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Any opinions on the JAN Sylvania 5687? I have one with black plates, green ink and a large halo getter. I noticed that Sylvania's were mentioned in a post below discussing 5687's and their variants, but I don't know what vintage mine is. Would black plates=50's production?
Also, I ordered a pair of black plate, D-getter, triple mica GE 5 Star 5670's for my phono stage. How do they stack up to same-era Raytheon and Tung Sol?
Follow Ups:
The Jan tubes that are specifically Sylvanias sound very good in my system. I have a couple 1970s 5687s like the ones you describe and used them in an input tube position in my power amps.
Even though they worked well beyond my expectations -serving that function- I had to roll them. A few minutes of research of this forum yielded a couple of NOS standouts.
The Tung Sol appears to have been the initial maker and has a loyal following . I think the T.S. were the first made in the early 1950s. I sought tubes (new condition if not true NOS), of that vintage. I can't claim a huge difference in sonics between the T.S. and the much less costly JANs, I use them anyway because I think they present a slightly and I mean very slightly bigger soundstage.
The others were 1960s Sylvania gold pins and early Raytheon. The Sylvanias gold pin appear to be very popular.
I stopped using and sold almost all my 5687s after replacing them with Bendix 6900 tubes. That said, if you're interested I have a pair of RCA "bronze-plate" 5687 tubes ---{ even in their original boxes I believe }--- that I'd be willing to just give you so you'd have another completely different sonic option available to try.
If you'd like them send an email to thetubeguy1954(at)yahoo(dot)com and provide me with your address. I'll get them out to you as soon as I can. I know I'm not going to use them and they've been sitting on a shelf now for over 3 years. If you're not interested that's ok too.
Thetubeguy1954
A Rational Subjectivist
What a nice guy.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
A very generous offer, indeed!
"I have one with black plates, green ink and a large halo getter. "
I have 4 of those. Mine all have 6815 on them. 15 week of 1968 I would guess.
I haven't listened to them yet. I'm using 1985 Phillips tubes now.
Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"
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