[Central-Electronics] Central Electronics 200V

[GRANT YOUNGMAN]

On Aug 19, 2014, at 10:38 PM, Mike Saeger <mike at thesaegers.com> wrote:

> 1. I am working on a 200V. I've got it working, but with the carrier null
> pots at their limit I still have several watts of carrier (around 50 watts
> input on the meter).

Does the carrier null out following the manual procedure with the mode switch in the NULL position?  If you’re looking at the “input” meter in any other mode position, you’re just seeing what is essentially the resting plate current of the finals.  It does not indicate output.  Now if you’re seeing RF output on a Bird or something, that’s a different issue.

> 
> Is there another adjustment that will move the carrier null toward the
> center of the carrier null pots?
> 
> 2. The fan is missing. How important is it?

If there’s no fan in the final cage, yes, you should have some airflow there.

> 
> 3. This 200V has two C-Cells in series with 3 wires connected (+3v, +1.5V ,
> Gnd). The 3 wires go through a grommet at the bottom of the audio limit
> plug-in module. Any idea what kind of a mod this was?

This was an early way of replacing the small mercury battery cells that were originally in the module.  You should open up that module and check for battery acid damage around the old battery holders.  There is an update that eliminates the need for the batteries and is a far better solution — http://www.ce-multiphase.com/tech-info-limiter.html

Grant NQ5T