The VCO is a separate device.  Mine has a quarter-inch male three-conductor 
jack on it.  The ground sleeve is open.  The tip and ring terminals are 
used.  I put a quarter-inch female jack on the amp and run the wires from 
that to the meter.

Using that methodology, you can put other jacks on other metered equipment 
and swap the VCO around if needed, or build a switchbox to switch the output 
to whatever device you want to cmonitor.

Take a look at the SHARC audible meter article from the ARRL website, since 
this has a comparator circuit so you can set a reference level for 
current-critical applications
www.arrl.org/files/file/Technology/tis/info/pdf/7904022.pdf


Steve, K8SP
----- Original Message ----- 
From: "Michael Ryan" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, March 18, 2014 4:32 PM
Subject: Employing a VCO


> Hi Steve:=20
>
> When employing the VCO, where does it sit?=20
> Is it mounted internally and how do you turn it off and on for tuning =
> purposes?=20
> I'm very interested in this because I think this can be adapted into =
> Tom, W8JI's TOF, a device for monitoring grid current with the aid of a =
> lamp that lights when the max grid current is reached.=20
> Tom is a little bit of an expert on the Ameritron 811/80B and 82 amps.=20=
>
> I wrote him this morning to see if this device could be adapted to use a =
> VCO instead.=20
>
> 73:=20
> Mike VO1AX=20