The mod was added to the wiki by N5NA
73, Barry N1EU
On Sat, May 21, 2011 at 4:11 PM, CSM(r) Gary Huber <glhuber@msn.com> wrote:
> Alan, please add the following mod for the Model 253;
>
> 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 to
> seven memories on each of four switch positions (28 memories). Originally
> the voltage and pin selection was provided by the TenTec transceiver (band
> information), but
> the OMNI-VII does not.
>
> I used DXLab 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 of the relay 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.cotorelay.com/8L.pdf )
> http://www.unifiedmicro.com/decoder.html (bcd1.jpg)
> http://www.dxlabsuite.com/commander/Help/index.htm
>
>
>
> I’ve forgotten how to submit the info directly, thank you for your assistance.
>
> Best regards,
>
> CSM(r) Gary Huber - AB9M
> 9679 Heron Bay Rd
> Bloomington, IL 61705
> (309-662-0604)
> www.csm-gh.com
> glhuber@msn.com
> gary.huber@us.army.mil
> _______________________________________________
> TenTec mailing list
> TenTec@contesting.com
> http://lists.contesting.com/mailman/listinfo/tentec
>
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