6C33C-B. PP or SE ?

[jleaman]

That is one tube running both filaments.

I have a 16 amp 12 v transformer from a battery charger I am thinking of using for heaters, if the hum is not to bad.

But basically I´m in the same situation. Looking for components, and a suitable schematic. Right now this one is my favorite: http://www.dmitrynizh.com/ecc99-6c33c-se.htm He is using One-Electron UBT-1.

In the meantime I am building a chassis and gathering tubes and hardware.

Above person posted this,

 

[K.A.B]

6C33 tubes get very hot you must really do everything possible to lower the temperature so they go a little bit cooler.

trondareo, that is a cool way to mount the tubes, but then they shall be mounted on something that also look cool as well.

Anders

 

[trondareo]

Right now I am thinking of something like this, possibly just using short tubes to mount them straight out from the chassis.

 

[K.A.B]

I saw that you have a budget to think about jleaman an OTL may fit your wallet when you avoid the cost of the OPT a forum friend both here and on the Swedish forum I am a member of have constructed an OTL with 6C33 tubes

Tubeamplifiers

Contact tubtvr aka Hans he is a nice guy and helps you.

Anders

 

[K.A.B]

Right now I am thinking of something like this, possibly just using short tubes to mount them straight out from the chassis.

It looks very nice trondareo, I also have a lot of sketches on different chassis, but I do not have a chance to do them by myself I needed some big tools and space to do it. They few times I have an opportunity to have access to a workshop then I have too little time to build them, I have to choose a traditional form that is quick to make. It is sad to not be able to do what I want,but that's the life.

Anders

 

[astouffer]

You and this guy think alike

electron luv | hi-fi vacuum tube atomic age audio, amplifiers, speakers, horns, Salt Lake City, UT

 

[azazello]

Above person posted this,

Instead pre tube 6E5P You can use 6P15P /6П15П/, E180F, E280F, EF861....

 

[trondareo]

You and this guy think alike

electron luv | hi-fi vacuum tube atomic age audio, amplifiers, speakers, horns, Salt Lake City, UT

Ahh, yes Josh Stippich of electronluv is a big inspiration.

But without a high tech workshop I have to get by using hand tools and the occasional help of the workshop at work. The nice thing is that aluminum can be cut with wood tools as long as you go slow and use soft qualities of alu.

 

[jleaman]

Instead pre tube 6E5P You can use 6P15P /6П15П/, E180F, E280F, EF861....

Thanks


Any one buying their parts yet ? Ive got my main tubes, and sockets. Now ot start sourcing out other parts.

J'

 

[Midlife]

@jleaman,

I ordered the OPT from Ari Polisois and the other transformers for power supplies, heaters and choke are wound locally in the Netherlands.

I already have the power tubes (10 of them) and found original Russian sockets of which the supplier claims they have superior heat dissipation. He claims that the widely used China made porcelain sockets, also used by manufacturers of tube equipment, lead to premature failure of the 6C33C.

Since mine are installed below the main chassis to create the "chimney effect" it does not matter that they do not look less attractive than the porcelain sockets.

For the 6SN7 I am torn between NOS tubes and the new Sophia Electric 6SN7 which seems to be very good, people who tried them claim they are even better than expensive NOS tubes.

So I am also in the sourcing stage

 

[jleaman]

@jleaman,

I ordered the OPT from Ari Polisois and the other transformers for power supplies, heaters and choke are wound locally in the Netherlands.

I already have the power tubes (10 of them) and found original Russian sockets of which the supplier claims they have superior heat dissipation. He claims that the widely used China made porcelain sockets, also used by manufacturers of tube equipment, lead to premature failure of the 6C33C.

Since mine are installed below the main chassis to create the "chimney effect" it does not matter that they do not look less attractive than the porcelain sockets.

For the 6SN7 I am torn between NOS tubes and the new Sophia Electric 6SN7 which seems to be very good, people who tried them claim they are even better than expensive NOS tubes.

So I am also in the sourcing stage

I'm not sure if i have the crap knock off sockets, i will have to look around and possibly order better ones, but for now they will work while i'm building the amplifier on plywood

Not to sure what schematic to use either, i would like simple, but i also need a psu schematic to follow.

Jase

 

[azazello]

I'm not sure if i have the crap knock off sockets, i will have to look around and possibly order better ones, but for now they will work while i'm building the amplifier on plywood

Not to sure what schematic to use either, i would like simple, but i also need a psu schematic to follow.

Jase

Picasa ??? ?????? - Azazello - KVM

 

[ma_coule]

I'm not sure if i have the crap knock off sockets, i will have to look around and possibly order better ones, but for now they will work while i'm building the amplifier on plywood

Not to sure what schematic to use either, i would like simple, but i also need a psu schematic to follow.

Jase

Hi Jase,
f.E. follow this (& others on the same site):
6C33C-B SE Verstaerker von Juergen Buschmann

 

[jleaman]

Looking simple Perfect for me, i'm pretty new to tubes, i can follow the schematics, i'm more used to solid state so i have "SOME" learning to do with tubes.

I picked the 6c33's because i have 2 free ones with sockets, and they should be perfect for my speakers that i have, very efficient speakers.

 

[Jeb-D.]

I've used the ceramic Chinese sockets for years without problems. You can gently bend the socket clips so that they pinch the tube pins with more tension. The 6c33c pins tend to oxidize, so you will have to clean the tube pins occasionally. I use fine grit sandpaper and/or Deoxit wipes.

 

[jleaman]

I've used the ceramic Chinese sockets for years without problems. You can gently bend the socket clips so that they pinch the tube pins with more tension. The 6c33c pins tend to oxidize, so you will have to clean the tube pins occasionally. I use fine grit sandpaper and/or Deoxit wipes.

I've actually noticed this, the pins on my 6c33's are a little oxidized.

 

[jleaman]

Picasa ??? ?????? - Azazello - KVM

Is this a special ordered transformer ?

 

[azazello]

I think You can order, p.e., to EDCOR-USA. IMO, every tube, every heater must
have separated coil.
/i add, there is mistake in PS /-Ubias/, all elektr. caps must be turned to 180 deg....sorry! And,
important, caps 1 uF parallel to chokes are against hummm/.

 

[Midlife]

@jleaman and jeb-d,

Have you ever visited the "Good Sound Club"?
This is what Romy writes in his survival guide of the 6C33C about the oxide on the pins:

So, here is goes my “6C33C Survival Guide”.

1) A new 6C33C has pins cover with something that I call “white ****”. I have no idea what it is, perhaps some solidified oil or paraffin. Anyhow it should be scrubbed out before you use 6C33C for a first time. If you do not clean up the “white ****” from the pins then it will short the lifespan of your 6C33C tube socket

Maybe this helps, the guys is an experienced user of the 6C33C and his site merits a visit.

GoodSoundClub - Romy the Cat's Audio Site - The short "6C33C Survival Guide".

 

[jleaman]

I think You can order, p.e., to EDCOR-USA. IMO, every tube, every heater must
have separated coil.
/i add, there is mistake in PS /-Ubias/, all elektr. caps must be turned to 180 deg....sorry! And,
important, caps 1 uF parallel to chokes are against hummm/.

I plan on buying 2 transformers, i'm building mono block's so its a bit more $$$, but thats my plan. I have been reading about how hot they get. I'm trying to budget out parts and stuff, pretty hard to do, did you see that i added you to picasa ?