HP-97 sudden death

[PANAMATIK]

(12-27-2014 01:21 PM)wine+dine Wrote:  With the LC connected, I do get 733 kHz oscillation on pins 13/14 but alas, no other digital activity anywhere. Phi 1/2 float high to 4-6 V and slowly fall down below 0.5 V when loaded with 2k2.
Doesn't look so good I guess ...
--Peter

Doesn't look good for your ACT.

But there is hope even for the HP-97. I desoldered the ACT of my fully working HP-97 for experiments with the new ACT and its already partially working. Its a challenge, but I'm confident I can help you in a few month. If I had more time, it could be faster.

Bernhard