STABILITY.
Hi,
Buy a hundred,select two?
Cheers,
Hi,
I'm a little concerned about current stability in the output tube 6c33.
Buy a hundred,select two?
Cheers,
BRIDGES
Hi,
Not as it is now.
You could replace the SS diodes with 4 damper tubes but you'll need to feed the heaters as well.
Cheers,
Hi,
Also, to simplify, could I use one tube to replace that bridge rectifier (i believe thats the correct name)?
Not as it is now.
You could replace the SS diodes with 4 damper tubes but you'll need to feed the heaters as well.
Cheers,
The simplest way is with silicon diodes.Noone has yet answered my question about replacing bridge rectifier...any takers?
I have used a 2W ECL82 (6BM8) single ended amp on my 89dB B&Ws, and it was easily powerful enough to rock the room, with a woofer movement of an inch or so before audible distortion. I have heard that, on average, most listening is done below 1 Watt.
This is why I suggest you don't need that much power. Ask yourself how often you really crank your system to roof raising levels. If its all the time, then maybe you need a more powerful amp. If, like myself, most of your listening is done at low-to-medium levels, a small amp will suffice. I am a big believer in "less is more."
Also, valve watts are bigger!
To build a PP 25W amp for less than $US200 would involve some pretty nasty compromises, whereas you could build a pretty nice SE 8-10W amp for $200. Also it can be difficult to build a good sounding PP amp, whereas SE amplifiers are an order of magnitude simpler.
For a novice, I would try to make it as easy as possible for yourself! Either rebuild a vintage hi-fi amp (easy with good results) or build yourself a simple, low cost SE amp from scratch.
~my $0.02
This is why I suggest you don't need that much power. Ask yourself how often you really crank your system to roof raising levels. If its all the time, then maybe you need a more powerful amp. If, like myself, most of your listening is done at low-to-medium levels, a small amp will suffice. I am a big believer in "less is more."
Also, valve watts are bigger!
To build a PP 25W amp for less than $US200 would involve some pretty nasty compromises, whereas you could build a pretty nice SE 8-10W amp for $200. Also it can be difficult to build a good sounding PP amp, whereas SE amplifiers are an order of magnitude simpler.
For a novice, I would try to make it as easy as possible for yourself! Either rebuild a vintage hi-fi amp (easy with good results) or build yourself a simple, low cost SE amp from scratch.
~my $0.02
6C33C SE
Hi,
Here's another nice SE amp using the 6C33.
Unfortunately the site is in German so you'll have to run it throug some translating software.
SIEGFRIED NEUMANN
Cheer,
Hi,
Here's another nice SE amp using the 6C33.
Unfortunately the site is in German so you'll have to run it throug some translating software.
SIEGFRIED NEUMANN
Cheer,
Watts is watts
But they SEEM bigger.
That's because you can turn up a valve amp further before the disortion becomes unpleasant.
The overload characteristics are kinder to music and to our ears, so you can go a bit further.
That's the way i see it.
Cheers,
Of course they're the same.Also, valve watts are bigger!
But they SEEM bigger.
That's because you can turn up a valve amp further before the disortion becomes unpleasant.
The overload characteristics are kinder to music and to our ears, so you can go a bit further.
That's the way i see it.
Cheers,
SOFT CLIPPING
Hi,
Is there another explanation then?
Cheers,
Hi,
That's the way i see it
Is there another explanation then?
Cheers,
Hello,
The cathode bias circuit don't need bias circuit in the power supply,
but it would need higher voltage supply, and some power
would be dissipated in the cathode resistor.
The fixed bias have little more complex power supply, but it
have lower distortion than cathode bias circuit, and there is no
much power dissipated in cathode resistor.
And here below are some voltages that should appear on the circuit :
Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
There is a 6c33 design I've seen that uses cathode bias, and a more regular power supply.
From what I've heard, fixed bias on these is trouble.
The cathode bias circuit don't need bias circuit in the power supply,
but it would need higher voltage supply, and some power
would be dissipated in the cathode resistor.
The fixed bias have little more complex power supply, but it
have lower distortion than cathode bias circuit, and there is no
much power dissipated in cathode resistor.
And here below are some voltages that should appear on the circuit :
Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
Attachments
Frank,Here's another nice SE amp using the 6C33.
This one is also fixed bias. Now I know that it seems as if I'm being a pest but one stipulation was that his amp should not blow up.
I just can't seem to find the one I remember.
Of course we could convert it to cathode bias. Easily.
Cheers,
Is there another explanation then?
The magic happy valve fairies make the watts bigger.
Hello,
And here below is one very clear look at the 6C33C-B triode :
Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
And here below is one very clear look at the 6C33C-B triode :
Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
Attachments
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