Replace output transformer by ll7401

truong_guitar · 1748

0 Members and 1 Guest are viewing this topic.

Offline truong_guitar

  • Newbie
  • *
    • Posts: 5
on: August 12, 2020, 04:13:24 AM
Hi there,

Has anyone tried to replace the output transformer (OT3) with the lundahl ll7401?
I'm planning to replace it. I don't know how the sound improves
« Last Edit: August 12, 2020, 07:07:10 AM by truong_guitar »



Offline Paul Birkeland

  • Global Moderator
  • Hero Member
  • *****
    • Posts: 19319
Reply #1 on: August 12, 2020, 07:06:22 AM
A 1:1 output transformer is going to make the Mainline sound much, much worse.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline truong_guitar

  • Newbie
  • *
    • Posts: 5
Reply #2 on: August 13, 2020, 04:40:04 AM
Thanks Paul,

Would you like to give me ratio output transformer?



Offline Paul Birkeland

  • Global Moderator
  • Hero Member
  • *****
    • Posts: 19319
Reply #3 on: August 13, 2020, 06:42:39 AM
I would use what we provide in the kit.  I have not run into any other suitable output transformer that will drop into the Mainline circuit and work just as the originals.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline pfontana

  • Jr. Member
  • **
    • Posts: 19
Reply #4 on: January 13, 2022, 06:20:39 PM
Hi,
Just curious if you ever changed out your transformer?
What were the results?
Philip



Offline Doc B.

  • Administrator
  • Hero Member
  • *****
    • Posts: 9540
    • Bottlehead
Reply #5 on: January 14, 2022, 05:48:44 AM
This is a bad idea. I don't understand what the original reason for changing it was. The OT-3 is designed specifically for this application.

Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.