6C33

[FullRangeMan]

Dear Knoberik,
Thanks alot for these detailed report. Iam less unlettered now.
This kind of info you told me are very hard to find.
Best regards,
Gustavo

 

[annon2me_99]

I have regulated power supply Oltronix LS135 for anode supply. It has 200mA current limiter (actually limiter kicks in at 220mA), giving up to 400V. My supply enables also regulated negative bias voltage 0...-300V needed for driving the tube. For heater I use separate transformer, from old TV set.
I had used 160V@200mA for brake in, giving 32W dissipation on anode. For measuring purposes I use 0,1 ohm cathode resistor, as I just have those. Therefore 1mV = 10mA. My testing circuit.
It is possible also to use 1 ohm cathode resistor, in this case there will be 1mV = 1mA.

knoberik:

After looking at your test circuit I have a question for you. You show the anode of the tube connected to a +160V source. The Cathode is connected to the 1 ohm current sensing resistor and then to -160V. Is that 360 V total between anode and cathode or just 160 V specified in a manner that I'm not used to seeing.

I guess what I'm asking is, if I put a DC voltmeter across the power supply for this test circuit will I read 160 V or 320 V. I'm a bit confused.

Thank you for your help.

annon2me_99

 

[Wavebourn]

OTK means Quality Check Passed.

Yes, but ОТК В28П means Отдел Технического Контроля Военной Промышленности 28, that means Passed Quality Check of Military Manufacturing, controller number 28. If the tube is bad it is easy to find who was controller number 28 in December 1969, and punish accordingly to his/her sin.

 

[knoberik]

I guess what I'm asking is, if I put a DC voltmeter across the power supply for this test circuit will I read 160 V or 320 V. I'm a bit confused.

As you can see on my schematics, there is no GND marked wire, as this is relevant in given case. I use only 160VDC anode power source, this is enough to get 32-35W on anode with 200-220mA of current. And this power I see capable enough for brake in procedure. There is also an explanation given on schematics where is specifically mentioned: 3. apply anode supply 160V.
Heating is arranged from separate transformer.
Sure you can use different voltages, important is not to overcome the tubes maximum anode dissipation power.

 

[annon2me_99]

Thank you for that help.

annon2m_99

 

[Blaireau]

If it can help, I'm testing a home built 6C33C push-pull amp, and I'm really satisfied with it. Those huge triodes really have a fantastic sound. When driven through an 6n23P SRPP, the full swing can be applied to the grids. Push-pull 6S33S, 6N23P, 6JH8, 6N1P-EV, IN13 By the way, have a look at the phase splitter. Amazing, isn't it? Beam deflection tubes really have fantastic performances, when used as phase splitters. Sorry guys, but the site is not in English yet. (altough it's been planned in a near future...) I'm unsuccesfully trying to find someone who has also tried BDTs, like 6JH8 or 6ME8 in such an application. Has somebody already seen such a design anywhere ? Alain

 

[M Gregg]

Very interesting information,


I wonder how difficult it would be to build a break in circuit into the amp!

Perhaps with a switch to set for controlled break in.
I am just thinking it would be more convenient when replacing tubes.



Regards
M. Gregg

 

[tiefbassuebertr]

Internal Process by 6C33C during dying by overloading - what happens exactly ?

I have heard and read often about this tubes in case of a too short live time. Even by my service on various Graaf GM20 devices I could observe this themselves - go to
http://www.diyaudio.com/forums/tubes-valves/142528-graaf-gm20-mods-help-3.html

The reasons are mostly too high idle currents and/or too high supply voltage (highest value should be not above 90 volts !!!) so as bad quality and various errors/failures while manufacturing like bad vacuum by certainly brands, particulary from China.

But what happens exactly inside of this tube while the failures occurs?
Thank you for an exactly explantation from an expert.

