-------- In message <[email protected]>, Magnus Danielson writes:
>Ehm, eh... that transistor pair you have there. How *tight* together is >really the transistors thermal connection? I bet not all that good. They're in the same TO5, but I don't know if they're the same die. I have about 45-50 microvolt difference between their bases. >Anyway, the take-away is that you should look at that discrete >op-amp and see if it is not causing you the thermal dependence you are >trying to locate. Maybe replace it with a more modern op-amp like the >741 or something (irony may have been used). Yes, that is absolutely the plan. The integrator and AC-amplifier in the HP5065 gets upgraded to chip op-amps in later revs, but this one does not. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 [email protected] | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
