[ICOM] Assistance Needed

[Dave Edwards]

Generally, that is correct. It depends on the rig and amp.
Easy way to find the answer...just measure voltage and current at the relay 
terminals on the amp. Then, flip through the owner's manual of the rig and 
see how close to the limit you are!
I know the Heath amps relays have a lot more juice across them then the 
Drake amps do! I keyed an L7 with my 850 without a problem (although I have 
been told not to!!!) but I chose to use a relay to key the same amp with my 
PRO.
By the way....all sorts of fancy boxes to do the keying...I just used a 
cheap 2 dollar relay from Rat Shack....I skipped all the back emf diodes 
etc. It has been working fine for many years!
....Dave

PS...use an analog vom on the volts setting...stick it in the relay terminal 
of the amp. There is the voltage...switch to amps, jab it in the relay 
terminal...the amp will key, and you will be reading the current. I know I 
don't need to include this procedure (shouldn't anyway) but I have been 
asked MANY times..."how do I measure the relay  E and I?" !!


----- Original Message ----- 
From: "David Knepper" <cra at floodcity.net>
To: "ICOM Reflector" <icom at mailman.qth.net>
Sent: Sunday, May 22, 2005 9:48 PM
Subject: [ICOM] Assistance Needed


> When using either the 775 or 765 with a Collins 30L-1 and other linears 
> with
> a high current changeover relay, is it necessary to use an external relay
> device?
>
> I have heard that some of the newer transceivers will not tolerate the
> current in some of the older  amplifiers.
>
> Thank you
>
> David, W3ST
> Publisher of the Collins Journal
> Secretary to the Collins Radio Association
> To Join the CRA go to www.collinsra.com
> Nets:  3805 Khz, Monday/Wednesdays 8 PM EST and 14250 Khz Saturday, 12 
> Noon
> EST
>
>
> ----
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