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Analog Squared Paper Discussion Thread. - Page 206

post #3076 of 3704
I don't have a picture of the base but if i remember there is either a "6" or "9" in the center of the diamond depending on which way up your looking at it. It has the "B" letter with a bunch of numbers printed vertically on the tube glass.

Here are a couple of quick snaps of the box and tube in situ.




post #3077 of 3704
Quote:
Originally Posted by ianmedium View Post

I don't have a picture of the base but if i remember there is either a "6" or "9" in the center of the diamond depending on which way up your looking at it. It has the "B" letter with a bunch of numbers printed vertically on the tube glass.

Here are a couple of quick snaps of the box and tube in situ.




Thanks.  I have may be the same... :-)

post #3078 of 3704
I got mine from the Canadian tube company DB tubes if thats any help.
post #3079 of 3704
Thanks Ian, Going to try a pair.
post #3080 of 3704
Just been listening now WC, I think these have been the best so far right out of the box as well. Really nice tight bottom end on them.
post #3081 of 3704
Quote:
Originally Posted by ianmedium View Post

Just been listening now WC, I think these have been the best so far right out of the box as well. Really nice tight bottom end on them.
That's kinda why I've been working out towards but not there yet :-).
post #3082 of 3704
I think these would work really well with the 06. Tight bottom end, lovely soundstage and a top end that just goes on and on. I am so glad I got to hear a proper pair at last. These were made in Berlin in 1979 so they are the youngest tubes I own as well. Just think, I was in my penultimate year at senior school when these were made!
post #3083 of 3704
post #3084 of 3704
Thanks GG, the cheapest pair there though is $30 including shipping and the rest much more and my German is bad, do they say where and when they were made as that makes a huge difference I find. To be clear the ones I purchased with a standard test were $15US each plus $3US shipping per tube. So not only are they cheaper your getting them tested in the box and all the stock is Berlin 1979. So even if your in Europe its cheaper to buy them from Canada!
post #3085 of 3704
yes, prices here for df and dl tubes got higher and higher and now have reached a level i would call too high.
Edited by GermanGuy - 1/22/14 at 1:51pm
post #3086 of 3704
Yeah, the prices are crazy for the tubes I feel. thankfully there are other sources, particularly in the UK and North America that seem to change a reasonable price. I would buy from David (DBtubes) any day. I have not had a bad tube from him and he is one of the few I would pay a bit more for.
post #3087 of 3704

just a short status update:

 

these days most of the time just listening to my modded amp and enjoying listening to music and give the amp some burn-in time.

 

in the meantime i modified the original schematic and my amp to get my build more resistent against RF interferences and self- or induced HF oscillation.

 

i bought a b/w laser printer to print pcb designs on transparent foil and an uv exposure unit for the pcbs, so self production can start this weekend if all parts have arrived until friday.

 

found an excellent and free pcb design suite (DESIGNSPARK) i will use for the layouts.

 

i ordered all the components and parts for an improved voltage filter and this time also stabilization board with separated voltages for each tube and voltage (filament / anode), so having both 4 filament and 4 anode voltage outputs, and also ordered the components for a highend version of my tu-05 mod:

 

- 0.1% metal oxide resistors

- ELNA SILMIC II and some Nichicon MUSE electrolyte capacitors

- Big MUNDORF electrolyte capacitors for the anode voltage stabilization

- Mundorf Supreme SILVER / OIL capacitors for the hole signal path

- lots of WIMA MKP foil capacitors and ferrite inductances for the voltage filter board

 

i have everything ready to build a double mono charger / power supply, but at first have to design the custom pcb for the psu.

 

i really can't wait to hear if this highend capacitors really make a difference. i did a lot of reseach in the internet but did not find even one highend tube headphone or other amp with the df / dl tubes.

 

P.S. not to forget - i had a telephone conversation with Mr. Reinhöfer so i will get a feedback for two custom input transformers.


Edited by GermanGuy - 1/22/14 at 2:30pm
post #3088 of 3704

Always fascinating reading your updates GG. You might find this article interesting - http://www.humblehomemadehifi.com/Cap.html - as the author tests over 75 capacitors in a loudspeaker crossover then rates them subjectively according to how they sound. I have a DAC that uses Duelund CAST-Cu capacitors and it sounds wonderfully analogue.  

 

Quote:

Originally Posted by GermanGuy View Post
 

just a short status update:

 

these days most of the time just listening to my modded amp and enjoying listening to music and give the amp some burn-in time.

 

in the meantime i modified the original schematic and my amp to get my build more resistent against RF interferences and self- or induced HF oscillation.

 

i bought a b/w laser printer to print pcb designs on transparent foil and an uv exposure unit for the pcbs, so self production can start this weekend if all parts have arrived until friday.

 

found an excellent and free pcb design suite (DESIGNSPARK) i will use for the layouts.

 

i ordered all the components and parts for an improved voltage filter and this time also stabilization board with separated voltages for each tube and voltage (filament / anode), so having both 4 filament and 4 anode voltage outputs, and also ordered the components for a highend version of my tu-05 mod:

 

- 0.1% metal oxide resistors

- ELNA SILMIC II and some Nichicon MUSE electrolyte capacitors

- Big MUNDORF electrolyte capacitors for the anode voltage stabilization

- Mundorf Supreme SILVER / OIL capacitors for the hole signal path

- lots of WIMA MKP foil capacitors and ferrite inductances for the voltage filter board

 

i have everything ready to build a double mono charger / power supply, but at first have to design the custom pcb for the psu.

 

i really can't wait to hear if this highend capacitors really make a difference. i did a lot of reseach in the internet but did not find even one highend tube headphone or other amp with the df / dl tubes.

 

P.S. not to forget - i had a telephone conversation with Mr. Reinhöfer so i will get a feedback for two custom input transformers.

post #3089 of 3704

thanks a lot for this link, a great review and summary i always was looking for, after having red the article i think i have choosen the right capacitors for my needs.

 

good news (1): the parcel with the uv exposure unit arrived today.

good news (2): the parcel with the colorfly c4 also arrived.

excellent news (3): they did not repair the colorfly, i got a sealed and boxed new one!


Edited by GermanGuy - 1/23/14 at 10:00am
post #3090 of 3704
That's great customer service GG! I got a me iPad air last November, noticed a couple of weeks ago a tiny black spec not even a mil across under the glass. Went to the apple store and they replaced the whole thing with a brand new one. Things go wrong, it's how they are rectified that matters.
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