EF95-EL84 single end integrated amplifier - Page 2 - diyAudio
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Old 6th March 2010, 12:45 AM   #11
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Quote:
Originally Posted by planet10 View Post
That makes sense. The way that it was worded in an earlier post it seemed you were running them triode, but you must have meant the EF95. My diy amps use triode strapped EF86

dave
Hi dave,

You are right. EL84 in pentode and EF95 in triode. If EL84 is in triode connection, the power output is 2W only.

Thanks,
Tony.
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Old 6th March 2010, 01:11 AM   #12
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Already revised the description.
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Old 6th March 2010, 03:17 AM   #13
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EF95 is a low noise voltage amplifying indirect heat pentode. It can be directly replaced by 5654, 6AK5, CV850, Western Electric 403B, Chinese 6J1, etc. The prices of some of those tubes are very low.
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Old 6th March 2010, 03:33 AM   #14
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I like to make use of some nice and cheap tubes to build amplifiers. Sound may be surprised. EF95 is a successful case.
Other tubes I'm interested are EF91, EF80, CV1503, CV4043, PCL86, EL86, 6AG6...
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Old 8th March 2010, 04:35 AM   #15
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Same circuit as EF95-EL84SE, EF95-6V6SE with power output 4.5W is another mini tube amplifier and good for Mark Audio CHR-70 and Alpair 7 full rangers.

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Last edited by Musik007; 3rd May 2010 at 09:59 AM.
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Old 9th March 2010, 03:00 PM   #16
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The power transformer is 120VA and the choke is 20VA 10H/150mA.
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Old 9th March 2010, 03:07 PM   #17
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The output transformers we used for this EL84 and 6V6 single end amp:
Primary impedance: 5K ohms
Secondary impedance: 4 & 8 ohms
Size: 66 x 33
Frequency range: 30Hz-20KHz.
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Old 9th March 2010, 03:16 PM   #18
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Transformers for our EL84SE and 6V6SE:

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Old 20th March 2010, 04:31 PM   #19
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The simple circuit of EL95-EL84 single end is very important.

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Last edited by Musik007; 20th March 2010 at 04:44 PM.
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Old 20th March 2010, 04:46 PM   #20
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Vintage Cornell Dubilier 270uF/420VDC high voltage electrolytic capacitors (made in USA) and the 10H/150mA choke work as CLC filtering for the power.

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