[DylanF]

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

 

[MIKELAP]

And the right adapter is? 6SN7 to ? Thanks ! Dylan

6sn7 to 6cg7 http://www.ebay.com/itm/1piece-gold...e=STRK:MEBIDX:IT&_trksid=p2055119.m1438.l2649

 

[rexhu100]

And the right adapter is? 6SN7 to ? Thanks ! Dylan

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

 

[gibosi]

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.

 

[DylanF]

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...)

 

[Hitogoroshichan]

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.

 

[gibosi]

I tried one as a driver on my LD 1+ and it worked fine.

 

[i luvmusic 2]

If my MK III can only push more BASS and a bit more MIDS into my HD 700 this amp should be perfect for this bright headphone.

 

[rexhu100]

If my MK III can only push more BASS and a bit more MIDS into my HD 700 this amp should be perfect for this bright headphone.

Have you tried RCA 5654 driver tubes? They produce really good bass.

 

[i luvmusic 2]

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

 

[rexhu100]

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?

 

[i luvmusic 2]

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.

 

[DylanF]

Wow, amp porn, nice !

 

[dobigstuff]

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.

 

[i luvmusic 2]

Will the bass is there but nothing compares to my other setup.