I have a pair if Sylvannia 6DJ8, Sylvannia 6922, a pair of Electro Harmonix 6922, Sovtek 6N1P, and other unmarked 6922s.
I don't rate my tubes by which is good and which is bad. These tubes have their own character, sort of a personality. I am no tube expert but for me the 6N1P is a warm tube. But that's just me, this things are kinda subjective.
I don't rate my tubes by which is good and which is bad. These tubes have their own character, sort of a personality. I am no tube expert but for me the 6N1P is a warm tube. But that's just me, this things are kinda subjective.
Hi,
Buffers being total negative feedback circuits making it notoriously hard to assess the tube used within that circuit unless it changes the intended operation parameters somewhat.
If a certain application makes the use of a buffer designed around a 6N1P or related tube a useful option I would probably not opt to waste a perfectly good ECC88 in that app either....
For other, more critical apps designed around the ECC88 however the ECC88 shows clearly less harmonic distortion than a 6N1-P would.
Unfortunately correct data for the 6N1-P are rather scarse making design work around it rather more tedious.
Cheers,
Buffers being total negative feedback circuits making it notoriously hard to assess the tube used within that circuit unless it changes the intended operation parameters somewhat.
If a certain application makes the use of a buffer designed around a 6N1P or related tube a useful option I would probably not opt to waste a perfectly good ECC88 in that app either....
For other, more critical apps designed around the ECC88 however the ECC88 shows clearly less harmonic distortion than a 6N1-P would.
Unfortunately correct data for the 6N1-P are rather scarse making design work around it rather more tedious.
Cheers,
Thanks, JojoD. It was my impression too, except that I did not have anything else to compare with, other than a Jolida 502 integrated amp with 12AX7s as drivers (modified to run the push-pull 6550s as triodes). My 6n1p SRPP with a class A DOZ DIY power amp (from ESL) also sounds more lively and clearer than my Jolida. The bass is also more controlled. The 6n1p improved the sound drastically and provided good control over the bass, comparing to my other solid state preamps, as well as comparing to direct link from my CD player to the DOZ. It is the first time that I am quite happy with the sound of my system.
As Frank said, more critical circuits demand lower noise and distortion tubes such as for use with phono preamps and other noise sensitive circuits.
I love my tubes , so my philosophy is to use my tubes where they will sound the best they can. That way I don't have any bad sounding tube.
I hope your aware that the 6N1P has a higher heater current rating than the 6922/6DJ8. Just a reminder.
I love my tubes
, so my philosophy is to use my tubes where they will sound the best they can. That way I don't have any bad sounding tube. I hope your aware that the 6N1P has a higher heater current rating than the 6922/6DJ8. Just a reminder.
I forgot to memtion an oddity about 6n1p's that I found. The Svetlana produces a tube called 6n1p which has completely different characteristic curves from anybody else's. The safest way is to use the spec from the particular tube manufacture's web site if they are still in business. The characteristic curve I attached was obtained from Sovtek a few years back when I built my SRPP. I believe the Svetlana 6n1p's will run much hotter with the same plate voltage and screen biase.
tttking said:
Svetlana has never made any 6N1Ps. The logo on the "Svetlana" 6N1Ps I have is not the Svetlana logo ("winged C").
I would just use the data from the original Russian data sheets - whether Svetlana tubes are used or not. The circuits from the Svetlana 6N1P app. note do work though (the ones I tried at least)...
Best regards,
Mikkel C. Simonsen
some little reading
Using the Svetlana 6N1P Dual Triode in New or Existing Designs
( I see this was already posted before )
Technical bulletins on using Svetlana for audio
Hi-Fi Audio Technical Notes for Using Svetlana Tubes
Using the Svetlana 6N1P Dual Triode in New or Existing Designs
( I see this was already posted before )
Technical bulletins on using Svetlana for audio
Hi-Fi Audio Technical Notes for Using Svetlana Tubes
ArnoldC, just some personal experience to share. My 6n1p srpp sounded somewhat less dynamic, with sweeter highs, a little more open, much more musical and with more controlled bass than my passive amp (with a home made step attennnuator). Over all, the SRPP sounded quite natural and reminded me quite a bit of the live concerts that I have been to. Somewhat weaker bass, a little less clear in the details and a hint of harshnes in the highs though. I am using a good CD source and a DOZ class A power amp. BTW, the Sovtek's sounded better than the Svetlana's in my SRPP.
Some real data for an '80s version, a 6N1P-EV is: at 150 plate volts and -1V on the grid, plate current is 10.75mA, gm is 5.3mS, µ is 37.5, rp is 7.1KΩ.
This is ACCURATE data for the part, taken from a sample of 125 parts on a special test rig of my own construction and processed in an Excel spreadsheet I built.
Best,
Bill Perkins
PEARL, Canada
This is ACCURATE data for the part, taken from a sample of 125 parts on a special test rig of my own construction and processed in an Excel spreadsheet I built.
Best,
Bill Perkins
PEARL, Canada
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