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Little Dot Tube Amps: Vacuum Tube Rolling Guide - Page 299

post #4471 of 10502
Quote:
Originally Posted by sam6350 View Post
 

I'm using a Littledot MkIII amp, so I'm assuming that these tubes will be ok for that amp?


Also, I'm assuming that these are what you're referring to Mordy?

http://www.ebay.ca/itm/6HM5-6HA5-EC900-export-quality-audio-triode-tube-NOS-FREE-SHIPPING-/300879467071?pt=Vintage_Electronics_R2&hash=item460dd0523f

 

Yes, those 6HM5s are the right tubes, made in Yugoslavia. And yes, they will work great in your LDIII. Just set your amp to use EF95 tubes and you are good to go. As I use an LD 1+, I can't comment on the 6N6P....

post #4472 of 10502

Thank you again guys,

 

Just as an update, I called the postal service again and now they're telling me that it wasn't rejected and sent back... which makes me think that someone in the bureaucracy made a mistake. I'll know for certain on Friday as to what the heck is going on. If the Tubes I already ordered are on their way, then I'm obliged to pay for them (obviously).

 

Regardless, I may just order the tubes you guys have recommended anyway, and then start doing my own comparisons.

Merry Christmas, and once again, thanks alot.

 

All the best,

 

Sam

post #4473 of 10502

Merry Christmas everybody !                                                                                                                                    


Edited by MIKELAP - 12/25/13 at 4:09pm
post #4474 of 10502

He will accept $5 but not $4 on the Yugo tube (even for a large number).

post #4475 of 10502
Quote:
Originally Posted by Ctritical Bill View Post

 

                           Heater         Plate         Cathode

 

Westinghouse  (L) 6.38v           147.8v         1.052v

                     (R)                   147.1v         1.067v

Russian NOS    (L) 6.36v           151.7v         0.991v

                     (R)                   153.7v         0.950v

Sylvania          (L)  6.38v          150.6v         1.028v

                     (R)                   152.7v         0.982v

 

 

I made some measurements with a Tung-Sol 6SU7GTY and a Sylvania "Chrome Top" 6SL7WGT  in an LD 1+:

 

DC heater set at 6.3:


                           Plate                   Cathode/Grid

 

 Tung Sol              R  104.6                    1.1
                            L  104.7                    1.1

 

Tung Sol (Click to show)
LL


Sylvania                R  105.1                     1.0
                            L  105.1                      1.1

 

Sylvania (Click to show)
$(KGrHqNHJBMFJG!bYkoIBSUzecl,B!~~60_57.JPG

 

While the cathode/grid values are very similar to yours, it is interesting that the plate values are significantly lower. Perhaps because the tube stage in the LD 1+ is configured as a cathode follower rather than a "driver"?

post #4476 of 10502

I received a Raytheon 6CG7 this morning, made in the US, with black plates. Searching Google, the Raytheon (US made, not Japan) seems to have a very good reputation. The 6CG7 is electrically identical to the 6SN7, (and most importantly to those of with LDs, it requires 600ma, so an external heater is advisable), but it is pin-compatible with the 6DJ8.

 

Took some measurements

 

DC heater voltage set to 6.3, but read 6.16 at the socket

 

          Plate           Grid/Cathode

R          82.8                 3.1

L          82.8                 3.1

 

Not surprisingly, roughly the same readings as a 6SN7.

 

$_57.JPG 

post #4477 of 10502

merry christmas,hi i would like to know if all the tubes that are listed in page 77 and all the current tubes that you guys are rolling will  work with LD 1+?THANKS

post #4478 of 10502
Quote:
Originally Posted by i luvmusic 2 View Post
 

merry christmas,hi i would like to know if all the tubes that are listed in page 77 and all the current tubes that you guys are rolling will  work with LD 1+?THANKS

 

Yes, I have an LD 1+ and I am pretty sure I have used every one of these tubes. :)

 

Cheers

post #4479 of 10502

Ive been waiting so long for my 6SL7 OCTAL to 12AX7 adapters  still not here after 5 weeks so started to do an adapter for 6SL7 octals only, do any of you guys know if some of these  6SL7 to 12ax7 adapters are made and sold in the U.S. . Thanks


Edited by MIKELAP - 12/26/13 at 4:45pm
post #4480 of 10502
Quote:
Originally Posted by gibosi View Post
 

 

Yes, I have an LD 1+ and I am pretty sure I have used every one of these tubes. :)

 

Cheers

THANK YOU! and do you have any recomendations for the OP amp?

post #4481 of 10502
Quote:
Originally Posted by i luvmusic 2 View Post
 

THANK YOU! and do you have any recomendations for the OP amp?

 

The best op amp I have found so far is the MUSES 02.

post #4482 of 10502
Quote:
Originally Posted by MIKELAP View Post
 

Ive been waiting so long for my 6SL7 OCTAL to 12AX7 adapters  still not here after 5 weeks so started to do an adapter for 6SL7 octals only, do any of you guys know if some of these  6SL7 to 12ax7 adapters are made and sold in the U.S. . Thanks

 

I haven't been able to find one made in North America, only China or HK. That said, 5 weeks seems a very, very long time..... 

post #4483 of 10502
Quote:
Originally Posted by MIKELAP View Post
 

Ive been waiting so long for my 6SL7 OCTAL to 12AX7 adapters  still not here after 5 weeks so started to do an adapter for 6SL7 octals only, do any of you guys know if some of these  6SL7 to 12ax7 adapters are made and sold in the U.S. . Thanks

Orlando FLA... $25 each and $9.95 shipping to Canada Eh?

They can also make you what you want if you contact them.

 

This will allow you to plug your 6SL7 into your 6DJ8 adapter, 6SN7=6SL7 & 6CG7=6DJ8 as far as pinouts are concerned.

This adapter will NOT work in your 12AX7 adapter. :D 


Edited by TrollDragon - 12/26/13 at 8:16pm
post #4484 of 10502

HI TD,

 

 

I have an octal to 12AX7 adapter which is plugged into a 9 pin socket on a breadboard which is wired to play 12AX7 tubes via two Vector adapters. With this adapter I play 6SL7 tubes. Are you saying I that I cannot use this set up for 6SN7 tubes? (I realize that the 6SN7 tubes need a separate power supply for the heaters).

post #4485 of 10502
Quote:
Originally Posted by mordy View Post

 

I have an octal to 12AX7 adapter which is plugged into a 9 pin socket on a breadboard which is wired to play 12AX7 tubes via two Vector adapters. With this adapter I play 6SL7 tubes. Are you saying I that I cannot use this set up for 6SN7 tubes? (I realize that the 6SN7 tubes need a separate power supply for the heaters).

 

You can continue to use your current arrangement for both 6SL7 and 6SN7 tubes. They have the exact same pin out. Similarly, I configure my 9-pin socket for 12AX7 tubes and use a Chinese adapter to run Octals. However, the adapter TrollDragon found will allow one to run 6SL7 and 6SN7 tubes in a 6DJ8 socket! For me, this would be much better. The ONLY reason I configure my socket for 12AX7 is to run Octals. If I never had to change from the 6DJ8 configuration again, that would be great. :)


Edited by gibosi - 12/26/13 at 8:51pm
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