Winders?

[Blair]

Yes,

I've seen high B+ on EL34s, but I don't want a tube rectifier, and I will have close to 550V when it's all said and done whereas, I can use a different transformer and have the more desirable 430-475V without issues for 1/2 or less the price.

Let's see how the preamps move and it will determine whether I buy Transcendar or Edcor:)

Thanks!

Blair

[hawaii.ken]

I was in hopes of using a six pack of EL34s per channel for 150-160W, but Bob's PT is a bit high on the voltage side for the 34s, and I don't want the hassle is reselling the PTs at a loss.

Have you thought about using a six-pack of KT77s:
http://www.hifitubes.nl/weblog/wp-conte ... x-kt77.pdf

[Blair]

I had not until now:) kind of a super EL34 huh?

Thanks!

Blair

[battradio]

If your building from scratch you could use them with a choke input or a voltage regulator tho get the voltage managable from the power transformers .
http://www.neurochrome.com/audio/?page_id=454
I personaly woud go with a 10Henry 500 ma choke .

[rmyauck]

Thought of some other affordable transformer winders.

Check out are Bud Purvine who doesn't have a web site. He is in Bothell, WA and is a nice guy to talk to. He is mentioned on diyaudio etc. as his iron is well liked. He makes transformers in about 4 different levels depending on the budget.

425-823-2279

hpurvine@gmail.com

.
Another guy to talk to is Jack @ Electra-Print. in Las Vegas, NV & he has a Web Site.
Many happy users mentioned on the web.


Here is the Transformer Suppliers list from diyaudio:

http://www.diyaudio.com/wiki/TransformerSuppliers

Randy

[kheper]

http://audio.engineeringvista.com/Trafo ... /index.htm

They claim to have "low cost" double C core PP outputs. No prices on their site. Might be worth it to get a quote.

[Blair]

Thanks Guys!

Yeah, the Trafomatics look good, but at the cost of a wicked lead time. I think I will build with Edcor, and if I really think I need more than 100W, I will leave room to machine the extra holes for another pair of EL34s and The Teanscendars are bigger, so they will cover the hardware holes from the Edcors.

Thanks!

Blair

[Geek]

Anybody knows of one of these guys does high voltage safe transformers?

Edcor passed on a commission to build one with 5KV WVDC insulation because of the quantity of specialized materials they'd have to buy

Cheers!

[Blair]

Hi Gregg,

During my transformer fishing trip recently, I saw no companies offering up front anything like that. I always see these mega transmitting tube amps, and wonder where they get their transformers.

Blair

[EWBrown]

Those are special, custom-ordered and manufactured "monster" trannies, probably made by the big companies like GE, or Westinghouse, or perhaps imported from Germany or Switzerland. LONG lead times...

/ed B

[Geek]

It's looking like I'm SOL.

- Mercury doesn't go that high.

- Transcendar has retired and no longer doing custom work.

- Hammond can, but I have to take 50

That leaves Lundhall They at least *used* to wind for full voltage 811 amps with 3-4KV B+.


Cheers!

[Blair]

Transcendar is no longer making transformers, or just not custom work!?

[rmyauck]

Gregg

I thought MagneQuest did custom ones? What about O-netrics & Electra-print, & Dave Slagle of Intact Audio.

Good luck!

Randy

[Geek]

Slagle's not set up for that HV I don't think? I'll ask, though.

MQ has never, ever returned an email to me (I've contacted them in the past before I discovered Edcor). I'll try again.

I forgot about Electra-print.

O-Netics I may meet in a couple weeks at Audiofest. I'll ask.

Cheers!

[rmyauck]

I did talk to Mike (MagneQuest) in the past asking about 8-10K PP OPT and he told me about his Z-565's. Nice guy to talk to, maybe not into email or it wasn't reliable at the time.

You may get a hold of him in the evening.

215-288-4816

Regards!

Randy