[Henry] Henry 2K relay problem

Fri, 18 Oct 2002 12:04:44 -0700

You didn't say which Icom, but most all of them require (as in mandatory) a
keying circuit between the Icom and the linear.  Some amplifiers are OK, but
most of the older ones draw way too much current for the 20 ma. capability
of the Icom send circuit.  The usual result is to fry the Icom.

Dick - W6CCD

----- Original Message -----
From: "David L. Thompson" <[email protected]>
To: <[email protected]>
Sent: Friday, October 18, 2002 10:50 AM
Subject: [Henry] Henry 2K relay problem

> I have a very old Henry 2K Serial # 156.  I have been using this on the 17
> and 12 meter bands.   Today the Henry will not key from an
> exciter/transceiver.  The old 2K has the time delay relays and a pair of
> relays for control and these all appear in good order.  I have had to
> burnish these in the past and have replaced the 115N120 6N02 time delay
> relays in the past.
>
> The problem seems to be the keying from the exciter.  I replaced the
keying
> line from the ICOM (just a normal open/closed transmit circuit).  The amp
> kicked in Ok so I hooked up the old lead again and again nothing.  The
> replacement lead also did not key the amp.  I checked both leads (RCA
plugs
> on each end) and when I put the ICOM in TX the circuit closed.  I then
found
> a lead with the RCA plug at one end and solder leads at the other.  I
> plugged in the RCA to the Henry 2K relay jack and shorted the lead and
still
> nothing.  I did
> notice that when I plugged in the replacement that there was a spark and
the
> circuit worked and the Henry took drive correctly.
>
> Before I tear into the 2K (its difficult to do as you have to take the amp
> chassis out of the
> console) does anyone have any ideas.  I don't think there is another relay
> only a circuit that ties into the two relays in the power supply chassis.
> The ICOm keys my 8877 and amp supply amp but neither of these work on 17
or
> 12.
>
> 73 Dave K4JRB
> [email protected]
>
>
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