[GreenKeys] LESU loop supply for the Model 28

[Brooke Clarke]

Hi:

I've learned from Hal Communications that LESU may mean "L" for the model 28 
and ESU for "Electrical Service Unit".

In this web page:
http://www.kekatos.com/teletype/gil/M28.htm
It says "This is the Electrical-Service-Unit (LESU) for the AN-UGC-6K."  And I 
think thre's a Bi-Polar relay show.

This Model 28 brochure says the model 28 can generate either polar or neutral 
signals.  http://hans.presto.tripod.com/scan/teletype/28_02.html

Still looking for a polar loop power supply.

Have Fun,

Brooke Clarke
http://www.PRC68.com
http://www.precisionclock.com



Brooke Clarke wrote:
> Hi:
> 
> I asked HAL Communications about their LP1200 loop supply for use on the 
> 5-A stock ticker and they are out of stock and the price is extreamly high.
> http://www.prc68.com/I/WU5A.shtml
> 
> Bill Henry recomended the LESU loop supply for the Model 28.  Where to 
> find one of these bi-polar loop supplies?