Products > Test Equipment

Cloning the HP3325A Option 002 - HV Output

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hnjmkl:
I would always be interested in the clone of the HVO option of the 3324A, I ask the current status of this project by the interested parties seen in this forum. Greetings Franco

TERRA Operative:
Outbound international shipping from Japan is still shut down, still waiting for things to start moving again. Will make more updates when I have new news.

Jay_Diddy_B:

--- Quote from: hnjmkl on August 04, 2020, 06:22:09 pm ---I would always be interested in the clone of the HVO option of the 3324A, I ask the current status of this project by the interested parties seen in this forum. Greetings Franco

--- End quote ---

Hi,

I haven't seen the HV Option for the HP3324A. Is it the same as the HV option for the HP3325A?

Regards,
Jay_Diddy_B

hnjmkl:
I wired the proposed improved circuit on breadboard, redesigned with kicad, but it doesn't work, Q3-Q9-Q13 warm up slightly, in the absence of signal the output has no important offset. is there any error in the wiring? Immagine 2020-09-20 211101.png (23.31 kB. 951x585 - viewed 356 times.)

AlfBaz:
Did you end up finding the problem?

It simulates properly with ltspice and is quite tolerant to model variations for the various transistors.
Given that you have "breadboarded" the circuit it is most likely an issue with your physical wiring.

I've just finished a quick laying out a surface mount version of that circuit and currently verifying transistor selections.
I'm doing it on a 4 layer pcb for no other reason than to check out JLPCB's 4 layer service

P.S.
Hope you don't mind Jay :)

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