[Hammarlund] Interfacing an HQ-170A to Johnson Viking 1

[rbethman]

Bill,

(BTW,, I'm in Manassas!)

I can discuss the HQ-170A - BUT - not the Viking.

The HQ-170A has TWO sockets on the rear apron.  The one you will be 
dealing with is the SYSTEM socket.  It is the one, looking at it from 
the rear, that is all the way to the right - and right of the power cord.

It is an octal socket, 8 pin, like for a 6V6.  The socket NOT to be used 
is the four pin accessory socket up higher and near the middle.

Pins 3 and 4 are for muting the HQ-170A.

All Parker is going to continue to explain the Viking "Solution".

Take it away Al!

Bob - N0DGN

Bill McCourt - WF1L wrote:
> Hi Folks,
>
> I have recently purchased one of these receivers and wish to
> interface it with a Johnson Viking 1 Xmitter for a vintage AM station.
>
> I already have the DowKey TR relay.
>
> My
> question is, how to "mute" the receiver during XMIT.  Is there a bridge
> circuit across two pins of the "System" socket that should be shorted
> when in Transmit or should a receiver negative bias voltage be applied
> somewhere. I've obtained the manual for the HX-50 Transmitter to see
> what the connections to a recommended XMTR might be but I'm still
> confused.  As far as I know, there is no PTT output installed in the
> Viking XMTR either.
>