[GreenKeys] Looking for a stand-alone Loop Power Supply

[Bill Henry]

Hello David,

When did you send your email to HAL?  I am sorry that we missed your 
inquiry.  I do not know how that could have happened.  I answer all 
email and keep copies of all received and sent messages.  I do not 
find your name in any of my past directories - back to 1997.

The LP-1200A is built to order, minimum order of 25 pcs, shipment 120 
days after receipt of order and payment.  The MSRP price is 
$2,500.00.  The 25 pc price is $1,435.50 ea.  This product dates from 
1986 and is sold primarily to government agencies and export 
customers.  We do not carry shelf-stock of this product as the 
cabinet, circuit board, and power transformer components used are 
custom designed and must be purchased in quantity.

The suggestion that you purchase a used ST-6, ST-5000, or ST-6000 and 
use the internal loop power supply in each demodulator is a good 
one.  There have also been numerous mentions of low cost loop supply 
circuits on this reflector over the last 5 or 6 years.

Best regards,
George W. (Bill) Henry (K9GWT)
President

At 02:26 PM 6/28/2008 -0500, David Effa wrote:
>Hi Greenkeys,
>
>I am looking for a stand-alone Loop Power Supply that can convert
>RS-232 or MIL-188-114 signals into high voltage current loop signals.
>I would also like it to have a motor relay with auto-start
>functionality.  Commercially on the web I found the HAL Comm. sells
>the LP1200A which fits the bill perfectly.  I did e-Mail HAL to see if
>they had or could part with an old demo or other such type units unit
>at low cost, but I had no reply.  But I did not expect one either.  I
>know they just deal with commercial entities and in large quantities
>of units.  I have not seen anything like this show up under eBay or
>found any kits that I could build.  I do not have many tools so
>building a chassis for a kit board would be a problem.
>
>Thanks,
>
>Dave, WD9ITR
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