An externally hosted image should be here but it was not working when we last tested it.
I've just completed my first project. A Zen Triode Clone(decware). My goal was to learn a few thing about tube amps in a practical manner so it was basically a scrap build.
The next step is 6c33 SET. They are cheap but powerful military spec triodes. I bought them for ~8 euros. This won't be just a scrap build. I want to build the best amp i can afford. The opt's will be custom made. -> i need a source of c-cores in europe
Stereo/monoblock -> wich is better?
Schematic -> which is the best one
RR
Hi RR,
Take a look at Romy the Cat's site (goodsoundclub).
He has much experience with the 6C33; you will find his Melquiades amplifier there.
When you have winding possibilities overthere I would be willing to supply you with some HiB c-cores.
Please note: there exists no "best schematic".
Especially with SE amplifiers take the loudspeaker into consideration; it must play well together.
Take a look at Romy the Cat's site (goodsoundclub).
He has much experience with the 6C33; you will find his Melquiades amplifier there.
When you have winding possibilities overthere I would be willing to supply you with some HiB c-cores.
Please note: there exists no "best schematic".
Especially with SE amplifiers take the loudspeaker into consideration; it must play well together.
imho EL84 or KT88 triode strapped is a much better choice for audio applications. 6C33C suitable for OTL but once OT is involved there is no benefit using it.
Lundahl (SE) makes good trafos. Double U core claims to be the best design for OT permalloy or amorphous. Magnequest (US) had cobalt cores in stock several years ago probably the most rare and exotic ones.
In case Russian tubes seems to be appealing GU72 (ГУ72) is a very good output tetrode for a SET needs B+ at least 650V however.
Lundahl (SE) makes good trafos. Double U core claims to be the best design for OT permalloy or amorphous. Magnequest (US) had cobalt cores in stock several years ago probably the most rare and exotic ones.
In case Russian tubes seems to be appealing GU72 (ГУ72) is a very good output tetrode for a SET needs B+ at least 650V however.
:I have a EL84 trioded allready 
. It is sweet. I also have a few 6c33 and a big appeal to build something with them. Lundhal is to expensive . I just need good cores. There is someone here who can wind the bobins. He is good. Very good. But from what i know he has only EI cores. And i want C-cores. Eventually i will make my own Xfos. But not yet.
The 6c33 might not be the best choice but 20W SE with ~220V ?
It's a muscle car. BIG FAT engine, low milage but great sound !(i hope )
. It is sweet. I also have a few 6c33 and a big appeal to build something with them. Lundhal is to expensive . I just need good cores. There is someone here who can wind the bobins. He is good. Very good. But from what i know he has only EI cores. And i want C-cores. Eventually i will make my own Xfos. But not yet.The 6c33 might not be the best choice but 20W SE with ~220V ?
It's a muscle car. BIG FAT engine, low milage but great sound !(i hope
)Do you have an idea what dimensions you would need?
There are different ranges for c-cores; I don't have them all.
Simply not true; mighty fine output transformer coupled amplifiers are made with the 6C33.
I am sorry but you can find the data on c-cores yourself on the www.
Look for the SM, SE, SG and SU series.
I'll do that. I don't know yet the notations for cores.
Which schematic?
http://www.goodsoundclub.com/PDF/Melquiades_SET.pdf
or
6c33+cb+se+borely.jpg (image)
Which schematic?
http://www.goodsoundclub.com/PDF/Melquiades_SET.pdf
or
6c33+cb+se+borely.jpg (image)
Good looking good price but i live in EU
). so shipping will more then double the cost i guess. do you own a pair?Especially for 6C33, already a low Rp tube, low DCR transformers are very important to squeeze out maximum performance; this is easily audible.
If you look at the afore mentioned opt's you don't find dcr specs, and that is just the difference between mediocre and high quality; everything has it's price.
Power wise the cores seem sufficient, but running 250 mA DC current through the primary and asking sub 20 ohms primary DC resistance at the same time will not go with these dimensions.
If you look at the afore mentioned opt's you don't find dcr specs, and that is just the difference between mediocre and high quality; everything has it's price.
Power wise the cores seem sufficient, but running 250 mA DC current through the primary and asking sub 20 ohms primary DC resistance at the same time will not go with these dimensions.
No I have a welter powersupply transformer.
High german quality clean finish. The transformer is(I think) vacuum treated and even the bolts have a insulation tube to prevent noise from the core, even in detail nice no nonsense finish.
I am very satisfied with the Welter-transformer.
test review of the welter 6c33 kit.
http://www.welter-electronic.de/bilder/fertig_geraete/endstufen/testbericht_wt500_eb3_pdf_dat.pdf
frequency response of the kit.
Maybe it is clever to indicate what you actually need
Series feed or parallel feed: different output transformers.
Once more, I'd be willing to help you with the cores, but the remaining part is in the spirit of this forum: DIY.
The Welter HE-ET 6 specifies a Rdc of 56 OHM. 116 euro for one high-end SE- transformer. That makes DIY fun again.
56 ohm of primary DCR is more than 50% of the 6C33 Rp.
Imagine for instance a 300B opt with a primary DCR of 400 ohms....
Do you get what I mean?
Of course the lower price is nice, enhancing the fun, but, once more, if you want to squeeze out the 6C33 what is possible, these transformers are not "high end" but just mediocre.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.