Here an URL Overview arround the 6C33 and 6C33C

Best datasheet, what I know
www.jogis-roehrenbude.de/Russian/6C33C/6C33C-B-6S33S-VExtendedDatasheetMB.pdf

Brand collection and Logos
> Tube Mfg (GLASS ELECTRON TUBE MANUFACTURERS)
KT88 and 6550 Tube Directory (History)
tube_makers.html (The world's tube factories - yesterday and today)
Russian Tube Factories and Logos (old und new Logos from CCCP)

Brands, Basics and History 6C33C - EC33C - 6C33CB - 6S33SV
6C33C (In 1976 a Mig 25 fighter jet landed in Hokkaido in Japan, it was flown....)
http://theothor.googlepages.com/tubes (different stuff at the GM-20)
*** frihu.com :: History E (Diskussion Qualitätsuntersch.)
Onkel frihus Rhren-Forum: 6C33C Verstrker instabil
6C33C (photoseries destroyed 6C33C exemplare)
6C33C High End Röhrenverstärker
PSE with 6C41C - diyAudio (compare old-new)
Onkel frihus Rhren-Forum: 6C33C Verstrker instabil (discuss about unstable idle-/quiscent current)
Onkel frihus Rhren-Forum: Zwei Anmerkungen dazu (")
GOLDEN MIDDLE Vacuum tube (Choise of brand by "Golden Middle")
Super triode connection drive 6C33C-B SEPP OTL. stereo power amplifier (SEPP-OTL)
?????????????????? ?Release (URLs diff sellers)
EL-TUBES / Price High-End audio tubes (Logos of russian brands)
SED Tubes - Vacuum Tubes Manufactured in St Petersburg, Russia (Svetlana)
Valve Art = O&J Enterprises Co., LTD out of the Shuguang factory
VALVE ART
JJ
JJ-Electronic - Vacuum tubes, Capacitors, Amplifiers - Home
Sovtek KT88-SOV
in@sovtek.ru
Electro Harmonix
Electro-Harmonix | EHX.com | Effect Pedals, Vacuum Tubes, Pro Audio
info@ehx.com
TUNG-SOL
History - Tung-Sol

photos 6C33C - EC33C - 6C33CB - 6S33SV
http://www.nd2x.net/ur4ll/6C33C.jpg
http://www.mclink.it/com/audiomatica/tubes/img/6c33c.jpg (Softek)
http://www.ne.jp/asahi/evo/amp/6c33c/phot0.jpg (EC33C)
6C33C damaged 6C33 devices

The Amplitrex AT1000 Vacuum Tube Test System
> Amplitrex Audio Products
> http://www.amplitrex.com/files/Amplitrex_-_open.JPG

sockets for 6C33C:
YAMAMOTO SOUNDCRAFT HOMEPAGE

 

[FRUGIVO]

tiefbassuebertr
congratulations for this extensive work
absolutely fantastic information about this extraordinary tube 6c33
thanks!

 

[tiefbassuebertr]

Here additional URL's:
BTW - Very interesting to read is this topic from an other forum:
The short "6C33C Survival Guide"
GoodSoundClub - Romy the Cat's Audio Site - The short "6C33C Survival Guide".

More threads about the 6C33C:
6C33C – Lampa ipo ????? ? ??????? ????
Amplificador de PhaSe 1
GoodSoundClub - Romy the Cat's Audio Site
Èíòåðåñíûå ñâåäåíèÿ î 6C33C - Ôîðóìû ÀÓÄÈÎ ÏÎÐÒÀË
6Ñ33Ñ - "íåò", 6Ñ33Ñ-Â - "äà" äëÿ çâóêà? - Ôîðóìû ÀÓÄÈÎ ÏÎÐÒÀË
http://www.diyaudio.com/forums/tubes-valves/115825-ulyanov-currently-manufacturing-6c33c.html
http://www.diyaudio.com/forums/tubes-valves/142528-graaf-gm20-mods-help-3.html
http://www.diyaudio.com/forums/tube...ility-6c33c-tubes-i-need-some-otl-amps-4.html
Eintakt Röhrenverstärker mit 6C33 taugt das was - Allgemeines zur analogen Technik und Wiedergabe - Analog-Forum
Erfahrungen mit Welter ACPP 60 - Verstärker, Lautsprecher, Zubehör - Analog-Forum
http://www.diyaudio.com/forums/tubes-valves/137009-6c33c-b-pp-se.html
life in a vacuum
â»Ãà¨ç¡ÇѹËÂØ´ÂÒÇÀÒ¤ 2 SE6C33 ¤ÃѺ[/QUOTE]

 

[Triodethom]

If it can help, I'm testing a home built 6C33C push-pull amp, and I'm really satisfied with it. Those huge triodes really have a fantastic sound. When driven through an 6n23P SRPP, the full swing can be applied to the grids. Push-pull 6S33S, 6N23P, 6JH8, 6N1P-EV, IN13 By the way, have a look at the phase splitter. Amazing, isn't it? Beam deflection tubes really have fantastic performances, when used as phase splitters. Sorry guys, but the site is not in English yet. (altough it's been planned in a near future...) I'm unsuccesfully trying to find someone who has also tried BDTs, like 6JH8 or 6ME8 in such an application. Has somebody already seen such a design anywhere ? Alain

That chassis has the best steam punk vibe I have seen in a very long time . H.G Wells would have own it . My hat off to you great job !

 

[tiefbassuebertr]

6C33C employed at her full glory as voltage reg. of Russian cruise missile from 60's

go to post #6 about
GoodSoundClub - Romy the Cat's Audio Site - The short "6C33C Survival Guide".
for looking the pictures (from member "Romy the Cat")

I want to have the schematic of this voltage regulator. Perhaps a russian or serbian member can post this schematic.

 

[Alastair E]

What you're asking for is allegedly the schematic of a Cruise-Missile....😱

I dont think summit like that will be readily available!😀

 

[kevinkr]

The surplus Mig radar modules these were used in are sometimes available here at Boston area hamfests, (I've seen a couple) I suspect the schematics are out there - I would ping Wavebourne for suggestions.

 

[pidigi]

.......If you only can, avoid using chinese crap sockets. Try to get sockets of this type. Those run much cooler, I measured only +45C at ab. +20C room temperature, if tubes are installed vertically upright and there circulates freely some air around sockets. No vents in amps!
.......

Nice sockets! Where are they available?

Ciao

Paolo

 

[banat]

Can not publish the schematics from MIG airplanes for sure , but just only my few sentence for 6c33c-b tube :

If we DIY-ers conect together filaments in parallel of one 'Babushka' (6c33c) tube and one ordinary EL34 (or similar tube) from the same accurate 6.3v ( AC or DC ) PSU we will observe next efects in the dark room for sure : 6c33c-b tube reach the kathodes temperature very slow , sometime this tube need even 10 minutes to reach some acceptable operating kathodes temperature and reasonable kathodes emisions,(EL 34 need only 30 - 60 sec for that).

But 6c33c-b kathodes Newer reach the normal orange/red kathodes colour like EL34 kathode does and not the kathodes electrons full power emision to! but 6c33c-b cathodes glows with dark/red or only red colour which is typical for underheated tube kathode. If we look closer in original Russian 6c33c-b tube datasheet specs there is signed that filament suply voltage can tolerate run from 5.7V to 6.9V for parallel heaters conection, and from 11,3V to 13,9V for serial heaters conection.

The Vf sweet spot it is actualy 6,5V for parallel vs 13V for serial conection of 6c33c-b filament voltage, measured strictly on the tube socket filaments terminals, but Not on the filaments suply transformer terminals! With this litle higher filaments voltage and right chosen tube socket 6c33c-b tube will work much better and longer, this is just one of my expirience with this 6c33c-b 'Babushka' tubes.

Best Regards for all

 

[TubeManiac]

Here additional URL's:
BTW - Very interesting to read is this topic from an other forum:
The short "6C33C Survival Guide"
GoodSoundClub - Romy the Cat's Audio Site - The short "6C33C Survival Guide".

So its used in a Cruiser missile ! Cool ! but such a waste of a nice tube

 

[Alastair E]

Ive always run the heaters of 6C33C in Series--Usually 4 tubes in my designs....

Its easier for me to get a 50V transformer of 4-5A than it is a 6.5V Tx of 24A!

My Cathodes are always a nice cheerful orange-colour after only 2 mins or so....

 

[TonyTecson]

this is a good plan......i'll keep this in mind......😀

and you are right about the traffos, it is easier to do a 24 volt 6 ampere traffo than a 6.5 volt at 24 amps....

 

[tiefbassuebertr]

What exactly happens inside of the 6C33, if a defect occurs ??

From the good known power vacuum tubes this type breaks most likely, mainly through a too high anode voltage above 90V (mostly above 180V).
What happens internal after end of life exactly ??