Western Electric 421A

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3 thoughts on “Western Electric 421A

  1. This tube is end of the road for people that have amps that use 6as7 or 5998. There are a lot of discussions on the web about this tube and that it’s just a re-brand of Tung-Sol 5998. I have to state with absolute certainty that this is not a re-brand, but a very unique tube. It has a few similarities with 5998, for example plate structure looks the same, but there are a lot of things that are quite different. First, getter is located on the bottom for WE where Tung-sol has the getter on the top (this might seem as a small thing, but it is actually quite important since getter material, despite third mica gets all over the place during application and since Barium is a metal, it reduces tube performance). Second, plate color is different with WE having carbon black plates instead of shiny black like Tung-sol. Thirst and the most important, the sound is different. The general sonic signature is similar, but WE exhibits better bass response and overall dynamics and adds much more air and layers of details to the sound. These are getting very rare by minute and becoming extremely expensive. HIGHLY RECOMMENDED.

  2. Tried to do a blind rolling of the WE 421A vs Tung-Sol 5998 with my friends and the winner was, with everybody agreeing, WA 421A. The delicacy and the details of the tube took everybody aback. It passed in quality practically any tubes in 300B tube amp that we tried after that, as well. Nobody cared about 300B after experiencing 421A

  3. Just got the 421a and although not fully burned in, yeah I got it NOS 😉 I can tell this is gonna be a special tube. My usually centered stage HD6XX sound like normal headphones did back in the 70’s , freakn awesome.

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