Western Electric 403A & 6AK5 tube comparison and questions
Jul 26, 2010 at 9:07 PM Thread Starter Post #1 of 11

_Spanky_

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I have a few questions and I'm tryin to think of everything so I'll blurt it out:
 
The 403A looks similar to the 396A, I know they're different tubes but both have the same box and print style. I've heard the 396A was made with no price-point so it's built well, sounds great and will last a long time. My question is, would the 403A be similar in that sense?
Does anyone know how the WE 403A would compare against Tung-Sol JTL-6AK5? From what I can tell they are the same "model" as in that they are compatible with each other, is that correct?
Lastly, would using a WE 396A in a preamp/buffer and then the WE 403A in a tube amp that's connected to the preamp/buffer, would that have any kind of beneficial synergy?
 
For 6AK5 tubes, is there a better option than the Tung-Sol JTL-6AK5? I realize that tubes can sound different depending on the circuit they're used int but I'm mostly looking for general comments and answers.
 
Thanks!
 
Aug 9, 2010 at 6:05 PM Post #5 of 11
I don't have any experience with the Tung-Sol 6AK5, but just picked up a pair of Western Electric 6AK5 for my LD 1+ that I like. I've also tried Philco and RCA 6AK5 that were kind of dry sounding with thin bass. The bass using the WE version is full, but not too heavy (what I was looking for).
 
 
Sep 16, 2010 at 4:37 AM Post #6 of 11
Spanky, did you finally find some good tips on 6ak5 tubes to use?
I was looking as well for the A1, but it seems the WE 403A/B are top(?)
 
I'm trying the Raytheons first (I posted the link in the A1 thread)
 
Sep 16, 2010 at 5:35 AM Post #7 of 11
396A / 2C51 / 5670.  Different tube altogether than the 6AK5.
 
Some of the variants that can be used in place of 6AK5 tubes- EF95 / 5654 / CV4010 / M8100 / 6096 / 403A/B / 6J1
 
The Tung Sol 6AK5 are one of my favorites but also very good are Siemens 6AK5, Mullard M8100 and for Grados I like CBS Hytron.  Many to choose from this family of tubes.
 
Sep 16, 2010 at 6:00 AM Post #8 of 11
Thanks for the tip.  I'm checking the LD mkIII thread, lots of info there, too much
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So far it seem to be:
 
Mullard M8100 (CV4010)
WE 403A/B
Tung sol 6ak5
...
 
Jan 6, 2012 at 12:44 PM Post #11 of 11
Going to bump this old post up as I'm in the midst of ordering/rolling tubes in my EF2A.  Can one of you guys who knows all the details point me to a prior post or explain to me how/why different brands/styles of tubes in the same family (in this case 6AK5) can produce different sounds in an amp?  Aren't tubes essentially nothing more than AC/DC converters?
 

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