Re: [drakelist] Strange TR7 Digital Board

[Joe Pyles]

In the service manual for the 5 chip board, U201 is listed as "I.C., 32X8 PROM - Amateur Band Programming". U201 is the horizontal chip with the white number stamped on it.

At 07:55 PM 3/18/2006, you wrote:

The " later " 5 chip board does not use a PROM to decode the bandswitch position. I do not know why Drake changed the design.
73, Gary