All, I have repaired a great many TR-7 transceivers over the years but I have never seen this version of the digital board. I have searched through all my manuals on the TR7 and R7 but this digital board is very different that anything I have seen before.
I am wondering if anyone on the Drake List is familiar with this or has seen this version?
This version of the digital board is from a TR7-A that I'm working on to eventually sell. It is
a very high serial number, well over 12,000, possibly one of the last in the series made. The standard digital board has 9 IC's, whereas this new version only has 5 IC's and a very different board layout.
The link below takes you to a picture of both the standard digital board and the newer version that I found. The boards works fine so I am not necessarily looking for service information but whether or not anyone else has seen this version? I checked out both versions of the TR7 manual and the R7 manual and find nothing the resembles this version board.
The link shows the standard version on top and the bottom in the strange version.
http://www.wb4hfn.com/BIN/DigitalBoard.jpg
Anyone with thoughts or ideas.
Ron Baker / WB4HFN
Check Out My Amateur Radio Website
Vintage Drake and Collins
