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January 17, 2022, 08:19:31 PM

Author Topic: Replace output transformer by ll7401  (Read 455 times)

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Offline truong_guitar

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Replace output transformer by ll7401
« 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

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Re: Replace output transformer by ll7401
« 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

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Re: Replace output transformer by ll7401
« Reply #2 on: August 13, 2020, 04:40:04 AM »
Thanks Paul,

Would you like to give me ratio output transformer?

Offline Paul Birkeland

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Re: Replace output transformer by ll7401
« 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

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Re: Replace output transformer by ll7401
« 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.

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Re: Replace output transformer by ll7401
« 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.