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Best audiotransformers

172.56.201.247
Posted on April 22, 2024 at 01:16:25
thermionic addictions
Audiophile

Posts: 895
Joined: June 16, 2006



I received a pair of these transformers form Best audiotransformers as well. The build quality is excellent. Martin does very nice work. I haven't had an opportunity to use them in an amp yet but these might get me off my butt and get me started on the amp they are intended for.

Cal

 

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RE: Best audiotransformers, posted on April 22, 2024 at 02:15:33
Best audiotransformers
Industry Professional

Posts: 99
Joined: December 4, 2023
 Well hurry up Cal, build your amp now!

Succes, Martin

 

And these would be for a 45/2A3 in a high mid/Tweeter amp?, posted on April 22, 2024 at 07:31:42
Chip647
Audiophile

Posts: 2700
Location: The South
Joined: December 24, 2012
 Just curious

 

RE: And these would be for a 45/2A3 in a high mid/Tweeter amp?, posted on April 22, 2024 at 10:14:34
thermionic addictions
Audiophile

Posts: 895
Joined: June 16, 2006
 They will go in 801A/eimac75tl amps driving a pair of front loaded horns.

 

RE: And these would be for a 45/2A3 in a high mid/Tweeter amp?, posted on April 22, 2024 at 12:43:07
Best audiotransformers
Industry Professional

Posts: 99
Joined: December 4, 2023
 any other tube is possible :)

 

40mA above 800hz?, posted on April 25, 2024 at 05:25:22
Chip647
Audiophile

Posts: 2700
Location: The South
Joined: December 24, 2012
 40mA and F => 800hz
What is the highest working voltage?

 

RE: 40mA above 800hz?, posted on April 25, 2024 at 08:22:20
Best audiotransformers
Industry Professional

Posts: 99
Joined: December 4, 2023
 The transformers frequency response is flat at 800Hz, 40mA is the dc current.
I did not tested the maximum dc voltage but i can test up to several kV if needed, for now at least 600V. For better phase response the design is made from 400Hz and up.

 

RE: And these would be for a 45/2A3 in a high mid/Tweeter amp?, posted on April 26, 2024 at 06:11:57
Chip647
Audiophile

Posts: 2700
Location: The South
Joined: December 24, 2012
 What operating point would you be running the 75tl?

 

RE: And these would be for a 45/2A3 in a high mid/Tweeter amp?, posted on April 26, 2024 at 12:12:01
thermionic addictions
Audiophile

Posts: 895
Joined: June 16, 2006
 Around 600V @ 40mA

 

RE: And these would be for a 45/2A3 in a high mid/Tweeter amp?, posted on April 29, 2024 at 08:31:38
Chip647
Audiophile

Posts: 2700
Location: The South
Joined: December 24, 2012
 0.04 * 600 = 24 watts (75 watt max for he 75tl)

With the 75tl you could consider doubling the plate voltage to 1200 volts. As it is, running a 75tl at 1/3 dissipation is way down in the curves. The tube will have less distortion if you can bring up its operating point and it will make more that the 6 to 8 watts this operating point will give you.

I know there is the whole "cheap 300b" operating point for the 75tl, but these tubes are getting more rare and a JJ 300b is cheaper than the Eimac now. I do understand the fun of using the Eimac tubes, having both a 304tl amp and a 35t amp in operation at the present (both in the +Kilovolt range).

 

RE: And these would be for a 45/2A3 in a high mid/Tweeter amp?, posted on May 11, 2024 at 12:34:01
Best audiotransformers
Industry Professional

Posts: 99
Joined: December 4, 2023
 '

 

are you offering to sell transformers?, posted on May 15, 2024 at 07:35:06
Tre'
Industry Professional

Posts: 17618
Location: So. Cal.
Joined: February 9, 2002
 That's what the Audio Asylum Trader is for.

No selling in the forums.

Tre'
Have Fun and Enjoy the Music
"Still Working the Problem"

 

RE: And these would be for a 45/2A3 in a high mid/Tweeter amp?, posted on August 20, 2024 at 23:05:33
tube wrangler
Manufacturer

Posts: 2487
Location: USA
Joined: January 29, 2007
 Is your 35T SE or push-pull?

Do you have a schematic of it?

The 35T is very symmetrical and should sound really good.

How to handle the high amp-factor is the question.

Thanks! -Dennis-

 

RE: And these would be for a 45/2A3 in a high mid/Tweeter amp?, posted on August 22, 2024 at 11:50:08
Best audiotransformers
Industry Professional

Posts: 99
Joined: December 4, 2023
 '

 

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