X-10 V3 tubes

[Sol]

So these are of course hard wired into the board. There are "nu-vista triodes" whatever that means? More importantly they have a long life, but should someone fancy playing with them, has anyone tried swopping them out? I assume it is a one way street as you'd need to cut the exisintg tubes off the board, and then repalce with a suitable socket for rolling in some replacements. Are there any replacemnet options out there? Will it make any difference at all?

[bennyboy]

I installed a new set for a guy about 6 months back. He got 10 of them off Ebay for $120.
5 minute job.

[PinkFloyd]

"nu vista" is a JAN philips 6112 and are not intended for socketing Sol. Its thin leads are intended to be soldered into position. Nothing really special about these valves they are simply philips 6112.... MF call them nu vista to add an air of mystery around them

[rickcr42]

Nuvistors were intended as a last gasp answer to the "new" solid state devices that as we now know won the day.

www.tnt-audio.com/clinica/preamble_n.html

[rickcr42]

solid state version of the same preamp

www.tnt-audio.com/clinica/preamble.html

[PinkFloyd]

rickcr42 said:

Nuvistors were intended as a last gasp answer to the "new" solid state devices that as we now know won the day.

www.tnt-audio.com/clinica/preamble_n.html

Or "Nu-Vista" as MF brand them you'll find them on ebay sometimes

[rickcr42]

to be honest with you mike I personally don't like them one bit they having pretty much the same sonics as solid state but having a need for a heater supply more expensive and more complicated to build with so i don't see OR hear any advantges and would rather use the FET gain voltage gain stage/Transistor current gain stage of the solid state version (the FET parts is the same as a grounded cathode stage with the Bipolar Transistor stage the cathode follower part sans tubes )

[Sol]

So ... confused in cambridge as usual!!

So the "tube buffer" X-10 V3 uses a pre-amp? The design of which is basically the Jan 6112 tubes. So there are other Nu Vistors (with appropriate socket?) available to swop to the board! That may sound better?

So I assume every audio circuit has a pre-amp and a power amp circuit! Wh's confused the hell of me is that the "buffer" is actaully another pre-amp ... and I was just looking at the DAC and that has 6 amps? Some of which can be swopped out by www.bursonaudio.com/Burson_HDAM_Module.htm or by simply swopping in a 8pin sopcket and rolling some other opamps!

So there's opamps (Pre-amps?) in the X-DAC V3, NuVistor Amps in the Tube buffer, and power amps in my integrated driving the tweeters, and a power amp in my power amp driving my woofers! (obiously bi-amped) Ohh and lets not foget the power-amp in my X-CAN V3

Totaly confused!
opamps,nuvistors, poweramps! Arrrrggggh! I feel like I wading in to a new language!

Sol 'electronic numpty tpo the stars'

[rickcr42]

So the "tube buffer" X-10 V3 uses a pre-amp? The design of which is basically the Jan 6112 tubes. So there are other Nu Vistors (with appropriate socket?) available to swop to the board! That may sound better?

if you hook up a tube with the Cathode grounded and the output taken from the Anode you get a gain stage that is a factor of the tube "Mu" but if you take that very same tube and hook it up with the output taken from between the Cathode and ground you get zero or unity gain and that with a much lower impedance so will be a "buffer" instead of a "gain" stage

So I assume every audio circuit has a pre-amp and a power amp circuit!

somewhat.

every audio circuit not designed to operate at the pro standard or 600 ohms in/out needs to have a high input impedance so the previous stage can drive it without high end losses PLUS a low impedance output stage so it can drive the cable and the input of the next stage which will again have a high input impedance(opamps have this being a very complicated circuit inside the box) and so on all the way to the final output that drives the actual speaker or headphone where the output levels will need the most "muscle" because the load is the hardest of them all to drive

[bennyboy]

rickcr42 said:

to be honest with you mike I personally don't like them one bit they having pretty much the same sonics as solid state but having a need for a heater supply more expensive and more complicated to build with so i don't see OR hear any advantges and would rather use the FET gain voltage gain stage/Transistor current gain stage of the solid state version (the FET parts is the same as a grounded cathode stage with the Bipolar Transistor stage the cathode follower part sans tubes )

Not to rain on your day, but I can very much hear a tube sound from my 10v3. I've never heard SS sound as good as the 10v3.

[Fergus]

The only equivalents I can find for the 6112 are the CV5007, CV5986 and the CV10566. However, these may be even harder to get than the 6112.

[bennyboy]

fergus said:

The only equivalents I can find for the 6112 are the CV5007, CV5986 and the CV10566. However, these may be even harder to get than the 6112.

Maybe the Reds made some nice ones?

[PinkFloyd]

6112 Pencil Dual Triode

6112: subminiature, 6.3V @ 300ma filament, mu=70, high-mu, general use, computer rated.

CK-6112 Raytheon around $20

6112 Philips USA around $17.50

A 6112: (looks like a double triode valve to me )

[Fergus]

I think Sylvania also made a 6112.

www.mif.pg.gda.pl/homepages/frank/sheets/137/6/6112.pdf

[PinkFloyd]

I still insist the 6112 is NOT a Nuvistor. It is a subminiature valve (tube) as I previously said MF have coined the "Nu-Vista" term to throw an air of mystery around this making out it's something special. A 6922 / E88CC would probably do the same job here? You could remove the "Nu-Vista" solder in a valve base and roll in some E88CC / 6922.... I "think" Same 6.3V heater voltage as per the rest of the MF x-series Come to think of it 6112 is 8 pin, 6922 is 9 pin so wipe that

Have a look at the spec sheet Rick

[rickcr42]

I still insist the 6112 is NOT a Nuvistor

It isn't.Nuvistors are metal can tubes that if on a circuit board kinda look like tall transistors.The 6112 is a sub-minaiture tube also known as a "pencil" tube due to its shape.

Some infor on the Nuvistor (way smaller than the illustration seems it would be):

www.thevalvepage.com/valvetek/Nuvistor/nuvistor.htm

Pencil Tubes for audio use with links to other pages

amps.zugster.net/projects/subminiature

[Fergus]

Everywhere I've looked, they call the 6112s "subminiature tubes... high mu twin triode." "Subminiature" I can understand, but as to the "high mu twin triode"... well, I'm lost.

[rickcr42]

High MU=High Gain
Twin Triode=Two individual triodes in the same glass envelope