[ARC5] Netting Switch

[Jay Coward]

Thanks for the clarificatiom Mike. Somehow I thought when in the Monitor mode the TX was in the "Tune" mode also thus not overloading the RX.
 Jay


-----Original Message-----
From: Mike Morrow <kk5f at earthlink.net>
To: arc5 <arc5 at mailman.qth.net>
Sent: Sun, May 26, 2013 3:08 pm
Subject: Re: [ARC5] Netting Switch


Jay wrote:

> In the ARC-8 setup, when in Monitor mode, I don't think
> HV is applied to the 813 and 811's.

Yes, it is.

> I may be mistaken though.

Yes.

The MONITOR-NORMAL switch in the SCR-287-A and AN/ARC-8 is
a DPDT switch which performs the following functions ONLY:

NORMAL Position - When the transmitter is keyed:
(1)  HV to the screens of the second RF and the first and 
     second IF stages of the BC-348-* is interrupted.
     (The BC-348-* is electrically muted.)
(2)  Sidetone AF output generated by the transmitter is
     connected to the interphone system.
     (Headphones plugged into the interphone system will
     hear the transmitter-generated sidetone.)

MONITOR Position - When the transmitter is keyed:
(1)  HV to the screen of the second RF and the first and 
     second IF stages of the BC-348-* is *NOT* interrupted.
     (The BC-348-* is fully functional.)
(2)  Sidetone AF output generated by the transmitter is
     *NOT* connected to the interphone system.
     (Headphones plugged into the interphone system will
     hear the AF output of the un-muted BC-348-*.)

That's it.  The operation of the transmitter is completely
unaffected by the MONITOR-NORMAL switch.

In either switch position, the BC-348-* antenna terminal
is grounded by the transmit-receiver relay in the transmitter.
Regardless, in MONITOR the BC-348-* gets a very strong dose
of what's coming out of a transmitter that has much higher
output than a command set transmitter.

Mike / KK5F
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