Little Dot Tube Amps: Vacuum Tube Rolling Guide
Sep 9, 2016 at 1:22 PM Post #10,366 of 13,448
I received my 6hm5 yesterday and one tube has this bright dot and no sound from that one, I tried switch side and made opposite channel not work. The other tube is fine glows orange like my other tubes. Seller is fantastic and will send me replacement. Anybody knows what this is? See picture. Put back the 6j1p-ev and no problem. It's set to EF95 so should be fine. Again one tube works perfectly.

 
Sep 10, 2016 at 12:07 PM Post #10,369 of 13,448
It would appear that this is the very first Little Dot, introduced in 2004. From the chart linked to below, it uses 2P3 for output and 1B2 for drivers. I have never seen this amp and consequently have no experience with it.
 
http://www.head-fi.org/t/355789/list-of-little-dot-amps#post_4638237
 
Sep 11, 2016 at 8:57 AM Post #10,371 of 13,448
  It would appear that this is the very first Little Dot, introduced in 2004. From the chart linked to below, it uses 2P3 for output and 1B2 for drivers. I have never seen this amp and consequently have no experience with it.
 
http://www.head-fi.org/t/355789/list-of-little-dot-amps#post_4638237

Thank you so much for the link. This is really helpful. :)
 
Sep 13, 2016 at 7:32 AM Post #10,373 of 13,448
http://www.ebay.com/itm/2x-Matched-1957-Tesla-6F32-D-getter-vacuum-tubes-EF95-6AK5/112052765296?_trksid=p2047675.c100009.m1982&_trkparms=aid%3D888007%26algo%3DDISC.MBE%26ao%3D1%26asc%3D38530%26meid%3Dcdb41a85e1c14c0fa26398e4bd65f75a%26pid%3D100009%26rk%3D1%26rkt%3D1%26sd%3D252230073367
 
I chanced upon the discussion relating to two types of these Tesla's; the one with the white hat and white lettering supposed to be the best. Any opinions as to whether the above are just mixed or worth the try?
 
Sep 13, 2016 at 7:39 AM Post #10,374 of 13,448
http://www.ebay.com/itm/2x-Matched-Voskhod-Gold-pins-Gold-grid-6ZH1P-EV-6AK5-EF95-403B-5654-6J1-1977-NIB/131446387039?_trksid=p2047675.c100009.m1982&_trkparms=aid%3D888007%26algo%3DDISC.MBE%26ao%3D1%26asc%3D20131227121020%26meid%3D6667defeb05742c8a7ba84595932fa43%26pid%3D100009%26rk%3D2%26rkt%3D2%26sd%3D112052765296
 
likewise: I seem to recall reading here that the so-called gold pins was not original but an aftre-maket job. I have a pair of these (non gold pinned) from 81". These are earlier. Any difference in sound? I was not entirely convinced, especially after finding the Tung Sol's. The hunt goes on!
 
Sep 15, 2016 at 5:30 AM Post #10,375 of 13,448
  http://www.ebay.com/itm/2x-Matched-Voskhod-Gold-pins-Gold-grid-6ZH1P-EV-6AK5-EF95-403B-5654-6J1-1977-NIB/131446387039?_trksid=p2047675.c100009.m1982&_trkparms=aid%3D888007%26algo%3DDISC.MBE%26ao%3D1%26asc%3D20131227121020%26meid%3D6667defeb05742c8a7ba84595932fa43%26pid%3D100009%26rk%3D2%26rkt%3D2%26sd%3D112052765296
 
likewise: I seem to recall reading here that the so-called gold pins was not original but an aftre-maket job. I have a pair of these (non gold pinned) from 81". These are earlier. Any difference in sound? I was not entirely convinced, especially after finding the Tung Sol's. The hunt goes on!

 
The gold shouldn't really affect the sound per se, it's just a matter of connection. 
 
Sep 15, 2016 at 9:50 AM Post #10,376 of 13,448
   
The gold shouldn't really affect the sound per se, it's just a matter of connection. 


He didn't mean that the gold pins would change the sound.
The gold or non gold pins sometimes define different manufacturers, tube vintage or internal design which does impact the sound.
 
Sep 15, 2016 at 6:01 PM Post #10,377 of 13,448
"The first grid is wound with wire made of an alloy of gold and platinum." I was wondering more about this than the pins. The first set of these tubes I bought made no mention of either gold or platinum. These appear to be from a few years earlier. Having no luck finding the Tung Sols, I have turned my attention elsewhere and ordered a pair of Tesla vintage 57' A bit pricey but I found only one seller on the net. I'll report back on these when I get them. (I never thought I would catch the tube rolling bug!!!)
 
Sep 20, 2016 at 11:22 AM Post #10,379 of 13,448
Just received these but i researched first and I need to either use a jumper on pin 2 and 7 or I can get adapter. I think adapter is easier. I didn't find links for adapter, does anyone knows what adapter I need? Im in a small town so it's easier to order stuff online. I don't mind spend a little to get 2 adapters vs buying wires and cut and risk mistake.

 
Sep 20, 2016 at 12:31 PM Post #10,380 of 13,448
Just received these but i researched first and I need to either use a jumper on pin 2 and 7 or I can get adapter. I think adapter is easier. I didn't find links for adapter, does anyone knows what adapter I need? Im in a small town so it's easier to order stuff online. I don't mind spend a little to get 2 adapters vs buying wires and cut and risk mistake.



I doubt you will find a commercially made 6AH6 to EF95 adapter.
You will probably have to DIY one or just use the straps like we all did when we were testing out those tubes.

I soldered permanent straps on my Tungsol 6AH6WA's.

 

 

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