Finished up my EHHA Rev A along with some modifications which yields great results.    1) If you prefer punchier, deeper bass and a more full bodied sound, consider swapping the 2200uF caps in the power supply to 4700uF. I uses a pair of Rifa 4700uF 63V on each power supply to...

Finished up my EHHA Rev A along with some modifications which yields great results.    1) If you prefer punchier, deeper bass and a more full bodied sound, consider swapping the 2200uF caps in the power supply to 4700uF. I uses a pair of Rifa 4700uF 63V on each power supply to excellent...

Thanks jk,   yup i have read a few times on the wiring page. will try a few configuration to see which works for me.    But in all the midst of excitement, i forgot to include my potentiometer. I guess 2 case balanced idea is hard to pull off.  

  Hi all, Will like to seek some opinions on wiring up my EHHA.   Basically i am going for balanced set up. but i am going for "Dual Mono" balanced set up with 2 cases.    Each case will house 1 x Transformer, 2 X EHHA Rev A boards and 2 X E12 circuit. The idea is that if i need single...

is this a ground loop breaker between PS ground and amp ground?   Quote:

thanks sachu. may I know which transistor socket are you using?   and where did you source your toshiba from? are those from ebay trustable?

can we use 2SC2238/2SA968?   i quite like the sound when used in my jisbos

the main reason why i suggested copper cause its closer to how a real pyramid will look. i not so concerned with heat dissipation as i assume the sides of the pyramid will be big enough to handle those heat.  

my 2 cents:   you can make the pyramid out of copper. the 4 sides will serve as heatsink for the 4 b22, bottom can be used for the 2 sigma22. in order to avoid drilling holes and spoiling the look, you can make use of thermal tape/thermal adhesives to tape/glue the mosfets onto the plates...

  i have the same thought, just that i was thinking of socketing a trimmer. when i found the value i like, i will replace the trimmer with a resistor. Cheaper this way i think  

was going through EHHA build thread, looking at information for a planned 3 channel active ground build, thinking that a unity gain is required.   then i saw this interesting post by runeight  ...

i like this!! reminds me of plants vs zombie.    care to share how its done?   Quote:

seems like custom is the way to go   Quote:

Thanks for the quick reply. Seems like i have to import some transformer into Singapore. Those available in Farnell Newark are seriously over spec.   this the closest i can find   Transformer,toroidal,160VA,0-230V pri 50/60Hz,2x0-30V sec   output current is 2.67A. I suppose this is...

for transformer requirements are we looking at   120/240 primary, 2x 30V secondary @ 500mA and 2 x 7V at 500mA?