[HCDX]: more Vactrol info.

[Mark Connelly <MarkWA1ION@xxxxxxxxxx>]

I have more Vactrol-related information for prospective
K9AY loop builders and those who want remotely-adjustable
Beverage terminations.  

A circuit usable for either application can be found on
Page 12 of 15 of the PDF document for the VACT-A circuit
card.  This card uses two of the new LED-based VTL5C4's
in parallel to get an adjustable resistance range from
50 ohms (or less) up to greater than 10K.  Go to 
"http://members.aol.com/MarkWA1ION/bbl-1b.pdf " to
download the article.  You will need to have the free
Adobe Acrobat Reader program installed to view it.

This circuit works as well as the earlier incandescent
model, the VTL3A27, used on Steve Byan's remotely-terminated
Beverage.  You can see his excellent article online at
"http://www.ultranet.com/~oakridge/Beverage_info/RCT_Beverage/RCT_Beverage.html";.

VTL5C4 availability is as follows:
Allied Electronics
"http://www.alliedelec.com";

VTL5C4
EG&G OPTOELECTRONICS VACTEC

ANALOG OPTOISOLATOR Qty. In Stk.: 3831 

U / M: 1 Ea.  
Min. Order Qty.:  1 
      
1-99     $2.70 Ea. 
100-499  $2.09 Ea. 
500+     $1.70 Ea. 

Good luck !

Mark Connelly, WA1ION
<MarkWA1ION@xxxxxxxxxx> 





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