Hytron 2E25 - Other forgotten and marvelous tube ! - diyAudio
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Old 26th June 2013, 10:39 PM   #1
aldovan is offline aldovan  Brazil
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Join Date: Jul 2005
Location: Curitiba
Default Hytron 2E25 - Other forgotten and marvelous tube !

Friends

Today I build a circuit with a E180F in triode mode in the input and a Hytron 2E25 in triode mode, single ended in output.
For the test I use a 3K output transformer( not the ideal) and a Utah D8LA full range as speaker, only. No tweeters and others speakers.
The 2E25 is a unknown quick heating transmitter tetrode from 40's and very cheap in this days.
Your sound is fabulous and a good option for a good and low cost hifi amplifier project.
The output is about 3 to 4W, but with the Utah high SPL speaker is fine for my small room.
Sorry for my ridiculous English...he,he...
http://www.youtube.com/edit?video_id=6wDZ000VEeA&ns=1


Aldovan
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Old 27th June 2013, 02:16 AM   #2
tcqanh is offline tcqanh  Viet Nam
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Join Date: Apr 2011
Location: HoChiMinh city
I did Mullard E180f in triode- IT- Tungsol 2E22 . Sound is so sweet.

2E24 is good tube. You can try 2E22 to get more power and more magic

Can you post your schema ?
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Old 27th June 2013, 05:34 AM   #3
aldovan is offline aldovan  Brazil
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Join Date: Jul 2005
Location: Curitiba
Quote:
Originally Posted by tcqanh View Post
I did Mullard E180f in triode- IT- Tungsol 2E22 . Sound is so sweet.

2E24 is good tube. You can try 2E22 to get more power and more magic

Can you post your schema ?
In my project I use the 2E25, not the 2E24...the 2E25 is a transmitter tetrode.
I never listen a 2E24.

Aldovan
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Old 28th June 2013, 12:56 AM   #4
tcqanh is offline tcqanh  Viet Nam
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Join Date: Apr 2011
Location: HoChiMinh city
Sorry for my mistake.

2E24 is direct heated penthode http://frank.pocnet.net/sheets/049/2/2E24.pdf. You can regard it in future.
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Old 28th June 2013, 03:59 AM   #5
aldovan is offline aldovan  Brazil
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Join Date: Jul 2005
Location: Curitiba
Default 2E24 is a pentode...not tetrode...

Quote:
Originally Posted by tcqanh View Post
Sorry for my mistake.

2E24 is direct heated penthode http://frank.pocnet.net/sheets/049/2/2E24.pdf. You can regard it in future.
Yes, but the 2E24 is a 10W plate pentode and the 2E25 is a 15W tetrode...more power and best sound quality.

Aldovan
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