[TenTec] DIY VFO jumper for Omni B

[GARY HUBER]

Neil, I no longer have my OMNI-C and ext VFO but I recall it had the same 
rear panel ext VFO and accessories connection as my Corsair-II.  I cannot 
find the factory plug and the Corsair-II and ext VFO  are not easily turned 
around for viewing the connector at the moment.  If it work as is, not to 
worry. Good news on the short jumper.


73 & DX,
Gary - AB9M

-----Original Message----- 
From: Neil Martinsen-Burrell
Sent: Monday, April 07, 2014 9:20 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] DIY VFO jumper for Omni B

A very short piece of wire with two phono plugs on the end has done the
trick!  There is no more display instability on transmit.  The cord I had
been using was 3 or 4 feet long so it could have been picking up some RF,
especially on bands where my antenna is close to the radio.

The radio didn't come with a jumper plug for the accessory connector but it
appears to work in spite of that.  Do I need to short two of the pins on
that connector together?  I can't tell from the schematic which two pins
you are referring to.  I see +REG coming from the IF-AGC board, but I don't
see a connection between the PTO and the accessory connector.  Can you be
more specific?

-Neil KD0UKC




On Mon, Apr 7, 2014 at 8:51 PM, GARY HUBER <glhuber at msn.com> wrote:

> The jumper needs to be short, maybe a three inch piece of insulated #14
> formed to a U with phono plugs soldered on. It sounds like the transmit or
> receive offset switch is on.  The other thing to consider is the
> accessories molex connector should have a plug with a jumper from the +
> regulated line to PTO enable.
>
>
> 73 & DX,
> Gary - AB9M
>
> -----Original Message----- From: Neil Martinsen-Burrell
> Sent: Monday, April 07, 2014 8:03 PM
>
> To: Discussion of Ten-Tec Equipment
> Subject: [TenTec] DIY VFO jumper for Omni B
>
> Can anyone tell me what the external VFO jumper for an OMNI B should look
> like?  When I bought the rig, it came with the external VFO which I no
> longer have.  Now to make the rig work, I think I need to replace this
> jumper.  I have tried just using a RCA cable that I had around the shack,
> but when I transmit, the displayed frequency jumps around wildly, so I
> don't think that is right.
>
> I have some RCA connectors and some wire, but I don't know what exactly I
> am trying to make.  Can someone offer a description or a picture of what
> the original external VFO jumper looked like so I can attempt to duplicate
> it?  Or failing that, can someone explain why my simple RCA cable doesn't
> work?
>
> Thanks for any help you can offer.
>
> -Neil KD0UKC
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