That's why I said "can" and not "always".

Sometimes the base code (when there is one) along with the internals can help. I've found this list useful for a couple tubes I was tracking down: https://tubemaze.info/eia-codes-to-id-tubes/

So the V1 I purchased a while back was received with a broken 6SN7 pin #6 socket on one side that I overlooked. I started looking into a replacement socket and ultimately decided on a pair from Aliexpress that also included a free PCB board. I ordered them am was very happy with what I received...

I currently have a V1 and V2 on hand. The V2 was picked up brand new from Woo about 2 months ago. I have used Jantzen Superior Z caps in a handful of amps and decided to install them in the V2. I have been very pleased with their neutrality and believe they offer serious bang for buck. That...

Bottlehead Single eXperimenters Kit 3.0 is excellent with low imp phones. It has output transformers and will drive practically any headphone. It is a fun build too. I really enjoy mine with HiFiMAN planars, Grado, Senns, and Beyers. Will drive those Fostex splendidly! I also use Denon AH-D7000...

I have tried my Topping E70V using both the XLR and RCA into the WA22 and noticed no difference. My everyday use for WA22 is in a vinyl setup with the output from a Hagerman Trumpet MC directly into the WA22 by either RCA or XLR (using RCA to XLR interconnects .... yes I know it's not balanced)...

I just locally picked up a NOS Chatham 5R4WGA and NOS Chatham 5R4WGB (yellow stencil on glass with identical internals) for $8 apiece for use in my WA22. Both are absolutely great. Feels like I could toss one down my street, go pick it up and put it back in the amp and it would play fine. From...

here is some info: https://www.head-fi.org/threads/woo-audio-wa22-amp-owner-unite.826386/page-159#post-17917620

There is great info in the manual. You can find one online to download.

I just landed a WA22 Gen 1 and have been messing around with it for about a week. It is quite a step up from my Gen 1 WA2 (which is also stellar). Ordered a fresh pair of HD650 directly from Sennheiser and it's just unbelievable. Had the original HD800 but hated it and sold it long ago, love the...

....................

.............................

.........................

.....................................

There is a fuse inside that may have blown. If you are under warranty, best to send it in. Not sure if anyone attempted a fuse change yet, but beware of deadly current inside if thinking about it.

..................

......................

I handcraft my "fuses" from this high quality "F.T.F.F." 12 gauge solid core copper ....

.......................

........................

Still trying to figure out why a case is needed. Just bring that badboy straight on! :footprints: Light 'er up! :bulb:

I wonder if they would just say "Oh thank God, it's just those lousy GE Stock tubes .... no worries" .... :sob:

My guess? .... it would not be good Jon .... :sweat_smile:

I bet people would sh@t their pants if I broke out my Crack and I laid 'er down on the tray table .....

BH "Airline" ..... like the sound of that .... replace those stupid 5V USB's on jets with 120V AC recep's ..... YES!