bpiotrow13
1000+ Head-Fier
Same with me, once I had themIn any event, you are right about WA3’s musicality. I actually prefer the WA3 to its bigger OTL sibling, WA2.
Same with me, once I had themIn any event, you are right about WA3’s musicality. I actually prefer the WA3 to its bigger OTL sibling, WA2.
i'm not sure the exact vintage of the tubes, this is what the seller put in the ad:• What tubes are you using in WA3? I have found that I certainly prefer a variety of ECC81 / 12AT7 tubes, with Pulse Tube Store adapters, over ECC88 / 6922 / 7308.
• In any event, you are right about WA3’s musicality. I actually prefer the WA3 to its bigger OTL sibling, WA2.
This sounds ‘hedgey’ but with WA3, power tube and driver tubes make differences. The depth & extension of Chatham 5998 are obvious compared to those of, say, Thomson-CSF 6080WC. The same can be said of RFT ECC81 ‘foil getter’ versus Amperex PQ 6922. EDIT: if WA3 used tube rectification, the choice of that tube would be critical to sound quality.i'm not sure the exact vintage of the tubes, this is what the seller put in the ad:
Includes a Raytheon 6080 and National Brand 6922 tubes.
They don't look like new production tubes, but beyond that i'm a novice at reading NOS tubes. they're in the amp and warmed up for the day but i'll snap some pics at lunch when i let the unit cool down.
i'll have to look into those adapters, i have a bunch of 12A_7 tube from previous amps. from your experience would i get more noticeable changes swapping driver or power tubes? with my Stratus and Kenzie I definitely notice more meaningful changes on the power tube side, but with the pendant it was all about the input tube.
It took me years to get the right NOS tubes to make the WA3 come alive. And then it did come alive, quite noticeably, compared to all other tube sets used:i'm not sure the exact vintage of the tubes, this is what the seller put in the ad:
Includes a Raytheon 6080 and National Brand 6922 tubes.
They don't look like new production tubes, but beyond that i'm a novice at reading NOS tubes. they're in the amp and warmed up for the day but i'll snap some pics at lunch when i let the unit cool down.
i'll have to look into those adapters, i have a bunch of 12A_7 tube from previous amps. from your experience would i get more noticeable changes swapping driver or power tubes? with my Stratus and Kenzie I definitely notice more meaningful changes on the power tube side, but with the pendant it was all about the input tube.
They are definitely hard to find. That’s pretty much all I run in mine these days. Sounds similar to a 5998 or 421A.On a side note, has anyone here tried (or ever seen?) a 7802? It seems similar to the 6080 family but the amplification factor is 9 and the transconductance is 20,000. I'm not sure it would be compatible, I think I read about it in a Bottlehead Crack thread. I'll attach a data sheet. They seem very rare.
Depends on the version, some has a range on them such as the WA3+. Which one only will know by looking inside as it’s labeled on the choke. Typically 30-600 ohms according to the manual.What is the output impedance of this amp?