[francisdemarte]

I still use the EF5 as my main amp, I think its very underrated on head fi. The first thing I did when I got the amp was to remove all the plexi parts. They just get in the way of tube and op amp rolling, especially the tube. The trick I use to is to actually "roll" the tube in and out of the socket. I move it in a circle (I do it counter clockwise as I push the tube in or pull it out) it will help seat all the pins. 
 
I notice a slight channel imbalance on very low volumes with the small alps pot. I have other amps with the same volume pot that have the same issues so I think it's just they way the smaller Alps pots are. I was also planning on upgrading to the full size Alps but never got around to it.

 

[Starburp701]

I still use the EF5 as my main amp, I think its very underrated on head fi. The first thing I did when I got the amp was to remove all the plexi parts. They just get in the way of tube and op amp rolling, especially the tube. The trick I use to is to actually "roll" the tube in and out of the socket. I move it in a circle (I do it counter clockwise as I push the tube in or pull it out) it will help seat all the pins. 

I notice a slight channel imbalance on very low volumes with the small alps pot. I have other amps with the same volume pot that have the same issues so I think it's just they way the smaller Alps pots are. I was also planning on upgrading to the full size Alps but never got around to it.

I just finished installing a new socket. This makes me sooooo happy.

I'm also in the process of installing the alps blue pot. I'll let you know hoe everythiNG goes when I'm finished!

 

[Starburp701]

Well, I got the tube working which was the hard part... but the blue light doesn't come on and im not getting sound

 

[francisdemarte]

Make sure your soldier joints are clean and your not bridging any other component. Take a picture and post it up here.

 

[Starburp701]

Make sure your soldier joints are clean and your not bridging any other component. Take a picture and post it up here.

Honestly, this project is my first DIY and a nightmare. The copper pads that connect the pins to the pcb came off when I desoldered the original socket and It made everything quite difficult. I ended up just desoldering the new socket and bought a conductive pen to HOPEFULLY fix the traces. It's consumin more of my time than it should and im not really getting anywhere.

 

[francisdemarte]

That doesn't sound promising. Good luck on the repair and let us know how it goes!

 

[daehd]

Hello Has anyone tried using an e80cc tube ( double current consumption ) with a hifiman ef-5? Thanks

I'll try 2 tubes with golden feet (Phillips
warm sound ) and silver feet (Hungarian production Siemens label more aggressive sound )

 

[jaxz]

Hello Has anyone tried using an e80cc tube ( double current consumption ) with a hifiman ef-5? Thanks

I'll try 2 tubes with golden feet (Phillips
warm sound ) and silver feet (Hungarian production Siemens label more aggressive sound )

Hello! Back in 2014 I asked Hifiman about changing AU7 tube with other variants from 12AU. They said it's ok but distortion may increase:

I've been enjoying this great amp for 9 nine years now and it's been a wonderful peace on equipment. I change volpot for an ALPS potentiometer and also changed the opamp for a Burson V5i dual.

Cheers!

 

[daehd]

thanks
my remake ALPS potentiometer



my tube e80cc

how many Burson V5i dual did you buy?

2 x

 

[daehd]

 

[jaxz]

thanks
my remake ALPS potentiometer



my tube e80cc

how many Burson V5i dual did you buy?

2 x

One Burson V5i (wich is dual)

 

[jaxz]

My take on the volpot exchange:

 

[daehd]

One dual Burson V5i >>> Thanks
very nice photos, thank you
But nothing works without a drill .. potentiometer has different diameters and and ..
you have to have tools at home
Maybe my photos and film will help too

 

[daehd]

MATSUSHITA ecc82 12AU7 Made in Japan ( Mullard ?? ) with hifiman ef5​

just testing with ( Hifiman HE-5 orthodynamic headphones )
https://www.headfonia.com/hifiman-he-5-first-impression/

very very nice tube
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