Head-Fi.org › Forums › Equipment Forums › Headphone Amps (full-size) › Little DOT MK III Mods??
New Posts  All Forums:Forum Nav:

Little DOT MK III Mods?? - Page 8

post #106 of 113
5/10/11 at 8:40am
Quote:
Originally Posted by SebastianL View Post

Yeah, but the strange thing is that if a component is missing and not replaced with a wire there should be a break in the signal path = no sound (for that channel). On the photo it looks as if some of the solder joints of the resistors have been tampered with. Did you buy it second hand?

 

I bought it from David on eBay. Amp was shipped directly from China. I have never made any modifications to the circuit board myself. Many solder joints (most of them actually) do look messy.

 

 

Reply
post #107 of 113
5/16/11 at 8:25am

My board is the same version as your's sonda. And mine has just one cap too. Whereas the boad is printed for two capacitors. I'm pretty sure this is related to the power supply end of things. I was under the impression this difference between the v1.0 and v2.0 boards had to do with the 6H30PI compatibilitiy. I could be mistaken though.


Edited by KMASCII - 5/16/11 at 8:27am
Reply
post #108 of 113
5/18/11 at 12:01am
Quote:
Originally Posted by KMASCII View Post

 I'm pretty sure this is related to the power supply end of things.


It makes sense.

 

Reply
post #109 of 113
6/9/11 at 10:58pm

Is there any room for improvement on my adapters?

http://www.head-fi.org/forum/thread/301219/review-of-the-diy-6h6n-to-e182cc-5687-tube-adapters-bullplugs-for-ld-mkii-mkiii-headphone-amplifiers/45#post_7527150

Reply
post #110 of 113
6/13/11 at 6:25pm

Would it be possible to substitute WIMA 0.68uF 160V with the Russian K42Y-2 0.47uF 250V PIO cap?

Reply
post #111 of 113
12/12/11 at 2:00pm

Project frankenstein. Hopefully I'll be able to close the chassis ;)

 

DSC08139.JPG

Reply
post #112 of 113
1/30/12 at 6:46pm

I've had my MK III about 5  years. I use it more as an additional preamp than a headphone amp with my home stereo and especially with a  modified " JBL On stage 400"  ipod speaker(used as a tv speaker for my cable box which does a great job considering it's small size)  . The only mod I've done is parallel a pair of .22uf Audio Cap Thetas to the Eros .22 caps and .68 Auricaps to the Wima .68 caps and it certainly helped clean up the sound and make it a bit more dynamic.

 


Edited by twc5964 - 2/7/12 at 5:45pm
Reply
post #113 of 113
4/16/12 at 12:15pm

Yes, and although the WIMA caps are a decent sounding cap, they were sounding just a bit grainy to me. Once I swapped the WIMAs for Auricaps & Obbligatos the treble became more controlled and cleaner.

 

As a side note, I haven't come across an answer as to whether these output caps are in series or parallel. By the circuit board tracings they look like they're in series, but I don't know for sure.

 

LDMKIIICaps.jpg

Reply
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 MK III Mods??