[TenTec] Commander - Unified Microsystems BCD-10 - Model 253

[CSM(r) Gary Huber]

Thanks Dave, with the price of the UM BCD-10 less than $20 and the cost of 
the 8L01 at $1.72 each for ten, the cost of the interface is about $40 (plus 
cables (if you don't have them), and connectors).  In doing the research for 
the project, I could not find anything "ready made" that I could with any 
certainty determine would drive the Model 253 memory inputs. The Top Ten 
Devices and  Array Solutions band decoders appear to need a set of relays 
and I could not see spending $155 to $255 and then having to build adapter 
cables and a relay interface to do what I did for $40 and a few surplus 
items from my junk box.

Could you add the UM BCD-10 to the Commander band decode info?


73 es DX,

Gary - AB9M

-----Original Message----- 
From: Dave AA6YQ
Sent: Friday, May 20, 2011 6:08 PM
To: CSM(r) Gary Huber
Cc: TenTec Reflector ; w9aml at yahoogroups.com ; 
Ten-Tec-Omni-VII at yahoogroups.com
Subject: Re: [TenTec] Commander - Unified Microsystems BCD-10 - Model 253

Nice work, Gary!

   73,

         Dave, AA6YQ

-----Original Message-----
From: CSM(r) Gary Huber [mailto:glhuber at msn.com]
Sent: Friday, May 20, 2011 6:16 PM
To: Dave Bernstein
Cc: w9aml at yahoogroups.com; Ten-Tec-Omni-VII at yahoogroups.com; TenTec
Reflector
Subject: Commander - Unified Microsystems BCD-10 - Model 253


Dave,

I recently completed a band decoding interface for the TenTec model 253
Automatic Antenna Coupler. The 253  requires a voltage of +10 to +14 VDC at
3 ma on one of seven pins to select the preset tuning information for up
seven memories on each of four switch positions (28 memories).  Originally
the voltage and pin selection was provided by the TenTec transceiver, but
the OMNI-VII does not.

I used Commander to provide BCD via the computer parallel port to the
(solder pads ABCD) UM BCD-10, the band is decoded (J1 1-9) which then pulls
down pin 2 of the selected (band) 8L01 DIP Relay, which upon contact closure
outputs +12 VDC on pin 14 to one of seven Band Select pins on the #86027-26
to the 15 pin Molex® on the rear panel of the model 253 tuner. Pins 6 and 8
of the 8L01 DIP Relay are at +12 VDC supplied by +VR of BCD-10. The UM
BCD-10 receives +12 VDC from the OMNI-VII Power Supply.

references:
Model 253 Operators Manual pages v, 2-4, 2-5
8L01-DIP-Relay-PDF page 27
http://www.unifiedmicro.com/decoder.html (bcd1.jpg)
http://www.dxlabsuite.com/commander/Help/index.htm

Best regards,

CSM(r) Gary Huber - AB9M
9679 Heron Bay Rd
Bloomington, IL 61705
(309-662-0604)
www.csm-gh.com
glhuber at msn.com
gary.huber at us.army.mil
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