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Little Dot Tube Amps: Vacuum Tube Rolling Guide - Page 400

post #5986 of 10586
Quote:
Originally Posted by Rossliew View Post
 

Hi Gibosi / Nic, i plan on using them as plug in replacements for the stock power tubes. I have ordered the adapters and socket savers so once these arrive, i can start ordering some 6SN7s. Does this mean i can safely use both old and new CV181 tubes?

 

On 6SN7 tubes, can I also safely use the different variants like 6SN7GTA/GTB/GTC ones? Thanks again!

 

Yes, you can safely use both old and new CV181 tubes. And yes, you can safely use all versions of the 6SN7.

 

Enjoy. :)

post #5987 of 10586
Quote:
Originally Posted by gibosi View Post
 

 

Yes, you can safely use both old and new CV181 tubes. And yes, you can safely use all versions of the 6SN7.

 

Enjoy. :)

Wonderful !! Now, i need to spend more time searching...and money LOL!

post #5988 of 10586

So damn tall this thing is...

 

 

 

Adapter is here!

 

Initial impressions are very good... more dynamic the anything I've tried so far.... good mids... sweet treble and well textured bass... I'll need some time to really get to know this tube and compare it to my 6SN7's.


Edited by kvtaco17 - 4/29/14 at 1:03pm
post #5989 of 10586

Oh schiit i'am SCREWED i just received my 12A(after over a month waiting for it) regulator from Chinada and i decided to unsolder the trim pot so i can install a external pot on the amp faceplate and i burnt the PCB i managed to solder a solid wire on the PCB only to find out the trace are burnt.

post #5990 of 10586
Quote:
Originally Posted by i luvmusic 2 View Post
 

Oh schiit i'am SCREWED i just received my 12A(after over a month waiting for it) regulator from Chinada and i decided to unsolder the trim pot so i can install a external pot on the amp faceplate and i burnt the PCB i managed to solder a solid wire on the PCB only to find out the trace are burnt.

 

That sucks! I'm sorry, it happens though when you tinker... trust me I've ruined my fair share of amps and cans...

post #5991 of 10586
Quote:
Originally Posted by kvtaco17 View Post
 

 

That sucks! I'm sorry, it happens though when you tinker... trust me I've ruined my fair share of amps and cans...

Will i just bought another regulator(same as the one that i screwed up)and this time no more desoldering for me or maybe for now.

post #5992 of 10586
Quote:
Originally Posted by kvtaco17 View Post
 

So damn tall this thing is...

 

 

 

Adapter is here!

 

Initial impressions are very good... more dynamic the anything I've tried so far.... good mids... sweet treble and well textured bass... I'll need some time to really get to know this tube and compare it to my 6SN7's.

Now that is what you call Tower of Power.:biggrin:

post #5993 of 10586
Quote:
Originally Posted by i luvmusic 2 View Post
 

Now that is what you call Tower of Power.:biggrin:

Its getting out of hand... its more then a foot tall... lots of height for a little amp lol

post #5994 of 10586

Hi,

 

Want to try an inexpensive and fairly unknown great driver tube? Try the 6BC8 (also known as 6BZ8 or X155) which is a dual triode in the 6DJ8 family. Balanced, sweet and detailed with laid back sound. Only con is that I have to turn up the volume more than usual.

 

These tubes were made by all the big manufacturers, and I have Sylvania, Tung Sol, CBS, RCA and GE variants.

 

This Sylvania 6BC8 has a nice glow with four heaters:

 

Would be curious to know if somebody has tried this tube.

 

I am using octals as power tubes

post #5995 of 10586

Big Brother has arrived - a 1976 RCA 6AS7G tube. Can it be used with the LD MKIII as a driver tube with an amplification factor of 2?

 

Man, this tube is BIG (compare to the 6SL7 power tube in the background.). What about the show-off factor?

Hard to get all the glowing wires into one view. Is it usable? Yes, but instead of keeping the headphone volume at 9 o'clock I have to turn it to almost max at around 4 o'clock.

First impression of sound: Hefty strong bass with a nice laid back mellow presentation with very good detail. There is a total absence of sibilance in the treble;  but no wow factor - I guess that I am a little spoiled from all the great tubes we'd tried lately. Could be that the tube needs burn in so things may change - this is only the initial impression.

 

Patience pays off: Been looking for inexpensive 6AS7 and 6080 tubes. Finally found this tube, a bunch of 6080's + three other SN tubes. All in all 11 tubes for less than $2 each shipped from two different sellers.

 

This tube needs a diet of 7.11V from the voltage regulator to get 6.3V at the tube pins.

 

After listening for a while this tube is starting to grow on me (pun intended). I can "see" into the recordings and notice new micro details. The instrument separation is excellent without being artificially analytical. Have to take back what I said about the wow factor - it's just not a wow factor in your face, but, yes it's there, but more subtle.

 

Happy tube rolling!

post #5996 of 10586
Quote:
Originally Posted by mordy View Post
 

Big Brother has arrived - a 1976 RCA 6AS7G tube. Can it be used with the LD MKIII as a driver tube with an amplification factor of 2?

 

Man, this tube is BIG (compare to the 6SL7 power tube in the background.). What about the show-off factor?

Hard to get all the glowing wires into one view. Is it usable? Yes, but instead of keeping the headphone volume at 9 o'clock I have to turn it to almost max at around 4 o'clock.

First impression of sound: Hefty strong bass with a nice laid back mellow presentation with very good detail. There is a total absence of sibilance in the treble;  but no wow factor - I guess that I am a little spoiled from all the great tubes we'd tried lately. Could be that the tube needs burn in so things may change - this is only the initial impression.

 

Patience pays off: Been looking for inexpensive 6AS7 and 6080 tubes. Finally found this tube, a bunch of 6080's + three other SN tubes. All in all 11 tubes for less than $2 each shipped from two different sellers.

 

This tube needs a diet of 7.11V from the voltage regulator to get 6.3V at the tube pins.

 

After listening for a while this tube is starting to grow on me (pun intended). I can "see" into the recordings and notice new micro details. The instrument separation is excellent without being artificially analytical. Have to take back what I said about the wow factor - it's just not a wow factor in your face, but, yes it's there, but more subtle.

 

Happy tube rolling!

IMO this 6AS7 tube have a bigger soundstage than any of my 6SN7's.For the MK III you are right about the volume.I used this tube most of my listening with LD 1 and Q70i.

post #5997 of 10586

It's not only sound nice it looks nice too.

post #5998 of 10586
Quote:
Originally Posted by mordy View Post
 

Big Brother has arrived - a 1976 RCA 6AS7G tube..........

 

Man, this tube is BIG (compare to the 6SL7 power tube in the background.)........

 

Boy, I wish I had some BIG tubes! lol :)

 

At first I thought, this is backwards! The 6SL7 should be the driver and the 6AS7G should be the power tube! But now I wonder... aside from gain, does the order of the tubes, first or second, make a difference? If you could swap them, making the 6AS7G the power tube, would the "sound" be the essentially same?

 

I hope someone will cobble together an adapter to run 6AS7's as power tubes in their LD and let us know.....

post #5999 of 10586

I tried running one side  6AS7 as a power tube and the other side is 6SN7 and driver is 6SN7 and the sound is lacking in power on 6AS7 side but it's smooth sounding. As for the amp did not get warm at all i run it for 15 mins.So far i can't try running two 6AS7 power tubes because my regulator can't handle the current(i just screwed up my 12A)


Edited by i luvmusic 2 - 5/1/14 at 4:14pm
post #6000 of 10586

Can i used just one 6AS7 Power tube for left and right channel?

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