845 SET OPT advice - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 20th September 2014, 08:05 PM   #1
diyAudio Member
 
Join Date: Aug 2014
Default 845 SET OPT advice

I wish to purchase good quality output transformers for single ended amp using 845.

I can spend up to $500 each.

I am not averse to a wind-it-yourself-kit, but not aware that there are any for SET OPT's, although an SET OPT is much more doable than a PP.

I am planning on high voltages: 800 to 1.2 KV B+ at 100 mA, although I may have to moderate on that, I understand

I will be running the 845's into grid conduction using George's Power Drive circuit at his TubeLab site, to get much more power out of the 845's.

Finally, I MIGHT run two 845's in parallel for double the power....so an OPT winder who is capable of a custom job (yeah, more money) would be great to be able to talk to.

All advice really welcome.

Very Best Regards, Synchro27

Last edited by synchro27; 20th September 2014 at 08:28 PM.
  Reply With Quote
Old 28th September 2014, 03:26 AM   #2
diyAudio Member
 
lowtherdream's Avatar
 
Join Date: Apr 2007
Location: Montreal, Quebec, Canada
There are many choices...

James JS-6159HF $690/pair
Hashimoto H-30-5S $1000/pair
Tango X-10SF $1400/pair
Tamura F-2013 $1000/pair
Lundhal LL1691 $380 each
Electra-Print $400 each
Audio Notes TRANS-310/IE $650/each
Sowter SE09 $300 each

I havent heard any of them and I don't know if there is someone that was able to compare them all.

I would personally go for Electra-Print custom made transformers. It will parbably be the best value.
__________________
surfing the 2nd harmonic ... @@@@
  Reply With Quote
Old 28th September 2014, 03:51 AM   #3
diyAudio Member
 
Join Date: Aug 2014
Thank you so much. I will look up the Electra-Prints for sure - but I'll look at 'em all. I didn't know where to start, so this is wonderful.

I've been studying the instructions on Patrick Turner's website for the dual-845 SET OPT he custom wound....I might attempt it, but I don't know about sourcing all the parts - and I am thinking that in the end I might not end up saving that much money...and I might not end up with OPT's nearly as good as I want.

thanks again; now I know what to go look up.

Very Best, Synchro27
  Reply With Quote
Old 29th September 2014, 06:35 PM   #4
diyAudio Member
 
Join Date: Aug 2014
does anyone have a source for GOSS C-cores?

I have decided...well, maybe...to wind my own OPT's. But I do not want to use the Met-Glas Amorphous cores, no matter how much they are touted.

I just want to use plain old Grain Oriented Silicone Steel C-cores, but with a lamination thickness of .05 mm (.002") or less.

There are GOSS cores on the web, but the lams are .014" thick, too thick by far (because they're intended for 60 Hz).

I can get GOSS "tape" lamination material in .05 mm, but coiling it and forming it and heat treating it....is a challenge, to say the least.

Very Best, Synchro27
  Reply With Quote
Old 29th September 2014, 07:01 PM   #5
diyAudio Member
 
Join Date: Aug 2014
Ah, I found one:

Eilor. http://www.eilor.co.il/Media/Uploads...Catalog(1).pdf

And with .05 mm lam thickness, too. Eggzellente'

Now to see if they'll sell twosies, and at what price.

Very Best, Synchro27
  Reply With Quote
Old 4th November 2014, 08:09 AM   #6
diyAudio Member
 
Join Date: Jun 2010
Quote:
Originally Posted by lowtherdream View Post
There are many choices...

James JS-6159HF $690/pair
Hashimoto H-30-5S $1000/pair
Tango X-10SF $1400/pair
Tamura F-2013 $1000/pair
Lundhal LL1691 $380 each
Electra-Print $400 each
Audio Notes TRANS-310/IE $650/each
Sowter SE09 $300 each

I havent heard any of them and I don't know if there is someone that was able to compare them all.

I would personally go for Electra-Print custom made transformers. It will parbably be the best value.


Tamura f 2013 1000$pair ... Pleese mee link to buy thank s
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
845 set bias. mcnaget Tubes / Valves 35 11th November 2014 05:49 PM
Mr. Lian 845 SET – more kit rather than commercial product. avp1 Tubes / Valves 10 20th October 2014 02:37 PM
music angel 845 SET PeterParsons Tubes / Valves 8 11th November 2013 04:12 AM
Help me to work on the damping factor of my 845 SET rdk845 Tubes / Valves 17 18th May 2009 03:04 PM
Tubes for Viva Solista 845 SET amp angeloitacare Tubes / Valves 9 19th September 2008 04:22 PM


New To Site? Need Help?

All times are GMT. The time now is 08:48 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2