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Question on the MiniT OC2 Regulator Tube> (Read 4788 times)
ddemy
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Question on the MiniT OC2 Regulator Tube>
02/09/10 at 03:51:10
 
Hello Steve, have a question on the OC2 regulator tube. I just received my MiniTorii (S/N# 026) last week and after set up & power up I observed that the left OC2 tube is almost twice as bright as the right OC2 tube. Wanted to know if this is normal(?) can the intensity be that different between the two(?), or,  is it an indication that the dim tube maybe is weak or possibly defective. I do not have access to a tube tester so I am at a loss to explain the difference. The left (bright) tube is labeled Raytheon 10499 (orange label) and the right (dim) tube has no clear brand markings but barley readable is labeled with 10499 (yellow color) .  If I flip-flop the tubes to opposite side of the amp the orange label Raytheon is always the brighter of the two regulator tubes. This observation is very consistent over the past 5 days.
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« Last Edit: 02/09/10 at 03:56:12 by ddemy »  

Decware MiniTorii, s/n: 026 / Audio Nirvana 15" full range cast drivers, Wyatt-woodworking 5.6 cabinets / NAD525BEEE CDP / Fisher 100 B FM Tuner / MAC & Decware / BottleHead Crack OTL , Beyer DT880(600ohm) & DT770 (250 ohm) headpho....keeping it simple = Priceles
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juanitox
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Re: Question on the MiniT OC2 Regulator Tube>
Reply #1 - 02/09/10 at 15:48:25
 
same effect with my mini torii regulator, but when i mesure the Output voltage it was the same voltage that s the only important thing Wink
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Steve Deckert
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If the 1st watt
sucks why continue?

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Re: Question on the MiniT OC2 Regulator Tube>
Reply #2 - 02/09/10 at 17:38:34
 
Yes,  the OC2's in particular almost never match in brightness.  This is normal, and I understand visually distracting.  If you purchase a few extra OC2's you'll be likely to find a pair that are pretty close.  The brightness of the tube has ZERO to do with it's operation in this case.  It is simply differences in how the tube was made.
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ddemy
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Re: Question on the MiniT OC2 Regulator Tube>
Reply #3 - 02/09/10 at 20:31:50
 
Thanks Steve !... for your response and also to Juanitox for your personal observations on the OC2 tube.  This was exactly the answer I was hoping to hear, (or should I say expecting to hear), since sonically this amp is pretty much astounding, (my first impressions with less than 50 hours burn-in on the tubes). Also, Steve thanks for the link to the MiniTorii Operators Manual may have already sent you an email on that topic which you can probably ignore.   I’ve been smiling ever since I flipped the power toggles to the "ON" position………ddemy
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Decware MiniTorii, s/n: 026 / Audio Nirvana 15" full range cast drivers, Wyatt-woodworking 5.6 cabinets / NAD525BEEE CDP / Fisher 100 B FM Tuner / MAC & Decware / BottleHead Crack OTL , Beyer DT880(600ohm) & DT770 (250 ohm) headpho....keeping it simple = Priceles
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Rivieraranch
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Re: Question on the MiniT OC2 Regulator Tube>
Reply #4 - 08/24/10 at 02:07:30
 
A guy on ebay is selling 1982 JAN Raytheon OC2 that are a beautiful bright orange. I am running a pair right now. They are cheap as spit and work well.
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DECWARE CSP2+, TABOO MK III; SE84CKC; HR1; TRAPEZIUM DESKTOP SPEAKERS; TECHNICS SL1200MK5 turntable; Ah! Njoe Tjoeb CD player; MARANTZ 2226B, 2216B receivers; SENNHEISER HD-580 headphones
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Raduschka
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Posts: 210
Re: Question on the MiniT OC2 Regulator Tube>
Reply #5 - 04/28/11 at 03:15:06
 
I wonder where I could get a pair of nos high quality oc2 tubes... I am in Canada and my usual supplier does not carry them (the tubestore). I can't find any on Ebay either. Any suggestions? Would you have any for sale?
Thank you
Radu Christian Barca
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Pale Rider
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Re: Question on the MiniT OC2 Regulator Tube>
Reply #6 - 04/28/11 at 14:10:09
 
Depends on what you're looking for I guess. I found these on ebay:

http://cgi.ebay.com/0C2-Tube-New-Raytheon-Voltage-Regulator-Tubes-/120364806987#...

Seem similar to what RR was describing.
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Decware: Ultra | Torii MKIII [2] | SE84ZS | Taboo MkIII Sources: Synology 1812+ | Baetis Revolution | PWD DAC MKII | Lumin Network Player | Mytek 192 | Oppo 105 DSP: DEQX Mate | Emotiva Outputs: ERR [6] + Servo Subs | LCD-2 & other cans
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Raduschka
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Posts: 210
Re: Question on the MiniT OC2 Regulator Tube>
Reply #7 - 04/29/11 at 04:29:47
 
thanks
I am looking into that.
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tybee
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Re: Question on the MiniT OC2 Regulator Tube>
Reply #8 - 04/29/11 at 20:49:46
 
Regarding oc2 tubes, Raytheons are quite common and a very good tube.  I suggest you experiment with 6x4 rectifier tubes. I have found quite a change in sound MT with rolling this particular tube.  If you are looking for more bass response, try a Tung Sol wavvy getter.

By the way, I am running RCA OD3s in my MT.
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Rivieraranch
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Re: Question on the MiniT OC2 Regulator Tube>
Reply #9 - 04/30/11 at 16:17:24
 
I have bought Raytheons from that guy and they were fine. One died on me which I guess could happen. Order several pairs because eventually this guy will sell out.
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DECWARE CSP2+, TABOO MK III; SE84CKC; HR1; TRAPEZIUM DESKTOP SPEAKERS; TECHNICS SL1200MK5 turntable; Ah! Njoe Tjoeb CD player; MARANTZ 2226B, 2216B receivers; SENNHEISER HD-580 headphones
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Raduschka
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Posts: 210
Re: Question on the MiniT OC2 Regulator Tube>
Reply #10 - 05/01/11 at 04:06:05
 
I ordered a pair of 0c2 from Ebay, they are pretty cheap.

I also got myself a pair of black plate nos philips 6x4 and surprisingly the bottom end has gotten even tighter, and everything seems punchier, something the 0d3 regulator had already brought about to a certain degree. I have enough bass now, and everything is perfect. I have been comparing a pair of telefunken 12ax7 with Mullard 12at7 (both nos) and they sound pretty much the same. I had tried a pair of Cifte 12au7 and they were just too bright in my system. Monday I will receive 2 pairs of Duende Criatura tube rings, for the 12at7 and the 6v6 (jj 6v6 are larger than the usual 6v6) and I will keep you posted if yiu are interested!
Thanks
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bhfsim
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Re: Question on the MiniT OC2 Regulator Tube>
Reply #11 - 05/04/11 at 02:52:54
 
Been playing around with the oc2 regulator switch. It seems the soundstage opens up quite a bit (though not as focused), while it is off. Anyone else find this to be true?
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