[Central-Electronics] Restore CE100V

[K6JEK]

You have to visit Nick Tusa's website.  It is a fountain of information 
on the 100V.  Nick Tusa himself is the guardian angel for all 100V's on 
the planet.  He has expertise and parts and will work on them should 
you need the help:

http://www.tusaconsulting.com/

The stuck VFO is a well known and nearly universal problem.  Follow the 
rebuild procedure on Nick's site and you should be fine.  I found that 
switching the springs as he suggested really helped.

The other problems with 100V's are well known.  The Mod caps should be 
replaced with matched caps.  There are some notoriously bad little 
white chemtronix  caps that should be replaced.  Whatever you do, be 
sure to get the selenium rectifier out of the circuit.  These things 
catch fire.   Almost everyone replaces the batteries in the limiter 
circuit with anti-parallel zeners or anti-parallel strings of 1N4148's. 
  You might well need new electrolytics.  I can give you more detail on 
all of this but I bet you won't need to hear from me after you've 
looked at Nick's site.

The 100V is a glorious transmitter.  Congratulations.

Jon, K6JEK

On Feb 8, 2005, at 2:06 PM, Radra wrote:

> Hello everyone.  I am brand new to this list.  I will be restoring a 
> CE100V
> that has been sitting in a closet for about 40 years; used it when I 
> was
> kid.  Want to do a good job so am asking for advice.  The 100V is in 
> very
> good condition, considering its age and ignoring the dust, and is 
> unmodified
> in any way.  The 100V serial number is E 166.  I have the following
> literature:
>
> "Instruction Manual Model 100V Exciter-Transmitter", P215, 7-15-59.
> "Mixer Change", 68.1, 12/14/60
> "Procedure to Modify Model 100V for Improved Suppression of Unwanted 
> Mixer
> Products", February 1961.
> Large fold-out schematic (feels rather delicate), 7-17-59.
>
> I am an EE specializing in RF and have access to a lab.  The following
> problems are evident:
> 1. VCO tuning knob is extremely stiff; I assume the lubricant has
> deteriorated.
> 2. Fan is difficult to turn; I also assume the lubricant has 
> deteriorated.
> 3. Batteries in limiter are corroded.
> 4. Meter and frequency dials are darkened in color.
>
> Have not applied power to it yet.  Does the literature I have provide 
> enough
> info to do a complete alignment?  Where do I start?
>
> Lyman Hays
> K7LH
>
>
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