Substitute for CA3080 in Ross Compressor?

charles · February 07, 2005, 09:20:19 PM

Hi guys,

What are suitable subsititute for CA3080 in Ross Compressor?
Would JRC4558 or TI OPA2134PA work at all?

zachary vex · February 07, 2005, 09:33:21 PM

a CA3080 is not an op-amp, it's a transconductance amplifier. you might be able to shoehorn a 13600 or 13700 in there as a replacement in a NEW design, but the pinout is completely different (as are the number of pins.)

my recommendation is, use a real CA3080 if you aren't familiar with these terms.

R.G. · February 07, 2005, 09:36:14 PM

QuoteWhat are suitable subsititute for CA3080 in Ross Compressor?

LM3080 is the only pin-for-pin that I know of. The CA3080 and LM3080 are not all that hard to find.

QuoteWould JRC4558 or TI OPA2134PA work at all?

No. Quite different functions. These are ordinary opamps, not operational transconductance opamps. Won't work the same.

charles · February 07, 2005, 10:05:04 PM

Thanks for your help.

Just wanted to see if I can stick what I have lying around... ;-)

sir_modulus · February 07, 2005, 10:15:50 PM

Small Bear's open, and they have them in stock.

Cheers,

Nish

airhole · February 07, 2005, 10:24:51 PM

yay! Steve is BACK! wo hoo!

Paul Marossy · February 07, 2005, 11:53:12 PM

If your local electronics store (not RadioShack) carries NTE parts, they will probably have some CA3080 equivalents in stock. I forget what number they gave it, but it worked fine in one project I built that required a CA3080. I was able to get it locally and I got instant gratification, too.

charles · February 08, 2005, 02:26:10 AM

Yeah...I think it's NTE996 or something like that.
I wonder if there are any sonic differences between original CA3080 and NTE...
I am guessing very marginal...if any...

Paul Perry (Frostwave) · February 08, 2005, 09:06:50 AM

Quote from: charlesI wonder if there are any sonic differences between original CA3080 and NTE....

NTE aren't a manufacturer themselves.
They rebadge stuff, or order a special run from a manufacturer.. Sometimes this means that their 'equivalent' really is the part it is replacing, sometimes it just means that if you are a desperate repair guy, the component might be 'close enough'. That is how they can cover a huge number of components with many fewer NTE parts.
In the case of the CA3080, there were only two manufacturers, National Semi and Harris. And National doesn't do them any more.

Satch12879 · February 08, 2005, 09:44:00 AM

Allied Electronics has them in stock, Mouser is not carrying them anymore.

puretube · February 08, 2005, 09:48:38 AM

maybe someone mistook 3080 with 13700? :
NE5517 (Philips)
http://www.semiconductors.philips.com/acrobat_download/applicationnotes/AN145.pdf

jimbob · February 08, 2005, 10:09:32 AM

I usse the nte996 in mine and it sounds great- just like the ca3080 i bought from steve a while back. On steves site theres a ca3080 and i belive a ca3080e- big diff in price--why?

Paul Marossy · February 08, 2005, 12:49:45 PM

Yeah, that's the one - an NTE996. On mine, I can actually see that there was some kind of printing on it before the NTE stamp was applied to it. It kind of looks like a re-labeled Harris chip to me...

O · February 08, 2005, 01:06:47 PM

Quote from: Satch12879Allied Electronics has them in stock, Mouser is not carrying them anymore.

http://www.mouser.com/index.cfm?handler=displayproduct&lstdispproductid=347638&e_categoryid=131&e_pcodeid=52617

Mouser still has them... I just got 5 from them.

ragtime8922 · February 08, 2005, 10:00:07 PM

Yeah, what is the difference between the 3080 and 3080E.

Anyway, I bought a whole bunch of these when I heard they were going out of production in hopes that posts like these would escalate over the comming years to the point that I can feel like the guy that has a 1000 glass Mullard OC44's and 12AX7A's... :lol:

OK, it might end up being my kids or grandkids that get that satisfaction.

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Substitute for CA3080 in Ross Compressor?