NOTE: 6N6P tube should be replaced every year! Every year? Why?
Do you have the schematic diagram of that ML2.1?
Do you have the schematic diagram of that ML2.1?
I don't know. Looks like a funny specification. I could buy the amp and use it for low hours.....😕
No, I am sorry. I don't think it is better than yours......😉
30000$ for the pair?😱
No thanks!😀
6C33CB make s a great OTL amplifier! Also, makes a great push pull amplifier like the BAT VK-60! You need to know about the toroid output transformer they use though before you can build this.
Mark
Mark
Yes, and are there any of the shelf transformers that are suitable for it?
Like the Edcore 600 Ohm´s mentioned earlier?
When I "designed" my SET 6c33 amp with the help of glass audio software I could never get good performance from low voltage high current operating points into 600 ohms.There was high distortion and low output power never reaching the claimed 15w rms (more like 8w).In the end I opted for higher voltage lower current into 1k and around 12w.A good single stage driver tube is the 6c45 running near its voltage limits and choke or ccs loaded.
Hello,
I have got 16Wrms from a 6c33c SE which uses 600 ohm transformer (Edcor) biased at aprox 200V 250mA.
Did you try changing the output tube? I bought a box of 10 and found that a couple of them didn't put out as much power as the rest.
6c33
6C33 is a DC voltage regulator.. this tells everything, unlinear, low efficiency for audio, high heater power. the only good thing, it looks nice. it is something to forget about for audio, lots of distortion, tends to oscillate when not prperly designed around... and much more. the low Rp is not a criteria to choose this bottle, which was intended to fly in a russian Mig...
6C33 is a DC voltage regulator.. this tells everything, unlinear, low efficiency for audio, high heater power. the only good thing, it looks nice. it is something to forget about for audio, lots of distortion, tends to oscillate when not prperly designed around... and much more. the low Rp is not a criteria to choose this bottle, which was intended to fly in a russian Mig...
Buy the SE kit by B. Aloia and you will get 30W form one tube just before the clipping without exceeding the maximum ratings of the tube. If you are not able to do that it's another story.....
Well, 6C33 costs few euros, do not need high tensions, good power output, its sounds is good, what to ask more to a SE amp?
This is the usual thoughts about 6C33C-B aka 6S33S-V but as I see it, there is no perfect tubes -valves or there is.
I have an SET since couple years back and I'm really happy. I have built my SET after Ari Polisois circut, I also bought the OTP of him.
I found Ari's Simplex after I searched infomation on 6C33 SE amplifiers, even if it does not follow the normal path I found it so interesting that I just have to build me one.
I guess that I have around 15W from the amplifier, but very pleasant sound but there are some upgrades after my purshase and these have improved the sound. I have made some minor changes in the power supply but Ari have make it to.
I have the SC-OTP next time I will go for the SC-SCC version.
Polisois audio amplifiers and transformers: designing and building audio amplifiers and output transformers
D.C.M.B.
Anders
😀 hmm then it will be to buy marsmallows in my horn system I dont need that massive power.
I missed to tell about my OTP are little different to the OTP Ari sells now mine are custom made fore me.
Anders
I missed to tell about my OTP are little different to the OTP Ari sells now mine are custom made fore me.
Anders
i see, the defenders are back to work. music naturally contains a percentage of harmonics. the DC regulator tubes add odd harmonics. there is nothing that can be told "hifi", just look at the plate characteristics. the meaning: "i like them a lot" is not a clear expression, it seems to be just a defense of diy self constructed equipment. as said before: every tube MUST be good for any purpose bcc. it is a tube is a statement. the sales has won the battle again and the believe. no numbers of THD or so are presented, just personal impressions . personal impressions are just for one case, but do they apply for the majority?. we know all that DIYers are a kind of hardcore in defending the results.. audio is a very personal result, therefor it should be measured according to a standard and compared. an expression like: I am satisfied since years etc. is not repeatable and therefore witout any technical value.these statements simply dont exist in a databook. nowadays it is popular to misuse any tube with graet statements just for thesales: ary, sound ( means what he he ) deep bass not ok=(transformer not good?), mid sound level dull..... we have in amplification a lot of complex problems ( seee smith chart) which are simply overheaerd by people. tube is not any tube, its so simple. or: do they tell you: this is a steak, but in reality its cabbige?
Buy the 30W kit from Aloia, you will get certified results. Also you can go to his lab in Turin and verify THD, IMD and anything you like before buying, if you like.
A tube alone doesn't make the amplifier!
In the end listening HAS the last and most important word, otherwise 0.00001% SS amplifiers would be the best.
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