This sounds very similar to the encoder in the Ten Tec 1220 rig. It has
three pins, +5 volts, Phase 1 and Phase 2. On the 1220 the two phases are
pulled to ground through 47K resistors and fed directly into the
microprocessor. I would assume that they are just pulsing the two phases to
Vcc. The 'clicks' on the encoder are fairly wide (about 5 degrees) and may
prove too coarse for an HF rig Tuning knob. Remember the 1220 just tunes in
5 KHz or 2.5 KHz steps.
The Ten Tec part number is: 32112 You would have to call them for the Price.
Can't be much as the whole kit is only $200.
If you want more info I can make some measurements.
George
<snip>
>It will probably cost around 40-50 dollars.
>
>You want the Oak Grigsby encoder, model 90Q125-02-00245.
>
>The schematic is even simpler:
>
>Encoder: - = (ground)
> empty = nothing
> A = (phase 1)
> + = (+5v)
> B = (phase 2)
>
>(-, A, +, B = pin identifiers on the encoder)
>
>DB25(to radio): 1 and 14 = (ground)
> 6 = (Phase 1)
> 8 = (Phase 2)
> 16 = (+5v)
>
<snip>
>
>Dale Martin, KG5U
>kg5u@hal-pc.org
>http://www.hal-pc.org/~kg5u
George Ar?hur Talbo? V73GT AH8H ex WB6VPS ZD8GT ZD7GT ZD9CR
Raytheon Range Systems Engineering Support
United States Army Kwajalein Atoll
Roi-Namur Island, Marshall Islands
9 Deg 23' 47" North 167 Deg 28' 31" East
Islands On The Air IOTA OC-28
Pacific Inter Island Net 0800 UTC 14.315 USB Nightly
Other Times available by Schedule
Mailing address.
George Ar?hur Talbo?
Box 8358
APO, AP 96557-8358
United States of America
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