Modwright OPPO 105 tube rolling

T

TommyC

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Just ordered a Modwright OPPO 105D. Now it's time to research some good tubes.

I read various threads here, on Audiocircle, Whatsbestforum, etc regarding tube rolling on Modwright OPPO. Would be nice to have a dedicated thread here on AS as well.

Thoughts on NOS vs new production tubes? I'm a tube noob.

6SN7: Sophia Electric, Psvane T2, NOS

Rectifier: Sophia Electric, Psvane WE Replica, Emission labs, NOS

Voltage regulator tubes: I found some cheap ones on the web. Any NOS that's good?
 
I'd be surprised if you get anyone commenting who hasn't already posted at those other forums. One thing you need to decide is if you want to stick with the stock tube types (6SN7 and GZ34/5AR4) or try some others (some may require adaptors).
 
Robert, I would love to give Tommy a direct link, but I think he has already read it. And besides, more new feedback (today) is more time passed behind, and more experience acquired, so not a bad idea at all to invite Jim Marin here.
I'm sure Tommy can benefit?

Anyway, Tom is looking for feedback from real owners right here @ AudioShark. ...And there are couple.
 
Thanks Bob.

I'm only interested in stock tube types w/o adaptors.

I believe the 274B tube can be a direct sub for GZ34/5AR4?
 
Congrats Tommy.
I would avoid Psvane.
Very bad experience with them.

BTW, a Shindo system without a TT is like a Ferrari with winter tires...


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Jerome, yes, I read your ordeal regarding Psvane orders. They seem to produce nice sounding tubes, but it's often hit or miss.

I considered TT and its associated accessories many times, but decided not to dip my toe into the TT pond. With the right tubes, I believe I will be very happy with a digital source.
 
Tommy,
Of course you will be very happy with Shindo and a good digital source. But you're just missing the best part of Shindo. The way to handle perfectly a full analog signal.
One day you'll come to it.
No doubt.


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I remain quite happy with NOS TungSol oval-plate blackglass 6SN7 and NOS 1958 Dutch Mullard GZ34. I'm not sure there is much to choose between (sonically) for the regulator tubes, but they all run only $5-10 each so experimentation is fairly inexpensive.
 
TommyC said:
Just ordered a Modwright OPPO 105D. Now it's time to research some good tubes.

I read various threads here, on Audiocircle, Whatsbestforum, etc regarding tube rolling on Modwright OPPO. Would be nice to have a dedicated thread here on AS as well.

Thoughts on NOS vs new production tubes? I'm a tube noob.

6SN7: Sophia Electric, Psvane T2, NOS

Rectifier: Sophia Electric, Psvane WE Replica, Emission labs, NOS

Voltage regulator tubes: I found some cheap ones on the web. Any NOS that's good?
Click to expand...

Congratulations! I look forward to hearing your impressions once you receive it!

I'm using the Sophia Electric 6SN7s along with a Gold Lion GZ34 in mine. Some have stated that this combination is too detailed/sharp, but I haven't found that to be the case in my system. I'm also using a ModWright LS100 with the Sophias and a NOS Mullard there. I've used various combinations of the Sophias and Mullards in both units, as well as the GLs in both, and have found that I like the combination I'm using now the best.
 
just for the record guys i have been talking with nikolay @ tube maze and he carries tj full music 6sn7's, which are what sophia buys from them and are branded with the sophia name. they are the same tubes and nikolay sells them for alot less $$. im getting a quad of matched for my amps shortly. just an fyi because if i knew this before id already have them.
 
Which online suppliers have high quality rare NOS tubes? Brent Jessee? Tube Maze?

From what I'm reading, the NOS tubes are more reliable compared to current production Chinese tubes.
 
Tommy...does Dan Modwright have any suggestions for tube rolling?
 
The last time I asked Dan about this he was still recommending the Sophia / Gold Lion combination mentioned earlier. He said he didn't feel comfortable (or something, I can't remeber if those were his exact words) making NOS recommendations.

Brent Jessee, Tube World, TC Tubes are all good sources (I'm sure there are more).
 
Dan doesn't think the 274b is a good idea. It needs very specific power supply.

Im going to email tube world and Brent jessee for some recommendation.
 
Fortunately the good tube vendors all have generous return policies. One big potential problem with NOS tubes in the Oppo is microphonics. Since the Oppo has moving parts (assuming you are playing a disc), a microphonic tube may respond to the vibrations generated by the rotating disc. If you didn't see this yet it might be helpful

6SN7 VT

and Brent Jessee's website gives good descriptions about individual tube types as well.
 
Thanks for the info. What makes nos tubes microphonic? New stock tubes don't have this problem?
 
TommyC said:
Thanks for the info. What makes nos tubes microphonic? New stock tubes don't have this problem?
Click to expand...
Any tubes can have this problem. From what I have read, which is also my experience, for the 6SN7 NOS tubes are more likely to be microphonic than newly manufactured tubes. I don't know for sure why, someone like Myles might. Some varieties (of 6SN7) are more prone than others.
 
I can't think of a single reason why a NOS tube would be more prone to being microphonic than a current production tube.
 
mep said:
I can't think of a single reason why a NOS tube would be more prone to being micro phonic than a current production tube.
Click to expand...
Nevertheless, the major tube vendors do make a point of this for (at least) the 6SN7.
 
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