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Analog Squared Paper Discussion and Appreciation Thread. - Page 43

post #631 of 3488
I use a wooden box that I found in a thrift store, it has a lid that closes securely. Forty tubes in their boxes fit nice and snugly with room to spare for another forty biggrin.gif . One side is 3S4, the other 1T4 with a piece of card separating them.

And just to add to my OCD reputation I have also graded the tubes 1 through 5, 1 being the best 5 being great but not as good as 1! I just wrote the numbers on the boxes. Also I have a piece of paper in the box telling me which pairings work best.. Yeah, I know, OCD! blink.gif

For humid environments I reckon some of those silica sachets in the box would do the trick!
post #632 of 3488
Quote:
Originally Posted by ianmedium View Post

One of the things I loved and i hope he still does this is to put a little label on the inside with the date of completion of the build and signed by him.. Here is mine

Warning: Spoiler! (Click to show)

 

 

This is probably crazy (on my part), but this description (and photo) are a significant part of what led me to purchase this amp. Where are my crazy pills...?

post #633 of 3488
Quote:
Originally Posted by woodcans View Post

This is probably crazy (on my part), but this description (and photo) are a significant part of what led me to purchase this amp. Where are my crazy pills...?

Join the madness! biggrin.gif I keep pinching myself when I realize what a truly unusual amp we all have. Just think about these facts combined..

As far as I am aware this is the worlds first portable battery powered Single Ended Triode class A tube amplifier. Likewise I have searched and searched and have found no other amplifier that uses this type of Vacuum tube in this particular application. Add in that each one is bespoke made to order for its designated customer but one man, not a team or a factory, just one man.

Like all the greatest things so often the best of them ends coming from one man or woman's unique vision..

I know I sound a bit soppy and fan boyish but I tell you. I have had this amp just over 6 months and still to this day it feels like a special event switching it on and listening to music! The only other piece of HiFi gear I have the same sort of feelings with are my Piano Forte's.. Oh wait, yet another thing made by those wonderful and passionate Japanese designers.. I love stuff made in Japan!
Edited by ianmedium - 6/29/13 at 9:49pm
post #634 of 3488
Quote:
Originally Posted by ianmedium View Post


Join the madness! biggrin.gif I keep pinching myself when I realize what a truly unusual amp we all have. Just think about these facts combined..

As far as I am aware this is the worlds first portable battery powered Single Ended Triode class A tube amplifier. Likewise I have searched and searched and have found no other amplifier that uses this type of Vacuum tube in this particular application. Add in that each one is bespoke made to order for its designated customer but one man, not a team or a factory, just one man.

Like all the greatest things so often the best of them ends coming from one man or woman's unique vision..

I know I sound a bit soppy and fan boyish but I tell you. I have had this amp just over 6 months and still to this day it feels like a special event switching it on and listening to music! The only other piece of HiFi gear I have the same sort of feelings with are my Piano Forte's.. Oh wait, yet another thing made by those wonderful and passionate Japanese designers.. I love stuff made in Japan!

 

 

Yes. 

post #635 of 3488
Quote:
Originally Posted by ianmedium View Post

.... and still to this day it feels like a special event switching it on and listening to music! The only other piece of HiFi gear I have the same sort of feelings with are my Piano Forte's...

 

 

...exactly. Can't wait.

post #636 of 3488

On my personal saga searching for those tubes, I encountered several local tube stores who always gave me the face.

Well, yeah... you know... The face... blink.gif

 

Then it always followed with the question "Those are for old radio, right?"

"Yup"

Then the answer "Sorry, we don't have it. Just wondering why are you looking for them?"

 

Now with Ian's writings above, it tickles my curiosity what other amps are using these tubes, especially nowadays... 

post #637 of 3488
Quote:
Originally Posted by ianmedium View Post

I use a wooden box that I found in a thrift store, it has a lid that closes securely. Forty tubes in their boxes fit nice and snugly with room to spare for another forty biggrin.gif . One side is 3S4, the other 1T4 with a piece of card separating them.

And just to add to my OCD reputation I have also graded the tubes 1 through 5, 1 being the best 5 being great but not as good as 1! I just wrote the numbers on the boxes. Also I have a piece of paper in the box telling me which pairings work best.. Yeah, I know, OCD! blink.gif

For humid environments I reckon some of those silica sachets in the box would do the trick!

