Originally Posted by moonboy403 /img/forum/go_quote.gif I just tried out a Raytheon 5751 and Sylvania 5751(black plate/yellow lettering) on the Jade. They sound VERY nice.
Cool. I'll look for a Raytheon, too. Are there black/gray variants of this one, too? What specific details should I look for?
Originally Posted by PaulyT /img/forum/go_quote.gif Cool. I'll look for a Raytheon, too. Are there black/gray variants of this one, too? What specific details should I look for?
I'm a noob in tubes too.
I don't wanna give out some bad advice! So you better ask the more experienced members here.
I have many of the 5751's. In Sylvania I have NOS in the Gold Pin and prefer the grey plate. They hold up longer and are more even.
Also, military tubes were always more rugged just better picked, sometimes. They came off the same lines. Yes there were ruggedized versions, but these could often be bought as civilian models also. Most were just branded as JAN etc. I have version branded both ways and they are the same construction. Having been in the Navy as a radioman during the time when tubes were used, I didn't see them lasting any better than the civilian tubes.
I like the 6N1P 1965 black plate as much, IF, biased right. If not biased right with the right voltage then you won't get what the 6N1P has to offer. Run it hot.
Many of the later JAN 6DJ8's sound terrible and I wouldn't use them for much of anything.
Originally Posted by moonboy403 /img/forum/go_quote.gif I'm a noob in tubes too.
What, you're a noob but you happen to have all the highly desirable tubes that I've spent almost the past 2 days straight trying to track down?! How the hell did you manage that?
Originally Posted by PaulyT /img/forum/go_quote.gif What, you're a noob but you happen to have all the highly desirable tubes that I've spent almost the past 2 days straight trying to track down?! How the hell did you manage that?
I'm very jealous.
I've been constantly browsing on ebay for weeks trying to find the Sylvania and Raytheon!
Originally Posted by Jon L /img/forum/go_quote.gif It's too bad certain 5751's have attained such notoriety (I blame Joe's Tube Lore) and now have become overpriced IMO.
Yes, 5751's are great (I've tried most including Sylv TM BP), but the *REAL* killer deals in 5751/12AX7 are the wonderful 12AX7A's that have not been so hyped up yet. For example, get yourself some Sylvania 7025 (12AX7A) or Raytheon 12AX7A and prepare to be amazed
See, for headphone amps I disagree. The lower gain (and almost 100% of the time lower noise) of the 5751 is a huge benefit in a headphone amp application versus a 12AX7. I have the Sylvania 7025's, as well as Bugle Boys, RCAs, Raytheons, as well as Mullard CV4004's - and they are all good, but the 5751 is just better suited for headphone amp use IMO.
After spending the last 2 hours listening to music through the Raytheon and Sylvania, I've came to the conclusion that I prefer the Sylvania (initially preferred the Raytheon because of the depth it provides to the soundstage).
The Sylvania's seductive midrange grew on me. It has better details and sounds more lively overall compared to the Raytheon. IMO, the Raytheon has a little more air and though depth is impressive upon first listening, it places the singer a bit too far back to MY liking.
Originally Posted by Skylab /img/forum/go_quote.gif See, for headphone amps I disagree. The lower gain (and almost 100% of the time lower noise) of the 5751 is a huge benefit in a headphone amp application versus a 12AX7. I have the Sylvania 7025's, as well as Bugle Boys, RCAs, Raytheons, as well as Mullard CV4004's - and they are all good, but the 5751 is just better suited for headphone amp use IMO.
That's true for most traditional 'phones or systems with a lot of gain already.
Yes, I do listen to my lovely speaker system most of the time these days, but my electrostats also love the 12AX7A's a bit more.
Quote:
Originally Posted by moonboy403 /img/forum/go_quote.gif I just tried out a Raytheon 5751 and Sylvania 5751(black plate/yellow lettering) on the Jade. They sound VERY nice.
Originally Posted by Skylab /img/forum/go_quote.gif See, for headphone amps I disagree. The lower gain (and almost 100% of the time lower noise) of the 5751 is a huge benefit in a headphone amp application versus a 12AX7. I have the Sylvania 7025's, as well as Bugle Boys, RCAs, Raytheons, as well as Mullard CV4004's - and they are all good, but the 5751 is just better suited for headphone amp use IMO.
5751's are also wonderful for taming an overly hot gain stage(s) in a guitar amp. They are also excellent in the primary V1 slot of the amp reducing gain overall in the latest gen Marshall's... (I have the JVM 410H and love the 5751 in V1).
Sorry for the OT type post but I agree with Sky...sometimes less gain is a really good thing.
An ebay seller is telling me I should try a Telefunken ECC801S. From what I can tell, this seems to be equivalent to a 12AT7, which is just slightly lower gain than a 5751 (60 vs 70, respectively). Anyone had any experience with this tube? Gets good "press" by a quick google search.
Originally Posted by PaulyT /img/forum/go_quote.gif Hi! In my quest for tubes for my Audiotailor Jade, I'm looking for a Sylvania 5751. Right now I'm just trying to understand the distinctions (or equivalences) between the different models of this specific tube+manufacturer. And yes I've read "Joe's Tube Lore" which goes into some of this.
Seems there are at least four different categories here, some of which may actually be the same:
1) Gold Brand, black plate
2) Gold Brand, grey plate
3) JHS (yellow lettering), apparently grey or black plate?
4) JAN (green lettering) (see ebay item #300298780107)
5) "generic" black plate (yellow lettering) (see ebay item #180332863389)
Ok, so Joe says that JHS is the same as Gold Brand. What about JAN though? Some ebay sites say they are just a newer (70's) version of Gold Brand (50's and 60's). Is that right? In terms of sound, would the JAN be equivalent to an (older) Gold Brand?
What about #5? Looking at the ebay page, it's got black plates and yellow lettering, but neither the box nor the stamp say Gold Brand, does that mean it's an inferior product? Are all Gold Brand explicitly labeled on the tube as such? Or is anything with a yellow label on the tube a Gold Brand?
Thanks for any info!
I never said labels = labels (meaning JAN = GB)
When I made those posts back in the prehistory of the AA forum I was referring to the older black plate 5751s. These were made back in the 50s and could have a variety of labels - GB, CAA, JAN, JHS, etc. The thing you need to look for are tube structures and plates. What I called triple mica (like those in the pics below) - with a third mica spacer near the top of the tube which the getter wire touches - and black plates. The later Sylvanias with grey plates, and no top spacer generally sucked. The grey plate gold brands with the top spacer are pretty good, but I still think the black plates are the best.
A sample of black plates ranging from gold brands to gold CAA labels to yellow and green JHS labels are shown below. All are identical in manufacture and sonics....
Thanks! Those are excellent pictures for comparison, very useful. Yes, I'm definitely focused on this black plate version, now just gotta find one out there...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
