Re: [time-nuts] HP5065 - Some OP-Amp, FB and Teflon

Great story! Congratulations on the recovery and restoration. John WA4WDL > On November 28, 2017 at 1:52 PM Ulf Kylenfall via time-nuts > wrote: > > > > All, > Your comments regarding my hobby project are appreciated. > The story behind the first 5065A that I was able

Re: [time-nuts] HP5065 - Some OP-Amp, FB and Teflon

All, Your comments regarding my hobby project are appreciated. The story behind the first 5065A that I was able to bring back to life was that I encountered it when I was 13 yearsold in 1968, taking part in the schools intern programme (first experience about what a job was and what

Re: [time-nuts] HP5065 - Some OP-Amp, FB and Teflon ...

Forrest wrote: I looked up the schematic for the 5065A, couldn't find the OPA111 anywhere The LT1793 in particular is marketed as a drop-in replacement for the OPA111, although some of the specs seem worse. TI points people toward the OPA124 and OPA627 parts. In particular the OPA627 is

[time-nuts] HP5065 - Some OP-Amp, FB and Teflon ...

Here is the schematic of the new style A9. Cheers, Corby___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.

Re: [time-nuts] HP5065 - Some OP-Amp, FB and Teflon ...

Hi Some places show the 1793 in an 8 pin DIP package. *IF* it actually is available that way (Digikey shows stock), it probably would be the better package ( vs SOIC) for a low leakage application. Neither one will beat a TO package though ….. Bob > On Nov 28, 2017, at 11:41 AM,

[time-nuts] HP5065 - Some OP-Amp, FB and Teflon ...

Ulf, Forrest is correct. I'd try the LT1793. It's an SOIC but if you are making your own board that would not be a problem. It is $4.87 at DigiKey. Cheers, Corby ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] HP5065 - Some OP-Amp, FB and Teflon ...

I am *not* an expert on the HP5065... In fact, I just joined so I could learn a bit more about precision timekeeping... have various reasons for wanting a precision clock on the bench, and trying to figure things out. So, the following is based on past experience with similar replacements, in

[time-nuts] HP5065 - Some OP-Amp, FB and Teflon ...

If you are willing to take a China-risk here is a good price for lots of three of them. I've bought some stuff from this seller and it has all seemed legit and worked properly... Of courese, YMMV

[time-nuts] HP5065 - Some OP-Amp, FB and Teflon ...

Corby, Thanks for the information. I was not aware of the relocated resistor. Yes, it is the DC feed-throughs. Any thaughts on a possible replacement for OPA111? I have also duplicated the revised A7 AC-Amplifier boardusing film capacitors for the notch filters and modernOP-Amps. Since I have