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Little Dot Tube Amps: Vacuum Tube Rolling Guide
Aug 17, 2013 at 6:43 PM Post #2,446 of 13,432
Quote:
mab1376 said:
 
Siemens which is seemingly impossible to find now, telefunken and IBM are both good, alternate names are EK90 and 1680.
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I can't seem to find Siemens or Telefunken's on eBay... just so i'm straight, these power tubes require no modification, just plug-and-play, correct?
 
Are they really that much better than 6N6P-IR, or 6H30Pi's? 
 
I've been looking at http://www.ebay.com/itm/161083192192?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649, in comparison to the EH's and the 6H6P-I's. 1983 so they should still be good quality, I think.
 
Aug 17, 2013 at 6:53 PM Post #2,447 of 13,432
Quote:
frankie90 said:
I can't seem to find Siemens or Telefunken's on eBay... just so i'm straight, these power tubes require no modification, just plug-and-play, correct?
 
Are they really that much better than 6N6P-IR, or 6H30Pi's? 
 
I've been looking at http://www.ebay.com/itm/161083192192?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649, in comparison to the EH's and the 6H6P-I's. 1983 so they should still be good quality, I think.
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I think mab was referring to driver tubes, not power tubes (the EK90 is a driver tube).
 
Aug 17, 2013 at 7:26 PM Post #2,449 of 13,432
Got my Valvo EH90's today... got a little hum but that should go away with time. I also noticed the hum gets worse if I touch the tube when its on...

 

My favorite Voskhod 6ZH1P-EV net to the new guy Valvo EH90
 
Aug 17, 2013 at 7:40 PM Post #2,450 of 13,432
Quote:
vic2vic said:
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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Try looking in hardware store for spacers  and they are not brass by the way  actually those rings are stainless steel and when heated by the tubes  turn yellowish a bit but if you want brass and you cant find spacers with the right sizes you can always go to a Machine Shop and have them turned 4 pieces on a lathe  use little silicon to glue them so they stay in place or just slip them on . Personnally i liked the little cages around the tubes so i made these with a hand drill and a dremel to cut the post the right lenght it was a pain to do but i like them 
 
 

 
Aug 17, 2013 at 7:51 PM Post #2,452 of 13,432
Quote:
kvtaco17 said:
Got my Valvo EH90's today... got a little hum but that should go away with time. I also noticed the hum gets worse if I touch the tube when its on...

 

My favorite Voskhod 6ZH1P-EV net to the new guy Valvo EH90
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Did you clean the pins before you put the tubes in sometimes it helps 
 
Aug 17, 2013 at 7:59 PM Post #2,455 of 13,432
Aug 17, 2013 at 8:12 PM Post #2,456 of 13,432
Quote:
edgard varese said:
I've got a Little Dot I+ so no power tubes to deal with.  All my headphones are low impedence (Grado & Alessandro), which don't match as well with the Mk III.
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i'm a grado/alessandro guy,
ms2, and ps500
 
Aug 17, 2013 at 8:16 PM Post #2,457 of 13,432
I also saw...
 
GE1
B4k1
 
GE1
B4L2
 
printed in shiny grey on them dates maybe?
 
and proof of clean pins...
 

 
Aug 17, 2013 at 8:35 PM Post #2,459 of 13,432
Quote:
edgard varese said:
MS1 and SR60 here, auditioning the RS1i, hopefully this week if the dealer can get them in for me.  
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you're lucky to have a dealer close by, i just have to take a chance, but, i haven't had a bad grado yet !!
 
Aug 17, 2013 at 9:23 PM Post #2,460 of 13,432
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