TenTec
[Top] [All Lists]

[TenTec] The Delta External VFO

To: <tentec@contesting.com>
Subject: [TenTec] The Delta External VFO
From: jmerrill1@adelphia.net (John L Merrill)
Date: Tue, 18 Jun 2002 19:50:28 -0400
Steve Ellington wrote:
> I just got a nice looking external VFO for my beloved 580 Delta. It appears
> to be in mint condition but like just about all old TT equipment I've ever
> bought, the PTO needs a grease replacement. In fact, this pto is totally
> frozen. So much for truth in advertising. I gave up on that a long time ago!
> Now here's the cool thing about this VFO....The frequency read out isn't a
> dial pointer using a string and elastic as I expected, instead, it's a bar
> graph with each square representing a 50khz range. This must be the only
> TenTec product like this. Does anyone know of another?
> They accomplished this by installing a worm gear on the back end of the pto
> shaft which turns another gear on a pot. The pot's resistance causes the
> display to change.
> The external vfo on these old rigs is really state of the art. You can
> listen to two different frequencies at once and with the various switches,
> make the ext. vfo either xmt or rx or both or reverse the whole thing.
> So now I've got a project and the part I'm not sure about is how to remove
> that little worm gear's pin from the pto shaft. I'ts very very tiny. Maybe a
> paper clip, needle...? Any suggestions?
> 
> Steve
> N4LQ
> 
> 
> 
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
> 

I think the CorsairI/II ext VFO's were like that. However the bar graph 
readout( not the ext vfo) drifted dramatically.

John N1JM


<Prev in Thread] Current Thread [Next in Thread>