HA-2525 OP Amps

Ardvaark · 18th July 2009, 04:38 PM

Probably a long shot here. I just found a couple tubes of these in my overstock. Decent looking specs, anyone at all have any experience with using these? Good, bad, purgable?

Ardvaark

jbau · 18th July 2009, 05:18 PM

Can't answer your questions, and I've never seen one in audio gear, but I've seen them in lots of test equipment from that period, especially brickwall and programmable filters. And HP used it (or one in the same 25xx series) in the 239A and 339A oscillator.

18th July 2009, 04:38 PM	#1
Ardvaark diyAudio Member Join Date: Nov 2007	HA-2525 OP Amps Probably a long shot here. I just found a couple tubes of these in my overstock. Decent looking specs, anyone at all have any experience with using these? Good, bad, purgable? Ardvaark

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18th July 2009, 05:18 PM	#2
jbau diyAudio Member Join Date: Apr 2009	Can't answer your questions, and I've never seen one in audio gear, but I've seen them in lots of test equipment from that period, especially brickwall and programmable filters. And HP used it (or one in the same 25xx series) in the 239A and 339A oscillator.

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