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Little Dot Tube Amps: Vacuum Tube Rolling Guide - Page 230

post #3436 of 6839
Quote:
Originally Posted by gibosi View Post
 

 

Jumpers K1 and K2 allow you to switch between 408A tubes, which have 20V heaters, and EF95 tubes, which have 6V heaters. As you have been using EF95 tubes without smoke, or worse, I would assume that these jumpers are already set correctly, that is, for 6J1/EF95. Unless you are intending to use 408A tubes, I would advise that you leave these jumpers alone for now.

They goodness they never smoked. My brother figured it out.

 

Thank you for the help!

post #3437 of 6839

Alright guys, i'm going to hook up the little dot 1+ to my computer and loop a track on repeat until 7 to 8 o'clock. Then i'll see how these GE-JAN 5654W tubes burn in.....

post #3438 of 6839
Quote:
Originally Posted by gibosi View Post
 

 

I feel the same way. I have about 400 of these tubes - single triodes, pentodes and heptodes - and I seriously doubt that I will be listening to any of these in the future... I guess I ought to see if I can sell them....

 

And so far, I have been able to stay below $15/tube, and I feel that this is a bargain for the level of quality I am getting from these 6DJ8. Perhaps my stock $30/pair Siemens are giving me 80% to 90% of a $300/pair Siemens CCa? And perhaps my old ears would not even be able to distinguish between them? lol

 

 

Yes, I am reading this! lol And I will definitely try these 12 volt double triodes. But for now, I have yet to receive all the 6FJ8 I have ordered... and my wallet is begging me to take a pause!  Soon... :)

 

All I can say right now is that I am truly struck by how good my Tele lookalike EI ECC83 are. I spent a whole evening listening to music and movies with these (technically "this", as I'm only using one tube at the moment) and apart from the relative sound quality, the feeling of immersion -being "there" in the sound- is two or three notches above anything else I've tried.

 

It's not subtle or obvious changes, it's simply revolutionary! And I paid less for that tube that what most people paid for a pair of M8100, and the result is so much better it isn't even funny lol... (the M8100 still being my fav' 6AK5 tube this being said)

 

I urge you lads to jump on the double triode bandwagon; we just need to find easier ways to adapt tubes and then we'll be set (then again, adapting a ECC88/6DJ8 tube with my current method is pretty easy actually; it's adapting 12V tubes that's hard for now)!

post #3439 of 6839
I'd there was only more room in the case...

If I could obtain one of the larger tube rings from a MKIII and a nice B9A socket. I would machine a hole down through the case top, surface mount the socket in the middle of the 4 tubes and surround it with the finishing ring from the MKIII.

Take out the two front tubes pop in the 12A?7 and your done. Those MKIV tube protectors are available on eBay in various finishes to give a bit of uniformity to the new tube as well, but you might not even need the other finishing ring with the protector in place.

There are many choices but unfortunately for me other things take precedence right now... I think this is the avenue I will follow when I can assemble the parts, so it looks good as well as functions easily. smily_headphones1.gif
post #3440 of 6839
I was selected for the Burson / Audeze demo program. It should be nice to hear the LCD's through the MK IV, as well as the DT880's with the Conductor.

I can't wait... biggrin.gif
post #3441 of 6839

A pair of Tesla 7DJ8 / PCC88 arrived today, NOS/NIB, made in September, 1970. These cost $27.00, including shipping. Similar to AFB's Ei ECC83, premium pairs of 408A, 6AK5, EF91 and EF92 will cost this much, and more. But these double triodes are so much better....

 

post #3442 of 6839
Quote:
Originally Posted by Audiofanboy View Post
 

 

All I can say right now is that I am truly struck by how good my Tele lookalike EI ECC83 are. I spent a whole evening listening to music and movies with these (technically "this", as I'm only using one tube at the moment) and apart from the relative sound quality, the feeling of immersion -being "there" in the sound- is two or three notches above anything else I've tried.

 

It's not subtle or obvious changes, it's simply revolutionary! And I paid less for that tube that what most people paid for a pair of M8100, and the result is so much better it isn't even funny lol... (the M8100 still being my fav' 6AK5 tube this being said)

 

I urge you lads to jump on the double triode bandwagon; we just need to find easier ways to adapt tubes and then we'll be set (then again, adapting a ECC88/6DJ8 tube with my current method is pretty easy actually; it's adapting 12V tubes that's hard for now)!

Do you know off certain brands to look for, they are about $25 at the least from these vendors.

