I don't know where to get REAL 50's...but diyhifisupply sells the modern ones.
around 3-4 watts it seems
An externally hosted image should be here but it was not working when we last tested it.
around 3-4 watts it seems
An externally hosted image should be here but it was not working when we last tested it.
datasheets
Thanks. Is the one you posted of an NOS?
I can’t any TJ datasheets, but requested them of Brian at diyhifisupply.
(OT: I see there is a big $ “300B+ Premium Graphite Plate” they claim: “With 1K5 OPT and 400/120ma, fixed bias you can get a whopping 20+ watts from these: 845 slayer”!
Anyone heard a 50? I read today they sound better than 45s!
Thanks. Is the one you posted of an NOS?
I can’t any TJ datasheets, but requested them of Brian at diyhifisupply.
(OT: I see there is a big $ “300B+ Premium Graphite Plate” they claim: “With 1K5 OPT and 400/120ma, fixed bias you can get a whopping 20+ watts from these: 845 slayer”!
Anyone heard a 50? I read today they sound better than 45s!
Konnichiwa,
The original 50 had quite a bit of gridemission which requires very low gridcircuit resistances (< 10kOhm) and requires a lot of grid swing, making a driverstage that does that is a little non-trivial.
The TJ 50 is probably not subject to these problems, but it also seems to be not quite a real 50, but a rather good item in it's own right.
Sayonara
rick57 said:
The original 50 had quite a bit of gridemission which requires very low gridcircuit resistances (< 10kOhm) and requires a lot of grid swing, making a driverstage that does that is a little non-trivial.
The TJ 50 is probably not subject to these problems, but it also seems to be not quite a real 50, but a rather good item in it's own right.
Sayonara
I split of the 300b+ part
but there was one question and answer that needed to be in both treads (I apologize for the inconvenience)
Cheers
400v/100ma
Gordon Rankin: "The TJ mesh sound is pretty similar in comparison to the sound of the TJ Mesh 300B. The nice thing over the 300B is that it appears to have more umph. Which I think can be attributed to the higher potenial energy in the filament. The NOS RCA and TungSol I have here are a bit more clearer, focused and extended, but not as powerfull. In general I prefer the NOS over the TJ, except for the price. If you are looking for a more romantic sound I would go with the TJ."
but there was one question and answer that needed to be in both treads (I apologize for the inconvenience)
Brian's answer :
Cheers
400v/100ma
Gordon Rankin: "The TJ mesh sound is pretty similar in comparison to the sound of the TJ Mesh 300B. The nice thing over the 300B is that it appears to have more umph. Which I think can be attributed to the higher potenial energy in the filament. The NOS RCA and TungSol I have here are a bit more clearer, focused and extended, but not as powerfull. In general I prefer the NOS over the TJ, except for the price. If you are looking for a more romantic sound I would go with the TJ."
Raj1 said:
I built a 50 amp, and it was posted (and most likely buried) here in the forum
edit:
oh, here it is - http://www.diyaudio.com/forums/showthread.php?s=&threadid=54336&highlight=
and the pictures
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
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