63.247.31.12
In Reply to: RE: Siemens E83CC and other Siemens 12AX7 varieties posted by posbwp55@msn.com on October 18, 2009 at 21:34:18
A long while back I placed some Munich-made Siemens/Halske ECC83 into an original Vox AC30 guitar amp. This amp came with Mullard ECC83 as stock. Mullards gave the amp a warm midrange, good bass, nice rounded off top end. Typical early Beatles/Stones "British-Blues" tone. The amp had Blackburn made Mullard EL84's. Running Class "A" cathode-biased. Vox-labeled "Bulldog" speakers.
The Siemens really opened up the amp's top end and tightened the bass. A cleaner, brighter, even more powerful tone. More shimmering reverb tinge to the high notes. Very nice tubes. Kinda made the amp shift a little towards an early Ampeg combo tone (early REM or Byrds tone).
The Munich Siemens and Berlin/Ulm Valvos are very nice tubes. But, good NOS must cost a fortune now (the S&H were expensive ten years ago). If you can find some they lend a very clean high to an amp. Good bass. Yet, maintains a nice midrange. Not as warm as a typical RCA BP or Mullard. Which maybe good or bad, depending on your tastes.
The only E83CC I've used were Philips/Miniwatts. I believe they were Heerlen Holland made. They lend a nice clear tone, a mellow midrange. Not as strong bass as the S&H. More rolled off high end, too. Very good tube.
Really, they are all good tubes. Lend their slight unique signature to the unit. Last a long time and take physical as well as electrical abuse.
Follow Ups:
Post a Followup:
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2009, Audio Asylum, all rights reserved ]
[ Go Green ]
[ Take5 ]