Little Dot Tube Amps: Vacuum Tube Rolling Guide
Oct 14, 2017 at 5:44 PM Post #11,221 of 12,956

DylanF

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Almost ruin my LD3 just now... I bought a pair of 6SN7 tubes that I wanted to try, but I got the wrong adapter 6SN7 -> 12AX7. The transformer got really hot as if I have had it on for like an hour, but fortunately I turned it off quickly. I switched back to the stock tubes after the unit cools down and tested it. I think the amp survived stupidity this time...

Anyway, I just wanted to post this experience here so folks will now steer clear of the wrong type of adapter.
And the right adapter is? 6SN7 to ? Thanks ! Dylan
 
Oct 14, 2017 at 6:25 PM Post #11,222 of 12,956

MIKELAP

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Oct 14, 2017 at 10:32 PM Post #11,224 of 12,956

gibosi

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Or ECC88 (not sure if they are equivalent to 6CG7), which is what I ended up buying.

Both the ECC88 and 6CG7 have the same pinout as the 6H30 so an adapter with 6SN7 on top and any of these tubes on the bottom will work. But otherwise, they are not equivalent. The ECC88 is a premium version of the 6DJ8 and the 6CG7 is a 9-pin version of the 6SN7.
 
Oct 17, 2017 at 2:29 PM Post #11,225 of 12,956

DylanF

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I want to thank all those answers everyone has provided on these easy (albeit a bit expensive) upgrades to my LDMKII. I've had my MKII for a few years and use it daily. It deserves an upgrade. I've got the tubes/adapters on the way! Thanks, Dylan

(what I meant by easy, is that no soldering is required...)
 
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Oct 21, 2017 at 2:15 PM Post #11,226 of 12,956

Hitogoroshichan

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Has anyone ever tried using a 6n6p as a driver tube for their LD? I've seen schematics for other amps use them as preamp tubes so I was wondering if they'll work in my LD since they have the same pin out as all the other 6.3v 9 pin double triodes that I've tried and I use an external heater supply so the .9A heater current isn't a problem. I would have just tried them myself instead of asking here but I wasn't sure whether there was a reason I'd never seen anyone using them this way or not.
 
Oct 22, 2017 at 1:51 AM Post #11,231 of 12,956

rexhu100

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Yes C3g,6SN7,6HM5,12@#7 but none can push the Bass the amp just can't do it.

I think the RCA driver tubes have just the right amount of bass for my HD 600. That being said, I never heard the HD 700. Can these cans achieve good bass for you on other amps?
 
Oct 22, 2017 at 9:21 AM Post #11,232 of 12,956

i luvmusic 2

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Yes specially with my DIY amp,with all the amp that i have only the MK III have the thinnest sound the treble is nice tho.

IMG_0871.JPG
IMG_0873.JPG
 
Oct 22, 2017 at 7:54 PM Post #11,234 of 12,956

dobigstuff

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Yes C3g,6SN7,6HM5,12@#7 but none can push the Bass the amp just can't do it.
i luvmusic 2:
Here is my setup and I have the HD 700's. Plenty of Bass and Power.
9933245_m.jpg
 

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