Rolling 6sn7 tubes in Modwright Oppo 105...

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rbbert

Re: Rolling 6sn7 tubes in Modwright Oppo 105...
« Reply #40 on: 18 Feb 2014, 11:45 pm »
I'm trying out some 1940's RCA VT-231 greyglass (since I haven't found a good pair of TungSol ovals yet).


rbbert

Re: Rolling 6sn7 tubes in Modwright Oppo 105...
« Reply #42 on: 19 Feb 2014, 02:38 am »
Thanks David!  The two more expensive pairs are from France; the test results on the least expensive pair actually look pretty good, but based partly on my experience with a similar slightly mismatched pair (where in my Oppo one tube had noticeably more output than the other) I've been a little skeptical of this pair.

DaveC113

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Re: Rolling 6sn7 tubes in Modwright Oppo 105...
« Reply #43 on: 19 Feb 2014, 02:50 am »
Wow, russian military 1578 type tubes usually go for about $200/pair... they are considered the best of the best, has anyone compared them to high $$$ tung sols?

I have a pair of tubes that are the same as the 1578s but they have no holes in the plates... they are very very good tubes and the "real" 1578s with holes and black plates are supposed to be even better.

If you do try the russian tubes the only ones worth spending money on are the ones that are marked 1578, have metal bases and black plates with holes. They usually go for about $200/pair IF you can find them. There are a bunch of "close but not quite" tubes on ebay for too much money. I got mine for $50/pair but some are trying to sell these for the same price as real 1578s.

rbbert

Re: Rolling 6sn7 tubes in Modwright Oppo 105...
« Reply #44 on: 19 Feb 2014, 03:25 am »
There are quite a few rankings of the 6SN7 type tubes around; I don't recall seeing those Russian tubes ever mentioned?  Are you sure it's a 6SN7 equivalent?

edit: Perhaps these are also designated 6H8C?  I haven't seen any NOS for sale in the last few months

DaveC113

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Re: Rolling 6sn7 tubes in Modwright Oppo 105...
« Reply #45 on: 19 Feb 2014, 05:13 am »
Yes, they are definitely 6SN7s, there are usually some on ebay although the seller russhamma seems to be offline... he had the right ones. Some others probably do to, idk.

The ones I have are metal base black plate, but they lack the holes in the plates. They sound excellent. I have some really nice 6SN7s and 5692s and the Russians are up there. I do not have any crazy high $ tubes though.

rbbert

Re: Rolling 6sn7 tubes in Modwright Oppo 105...
« Reply #46 on: 7 Mar 2014, 12:57 am »
It's both gratifying and depressing how much more satisfying the oval-plate TungSol's are than any of the other tubes I've tried.  Better bass, better highs, better imaging, smoother response, low-noise.  The depressing part is the cost and limited availability.  Why can't a company like Kronzilla copy these?

dminches

Re: Rolling 6sn7 tubes in Modwright Oppo 105...
« Reply #47 on: 7 Mar 2014, 04:27 am »
RB, not surprising impressions.

Tommy123

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Re: Rolling 6sn7 tubes in Modwright Oppo 105...
« Reply #48 on: 3 Sep 2014, 01:34 am »
Seems like the Tung Sol black glass oval plate 6SN7GT is the holy grail. If I can get my hands on 2 matched pair, should I go for it? It'll probably be hard to find these jewels again.

Wig

Re: Rolling 6sn7 tubes in Modwright Oppo 105...
« Reply #49 on: 18 Sep 2014, 03:07 am »
How does the Tung Sol Oval stack up with the RCA Redbase 5692?

Wig

dminches

Re: Rolling 6sn7 tubes in Modwright Oppo 105...
« Reply #50 on: 18 Sep 2014, 11:42 am »
I don't find them comparable. The TS are music more musical - much sweeter sound.

Wig

Re: Rolling 6sn7 tubes in Modwright Oppo 105...
« Reply #51 on: 18 Sep 2014, 11:52 pm »
dminches,

Thanks, I'll have to keep my eyes open for a pair some time in the near future especially if the price is right!

Wig :thumb:

Wig

Re: Rolling 6sn7 tubes in Modwright Oppo 105...
« Reply #52 on: 4 Oct 2014, 05:30 pm »
dminches,

How close does the Sylvania VT 231 or W compare to the Tungsol?

Thanks,
Wig :D

dminches

Re: Rolling 6sn7 tubes in Modwright Oppo 105...
« Reply #53 on: 4 Oct 2014, 06:40 pm »
I am not a fan of the Sylvania VT231s. I find them thin sounding a lacking base. I do like the 6SN7W tall body and the Sylvania WGTs. I prefer the TS but the margin isn't huge. The WGTs are the best value. The 6SN7Ws can get pretty expensive too.

golfugh

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Re: Rolling 6sn7 tubes in Modwright Oppo 105...
« Reply #54 on: 2 Jul 2015, 09:57 pm »
Just thought I'd throw out a nice combination 1950s RCA 6SN7 GTB with a 1950s GE 5AR4 rectifier...awesome  sound hint of warmth.

Not expensive!

Mark

RPM123

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Re: Rolling 6sn7 tubes in Modwright Oppo 105...
« Reply #55 on: 2 Jul 2015, 11:48 pm »
Now if you really wanted to kick up the performance a few notches...try a set of these - on ebay! Plus free shipping.  :wink:

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Mossback

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Re: Rolling 6sn7 tubes in Modwright Oppo 105...
« Reply #56 on: 18 Oct 2015, 11:26 pm »
I'm way overdue adding to this topic.

First of all the Modwright sounds wonderful with whatever tubes used. I am very pleased with the Oppo 105

I've only used a fat bottle Mullard GZ34 per Dan's suggestion. I have found this rectifier the gold standard in most gear that uses that type. I plan to buy a  couple reissue GL someday and may give one a try.

For 6SN7 I tested Sylvania metal base, Tung-sol black glass oval plate, a matched set of WWII RCA's black plate and a pair of Psvane Treasure CV181-Z.
Long story short the Psvane Z is the one I kept. I think the Tung-sol was awsome but I had one die on me. The metal base Sylvania is amazing too. My Psvane CV141Z is an older pair nearly two years old they have a T MK II version out now that is supposed to have slightly extended highs as opposed to the Z with a more vintage laid back sound this according to Psvane. I'm not sure how much marketing or fact is involved in their business. I do know they sound great. I hope this doesn't sound like a commercial for Grant but I've got several tube types from them and been very pleased. 
« Last Edit: 19 Oct 2015, 03:30 pm by Mossback »

jhrlrd

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Re: Rolling 6sn7 tubes in Modwright Oppo 105...
« Reply #57 on: 6 Feb 2016, 07:04 am »
I found the Sophia 6sn7 to be super microphonic, so much so I could hear the drawer through the speakers. Herbies dampers solved this.
For rectifier, could the GZ32 be used?

Longandstraight

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Re: Rolling 6sn7 tubes in Modwright Oppo 105...
« Reply #58 on: 7 Feb 2016, 04:03 pm »
Send 50 bucks to Modwright for the cover with the top hole cut out. Install the Phillips rectifier( sorry out of town for the model number). Big improvement over the Mullard. I think the tube is 50 bucks.  Much better low end and overall sound

rbbert

Re: Rolling 6sn7 tubes in Modwright Oppo 105...
« Reply #59 on: 7 Feb 2016, 07:35 pm »
It's $100 now, and not necessarily better than a good '50's/60's Mullard, depending on your signal tubes. It may be a good match for Sophias, whose sound is often characterized as a little "thin".