What to do with C3g tubes

[adalin]

So I got a large amount of C3g tubes and Im looking for projects that fits this tube perfectly

So what can you really do with these tubes?

They are really great tubes, the curves look beautiful and the build quality is superb

I feel bad to let them waste away on a shelf

so enlighten me!

 

[el156]

Well, you can send 4 of those for me , i never had one of those, and could include them in my next project

 

[euro21]

So what can you really do with these tubes?

1.) Phono
http://www.diyaudio.com/forums/tube...trapped-linearity-question-9.html#post3719376

2.) First tube of two stage SE amplifier (triode strapped, 18mA CCS, two infra LED bias).

 

[azazello]

So I got a large amount of C3g tubes and Im looking for projects that fits this tube perfectly

So what can you really do with these tubes?

They are really great tubes, the curves look beautiful and the build quality is superb

I feel bad to let them waste away on a shelf

so enlighten me!

IMO, triode mode for preamplifier with great sound /for 2A3, 6S4S, 6AS7, 1625/... +Uplate = 200 V,...Iplate = 17 ma,...-Ugride = -3 v,....Rcathode = 180 ohm.

 

[tinitus]

how about C3g driving a mosfet split load phase splitter, into a El84 PP ?

is that 'almost' 2-stage ?

 

[toriversen]

c3g tube

Hi,

Dont waste them, I'll buy them all if you don't want them.
they where built specifically for the German post, they are special quality - 10,000 hour pentodes for use in AF and RF circuits. This is a very good preamp/riaa tube if you want minimum noise, best if you use them in triode mode. They where, when produced, not for sale to the general public.

Again, if you want to sell some, please contact me.

For more info see attached pdf.

 

[adalin]

Well yes I am very aware of what kind of tubes they are and how excellent they indeed are in many ways.

the question is what to build with them.

 

[lordoff]

OK, my best expensive option: Phono End

 

[multi]

Why only as a triode?
Surely they would be an excellent driver for 2A3's or even 300B's as a pentode.
Or even as a Phono stage!!
Phil

 

[Stixx]

Headphone amplifiers...!

The first one is OTL and was just sold to someone in the UK, the second one is transformer coupled. Absolutely splendid tube!

 

[euro21]

Why only as a triode?

Triode mode Ri: 2.3k;
as pentode : 300k!

 

[Hilmar53]

Line-amp with Lundahl 1660 4:1 Output and TVC as Input.
In Triode-mode because "euro21" is right - in Pentode Ri is way to high.
Sound is fantastic.
For optical reasons you can cut with a sharp knife or a very fine saw the alu-case and you will see the nice glow of the heaters.

Hilmar

 

[Stixx]

For optical reasons you can cut with a sharp knife or a very fine saw the alu-case and you will see the nice glow of the heaters.

Although I think those aluminum caps were there for a reason... to my ears C3G's sound better when properly warm.

 

[Ryssen]

I use them to drive the 6B4G in a Monkey amp (direct drive).
They sound great!

Edit: I use them without the metal can..

 

[toriversen]

C3g Use

Hi again,

C3g can be used as a preamp/riaa tube,examples/schematics are to be found here:

http://www.diyaudio.com/forums/analogue-source/241042-hasimoto-c3g-phono-preamp.html

DIY Audio Projects Forum • C3G HIFI-PREAMP


it can also be used as an input or driver tube in a power amp driving a 2a3 or 300b SE amp, or almost anything else, examples to be found here:

Index of /SCHEMATICS/BY-TUBES/C3g

Audio Asylum Thread Printer

http://tubeschematics.blogspot.no/2013/02/se-da41-c3g-c3g-el34-amplifier.html

There are many other schematics to be found using a simple google search

Hope these links can give you some ideas on what to do with your tubes.

 

[adalin]

Yeah I was thinking about building a preamp of some kind

I dont need a Phono-preamp though

But maybe a single C3g with CCS would do the trick and maybe Ill buy a couple of lundahl 1660 to do some experiments with.

If you cut away the metal around the C3g it glows in a wonderful way

this one is mounted in a octal base

But I need more things to do with them

 

[RajkoM]

These are beautiful triple-mica C3g.
It is hard to find them. Take care of it.

Best diying-

 

[toriversen]

C3g use

What about an headphone amp ? See:

Kopfhoerer-Amp_C3g, von Oliver Stick

Kopfhörerverstärker mit C3g, von Heinrich Siemens



Regards

Tor

 

[tinitus]

But maybe a single C3g with CCS ...

I thought ccs would not work with a pentode (because a pentode itself works like a ccs ?)

but maybe its different when triode wired ?

 

[toriversen]

C3g CCS

Yes I agree, it would be like a series coupling of two ccs's, but there are always someone who has tried it, Gary Pimm has done some testing of this, see:

http://www.pimmlabs.com/web/drivers.htm

and:

4P1L Pentode Driver (Test 2) | Bartola Valves