Just asking out of curiosity, since the amplifier you built is UL, can it be switched to triode SE like some other builds out the or is there something special to the topology?
As is, it is already a beautiful amplifier. Nice work.
Sad to say, I have no idea!
I am just joining the dots, I have no idea how the thing works.
I have written to the designer asking if I can post the schematic on forums but he hasn't replied yet... The magazine article describing the amp is all in Japanese and though I live in Japan... I can't read Japanese.
The power transformer is made by Noguchi Transformers in Japan
PMC-150M [PMC-150M] - 9,000? : Zen Cart [????] : The Art of E-commerce
Google translate will work for most of the text (kind of).
Hi, This is my first DIY tube amp after several SS and chipamps. It is based on Ari Polisois simplex (tnx for it!).Yet it is just a mock-up but I will soon start enclosure construction. Still looking for some nice meters or edgewise type meters for panel mount.
Sounds really good. bias - 200mA or 2V across 10R in psu. Output transformer from INDEL as well as Power tranny. Hammond 1H choke in 6c33c PSU (220V). Driver stage - 420V.
Tubes - 6n6p an 6s33c in SE.
Sounds really good. bias - 200mA or 2V across 10R in psu. Output transformer from INDEL as well as Power tranny. Hammond 1H choke in 6c33c PSU (220V). Driver stage - 420V.
Tubes - 6n6p an 6s33c in SE.
Attachments
Mijn pre amp bit updated now with tube regulation and tube rectification.(you see silicon rectification here)
Schematic is Kondo with a twist so mix of m1000 (electronic crossover 70 Hz)
and Jadis schematic (tube regulation).
Some facts
Weight total pre ( 3 cabinets/ components) approx 200 kg boat anchor
Massive copper encasement 12 mm
Floating platforms for 6072 tubes
Duelund silverwire and caps
Audionote, Naked Foils, and Mills/Riedon resistors etc
Yamamoto teflon tube sockets and bridges
Ebony and Cocobolo finish
Tubes: 6072, U52(bloody expensive), OA2, EL84, EF86
Schematic is Kondo with a twist so mix of m1000 (electronic crossover 70 Hz)
and Jadis schematic (tube regulation).
Some facts
Weight total pre ( 3 cabinets/ components) approx 200 kg boat anchor
Massive copper encasement 12 mm
Floating platforms for 6072 tubes
Duelund silverwire and caps
Audionote, Naked Foils, and Mills/Riedon resistors etc
Yamamoto teflon tube sockets and bridges
Ebony and Cocobolo finish
Tubes: 6072, U52(bloody expensive), OA2, EL84, EF86
An externally hosted image should be here but it was not working when we last tested it.
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Erik, as you did?. you destroy our dreams, we try to build with old microwave, we can not now dreaming, I see now my system that I thought the most beautiful, I will spread it on the garbage tonight. Do you think that this topic is ready for viewing pornography? At least publishes the electronic diagram and probably something we can criticize you.
No I make it and change it to my liking and growing with my gear...
I made the rack from ebony and some alu filled with sand and lead shot.
Spikes are 15 cm alu and adjustable.
Rack weight approx 80 kilo but then again it has to withstand a static 60-70 kilo pre amp (other two pre boxes in next room thru the wall 50 cm further away)
An externally hosted image should be here but it was not working when we last tested it.
I do not want to be off topic so here
http://www.htforum.nl/yabbse/index.php?topic=29264.0
BTW...it is amazing or to put it different it stays incomprehensible how a rack can alter your sound/music.
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Hi,
You can easily pick up a schematic of the internet showing the Kondo M.
the twist we ( me and my audiobuddy) made is two seperate pre amp in one (high/mid and low)...hence six tubes....and a tube regulation/rectification schematic of a Jadis Reference Pre.
My personal vision is there are two ways of buiding a good (pre) amp.
One is as simple as possible ..........and the other as complicated as possible ( both ofcourse well designed in the first place)
The catch with the simple design is that to make it sound special you have to use the most expensive diy stuff in the business in order to end up with those few parts in the musical ranking of the great late Kondo. ( let alone better that).
