Tubes Asylum

Try mixing the signal tubes (Mullard with EH/both combos)...

198.81.26.7

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DeKay

(A)

In Reply to: Jolida 302b tube rolling posted by twisty on August 28, 2004 at 14:56:53:

If the SED's are like the Svetlana el34's being sold 3-4 years ago, then I've heard them in a 302 (liked them).

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Tried it. - twisty 18:17:02 08/28/04 (3)
So far both combinations seem to be 'the worst of both worlds'.
EH 12at7's (driver) with Mullard 12ax7's (preamp) added brightness without improving detail or speed. The other way around weakened the midrange with only a small increase in detail. This was after only a brief tryout, with a room fan on hi to beat the heat. I'll retry tonight.
- Describe the Mullards you are using. If they are the mid 80's... - DeKay 23:23:03 08/28/04 (2)
  military dreck that hit the market a few years ago (some dealers are still stuck with/selling them) they are not @ all like the older versions, which are also hit and miss
  Also, never used a Mullard manufactured ecc81 (any vintage/version) that sounded half way decent in my gear.
  Best to ID what you are using, before moving on, IMO.
  - Re: Describe the Mullards you are using. If they are the mid 80's... - twisty 23:51:56 08/28/04 (1)
    They're from Brent Jesse Recordings. I don't know much about the different Mullard's available, so I'll paste the description from Brent's site:
    New Old Stock in whiteboxes. Late 1960s vintage, made in Great Britain, some unlabeled; some for Bogen, Knight, Fisher, IEC Mullard, Amperex, Hammond Organ, Haltron, Tronal, GE and RCA. All are genuine Blackburn, UK Mullard factory made. These have that sweet Mullard sound at a lower price!
    The boxes are labeled '1969' and the price was about $100 per pair.
    - Those are probably nice 12ax7's (I use similar/like ones... - DeKay 09:29:49 08/29/04 (0)
      for softer HF's). Thing is I'm not familiar with the EH's (or any other current production 12ax7's). Perhaps someone else will chime in on this?
      When I want a cleaner sound I use Amperex 12ax7's in one of my vintage integrated amps.
      There is one Mullard ecc81 I like as drivers in my 2A3 amps (forgot about them). They have Philips Mini Watt lablels with "B" codes (probably 70's production) and the sound is clean, but still full. I also use RCA black plate 6201's (similar to ecc81), but they may be too dark for your taste/setup. The 6201's are inexpensive.
      Maybe try searching "302" to see what combos people have liked in the Jolida?
      There is also a Jolida dealer who performs modifications (forget his moniker and he posts here) who may have some suggestions.
      It's been so long I can't remember the results of the various signal tubes I tried in a 302. Just recall that next to Mullard xf1's/xf2's I also liked the early Svetlana el34's.
      Even if they look clean you might also try polishing the pins on the tubes you currently have. Just did this to the tubes in a Pilot 232 and doing so definately cleaned up the sound.
SED=Svetlana Electron Devices. Same tubes. nt - twisty 18:01:06 08/28/04 (0)
nt

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