C3G case removal - preamp tube

Haven't a clue, never had the need or opportunity.

Pics of the guts when you've managed.

Oooooo, they look cool!

They certainly are that.

Thick glass, gold grids/pins and none of the usual tooling scratches/scorches or marks on the plates.

Still trying to get the new ruddy ones open though!

Hi, yes they are the exact ones being discussed in the thread but unless I'm missing a vital part of the puzzle, removal is a lot easier said than done....

The term "peel" implies you have to make some kind of incision (which is certainly viable with thin aluminium) so it may be a case of making a hole and going for it!

Aside from their difficulty to access, the more I read about them the more I realise why they sound as good as they do.

A few years ago an amp builder told me they were simply the best preamp tubes ever made, I thought he was just bigging up his own design (it was a 300B amp using c3m's as preamp tubes). Seems he had reason to wax lyrical though.

As mentioned I have the C3G's in combination with a TDA1541 DAC and musicality is off the scale. Never seen a DAC with this combination before either.

I'd be inclined to try sharp pointed scissors and try cutting it if you can get the tip into that lip you mention.

Yeah..... I'm gonna have to hack into the sucka I reckon!!

Good result.

Well they sound pretty much the same as the tubes which were in there before (which is a good thing!) but I just wanted to bag a 'spare' set before prices creep up or availability dies out . . . 

Sp far the only difference I can detect between the 'Lorenz' and 'Siemens' tubes is that the 'Lorenz' are a little more spacious but lose out a tad to the 'Siemens' in the bass department. Although they are very very close in all aspects. Of course they may get even closer in performance once they are properly burned in as they onlt have 20 hours on them or so. With a life-span of 10,000 hours+ they probably have quite a slow burn in I'd imagine!

They should see me out with a life span like that . . . and I'm still in me 30's!

Cheers

I was actually looking for it, is it past the bingo hall and up the stannah stair lift?....😉

I seem to have alienated most of my own generational peers, possibly by talking aggressively about hifi at them....

Their loss I say....

Bah! Whippersnappers !

my oppo at work was born in 1990. I could never get my head around that. Outside of work it made for a difficult relationship. She'd never heard of anything that was familiar to me and I'd never heard of anything that was familiar to her.

I think the internet becoming ubiquitous is the big divider. That and Harry Potter.

Hi Paul,

they replaced some identical (model) C3G's. I had some Lorenz branded ones and these Siemens. Overall I think the Siemens were better but I sold the DAC shortly afterwards so can't really talk about them long term!

The DAC was designed to work with C3G model only but I believe C3M (popular driver in 300b amps etc) would probably have worked although they do differ slightly in heater current and plate voltage I believe so would be worth checking.

All the C3M and C3G valves I've heard have always been really good actually. It seems the design and manufacture of most of them (thick glass, hefty pins etc) is more responsible for their quality sound than the difference between brands, unlike some valve models.

However if I got some again it would likely be Siemens as I trust them.