathode  current.  (sum  of grid +  plate  current).  I  want  it  FAST.

##  I  have a small  ceramic  jennings spst-no,  3.6kv @ 10A  I  was  going  to 
 use  for the  same  application,  but alas,  I  can't  find  it  in my   
myriad  of  shelves +  boxes.

Jim  VE7RF
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