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Hifiman EF-5 headphone amplifier mods and rolls - Page 5

post #61 of 67
Quote:
Originally Posted by inter voice View Post
 

12AV7 Sylvania?

 

Should it be 12AU7 instead.  I have tried Sylvania 12AU7 and it is very good indeed.  However I am now using RCA clear top 12AU7 which is very similar to Sylvania.

Yup, 12AV7. Works fine. No distortion. Others tubes i have or tried are:

 

Stock Full Music

Mullard CV4003

Tung-Sol 12AU7 (Reissue)

Electro-Harmonix 12AU7 (Reissue)

Pope ECC82

RCA Clear Top 12AU7

Valvo/Miniwatt 12AU7

Philips Miniwatt Holland 12AU7

Philips Miniwatt Special Quality 12AU7

Telefunken 12AT7 (no good, distortion can be heard)

GE 12AY7 (no good, distortion can be heard)

 

My favorites so far are the clear top, miniwatt holland and the sylvania 12AV7.

 

EDIT:

 

 

 


Edited by jaxz - 9/7/14 at 11:33am
post #62 of 67
Thread Starter 

Nice shots :wink:

post #63 of 67
Quote:
Originally Posted by inter voice View Post
 

Nice shots :wink:

Thank You!

post #64 of 67
Ok. I just order AD797BR and LME49990, both dual modules with an adapter. Hopefully I will get those in a couple of weeks so I can post some impressions.
post #65 of 67

i have decided to sell my EF-5 amp and will post it in the ForSale forum in the next few days. It is a great amp but I simply have too many amps. I just replaced the filter caps with Panasonics, replaced the diodes with high speed ones, replaced the RCA's with gold ones, replaced the volume control with a carbon Noble. Tubes will include a Full Music and a Raytheon black plate 12AU7 with very few hours.. Asking $275 including shipping and PayPal fee. I thought I would mention it here first in case anyone is interested before I post it. PM me if interested.

post #66 of 67
Quote:
Originally Posted by dpump View Post

i have decided to sell my EF-5 amp and will post it in the ForSale forum in the next few days. It is a great amp but I simply have too many amps. I just replaced the filter caps with Panasonics, replaced the diodes with high speed ones, replaced the RCA's with gold ones, replaced the volume control with a carbon Noble. Tubes will include a Full Music and a Raytheon black plate 12AU7 with very few hours.. Asking $275 including shipping and PayPal fee. I thought I would mention it here first in case anyone is interested before I post it. PM me if interested.

That's an extremely good deal, and I would be interested if I were not considering selling mine as well. I want to buy the Oppo HA-1 as my end game.
post #67 of 67

I tried all my tubes again with the OPA627. My favorite is the Philips/Valvo 12AU7, while Pope ECC82 (Philips Holland) come in close second place.

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