30L15 / PCC805 - What can I use them for?

poynton · 6th March 2008, 09:45 AM

What can I use these for ??

Any good for audio ?

Andy

poynton · 7th March 2008, 09:34 AM

ilimzn · 7th March 2008, 11:49 AM

Seems the same as PCC/ECC85. It's been used in several designs, notably EAR, but it is actually not very linear, almost like a variable mu triode. This means it could find use as a LTP (phase splitter...), cathode folower. A usably linear operating point may be found for small signal amplification, o it could be used in circuits where some complementary distortion cancelation scheme is at work. In other words, probably not your first choice for use in audio. I actually have over a hunderd brand new Telefunken PCC85s waiting to find some use...

poynton · 7th March 2008, 06:24 PM

So pretty useless then ??

What did EAR use them in ?

Andy

KaDe · 8th March 2008, 01:01 PM

I have an experimental PCC84, PCC85 line-stage cooking in my breedbox at the moment, but have never seen a PCC805 before.
From the Vademecum: http://www.mif.pg.gda.pl/homepages/frank/short/053/0/088.pdf these PCC805 look promising.
Send me some couples to evaluate if you like.

6th March 2008, 09:45 AM	#1
poynton Magneto the Gravity Man diyAudio Member Join Date: Mar 2005 Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)	30L15 / PCC805 - What can I use them for ? What can I use these for ?? Any good for audio ? Andy

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7th March 2008, 09:34 AM	#2
poynton Magneto the Gravity Man diyAudio Member Join Date: Mar 2005 Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)

7th March 2008, 11:49 AM	#3
ilimzn diyAudio Member Join Date: Feb 2005 Location: Zagreb	Seems the same as PCC/ECC85. It's been used in several designs, notably EAR, but it is actually not very linear, almost like a variable mu triode. This means it could find use as a LTP (phase splitter...), cathode folower. A usably linear operating point may be found for small signal amplification, o it could be used in circuits where some complementary distortion cancelation scheme is at work. In other words, probably not your first choice for use in audio. I actually have over a hunderd brand new Telefunken PCC85s waiting to find some use...

7th March 2008, 06:24 PM	#4
poynton Magneto the Gravity Man diyAudio Member Join Date: Mar 2005 Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)	So pretty useless then ?? What did EAR use them in ? Andy

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