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

[Dave AA6YQ]

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