What to do with these Eimac tubes? - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

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 11th December 2012, 03:18 AM   #11
diyAudio Member
 
astouffer's Avatar
 
Join Date: Jun 2004
Location: Pittsburgh, crumbling wasteland
Here's another one for the 100TH.
Attached Files
File Type: pdf 100thse.pdf (23.1 KB, 112 views)
  Reply With Quote
Old 11th December 2012, 01:20 PM   #12
djn is offline djn  United States
diyAudio Member
 
djn's Avatar
 
Join Date: Oct 2004
Location: Waterford Michigan
Well Dang!!! I wish I never saw this thread. I've taken a break from audio due to life issue for a two years, but now all is well and I am back at it.....hard!

Yesterday I pulled out my GM70 project and started looking at what I needed to do to finish it. I've been poking away at this amp for the better part of 5 years and the whole time I've been going back and forth about using the GM70 or the 100TH. I landed on the GM70 but now..........

I think my schematic would allow me to drop in the 100TH by only changing the heater stuff.

Has anyone heard 100th SE amp???
__________________
My "Art" website http://home.comcast.net/~djnagle/site/
  Reply With Quote
Old 11th December 2012, 02:26 PM   #13
JoshK is offline JoshK  Canada
diyAudio Member
 
Join Date: May 2004
Location: Toronto, ON
I'd think I'd rather use the 100TH as a driver (~38mu) to drive the GM70. Think Electronluv.
  Reply With Quote
Old 11th December 2012, 03:57 PM   #14
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
The late Jim Williams showed how to use one of these beasts in a voltage regulator:

Click the image to open in full size.
  Reply With Quote
Old 11th December 2012, 07:55 PM   #15
Gluca is offline Gluca  Italy
diyAudio Member
 
Gluca's Avatar
 
Join Date: Nov 2004
Location: Back to Italy
Quote:
Originally Posted by JoshK View Post
I'd think I'd rather use the 100TH as a driver (~38mu) to drive the GM70. Think Electronluv.
Problem is its high Rp (I measured 15k in a old amp I built) which makes 100TH just OK to drive other those big bottles that like to swing into A2. You'd better limit the operation of output tube to deep A1 and stay away from grid current. I ended up loading the 100TH with a CCS and used the mu-out

Meeehh ... my amp was initially a 100TH driving 304TL, tried 100TH and GM70 but I was liking 304TL more ... it was way too hot and was dismantled and reassembled as a direct coupled 801A-75TL

Schematic attached (note the missing bridges in the filaments supplies).
Attached Images
File Type: jpg BB30414_04.jpg (587.0 KB, 226 views)
File Type: jpg 100TH_GM70_AMP.jpg (449.1 KB, 212 views)
File Type: jpg 100TH_GM70.jpg (123.2 KB, 208 views)
  Reply With Quote
Old 11th December 2012, 08:20 PM   #16
diyAudio Member
 
steve516's Avatar
 
Join Date: Feb 2011
Location: Chicago, IL
Quote:
Originally Posted by Gluca View Post
Problem is its high Rp (I measured 15k in a old amp I built) which makes 100TH just OK to drive other those big bottles that like to swing into A2. You'd better limit the operation of output tube to deep A1 and stay away from grid current. I ended up loading the 100TH with a CCS and used the mu-out

Meeehh ... my amp was initially a 100TH driving 304TL, tried 100TH and GM70 but I was liking 304TL more ... it was way too hot and was dismantled and reassembled as a direct coupled 801A-75TL

Schematic attached (note the missing bridges in the filaments supplies).
What a beautiful amp. Gives me some inspiration for the several 304tl/th I have downstairs. Believe I also have some massive iron, at least for the PSU. Don't have an OPT though. How'd it sound?
__________________
Completed: PP 807's, 6SN7/6SL7 Phono Pre
Currently Working On: 808 SE DHT
  Reply With Quote
Old 11th December 2012, 08:39 PM   #17
Gluca is offline Gluca  Italy
diyAudio Member
 
Gluca's Avatar
 
Join Date: Nov 2004
Location: Back to Italy
304TL sounded terrific. 75TL is even better. Now this is the amp I ended with:

PSU: 866A into LLCLLC (separate for driver and power tube)
Filament: bridge into LLCLLCL
4 chassis
100kg

Note: LL stands for dual bobbins choke, one coil on + and one coil on -
Attached Images
File Type: jpg BB_801A_304TL.jpg (95.8 KB, 178 views)
File Type: jpg imgp49491.jpg (89.7 KB, 130 views)
File Type: jpg imgp50211.jpg (24.6 KB, 109 views)
  Reply With Quote
Old 13th December 2012, 06:02 AM   #18
diyAudio Member
 
Join Date: Apr 2010
Location: Iran
on 10th Dec 2012 DIY a 211 Amp with vt25 or el34.

now 13th Dec Eimac Monster 250TH . very nice DIYer and nice job.
  Reply With Quote
Old 13th December 2012, 08:51 AM   #19
Banned
 
Join Date: Jun 2011
Blog Entries: 1
Quote:
Originally Posted by navidstat View Post
on 10th Dec 2012 DIY a 211 Amp with vt25 or el34.

now 13th Dec Eimac Monster 250TH . very nice DIYer and nice job.

Uh you keep saying than nonsense as you're one of Hooman's right hand mans
you'd better not mess with real DIYers here and be advised by me and go to your English class so you won't seem as a blah blah blah guy from slum block of tenement building of a third world who just can't simply digest a devastatingly piece a cake English sentence
what have you done yourself? Uh humbly nothing?! that's freakin' good we've seen photos of your DIYed tube gears on the cover of every magazine and on the decaying walls of this city

but be patient you'll see what will come up from my 211 project.

btw, don't stock your nose in other's personal issues. mind your business
  Reply With Quote
Old 13th December 2012, 08:59 AM   #20
freax is offline freax  Australia
diyAudio Member
 
freax's Avatar
 
Join Date: Sep 2007
Location: NSW
Quote:
Originally Posted by Gluca View Post
304TL sounded terrific. 75TL is even better. Now this is the amp I ended with:

PSU: 866A into LLCLLC (separate for driver and power tube)
Filament: bridge into LLCLLCL
4 chassis
100kg

Note: LL stands for dual bobbins choke, one coil on + and one coil on -
You don't see many amps as beautiful as this, wow!! (Only in my dreams)

Why is this not in the gallery to be drooled upon!
__________________
"It seems that perfection is reached not when there is nothing left to add, but when there is nothing left to take away" - Antoine de Saint Exupéry
  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
Eimac 450th nos MarjanM Tubes / Valves 2 9th September 2012 04:41 PM
WTB Eimac 304TL, TH, other big tubes! steve516 Swap Meet 5 8th December 2011 06:20 AM
What about the Eimac 3-500z? Toobstheway Tubes / Valves 18 8th January 2009 06:48 AM
Any Eimac Scematics? ak_47_boy Tubes / Valves 7 1st April 2007 10:19 PM
Eimac 35TG ReinoutdV Tubes / Valves 6 7th September 2005 03:24 PM


New To Site? Need Help?

All times are GMT. The time now is 11:11 PM.


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