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Post by floriangerard51 on Mar 5, 2012 2:40:53 GMT
Hi, I just finished my bravo V2 amp mods and as soon as i get the tutorial writed to publish here i'll start a new project. What do you know about a good tube amp design with more than 1 tube like the bravo V2 I wish to build some thing based on tube only and not an hybrid amp like the bravo featuring a mosfet + tube design.... Thanks for your help !
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xerxes
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Post by xerxes on Mar 5, 2012 5:22:49 GMT
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Post by floriangerard51 on Mar 5, 2012 11:07:43 GMT
Nothing more like building with a pcb bought via ebay? or something like that????as i could choose all the caps, resistors,....when you buy the pcb free of materials...
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xerxes
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Post by xerxes on Mar 5, 2012 14:57:06 GMT
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XTRProf
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Pssst ! Got any spare capacitors ?
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Post by XTRProf on Mar 6, 2012 4:42:43 GMT
There is no best. To me, the best is a high watter of AT LEAST 1 to 2 W like the Schiit Lyr or Hifiman EF5 to drive all HP to smithereen. Smithereen not in the sense of blowing the HPs up but making the HPs "sing" like a real pro.
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Post by floriangerard51 on Mar 6, 2012 20:18:41 GMT
Yes but I want to consider modding or build one tube amp....that's more fun! ;-)
Any other option to consider???
Is there any copy of the crack bottle head design? Or some thing with 300b, 6sn7...?
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XTRProf
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Post by XTRProf on Mar 7, 2012 8:26:26 GMT
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Post by floriangerard51 on Mar 7, 2012 9:29:32 GMT
Yes but it seems that's not an otl design?! Because of two transfos....no? I'd like to make an otl design to pair with my high impedance hd 650s....:-)
By the way I'm currently listening ADELE the live Albert royal hall rolling in the deep....that's just amazing how it sounds....! For the price ;-)))))
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xerxes
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Post by xerxes on Mar 7, 2012 18:14:41 GMT
There are several OTL designs here: gilmore2.chem.northwestern.edu/projects/index.htm#tubesTo be honest, I've never heard a tube amp and have long thought of buying/building one to see what all the fuss was about, but there are so many to choose from that I didn't know which one to go for. For now, I'm sticking with my op-amp based SS amp.
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XTRProf
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Post by XTRProf on Mar 8, 2012 1:59:15 GMT
Yes but it seems that's not an otl design?! Because of two transfos....no? I'd like to make an otl design to pair with my high impedance hd 650s....:-) Oh, be carefuil with OTL. It can destroy your precious HP when it decided to throw it's tantrum. Traffo coupled HPs are protected. For me traffo coupled HPs and speakers for tube amp anytime. Good luck to your OTL. By the way I'm currently listening ADELE the live Albert royal hall rolling in the deep....that's just amazing how it sounds....! For the price ;-))))) Dont' tell that to Mike or you will get a rotten egg coming.
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Post by pandapops on Mar 18, 2012 5:04:35 GMT
I wouldn't touch anything with high voltage unless you're very experienced, tubes were generally designed to be high voltage devices and the best tubes amps tend to run them like that.
Personally I wouldn't bother investing heavily in tubes at all - they're a money pit, there's always some better NOS tubes, caps or output transformers out there. In my experience the best sound you'll get as an affordable safe setup will be solid state, with discrete tranistors, multiple PSUs and whatever audiophile upgrades you want to add.
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Post by floriangerard51 on Mar 18, 2012 16:48:38 GMT
ok and there plenty of SS Designs over the web ! Do you know one design that can really get myself amaze about the sound?! it will drive my HD650 (High ohmics load) budget we'll be near 200€ max. excluded the power supply has i already have the parts of the PMILLET DC POWER SUPPLY Range 1.5v to 35V.
thanks for your advice.
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Post by pandapops on Mar 18, 2012 17:07:53 GMT
The Panda is great with HD600, and responds very well to conversion to dual mode PSU, I think it would be tough to beat for a middling budget.
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Post by floriangerard51 on Mar 18, 2012 17:11:00 GMT
ok is there any kit of this amp? the thread has quite lots of pages ;-) and is there any summary with the essentials mods to get the best of this design??
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Post by Deleted on Mar 18, 2012 18:30:56 GMT
It might be more 'DIY fun' to build the SC A-HA. The Panda is a kit, the SC A-HA is more a DIY project and probably more 'satisfying' to build than just soldering some supplied parts on a PCB.
Both of these amps do not have the added tube distortion though.
But of coaurse you already have an amp with that feature.
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Post by floriangerard51 on Mar 18, 2012 19:00:29 GMT
Hi Frans,
But do you think i should build a SS amp to see if that's good or not? Has i'm used to tube amps...?
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Post by Deleted on Mar 18, 2012 19:39:22 GMT
I am merely suggesting building a SS design as you already have a tube hybrid so you can have a choice of flavor. I don't see much point in owning several amps that all do something very similar.
When you really like tubes you could go for an all tube amp.
another SS option is the O2 amp from my evil-twin or his (yet to be released) ODA full opamp based in this case.
You can always build a tube buffer and put that in front of it and have the best of both worlds. Afterall the only big difference between SS and tube is the added harmonics.
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Post by floriangerard51 on Mar 18, 2012 20:00:40 GMT
ok your right! I can try building one SS amp and if i don't really like the signature i can use a tube buffer.... is there a thread on the "SC A-HA" This is the 15W SC amp
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Post by pandapops on Mar 18, 2012 21:24:00 GMT
As long as you can get PCBs for A-HA that should be a very good project, you might have to do the JLHs on veroboard.
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Post by Deleted on Mar 18, 2012 21:45:47 GMT
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Post by Deleted on Mar 18, 2012 21:56:47 GMT
Frans That's not quite true.It was based around a proven S.C. design with typical THD of around .0006%, and S/N of 113dB unweighted.That was without any device matching. or "special" PSUs.We boith try to get as good a technical performance as possible. In my case as it is a discrete amplifier I am able to "tweak" the original design further, whereas with an I.C. based design you are mainly limited by the opamp used and it's correct implementation. Both methods are capable of truly excellent results. Alex
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Post by Deleted on Mar 18, 2012 22:10:31 GMT
O.K. I'll omit the 'completely' part. Still remains funny to me. But you're right, both amps will sound equally great but both will lack the high amounts of 'pleasant' distortion those pesky tubes will bring to the mix.
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