Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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

JJ 2A3-40 for Lynn Olson Amity
JJ 2A3-40 for Lynn Olson Amity
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 October 2019, 12:53 PM   #41
Tubenstein is offline Tubenstein
diyAudio Member
 
Join Date: Aug 2011
I just received a circuit diagram of Amity and both from the same date.

Both Lundahl LL9202AM and LL1620AM are adequate for Amity application. But I wonder which one is better for the application.

My friend says both Lundahl transformer can be made with air gap.

Any thoughts??
Attached Images
File Type: gif (4-26-2004).gif (56.2 KB, 132 views)
File Type: gif IT-Triode-Amp.gif (51.4 KB, 123 views)
  Reply With Quote
Old 20th October 2019, 01:42 PM   #42
indra1 is offline indra1  Indonesia
diyAudio Member
 
Join Date: Nov 2010
Location: Bogor
Why don't you read the datasheets and tell us what's on your mind?
  Reply With Quote
Old 20th October 2019, 04:43 PM   #43
Tubenstein is offline Tubenstein
diyAudio Member
 
Join Date: Aug 2011
Quote:
Originally Posted by indra1 View Post
Why don't you read the datasheets and tell us what's on your mind?
My friend told me LL1620AM is good as he is building the same amplifier.
  Reply With Quote
Old 20th October 2019, 04:52 PM   #44
indra1 is offline indra1  Indonesia
diyAudio Member
 
Join Date: Nov 2010
Location: Bogor
Something is in your mind you are not telling us. What concerns you?
  Reply With Quote
Old 21st October 2019, 01:12 AM   #45
Hanze Khronye is offline Hanze Khronye  Australia
diyAudio Member
 
Join Date: Jan 2018
Quote:
Originally Posted by Tubenstein View Post
What do you think 6.6K toroidal PP output transformer

I haven't had experience with them. I used LL1620 which was replaced with O-netics entry level 6k6.
  Reply With Quote
Old 21st October 2019, 11:35 AM   #46
Tubenstein is offline Tubenstein
diyAudio Member
 
Join Date: Aug 2011
At first I consider to use Toroidy transformer with tentlabs autor-bias module to avoid the DC imbalance, however, if cost is put into consideration.

Sounds like the LL1620AM PP with air gap is a better deal as auto-bias module not cheap!
  Reply With Quote
Old 21st October 2019, 01:00 PM   #47
Tubenstein is offline Tubenstein
diyAudio Member
 
Join Date: Aug 2011
Quote:
Originally Posted by Hanze Khronye View Post
I haven't had experience with them. I used LL1620 which was replaced with O-netics entry level 6k6.
Did you have LL1620 amorphous core?
  Reply With Quote
Old 21st October 2019, 02:14 PM   #48
analog_sa is offline analog_sa  Europe
diyAudio Member
 
analog_sa's Avatar
 
Join Date: Aug 2002
Location: Cascais
JJ 2A3-40 for Lynn Olson Amity
The AM version has one obvious advantage when introducing a meaningful airgap: there will be plenty of inductance left. Otoh i am not sure how great is Lundahl's idea of using the same size core when moving from steel to AM.
  Reply With Quote
Old 21st October 2019, 08:07 PM   #49
Hanze Khronye is offline Hanze Khronye  Australia
diyAudio Member
 
Join Date: Jan 2018
Quote:
Originally Posted by Tubenstein View Post
Did you have LL1620 amorphous core?

Just the standard version.
  Reply With Quote

Reply


JJ 2A3-40 for Lynn Olson AmityHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Where's Lynn Olson's Ariel Website gone? tcpip Multi-Way 3 20th June 2004 07:56 AM
Lynn Olson's web site: AWOL? Kashmire Tubes / Valves 1 20th December 2003 04:41 PM
Ariel by Lynn Olson- How good are they really? Samuel Jayaraj Multi-Way 4 23rd November 2003 10:20 AM
Lynn Olson's ME2 Bas Horneman Multi-Way 16 25th October 2002 03:01 PM
FS: Ariels - Lynn Olson design bbaker6212 Swap Meet 3 2nd October 2002 06:18 AM


New To Site? Need Help?

All times are GMT. The time now is 02:40 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki