Pete KE9OA wrote:
I saw an eBay listing for a Lear ADF. It looked surprisingly like a Bendix
T-12B, also known as an ADF-201B. This particular model has the tuning dial
right in the center of the front panel, and it is a solid state unit. The
only difference it that the Bendix unit uses a 140kHz I.F. I do have service
information for this model.



If the folklore passed on to me in about 1965 is correct, Motorola
bought the Lear ADF design and made it the ADF-12. Bendix got the
design from Motorola and came out with the ADF-T12-series. There
certainly are striking similarities as one might expect. Tye worst of
the lot is/was the synthesized ADT-T12D. It is an abomination. We took
the "D" out of our aircraft and re-installed a "C" model.

de K3HVG
also: N95JP

That explains why the old T-12B that I had was a Motorola unit. All of the
T-12Cs (I have five of them) are Bendix units. I did have a T-12D a while
back. What a brick! I bought it, along with a batch of KR-85s from one of
the local airports. I kept only one of the
KR-85s.........not a bad radio, but those bandswitches take a bit of time to
clean.

Pete

"k3hvg" wrote in message
...
Pete KE9OA wrote:
I saw an eBay listing for a Lear ADF. It looked surprisingly like a
Bendix T-12B, also known as an ADF-201B. This particular model has the
tuning dial right in the center of the front panel, and it is a solid
state unit. The only difference it that the Bendix unit uses a 140kHz
I.F. I do have service information for this model.



If the folklore passed on to me in about 1965 is correct, Motorola bought
the Lear ADF design and made it the ADF-12. Bendix got the design from
Motorola and came out with the ADF-T12-series. There certainly are
striking similarities as one might expect. Tye worst of the lot is/was the
synthesized ADT-T12D. It is an abomination. We took the "D" out of our
aircraft and re-installed a "C" model.

de K3HVG
also: N95JP