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Post subject: Best 12ax7/7025 brand for reliability..
Posted: Fri Dec 05, 2014 11:42 am
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Hobbyist
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Joined: Fri Dec 05, 2014 11:40 am
Posts: 17
Hi,
I'm about to buy some spare 12ax7/7025 tubes
from a local seller..
For low microphonics, gain & long life reliability
what are the best choices in the following list I'm offered:

Sovtek 12AX7WA/7025
12AX7/6N2P
RCA 12AX7 Black Plate
12AX7 Grey Plate
Westinghouse 12AX7 Black Plate
12AX7A/7025A Grey Plate
GE 12AX7A/7025
12AX7WA
12AX7WA Grey Plate JAN
12AX7 Black Plate
12AX7 LONG Grey Plate
Tung-Sol 12AX7 D-GETTER
Sylvania 12AX7WA JAN
12AX7 Grey Plate
Rogers 12AX7
Amperex 12AX7A/ECC83
Brimar ECC83/12AX7

Thanks !


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Post subject: Re: Best 12ax7/7025 brand for reliability..
Posted: Fri Dec 05, 2014 6:26 pm
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Rock Star
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Joined: Tue Mar 01, 2011 3:10 pm
Posts: 5646
Location: Gateway to the West
Any of these from your list will be excellent choices. I put an asterisk on my three favorites and ones I have had personal experience with. They were/are quite reliable, very long lasting, have even gain and good balance from tube to tube. In fact score as many as you can of the NOS.

RCA 12AX7 Black Plate*
12AX7 Grey Plate
Westinghouse 12AX7 Black Plate
12AX7A/7025A Grey Plate
GE 12AX7A/7025*
12AX7WA Grey Plate JAN
12AX7 Black Plate
12AX7 LONG Grey Plate
Tung-Sol 12AX7 D-GETTER
Sylvania 12AX7WA JAN*
Amperex 12AX7A/ECC83
Brimar ECC83/12AX7

HTH

T2

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Post subject: Re: Best 12ax7/7025 brand for reliability..
Posted: Sat Dec 06, 2014 12:56 am
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Rock Star
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Joined: Sat Jul 03, 2010 2:18 pm
Posts: 6544
For long life, consistent tone... Raytheon mil spec black plates with orange printing are some of the finest tubes. Even the Japanese yellow labeled ones are excellent tubes.

Strong testing RCA 7025 are great tubes. As most Fender amps are designed around tube.

Another tube to look for... Tesla E83CC. Gold or steel pins. "32" on tubes are the best.

Best of the latest made 12AX7's, IME:

The Gold Lion (Russian made) ECC83/12AX7/B759. PSVANE 12AX7 (Chinese made). The Gold Lion esp sound good in Fender amps. The PSVANE have more of a classic Mullard (Blackburn, UK) tone and maybe better in Marshall of Vox amps.


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