The complicated designs rely far more on very clever solutions and compromisis.
then on exotic materials.
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From now on the capacity of my lab power supply is not the weakest link any more.
I just managed to purchase a Soviet made (actually Estonian) UIP-1 power supply from the year 1967.
The specification is quite impressive: Output voltage 20 - 600 V, current 600 mA and weight 45 kg. Pass tube assembly consist of 8 pcs. of GU50.
No electrolytic capacitors used, all big sized PIOs. Schematic is at the link below.
http://www.jogis-roehrenbude.de/Roehren-Geschichtliches/Roehren-Netzteile/uip-1.pdf
I just managed to purchase a Soviet made (actually Estonian) UIP-1 power supply from the year 1967.
The specification is quite impressive: Output voltage 20 - 600 V, current 600 mA and weight 45 kg. Pass tube assembly consist of 8 pcs. of GU50.
No electrolytic capacitors used, all big sized PIOs. Schematic is at the link below.
http://www.jogis-roehrenbude.de/Roehren-Geschichtliches/Roehren-Netzteile/uip-1.pdf
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
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I decided to pimp Abstinence (6EM7 SE):
1 - Remove 22uf electros as first cap in PS and replace with 4uf\400V Russian PIO and snub with 0.1uf\630V poly
2 - Place to 100ohm\5W resistors between power tranni and rec. tube plates (control surge)
3 - Reduce last filtering\limiting R in PS to compensate for 100ohms on plates
4 - Replace orange drops with Russian Teflon 0.033uf\400V inter-stage caps
5 - Snub 100uf NP bypass caps (Ck) with 0.1uf polies.
6 - Replace the $24 5Y3 rec. tube with the $200 Sophia Electric mesh plate.
7 - Added sound deadening (bitumised Al) to bottom plate
Take a look at the mesh plate Sophia Electric 274B a huge tube and lights up like a Christmas Tree.
1 - Remove 22uf electros as first cap in PS and replace with 4uf\400V Russian PIO and snub with 0.1uf\630V poly
2 - Place to 100ohm\5W resistors between power tranni and rec. tube plates (control surge)
3 - Reduce last filtering\limiting R in PS to compensate for 100ohms on plates
4 - Replace orange drops with Russian Teflon 0.033uf\400V inter-stage caps
5 - Snub 100uf NP bypass caps (Ck) with 0.1uf polies.
6 - Replace the $24 5Y3 rec. tube with the $200 Sophia Electric mesh plate.
7 - Added sound deadening (bitumised Al) to bottom plate
Take a look at the mesh plate Sophia Electric 274B a huge tube and lights up like a Christmas Tree.
Attachments
I making some jokes
Actually I tried to said something, the proper judge is say your work is amazing. And I have to say nothing about, The excuse for the electric diagram is another joke also.
Respect to the Audio note preamp. Are this six preamps six different units with crossover for triamp? Is possible to give us a link to the schema?
Best Regards. If i go to Rotterdam please reserve one appointment to watch personally your realizations. I was following your recent CD player and is in the same type of massive construction: Cocobolo, Cooper and ebony
Actually I tried to said something, the proper judge is say your work is amazing. And I have to say nothing about, The excuse for the electric diagram is another joke also.
Respect to the Audio note preamp. Are this six preamps six different units with crossover for triamp? Is possible to give us a link to the schema?
Best Regards. If i go to Rotterdam please reserve one appointment to watch personally your realizations. I was following your recent CD player and is in the same type of massive construction: Cocobolo, Cooper and ebony
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Well the whole point is how do you quantify/justify an increase in sound quality.
To me it is well worth the money ....and the "tweaking" still is....so I guess that pretty much sums it up.
The remark I want to make is that sad enough you need the exotic (expensive) parts in a pretty straightforward tube set-up to reach "Nirvana" to me that is beyond discussion.
The proof is in the forum where a lot of enthousiastic guys want to clone Kondo Amps but cannot reach its level despite the schematics flying around.
My Pre has TWO amps in it (crossover-idea) HIGH (mids) and LOW...A BIT the same as M1000 set-up
