Other ADA Gear > Speakers & Cabs
Ampulator
rnolan:
I've started this here as the Ampulator probably deserves it's own place and also maybe some kind member may post the manual and schematic.
From: Quote from: lylerasputin on February 23, 2014, 10:18:34 AM Thanks so much for the advice gentleman, I sincerely appreciate it.
What tube would you recommend swapping it out for? I have opened the box yet (in a rack), so i forget the OG tube installed… I cover a variety of tones in my work, from heavier to clean etc… so need advice on a decent jack of all trades tube, and perhaps some warnings about ones that ARE NOT good! ..
All that said, I am not an electrical engineer or anything, but am pretty good at user servicing my stuff, is opening the box a pain? and is there anything to be aware of in that process…? Just want to know if it is worth it before going through the hassle of pulling out of a large rack….
thanks again for your advice!
I'm not sure what tube the Ampulator uses but my guess is it's a 12AX7 running in twin triode (one triode per channel) and it's used to bring some warmth (tube happiness) to the signal (similar to my TLAudio Ivory 5001 quad valve preamp). So you don't need super high gain but low noise and well balanced (musical, warm, 3D, tight etc). So, for example, a super high gain JJ is not necessarily the best for the job. I wouldn't normally recommend an EH tube, but the low gain version of this would probably be a good fit (http://www.dougstubes.com/preamp-tubes/12ax7-ecc83-7025/electro-harmonix-12ax7.html). A really good 3D tube is the New Sensor Mullard (http://www.dougstubes.com/preamp-tubes/12ax7-ecc83-7025/mullard-12ax7.html), but tube choice is a very subjective area.
Hope this helps, cheers Richard
MarshallJMP:
Yes it uses a 12ax7 but it's used as a push-pull amp with it's own output transformer.
lylerasputin:
Richard, thank you so much for your assistance in this, will check out the Dougs Tube Mullard reissue!
rnolan:
--- Quote from: MarshallJMP on March 04, 2014, 12:52:49 PM ---Yes it uses a 12ax7 but it's used as a push-pull amp with it's own output transformer.
--- End quote ---
Interesting, thanks MJMP.
--- Quote from: lylerasputin on March 04, 2014, 02:51:19 PM ---Richard, thank you so much for your assistance in this, will check out the Dougs Tube Mullard reissue!
--- End quote ---
No worries, happy to help :)
lylerasputin:
--- Quote from: MarshallJMP on March 04, 2014, 12:52:49 PM ---Yes it uses a 12ax7 but it's used as a push-pull amp with it's own output transformer.
--- End quote ---
Sorry for my lack of knowledge on this, what exactly does this mean? And does this change how I should approach swapping out the tube? Thanks!
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