[Central-Electronics] 200V restoration

Gutfrucht, Alan agutfruc at chicagobooth.edu
Sat Nov 21 15:15:48 EST 2020


Colin,

I am also working on a 200V and just rebuilt the VFO assembly. I made a
sketch of the bearing module and took some notes. My sketch shows a wavy
washer on each side of the brass bushing. My notes say that the
counterbored side of the bushing is installed facing out (away from the
bearing assembly).

My rubber disk was pretty dry and somewhat flattened in the area that was
up against the plastic. I just lined up the line straight up and down and
put it back together. I have no adjustment there.

Regards,
Alan, WB2FZC

On Fri, Nov 20, 2020 at 3:27 PM outlook_5F7B3C6C40B9DF07 at outlook.com <
ve7tnt at shaw.ca> wrote:

> Hello All!
>
> Doing a restoration of a 200-V S# E1604.  Took it all apart few years
> ago...now putting it back together with all new electrolytics, etc and had
> a few questions.  (should have paid a bit more attention when I took it
> apart!)
>
> I have replaced the VFO bearings/spring and is now smooth.  Wondering
> about the small copper colored backlash bushing that fits in the shaft end
> closest to the lead screw.  I did not pay enough attention when I took it
> apart....which way does it go in?  I have a spring washer that I believe
> goes in first, then the bushing which is held in by two outer clips that
> poke through the shaft.  The bushing itself is not symmetric; deeper hole
> before the threads on side compared to the other.  I am thinking it should
> go in one way or the other?  Found some images on the web but not clear
> enough to decide.  Maybe it does not matter or ?
>
> The rubber disk (sandwiched between two flat washers) that moves the
> plastic frequency alignment bezel back and forth (through front panel screw
> adjust) had disintegrated.  Any comments about the best method to repair?
> Thought about getting a small piece of rubber sheet and simply cut a circle
> and put it back together.
>
> Anybody have a spare 47.7 Mhz XTAL for 10 meter operation?
>
> I am looking forward to getting on the air with this thing.  I have a 100V
> that I use with an R390A RX.  Did the restoration on that one years ago.  I
> thought about taking it apart to look at the VFO but figured I would ask
> before I go too far with that.
>
> Thanks!
>
> Colin, VE7TNT
>
>
> Sent from Mail for Windows 10
>
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