SE Output Transformers

[DVDHack]

Well I'm certainly no 300B snob - especially given that three weeks ago I didn't know any such beast exists. All I knew was EL34s and 6L6s and that was from my guitar days.

I selected the 300Bs because so many sites seem to support them and there is so much being done with them - so I thought for a new boy I would find more support.

Perhaps I'll post another thread on what valves - god help me.

[Raka]

I take the opportunity to ask you, tube masters, about the trannies.
Lately I've found that I can build my own transformers, as I have the magnetic sheet, the enameled wire and some books on trannie design (standard ones). Could someone point out some tips about features required for this kind of output transformers? any web?
Thanks.

[angel]

While I would not recommend winding your own transformers, considering safety regulations and all that, I do believe Google should be able to turn up a few references on the subject.

If not, give me a private message, and I'll see if I can dig up a few book references that I had lying about a little while ago.

[Raj1]

Originally posted by fdegrove
Hi,



No they don't...They just look like any nude xformer.

The savings of NOT potting them are passed on to you, including the potential of a better sounding OPT.

Nothing against Sowter but....

Cheers,

yep, I've used sowter, the trannies sound great, but I do feel the range of options including the range of cores is a bit limited. I think lundahl use C cores, and these are supposed to be superior to EI types.

I have heard support for AE too, they have the best prices I've seen for Amorphous cores, would love to try them in a 300b design!


Thanks
Raja

[Brett]

Originally posted by DVDHack
I selected the 300Bs because so many sites seem to support them and there is so much being done with them - so I thought for a new boy I would find more support.

There's lots of people building 300B amps, but I don't see why that would mean you'd get more "support" building a 300B SE, or a R. Power 2A3 PP or a Dyna ST35 variant or ........

Actually building a published design isn't that hard and any questions on faults or difficulties in construction would probably be answered by the same bunch of people here irrespective of the design as most are common things such as hum or grounding.

Besides, suppose you chose to build a JE or an F&B 300B SE, everyone buiilds theirs differently so unless you copy someone else's implementation, you're on your own to an extent anyway.

I'd suggest as a beginner tube project, you don't build a 300B. Quality tubes are too expensive.

[Positron]

Was wondering how the electraprints stack up to some other brands mentioned?

[DVDHack]

So can anyone with a bit of experience across multiple transformer sets rank them in terms of perceived quality?

Should the Chokes be from the same manufacturer?

Thanks Again

Ralf

[fdegrove]

Hi,

Should the Chokes be from the same manufacturer?

Plate chokes or PS chokes?

Either way they do not have to be from the same manufacturer at all.

Why should they, after all....

So can anyone with a bit of experience across multiple transformer sets rank them in terms of perceived quality?

If ever you meet someone having experience with all currently manufactured OPTs, let us know....

Cheers,

[mcs]

Originally posted by Gabevee
One Electron. Model UBT-3.

Far superior to the Hammond for the same price.

Very clean and linear response. Very lifelike. Very sweet.

I guess I should get them installed in my amp... I bought a pair when they were on sale.

They may be better than the B&O transformers I use now

Best regards,

Mikkel C. Simonsen

[mcs]

Originally posted by Raka
Lately I've found that I can build my own transformers, as I have the magnetic sheet, the enameled wire and some books on trannie design (standard ones). Could someone point out some tips about features required for this kind of output transformers? any web?
Thanks.

I have a bit of imformation here: http://stiftsbogtrykkeriet.dk/~mcs/

It's from an old German book and a German magazine. I have never wound any myself, but I guess the formulas should work. At least the power transformer formulas from the same book work nicely...

Best regards,

Mikkel C. Simonsen