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SDS, Supra, MPX tuberolling, the new global, improved thread - Page 31

post #451 of 780

Western Electric 396a

Phils

I'd recommend getting matched codes Western Electrics. Different codes and different years have different sounds. There are 3 pairs of same codes in my collection and each pair has sound that are not alike contrary to what you may have read. 3 number codes are all pre-1956. In 1956 codes went to 4 numbers. I believe Western Electrics started in 1946. So 226 would be 26th week of 1952 and 413 would be 1954. Hope this helps you. In my system Western Electrics sound a bit thin in the treble.. verging on shrill. Also a bit hooty. Best of the 3 pairs I have is 652. And I mate it on my EL84 amp with a Sylvania, the least favorite of my EL84's, which I find a bit dry but detailed. Sylvania EL84's are revealing for listening to the inner workings of piano music on my audio amp (not guitar) but ultimately not romantic but clinical. So I'm probably going to sell all my Western Electrics and the Sylvania blackplates. I have quite a few 5670's and 2c51's. Anyone interested in comparing Bendix 5670 to Bendix 2c51 (don't have them).

Bide
post #452 of 780
This is more a general question than anything... Do families of tubes (6922, 6SN7, etc.) have more or less the same sonic signature compared to a common manufacturer (i.e. Amperex 7308 and Amperex 7119)? Or is there really no correlation in either case...

Also, even more generic of a question is how does one determine if a tube will work in a given amp? For example, the European EF86/6267 size. I know I could search the archives, etc. but you guys who "discover" these new tubes to work, there must be a method to your madness, like looking a gain, voltage requirements, etc.. could someone walk me through the process for the 6267? Also, how does one usually choose a tube to be in the driver or gain position? Sorry for asking for major "hand-holding"

Also, there's something of a love affair between me in the Telefunken CCa (6922) tube, and do you think the 7-volt version (the 7DJ8) would possibly work in a MPX3 SE with some of the ECC adapters? I guess you could leave this as an exercise for the reader after providing a working example for above A little "take home quiz" keeps me sharp!

Thanks!
post #453 of 780
Quote:
Originally Posted by luvdunhill View Post
This is more a general question than anything... Do families of tubes (6922, 6SN7, etc.) have more or less the same sonic signature compared to a common manufacturer (i.e. Amperex 7308 and Amperex 7119)? Or is there really no correlation in either case...

Also, even more generic of a question is how does one determine if a tube will work in a given amp? For example, the European EF86/6267 size. I know I could search the archives, etc. but you guys who "discover" these new tubes to work, there must be a method to your madness, like looking a gain, voltage requirements, etc.. could someone walk me through the process for the 6267? Also, how does one usually choose a tube to be in the driver or gain position? Sorry for asking for major "hand-holding"

Also, there's something of a love affair between me in the Telefunken CCa (6922) tube, and do you think the 7-volt version (the 7DJ8) would possibly work in a MPX3 SE with some of the ECC adapters? I guess you could leave this as an exercise for the reader after providing a working example for above A little "take home quiz" keeps me sharp!

Thanks!
Question #1 .... I dont think there is any hard and fast correlation in either case. 6BL7GT/A's all have a very similar sound to my ears, regardless of the manufacturer. But the 6SN7GT's all have fairly different signatures. RCA tubes tend to have a generally darker, richer house sound .... but there are several types of RCA tubes that dont. GE tubes, for example, are all over the place and I cant say what that brands house sound would be?

Question #2 .... I find them by studying the data sheets. You need to have the same pin out/ wiring and similar specs. Often the data sheets will list suitable subs for particular tubes. I choose a gain tube for its amplification factor and voltage/ current properties. For output tubes I look for a low output impedence and high current delivery.

Question #3 .... he has the new ECC type #2 adapter specificaly for the 6922/6dj8 types, and a few others, so 6922's will undoubtedly work. The 7dj8 will likely work fine. Most tubes have a plus/ minus 10% over/ under voltage range .... 90% of 7 volts = 6.3 volts.
post #454 of 780
Earl,

I download the "Tube Data Sheet Locator" program from here and it seems to be an excellent reference for tube rolling.

Also, I just got my MPX3 SE SLAM in the mail and setup! Check out my new (crappy) avatar!

Thanks all!
-Marc
post #455 of 780
Quote:
Originally Posted by luvdunhill View Post
Earl,

I download the "Tube Data Sheet Locator" program from here and it seems to be an excellent reference for tube rolling.

Also, I just got my MPX3 SE SLAM in the mail and setup! Check out my new (crappy) avatar!

Thanks all!
-Marc
Great resource .... I look something up on this site almost daily.

If you can spend the bucks, at some point, get an adapter and try a 2c51/5670 driving two of the 6bx7gt or 6bl7gta's. This combo absolutely rocks in my MPX3's. You may have to go down to 300 volts if you have a high output source to prevent any hum .... because the 2c51 will possibly overdrive them at 400 volts. But if you have a typical 2 volt output source you may be able to use the 2c51 even at the higher voltage without any noise issues.

A great second choice is the GE 5965 with the 6bx7gt/6bl7gta. You use the ECC TYPE#1 adapter with the 5965 tube .... and the same advice I gave you for the 2c51 applies with the 5965 tube.

Happy listening!
post #456 of 780

7308?

It's been a pleasure reading this thread. Lots of GREAT info.

I have a PPX3 SLAM that sounds very nice with TS 5687s for output, and either a TS oval getter 6SN7 or an RCA redbase 5692 as driver. I'm using Senn HD600s and an Equinox cable.

I have a few Amperex 7308s that sound absolutely gorgeous in the gain position of the Joule Electra Stargates in my main rig. Great detail with superb timbre and smooth balance.

I wonder - how will a 7308 sound in the driver spot of my PPX3 SLAM? It should fit in the ECC type 2 adapter. I haven't seen a comment yet on this tube in a SP amp. Anybody tried this yet?
post #457 of 780
Input for 5687 (I have the SLAM SE Version, but it shouldn't matter) I have used tubes with relatively high mu values with the 5687s to a good result. This includes 6414, 7062/E180CC, 5965s, some 12AV7s, and even a 5751. With the exception of the NOS 5751s, the rest of these tubes are in the $5-$20 range
post #458 of 780
Quote:
Originally Posted by budx3385 View Post
It's been a pleasure reading this thread. Lots of GREAT info.

I have a PPX3 SLAM that sounds very nice with TS 5687s for output, and either a TS oval getter 6SN7 or an RCA redbase 5692 as driver. I'm using Senn HD600s and an Equinox cable.

I have a few Amperex 7308s that sound absolutely gorgeous in the gain position of the Joule Electra Stargates in my main rig. Great detail with superb timbre and smooth balance.

I wonder - how will a 7308 sound in the driver spot of my PPX3 SLAM? It should fit in the ECC type 2 adapter. I haven't seen a comment yet on this tube in a SP amp. Anybody tried this yet?
I dont think many, if any, people have the type#2 adapter yet. So, most people have not tried any of the 7308's. If the tube is a good one I would suspect the sound will be very good. I am still thrilled with the 2c51 in my PPX3 SLAM. Therefore, that tube has not been changed since the Tung Sol 2c51 went in.

The other tube that is surprisingly VERY GOOD is the GE 5965 in my stock Extreme. I usually dont like GE's that well. But with the advent of the adapters, I have come to appreciate several GE tubes. The GE 5965, GE 6414 or 6414W grayplates and GE 6829 triple mica are some favorites .... not to mention the GE 6BL7GTA/ 6BX7GT output tubes.
post #459 of 780
Quote:
Originally Posted by sacd lover View Post
I dont think many, if any, people have the type#2 adapter yet. So, most people have not tried any of the 7308's. If the tube is a good one I would suspect the sound will be very good. I am still thrilled with the 2c51 in my PPX3 SLAM. Therefore, that tube has not been changed since the Tung Sol 2c51 went in.

The other tube that is surprisingly VERY GOOD is the GE 5965 in my stock Extreme. I usually dont like GE's that well. But with the advent of the adapters, I have come to appreciate several GE tubes. The GE 5965, GE 6414 or 6414W grayplates and GE 6829 triple mica are some favorites .... not to mention the GE 6BL7GTA/ 6BX7GT output tubes.
Earl my Extreme came with the GE 5965 and the 2399 combo which I love with my HD 650s and the new cable Mikhail built.

The sound with the K340 is just not right with this combo. So I tried the Sylvania 6SN7GT and to my surprise it sounds great. Just a little shy on the slam any suggestions? I think I have 2 of every addapter Mikhail makes. Including the type #2. Except the 7N7 addapter
post #460 of 780
Quote:
Originally Posted by markmaxx View Post
Earl my Extreme came with the GE 5965 and the 2399 combo which I love with my HD 650s and the new cable Mikhail built.

The sound with the K340 is just not right with this combo. So I tried the Sylvania 6SN7GT and to my surprise it sounds great. Just a little shy on the slam any suggestions? I think I have 2 of every addapter Mikhail makes. Including the type #2. Except the 7N7 addapter
I have only heard the K340 one or two times in my life .... and that was many, many years ago. I dont have any idea what that headphone needs. Is the GE to bright, lacking refinement, analytical or something else? For more slam try one of the higher gain input/ gain tubes like the Amperex 7062. tell me what is missing or needed and maybe I can give you a few tube suggestions to try.
post #461 of 780
The GE 5965 Mikhail supplies is a 5 star 1960's one with twin side getters,at least that's what I have.

How do you rate this tube?
post #462 of 780
Quote:
Originally Posted by Rob N View Post
The GE 5965 Mikhail supplies is a 5 star 1960's one with twin side getters,at least that's what I have.

How do you rate this tube?

I have one he sent me with my ECC adapter, I didnt check the vintage .... and I think the tube is excellent in my stock Extreme. My others are a side getter, grayplate JAN GE tube from 1972 along with several side getter grayplates from 1972; branded Amperex. I still am very smitten with the Tung Sol 2c51. That tube on my MPX3's with 6bl7gta or 6bx7gt's .... and in my PPX3 slam with TS 5687's is just outstanding.
post #463 of 780
What set of tubes do u guys recommend for my MPX3 SLAM to get a very "tubey" sound -- looking for lush, liquid and euphoric -- and a very solid state sound?

For me, I like having a choice of strong opposites, like having a pair of Grados and a pair of Senns rather than finding something in-between.

TIA
post #464 of 780
Now I don't knwo the configuration of your amp, but if you're stuck with 9 pin sockets I'd prboaly look into something like a RCA 6sn7gt driving RCA 5687s for one combo and maybe like a Sylvania 6sn7gt driving Sylvania 5687s

Of course, there are many other tube combos.
post #465 of 780
Now that I think about it, I guess I don't care so much about getting a solid state sound out of the MPX3 ... I could always use my solid state amp for that, lol.

What's the jist of the difference in flavor between the RCA vs Sylvania set u suggest as a possiblity?
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