 

http://www.ebay.com/bhp/ei-ecc83

 

But prices are as low as $13 to $10 from these vendors.

http://www.ebay.com/bhp/ecc83-tube

 

Who should I buy from?

 

Also is there a post that you or someone else has made in regards to modding these tubes in order for them to work with the Little Dot?

I would like to see it.

post #3443 of 6839
Quote:
Originally Posted by Sony Slave View Post
 

Alright guys, i'm going to hook up the little dot 1+ to my computer and loop a track on repeat until 7 to 8 o'clock. Then i'll see how these GE-JAN 5654W tubes burn in.....

I think that is the same one i just got JAN-GE 5654W RN No 2754289 Serial No 2MT84-02555 Dated 3/85.


Edited by i luvmusic 2 - 10/12/13 at 9:23am
post #3444 of 6839

A pair of Reflector 6N23P, manufactured in 1969, just arrived. The 6N23P is the Russian equivalent to the 6DJ8 / ECC88. These were $21.00 shipped, so again, not that expensive....

 

post #3445 of 6839
Quote:
Originally Posted by Audiofanboy View Post
 

 

All I can say right now is that I am truly struck by how good my Tele lookalike EI ECC83 are. I spent a whole evening listening to music and movies with these (technically "this", as I'm only using one tube at the moment) and apart from the relative sound quality, the feeling of immersion -being "there" in the sound- is two or three notches above anything else I've tried.

 

It's not subtle or obvious changes, it's simply revolutionary! And I paid less for that tube that what most people paid for a pair of M8100, and the result is so much better it isn't even funny lol... (the M8100 still being my fav' 6AK5 tube this being said)

 

I urge you lads to jump on the double triode bandwagon; we just need to find easier ways to adapt tubes and then we'll be set (then again, adapting a ECC88/6DJ8 tube with my current method is pretty easy actually; it's adapting 12V tubes that's hard for now)!

 

Hi AFB.

 

Have finally given in and am giving the double triode route a try...but would love your opinion on what I am contemplating...

 

First off, with the price of those adapters looking a bit pricey, I thought of having a go at making my own using some very nice-looking HQ ceramic sockets (similar to yours) with gold-plated 'pins', and cannibalised tube bases - wish me luck!!

 

Secondly, it looks as though the Russian 6N2Ps could be substituted for the ECC88s, even though they are listed as '83's when actually they CAN'T be a straight substitute for the latter...which would be rather nice (if poss.) as they are described as very high quality, and some even say BETTER than your average ECC83. Especially the ER version...

 

So I would be most grateful if you could verify that I am not going to be sending my beloved LD to an early grave!!

 

This may also be of great use to others if this option is OK?...

 

Cheers.

post #3446 of 6839
Quote:
Originally Posted by gibosi View Post
 

A pair of Reflector 6N23P, manufactured in 1969, just arrived. The 6N23P is the Russian equivalent to the 6DJ8 / ECC88. These were $21.00 shipped, so again, not that expensive....

 

How do I make them compatible with the Little dot?

post #3447 of 6839

Bear with me, thinking aloud here....

 

I am expecting some Vector sockets in the post in the mean time I have been looking at other solutions to make adapters. It strikes me that B7G sockets at 10 a penny but B7G plugs (correctly spaced pins) are the hard bit. We could canabalise a tube but I have loads of the UK military black pin protectors that often come with valves. Two or three of these could make excellent support to some pins connected to day a (PCB) valve socket with a suitable tubular cover. In reality you only need two to have straight and correctly spaced pins but three might add stabiity and I have loads! The thing I need to find is a suitable rod, cut or cutable that could make the connection and act as the new pins for these potential socket adapters. Has anyone looked at this previously?

 

An expensive way to buy them but listing shows the items I mean (good seller by the way):

 

http://www.ebay.co.uk/itm/2-x-Pin-straighteners-protectors-for-B9A-B7G-valves-/171004691175?pt=UK_Sound_Vision_Valves_Vacuum_Tubes&hash=item27d0ac82e7


Edited by Nic Rhodes - 10/12/13 at 10:21am
post #3448 of 6839
post #3449 of 6839

If someone made a table of contents for everything and anything to do with little dot tube rolling, that would be amazing!

 

Thank you.

post #3450 of 6839
In the whole thread there is an amazing assemblage of excellent knowledge, if you start at the begining, it is very rewarding. There is also a thread for the LD 1+ as well, which is also chock full of great information about your amplifier.
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