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ZP3 front tube (Read 7013 times)
Archie
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ZP3 front tube
05/12/20 at 23:31:46
 
I just had my Raytheon 12AX7 in the front spot go bad.  I like these tubes but I'm not seeing anything reasonable on ebay right now.  Can anyone recommend tubes they like for this spot?  I'm not into high dollar exotic.  $20-ish would be great.
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Geno
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Re: ZP3 front tube
Reply #1 - 05/13/20 at 00:27:41
 
Adam, I read good reviews on these about a year ago, and have been very happy with them.

GE JG-5751 triple mica black plates.

This is an example of what they can be found for on eBay:

https://www.ebay.com/itm/392685176721
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Archie
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Posts: 2731
Re: ZP3 front tube
Reply #2 - 05/13/20 at 00:55:10
 
Thanks Geno.  I bought this one.  Seemed to look okay.

https://www.ebay.com/itm/373013255031
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ZLC
Technics 1200G TT w/ Ortofon Jubilee MC cart
ZMC1
ZP3 (25th A Mods)
ZR2 (25th A Mods)
CSP3 (25th A mods)
ZMA (25th A mods)
Homemade Big Betsy Speakers (F15s)
Silver Cabling
DIY Isolation platforms under amps & TT.
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Geno
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Without music, life
would be a mistake.

Posts: 1988
Re: ZP3 front tube
Reply #3 - 05/13/20 at 02:05:53
 
Good deal!
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(2)SE84UFO(Balanced Monoblocs) OR Sansui AU-222
Crown sub amp
Cambridge Audio CXN(ModWright) • ZBIT
SL-1210MK5(KAB Mods) Soundsmith Aida MKll cart • Darlington Labs MP-7
Otari MX5050-Bll2 R2R
ZLC Power Cond.
Lii Audio PT-10/W-15 in open baffles
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Archie
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Posts: 2731
Re: ZP3 front tube
Reply #4 - 05/14/20 at 01:18:38
 
I just found this review of 12AX7 tubes.  The Raytheon and GE are both highly regarded.

https://oldstockaudio.blogspot.com/2011/08/12ax7-black-plate-review-usa-tubes-as...
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ZLC
Technics 1200G TT w/ Ortofon Jubilee MC cart
ZMC1
ZP3 (25th A Mods)
ZR2 (25th A Mods)
CSP3 (25th A mods)
ZMA (25th A mods)
Homemade Big Betsy Speakers (F15s)
Silver Cabling
DIY Isolation platforms under amps & TT.
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Geno
Seasoned Member
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Without music, life
would be a mistake.

Posts: 1988
Re: ZP3 front tube
Reply #5 - 05/14/20 at 04:24:05
 
Cool.  Below is the long article I read about a year ago that got me to try the GE’s. Also tried the RCA clear top 12AU7 because of this article. Use the table of contents at the top - 12AX7 Part 3 for summary, and the very first part that evaluates the 12AU7. I use the black plate 5751’s in the first 2 spots, and the RCA clear top / side getter for the third.

https://www.audioasylum.com/scripts/d.pl?audio/faq/joes-tubes.html#12AX7-3
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(2)SE84UFO(Balanced Monoblocs) OR Sansui AU-222
Crown sub amp
Cambridge Audio CXN(ModWright) • ZBIT
SL-1210MK5(KAB Mods) Soundsmith Aida MKll cart • Darlington Labs MP-7
Otari MX5050-Bll2 R2R
ZLC Power Cond.
Lii Audio PT-10/W-15 in open baffles
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Archie
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Posts: 2731
Re: ZP3 front tube
Reply #6 - 05/31/20 at 18:10:49
 
I like this GE tube so much I just bought two more, NOS, on ebay.

Thanks Geno!
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ZLC
Technics 1200G TT w/ Ortofon Jubilee MC cart
ZMC1
ZP3 (25th A Mods)
ZR2 (25th A Mods)
CSP3 (25th A mods)
ZMA (25th A mods)
Homemade Big Betsy Speakers (F15s)
Silver Cabling
DIY Isolation platforms under amps & TT.
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Geno
Seasoned Member
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Without music, life
would be a mistake.

Posts: 1988
Re: ZP3 front tube
Reply #7 - 05/31/20 at 20:55:12
 
I’m so glad they worked good for you, Adam. I need to get a few more myself. Wink
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(2)SE84UFO(Balanced Monoblocs) OR Sansui AU-222
Crown sub amp
Cambridge Audio CXN(ModWright) • ZBIT
SL-1210MK5(KAB Mods) Soundsmith Aida MKll cart • Darlington Labs MP-7
Otari MX5050-Bll2 R2R
ZLC Power Cond.
Lii Audio PT-10/W-15 in open baffles
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Showme
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Posts: 302
Re: ZP3 front tube
Reply #8 - 06/17/20 at 22:39:08
 
I just received a GE JG-5751 triple mica black plate based on what I read here. It really sounds so good I’ll look for another. Thanks.
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Archie
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Posts: 2731
Re: ZP3 front tube
Reply #9 - 06/17/20 at 23:29:07
 
Loving mine!  Thanks Geno.
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ZLC
Technics 1200G TT w/ Ortofon Jubilee MC cart
ZMC1
ZP3 (25th A Mods)
ZR2 (25th A Mods)
CSP3 (25th A mods)
ZMA (25th A mods)
Homemade Big Betsy Speakers (F15s)
Silver Cabling
DIY Isolation platforms under amps & TT.
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Geno
Seasoned Member
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Without music, life
would be a mistake.

Posts: 1988
Re: ZP3 front tube
Reply #10 - 06/18/20 at 16:58:54
 
Ya'll don't forget too, to try an RCA clear top 12AU7 in the third spot. Another affordable tube that sounds really good.
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(2)SE84UFO(Balanced Monoblocs) OR Sansui AU-222
Crown sub amp
Cambridge Audio CXN(ModWright) • ZBIT
SL-1210MK5(KAB Mods) Soundsmith Aida MKll cart • Darlington Labs MP-7
Otari MX5050-Bll2 R2R
ZLC Power Cond.
Lii Audio PT-10/W-15 in open baffles
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Showme
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Posts: 302
Re: ZP3 front tube
Reply #11 - 06/18/20 at 22:02:10
 
Thanks Geno I’ll look for the 12AU7. It seems the JG-5751’s are creeping up in price since you guys got yours.
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Geno
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Without music, life
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Posts: 1988
Re: ZP3 front tube
Reply #12 - 06/19/20 at 02:35:22
 
The secret may be out. From now on, just keep this info between us. 🤐
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(2)SE84UFO(Balanced Monoblocs) OR Sansui AU-222
Crown sub amp
Cambridge Audio CXN(ModWright) • ZBIT
SL-1210MK5(KAB Mods) Soundsmith Aida MKll cart • Darlington Labs MP-7
Otari MX5050-Bll2 R2R
ZLC Power Cond.
Lii Audio PT-10/W-15 in open baffles
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Showme
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Posts: 302
Re: ZP3 front tube
Reply #13 - 06/21/20 at 16:42:15
 
OK Geno, another JG-5751 is on the way as well as the clear top 12AU7. I’ve got so many 12AU7’s but not that one. There cheap so I guess one more won’t hurt.
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Ace-Tone
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Re: ZP3 front tube
Reply #14 - 03/19/21 at 00:25:00
 
Instead of the 12AX7 has anyone ever used a 12BZ7 in the 1st or 2nd position...or, in both positions at once? Basically, can the 12BZ7 be used?
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