A single stage amp ?

If they glow, this is the place to be
User avatar
rowuk
Old Hand
Posts: 453
Joined: Sun Jun 01, 2014 2:50 pm
Location: Germany

#31 Here are 2 examples of single stage in the same amplifier

Post by rowuk »

Romy uses 2 single stage amps with his DSET concept in the fundamentals and HF channels:

Image[/img]
Whenever I feel blue, I start breathing again.
User avatar
pre65
Amstrad Tower of Power
Posts: 21373
Joined: Wed Aug 22, 2007 11:13 pm
Location: North Essex/Suffolk border.

#32

Post by pre65 »

This might be a dumb question, but how can you have 1/2 a 6C33C ?

As I read things the anode, cathode and grid are internally connected, with just separate heater supplies for each half. :?

http://www.jogis-roehrenbude.de/Russian ... heetMB.pdf
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
User avatar
Nick
Site Admin
Posts: 15706
Joined: Sun May 06, 2007 10:20 am
Location: West Yorkshire

#33

Post by Nick »

pre65 wrote:This might be a dumb question, but how can you have 1/2 a 6C33C ?

As I read things the anode, cathode and grid are internally connected, with just separate heater supplies for each half. :?

http://www.jogis-roehrenbude.de/Russian ... heetMB.pdf
Just heat one half?

There is a seven pin triode from Russia that is in effect half a 6c33c, I used it in the regulator for the first LCR phono I built, can't remember the number at the moment.
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
User avatar
pre65
Amstrad Tower of Power
Posts: 21373
Joined: Wed Aug 22, 2007 11:13 pm
Location: North Essex/Suffolk border.

#34

Post by pre65 »

Nick wrote: Just heat one half?
Simples. :lol:
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
Alex Kitic
Old Hand
Posts: 369
Joined: Mon Oct 14, 2013 3:20 pm

#35

Post by Alex Kitic »

Not only you can use one half of 6C33C (babuška) - preferably heating just one cathode (eventually swapping tubes between channels when they start getting weak) - but you can apply higher B+ and use the tube with a different set of parameters, essentially plotting the loadline in a different part of the curves.

This gives it a different character and sound. After my initial suggestions, some have applied the concept and regardless of the lower power liked the approach more.

I prefer 6AS7/6080 and 6336.
User avatar
rowuk
Old Hand
Posts: 453
Joined: Sun Jun 01, 2014 2:50 pm
Location: Germany

#36 Some tubes are feminine..

Post by rowuk »

Image
With the nipples at the top, it is more like mamuška
Alex Kitic wrote:Not only you can use one half of 6C33C (babuška) -
Whenever I feel blue, I start breathing again.
User avatar
Dave the bass
Amstrad Tower of Power
Posts: 12273
Joined: Tue May 22, 2007 4:36 pm
Location: NW Kent, Darn Sarf innit.

#37

Post by Dave the bass »

Woaaarrrr! "Triple-Nipples"!
"The fat bourgeois and his doppelganger"
Romy The Cat
User
Posts: 86
Joined: Tue Jan 28, 2014 10:23 pm
Location: Boston, MA
Contact:

#38

Post by Romy The Cat »

Alex Kitic wrote: but you can apply higher B+ and use the tube with a different set of parameters, essentially plotting the loadline in a different part of the curves.

Well, it is of cause highly predictable if the objective is to masturbate with different tubes, placing with measuring equipment, stupid conversations about different part of the curves for IDHT, desire to share with other online how you were abused by an electrician in your childhood and endless suffocating in soldering smoke. There is no different part of the curves for IDHT and there is no higher B+, there is just no need for it in real life where objective is to make amp that gets the best from the given tube/topology and forget about it. If the objectives is the keep annoying yourself and another with endless, pointless and incredibly stupid experimentation with electrical application then for sure one can run any tube at any voltage and then waste 2344564 posts elaborating how wonderful was it.
Romy The Cat
User
Posts: 86
Joined: Tue Jan 28, 2014 10:23 pm
Location: Boston, MA
Contact:

#39

Post by Romy The Cat »

Nick wrote: There is a seven pin triode from Russia that is in effect half a 6c33c, I used it in the regulator for the first LCR phono I built, can't remember the number at the moment.
The triode you mean is 6C41C that is "kind" of half of 6c33c, however it has very bad sound, not even remotely close to 6c33c.
User avatar
pre65
Amstrad Tower of Power
Posts: 21373
Joined: Wed Aug 22, 2007 11:13 pm
Location: North Essex/Suffolk border.

#40

Post by pre65 »

Romy The Cat wrote:
Nick wrote: There is a seven pin triode from Russia that is in effect half a 6c33c, I used it in the regulator for the first LCR phono I built, can't remember the number at the moment.
The triode you mean is 6C41C that is "kind" of half of 6c33c, however it has very bad sound, not even remotely close to 6c33c.
Not heard one myself, but I read of an OTL amp using that valve and the review was very positive.
The only thing necessary for the triumph of evil is for good men to do nothing.

Edmund Burke

G-Popz THE easy listening connoisseur. (Philip)
User avatar
rowuk
Old Hand
Posts: 453
Joined: Sun Jun 01, 2014 2:50 pm
Location: Germany

#41 There is a place where all this stuff can be found.......

Post by rowuk »

http://www.goodsoundclub.com/Forums/Sho ... =6140#6140

I think that the 6C18C is what you are talking about
Whenever I feel blue, I start breathing again.
User avatar
shane
Social outcast
Posts: 3403
Joined: Sun Sep 16, 2007 12:09 pm
Location: Kept in a cool dry place.

#42

Post by shane »

Romy The Cat wrote:
Well, it is of cause highly predictable if the objective is to masturbate with different tubes.
You'd need to be a bit cautious. Wouldn't want to break any valuable glass.....
The world looks so different after learning science. For example, trees are made of air, primarily. When they are burned, they go back to air, and in their flaming heat is released the flaming heat of the Sun which was bound in to convert air into tree.
Romy The Cat
User
Posts: 86
Joined: Tue Jan 28, 2014 10:23 pm
Location: Boston, MA
Contact:

#43 Re: There is a place where all this stuff can be found......

Post by Romy The Cat »

rowuk wrote:http://www.goodsoundclub.com/Forums/Sho ... =6140#6140

I think that the 6C18C is what you are talking about
It is incorrect. The 6C18C is the same two plates as 6C33C and they are direct replacement. In the image you linked there are two 6C18C on the left, they are without the nipples. The 6C41C is smaller tube and in the first image on the following thread two right tubes (smaller) are 6C41C

http://www.goodsoundclub.com/Forums/Sho ... =1349#1349

Me
User avatar
Nick
Site Admin
Posts: 15706
Joined: Sun May 06, 2007 10:20 am
Location: West Yorkshire

#44

Post by Nick »

Yep, it was the 6C41C I was thinking of.
Whenever an honest man discovers that he's mistaken, he will either cease to be mistaken or he will cease to be honest.
Post Reply