 

Another excellent input. Thanks Ian. 

post #638 of 3488
From what I can see the only other use is for vintage radios, the use they were originally intended for. There is quite a large vintage radio community. A lot of folks restore them for pleasure and of course the wonderful sound quality!

My famous Lorenz tubes went into this portable radio.. (images are from the excellent radiomusem web site and below the pictures is a link to the page giving descriptions. As far as I know our amp is the only amp only application for these tubes!




http://www.radiomuseum.org/r/lorenz_weekend_m_l.html
post #639 of 3488

i did some additional tests to get this tube cleaning process optimized:

 

the fiberglass stick with shrink-on tube is not that super effective and efficient because you need a new stick every 4 to 5 pins.

 

so i made sticks out of different materials:

 

 

from left to right:

 

- a stick filled with sand and super glue (hard as rock)

- fiberglass with super glue

- stick with moddeling clay

 

none of this sticks had a good cleaning effect, and also cleaning with a stick remains a sequential process so wasting time.

 

to come to an end, i made a toolset based on another idea i had to clean all pins at once, so here is my final solution i will use to clean my tubes:

 

 

the toolset consists of

 

- plain sand (from a beach volleyball field nearby)

- a foam rubber disk 2 mm thick

- a wood disk 1.1 cm thick

 

i dried the sand in my convection oven and used a sieve to remove little stones and other particles (the sand shown in the picture is not cleaned).

 

i had the wood disks 'on stock' to make y-splits for headphones, but here i used a shaping tool to shape a ring into the wood just of the size that the tube pins will fit (depth 8mm).

 

i pressed the tube pins onto the foam rubber disk then making small holes where the impressions of the pins were.

 

here is a closer view where you also can see the pins of an uncleaned tube (you will see the cleaning result - a prove of concept would be nice i thought - later):

 

 

how to use the tools:

 

 

put the foam rubber disk over the tube pins to protect the tube during the cleaning process.

 

 

 

fill the shaped ring of the wood disk with sand.

 

 

press the pins into the shaped ring filled with sand.

 

cleaning procedure:

 

- hold the wood disk in one hand and the tube in the other hand

- slighty pressing them together the foam rubber disk also prevents the sand from falling out of the shaped ring

- rotating the wood disk by turning one hand clockwise and the other hand counter-clockwise (and vice versa) will clean all pins at once!

 

cleaning result (i used a stop watch here to have comparable results that can be verified):

 

this is the cleaning result of

 

- 60 seconds of cleaning with sand

- additional 60 seconds of cleaning with sand saturated with alcohol

- cleaning the pins with compressed air to remove sand particles (3 seconds smile.gif)

 

showing the uncleaned tube posted above now cleaned:

 

 

i am sure that the result can further be improved by also using for example that cleaning powder used for stainless steel kitchen parts.

 

that's all! and have a nice and now short cleaning time!

 

P.S. the sample tube shown is a german Telefunken one, so i just used ethanole as alcohol, for uk tubes i strongly recommend Glenfiddich Single Malt Whisky Special Selection :-)


Edited by GermanGuy - 6/30/13 at 8:16am
post #640 of 3488
That's phenomenal, GG!!
post #641 of 3488

Bravo GG.

This will incredibly give a lot.. a lot of help in tube cleaning.

Thanks.

post #642 of 3488
GG,

OUTSTANDING sir! Absolutely outstanding! Your brain and thought processes work in remarkable ways!

I wonder if this stuff (garnet powder) would be a good replacement for the sand as it is even finer and would polish the pins at the same time as deoxidizing them?
http://gmd-cologne.com/en/garnet_powder_en.html

Just as this amp is the first of its kind your cleaning process is the first of its kind as far as I am aware, I love it!

I can't wait to see your solution for supporting the amp, would you care to share your thoughts on the forum as well as I think they sound as amazing and innovative as this pin cleaning solution!
post #643 of 3488

thank all of you for your comments!

post #644 of 3488

ianmedium - as you have seen the picture of the cleaning result i would highly appreciate a comment of you, if the result looks ok on that picture as you are the most experienced one here having cleaned all of your tubes before.

post #645 of 3488
GG, those pins are immaculate, they look perfect. I reckon the garnet powder would give them a nice shine as well!
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