Tube nomenclature

butchbass · 1305

« previous next »
Pages: 1   Go Down

0 Members and 1 Guest are viewing this topic.

Offline butchbass

  • Full Member
  • ***
    • Posts: 102
on: October 11, 2013, 05:40:55 AM
What would the difference in a 12AT7 and a 12AT7WA be? 

Butch Gross
Stereomour II/  Blumenstein Orcas, Dungenes/Schiit Bifrost Multibit/Amarra

Offline Paul Birkeland

  • Global Moderator
  • Hero Member
  • *****
    • Posts: 19757
Reply #1 on: October 11, 2013, 05:48:45 AM
The "W" traditionally indicates some additional testing in accordance with military specifications.

The "A" indicates a controlled heater warmup characteristic.

Neither of these are appreciable differences. 

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Grainger49

  • Hero Member
  • *****
    • Posts: 7175
Reply #2 on: October 11, 2013, 09:50:04 AM
They are drop in replacements, the "WA" is possibly better sounding for Paul's reasons.


Offline butchbass

  • Full Member
  • ***
    • Posts: 102
Reply #3 on: October 11, 2013, 03:53:27 PM
Thanks for the info. Music enjoyment is the best part of this hobby but the eduction also brings fulfillment.

Butch Gross
Stereomour II/  Blumenstein Orcas, Dungenes/Schiit Bifrost Multibit/Amarra

Pages: 1   Go Up
« previous next »