the remote VFO for the Corsair also uses the segmented
bargraph and provides Dual receive. However, it does not use
the worm gear arrangement. The bargraph is simply a low
resolution frequency counter. I won't go into details here but it
is a clever arrangement to be sure.
-73-
-Lee-
On 19 Jun 2002 at 0:05, 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
>
|