Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › Little Dot I+ Tube Rolling
New Posts  All Forums:Forum Nav:

Little Dot I+ Tube Rolling - Page 131

post #1951 of 1953
Quote:
Originally Posted by forestitalia View Post
 

I'm using cv138 setting for the first time, the right channell is much more loud than the left, even if I invert the valves.

Any suggestion? It could be balanced?

 

 

It could be that one of the jumpers is defective.

 

There is a way to check this. The EF91/92 jumper for each socket simply connects pin 7 to pin 5. That is, it connects Grid 3 (pin7) to the Plate (pin 5).

 

To test this, you can easily make this connection in the socket. Put your LD back into EF95 mode. (I am assuming that EF95 has been working fine). Looking down on your sockets, the pinholes are counted counter-clockwise, starting with the pinhole to the right of the gap. Therefore, pinhole 7 is the last pinhole to the left of the gap. Cut two small pieces of 26 (or smaller) gauge stranded wire just long enough to allow one end to be inserted into pinhole 7 and the other into pinhole 5. Strip the ends of the insulation off both ends and then carefully insert these wires into the pinholes in both sockets. Next, carefully insert the tubes. Having done this, you have tied pin 7 to pin 5 in the socket which is exactly what the EF91/92 jumper was designed to do.

 

If you feel comfortable doing this, I suggest you give it a try and see what happens.

 

Good luck

post #1952 of 1953

Thanks a lot, I going to try.

 

Meanwhile I investigate and found that last owner used cv131 with the 6JI settings! (thats why was not happy thought)

could have damaged the amp?

post #1953 of 1953
Quote:
Originally Posted by forestitalia View Post
 

Thanks a lot, I going to try.

 

Meanwhile I investigate and found that last owner used cv131 with the 6JI settings! (thats why was not happy thought)

could have damaged the amp?

 

No, running EF91/92 tubes in the EF95 setting should not cause any damage to the amp. But the tubes might not sound very good.

New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Headphone Amps (full-size)
Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › Little Dot I+ Tube Rolling