Little Dot Tube Amps: Vacuum Tube Rolling Guide
Aug 16, 2013 at 7:32 PM Post #2,431 of 13,432
Hi G,
 
Just thought it was funny. You are right, no US tube with EK90 on it. Here is another mystery tube 6BE6:
 
http://www.ebay.com/itm/THE-FISHER-6BE6-VACUUM-TUBE-VERY-CLEAN-TESTED-GOOD-SEE-PHOTOS-Z-TJM-647-/251224516351?pt=Vintage_Electronics_R2&hash=item3a7e25e6ff
$%28KGrHqRHJEUFELriI0CSBREB+JsFKw%7E%7E60_57.JPG

 
This tube is made in West Germany but don't know by whom.
 
Aug 16, 2013 at 8:05 PM Post #2,432 of 13,432
Quote:
Hi G,
 
Just thought it was funny. You are right, no US tube with EK90 on it. Here is another mystery tube 6BE6:
 
http://www.ebay.com/itm/THE-FISHER-6BE6-VACUUM-TUBE-VERY-CLEAN-TESTED-GOOD-SEE-PHOTOS-Z-TJM-647-/251224516351?pt=Vintage_Electronics_R2&hash=item3a7e25e6ff
$%28KGrHqRHJEUFELriI0CSBREB+JsFKw%7E%7E60_57.JPG

 
This tube is made in West Germany but don't know by whom.

 
The off-set holes suggest Telefunken:
 

 
Aug 17, 2013 at 1:09 AM Post #2,433 of 13,432
Hey guys, so I recently bought a MKIII off of eBay with some Voshkod tubes for my DT990 Pro and Sound Blaster Z. 
 
Now I am in a little bit of a pickle in regards to tube rolling the power tubes... it is a rev.2 board, so I am considering the Novosibirsk 6H6P-I and the Electro Harmonix 6H30Pi. Any suggestions for which might sound "better" for my DT990, and if there are any major discernible differences between the two. Only thing holding me back from the EH tubes is the $25 dollar price difference. 
 
I am also open to other suggestions for power tubes as well.
 
Thanks in advance.
 
Aug 17, 2013 at 9:26 AM Post #2,434 of 13,432
Hi Frankie, if you go through the posts, and I would suggest to do that from page 50, you will find information to which power tubes are available, which year to choose and what people like. The information is more sparse than for driver tubes.
In short: I wouldn't bother with 6N6P-I and 6N30P (=6H30P) or 6N30P-EV. My recommendation would be 6N6P-IR or 6N30P-DR if you feel generous :). Buy both before 1984 because the quality of production changed thereafter.
 
Aug 17, 2013 at 11:16 AM Post #2,435 of 13,432

 
the GE 6ce5/6bc6, not the best sounding tube i have, but it sure does glow !
 
Aug 17, 2013 at 11:53 AM Post #2,436 of 13,432
Quote:
Hi Frankie, if you go through the posts, and I would suggest to do that from page 50, you will find information to which power tubes are available, which year to choose and what people like. The information is more sparse than for driver tubes.
In short: I wouldn't bother with 6N6P-I and 6N30P (=6H30P) or 6N30P-EV. My recommendation would be 6N6P-IR or 6N30P-DR if you feel generous :). Buy both before 1984 because the quality of production changed thereafter.

Hey man, thanks for your reply, I appreciate it. Well I definitely DO NOT have the time to read 600 pages of this thread, however I have been sporadically reading and that is where I came up with those two tubes... now you have me questioning my choice about the Voshkods, lol. 
 
The 6N30P-DR is definitely out of my price range, especially considering I only paid $160 for the MKIII, I don't want to pay $120 for tubes. Any suggestions for 6N6P-IR brand of tubes? 
 
EDIT: I am assuming these? http://www.ebay.com/itm/2-x-6N6P-IR-Russian-dual-triode-NOS-/161083192192?pt=LH_DefaultDomain_0&hash=item25814e7380 . Seems like a good deal to me, pretty cheap. Also, what about NOVOSIBIRSK 6N6P GOLD GRID, I read that they might sound "better" than the 6N6P-i's?
 
As far as driver and power tubes go, bass is important to me, since I am a BASSHEAD, but more important is trying to deal with sillibance. Just an FYI :)
 
Aug 17, 2013 at 12:03 PM Post #2,437 of 13,432
Quote:

 
the GE 6ce5/6bc6, not the best sounding tube i have, but it sure does glow !

The 6EW6 glow pretty bright too and sound really nice with the 2-7 strap.
 
Aug 17, 2013 at 12:16 PM Post #2,438 of 13,432
Quote:
The 6EW6 glow pretty bright too and sound really nice with the 2-7 strap.

To be honest, I kind of want to stick to tubes that I just just plug in, with no modification. That's why I made sure I was purchasing a rev.2 board as well. I might look into this down the line for sure, but for now I just want to plug in a new one easily and start listening 
smily_headphones1.gif

 
Aug 17, 2013 at 1:05 PM Post #2,439 of 13,432
6BE6 variants then! what i'm running now unstrapped.
 
Aug 17, 2013 at 1:41 PM Post #2,440 of 13,432
Quote:
The 6EW6 glow pretty bright too and sound really nice with the 2-7 strap.


i haven't strapped yet, (said sheepishly) lol
 
Aug 17, 2013 at 1:41 PM Post #2,441 of 13,432
Aug 17, 2013 at 2:05 PM Post #2,443 of 13,432
Quote:
I have found another source for the "foreign" Siemens EH90. These are rebranded tubes, (ZaeriX - Z&I Aero Services LTD, London, England) so no Siemens logo, but they have identical construction, and more importantly, they sound identical to my ears.

 
Actually the tube seems to be Miniwatt-branded (a Philips brand). Zaerix boxes are always full of surprises. 
wink.gif

 
Aug 17, 2013 at 4:24 PM Post #2,444 of 13,432
Quote:
Any particular brand to look at? I'm looking on eBay but theres a bunch, haha.
 
I've been reading around but I don't recall reading about the 6BE6's...

 
Siemens which is seemingly impossible to find now, telefunken and IBM are both good, alternate names are EK90 and 1680.
 
Aug 17, 2013 at 6:30 PM Post #2,445 of 13,432
Hi all,
I have a partial off-topic question, but still related to tubes for LD.
 
As a owner of a LD MK2 unit, I "miss" (aesthetically) the nice brass rings which are fitted on the case at the bottom of the tubes in almost all other MK models (1+, MK3, MK6, MK7, MK8, MK9). Actually it seems ALL MK models have the nice rings, except the MK2 and MK4 (this one has a brass plate). 
frown.gif

 
I'm looking for some of these brass rings on FleaBay or in online tube stores, but unfortunately I'm not able to find anything similar on sale. I found offers for new cases, new sockets, new protection grids, new capacitors ... but no rings 
frown.gif

Has any of you any suggestions ?
 
By the way, can you please also let me know how these rings are attached to your LD cases ? I guess they are glued to it, not screwed, correct ?
Thanks
 

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