[kg4icn]

I turned my Little Dot II++ off to let it cool down so I could swap tubes. Ten minutes later I come back and it is still powered on, so I reach to the back and get shocked!! The power switch had melted and I reached inside it, grounding my hand to the top of the case...

Felt nice- more the burning plastic on my index finger.

 

[Gautama]

Quote:

Originally Posted by kg4icn /img/forum/go_quote.gif I turned my Little Dot II++ off to let it cool down so I could swap tubes. Ten minutes later I come back and it is still powered on, so I reach to the back and get shocked!! The power switch had melted and I reached inside it, grounding my hand to the top of the case... Felt nice- more the burning plastic on my index finger.

Pics of both melted switch and burned finger?

EDIT: To add something to the thread, heres my tube collection

 

[Penchum]

Quote:

Originally Posted by kg4icn /img/forum/go_quote.gif I turned my Little Dot II++ off to let it cool down so I could swap tubes. Ten minutes later I come back and it is still powered on, so I reach to the back and get shocked!! The power switch had melted and I reached inside it, grounding my hand to the top of the case... Felt nice- more the burning plastic on my index finger.

OMG

You ok? Now I know why the new MK series have fuses in the A/C line! I hope your LD II++ is OK? A pic of the switch would be interesting?

 

[Penchum]

Don't put EF91's in your LDII++ like I did. Could be bad for it's health!
And to think I made notes on it too! Jokes on me!

 

[Gautama]

You can put EF91s in a LDII++!?!?!
I thought it was EF92 equiv's only!

 

[Dept_of_Alchemy]

Quote:

Originally Posted by Gautama /img/forum/go_quote.gif You can put EF91s in a LDII++!?!?! I thought it was EF92 equiv's only!

It isn't safe you guys. The EF91 draws quite a bit more current than the EF92, this will force the voltage regulators to work harder and run hotter, given the LDII++ has a reputation for failing VR's running it harder is probably a bad idea.

 

[Penchum]

Quote:

Originally Posted by Dept_of_Alchemy /img/forum/go_quote.gif It isn't safe you guys. The EF91 draws quite a bit more current than the EF92, this will force the voltage regulators to work harder and run hotter, given the LDII++ has a reputation for failing VR's running it harder is probably a bad idea.

Is that right!!

I didn't notice anything different, but I sure don't want to "cook" it either. I had my old note sheet on possibilities for the LDII++ and I had written it down there, so I never gave it a second thought! Sorry for the mis-direct, I'll go clean up my post.

 

[Penchum]

On a side note, it really did sound at that level in the MKII also. Right between the M8161 and 6CQ6. They matured pretty quick too. I guess I'll have a set for when my MKIII gets here.

 

[Dept_of_Alchemy]

You're getting a MkIII too? Quite the collector!

 

[Penchum]

Quote:

Originally Posted by Dept_of_Alchemy /img/forum/go_quote.gif You're getting a MkIII too? Quite the collector!

I've been wanting one of those for a while. I guess it was back when they put the first pics of it up on their site. Those big Rubycons just sucked me in!

 

[vcoheda]

Quote:

Originally Posted by kg4icn /img/forum/go_quote.gif I turned my Little Dot II++ off to let it cool down so I could swap tubes. Ten minutes later I come back and it is still powered on, so I reach to the back and get shocked!! The power switch had melted and I reached inside it, grounding my hand to the top of the case... Felt nice- more the burning plastic on my index finger.

long term effects of the heat. never imagined it would be something like that.

so is the amp done for?

 

[Gautama]

Quote:

Originally Posted by Penchum /img/forum/go_quote.gif On a side note, it really did sound at that level in the MKII also. Right between the M8161 and 6CQ6. They matured pretty quick too. I guess I'll have a set for when my MKIII gets here.

Can you elaborate about the sound of the 6CQ6?
Quote:

Originally Posted by vcoheda /img/forum/go_quote.gif long term effects of the heat. never imagined it would be something like that. so is the amp done for?

Look at the bright side, he may get a free upgrade to MKII

 

[vcoheda]

yeah. contact little dot. repairs are guaranteed for a year after purchase, which i doubt they will even bother with. for a small sum, you could probably get a new amp - updated model as well.

 

[Penchum]

Quote:

Originally Posted by Gautama /img/forum/go_quote.gif Can you elaborate about the sound of the 6CQ6? Look at the bright side, he may get a free upgrade to MKII

I think your description on the page before this one is very close. To me, there was a difference in the highs, that sounds like there might be a difference is the speed of attack and decay, which makes the high notes seem shorter in duration. I like the sound of both very much. The shield versions seem (for some reason) to be better.

 

[Gautama]

Those with the mullard shield are older, those with double lined mullard shields are even older than that!