Tube Amp Archive

The Problem seems to be solved - in the end it was me messing up. The Master at 9 o‘clock seems to be a quite hard border - depending on how high input gain is set and if PAB is on with a clean treble booster before the input. Staying well under that works - I thought turning down the KU first pot w...

Sorry for the break, @erwin - I fiddled around a bit more last week and the distortion in the KU already happens with Master set at 9oclock… the amplification in the KU is then less what it takes to drive the PA, seems. Amp is way louder without KU. Does the split point of the loop have to be after ...

Interesting - you have any before / after sound files? Can you describe what the mods do? Did you also disconnect the LFB at V1b? Thanks!
Cheers, Frank

My bad - this came over irritating, I guess: I did not properly mention that whatever value the Master is, I can't have the gain all back with only using "Recovery" Stage on the KU... the amplification at that stage is not enough even when setting the KU "Send" only slightly before max level, "Retur...

@erwin_ve: Spent some time yesterday fiddling around, still: The sound starts to compress / distort badly when I turn the master volume up past 11:30 (what would be the input gain to the KU and the loudness range I want to perform with) no matter what I dial in with the send (even close to nothing),...

Thanks, Erwin; it did help - the Master comes before the loop output, I kind of forgot that. I turned that up and probably drove the KU into distortion. *sigh* I'll try again and report later - I'll have a look into the treble loss as well. What is kind of inconvenient: The functional Master Volume ...

Hi everyone; I have a Kleinulator in the loop of a VHT D-Fifty for some time now, dialled in correctly (by the book of Klein) and working. Until I had the amp in a situation where I had to turn up the master volume beyond 11:00. The Kleinulator started misbehaving, starting with signal compression g...

Fourth and last one: Still ODS #44 on the left. That was quite a party - forgive the players for not being overly accurate.
BTW, the song title means "Got tobacco?" in the german home town of the former Dumble and Boogie import company "Applied Acoustics".

Again: Third of four. ODS #44 on the left, wah again.

Next one: Same concert, ODS #44 on the left, pulled up a bit (pity there's a drunken wah too soon and long).

Hi there, this is one of 4 live recordings from my archives that I stumbled over the last days - should be from around 2008, the amp is #44 played by the original owner who bought it new around '79. This was a reunion bar concert of his band Zero Zoom, a fusion band from the late 70s/early 80s. In t...

Hi Everyone, a friend just sent me these pics. Dumble 044, with the typical - Applied Acoustics - cabinet. I've been told it sold for 22.000,-EURO's... aroound $29.000,- Enjoy Hi everybody, been lurking here for a while - stumbled across this old posting today concerning the exact amp that still fi...