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Kippei

Tubes amp

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ya..tat's how a fast recovery diode works...the physics behind it is chiem

u guys making the SOHA pcb diy or ask those manufacturers make? count me in too if not too ex. i can help to draw the layout if need to (and not too complicated).

 

1bit, i did the MHHA.

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i know kippei and squalle is building the SOHA, how about kross and huangyong?

Just a bit of correction. Squalle has finished his SOHA and is already working on a second one, which incidentally... ahem.. would be mine. wink.giftongue.gif

 

Anyway I'm no DIYer but i can say after testing the SOHA that it sounds wonderful with my MS-1. There seems to be some kind of bass boost to the signal. Seperation is good and overall, the music sounds more engaging. smile.gif

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anybody built the multi-hybrid amp already?

i know kippei and squalle is building the SOHA, how about kross and huangyong?

had built one SMHA quite sometime ago. now working on all tube MJ

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2nd SOHA is declared as done, properly running

 

now listening thru it smile.gif

 

oh btw, I managed to squeeze the space taken down to 3" * 4"

a lot more tidy this time

 

but for my own unit, I think I'll just leave it as is tongue.gif

 

oh yea, how to make the stupid volume pot immune to interference?

I've shieleded or twisted all signal wires, but I think that pot was the culprit that caught the interference when I put a fluorescent desk lamp very near

 

but all in all, it's more immune to interference compared to my 1st unit

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2nd SOHA is declared as done, properly running

 

now listening thru it smile.gif

 

oh btw, I managed to squeeze the space taken down to 3" * 4"

a lot more tidy this time

 

but for my own unit, I think I'll just leave it as is tongue.gif

 

oh yea, how to make the stupid volume pot immune to interference?

I've shieleded or twisted all signal wires, but I think that pot was the culprit that caught the interference when I put a fluorescent desk lamp very near

 

but all in all, it's more immune to interference compared to my 1st unit

Tied the cover to the ground. Just like my PPA. The whole alps is tied to the ground too. ... So fast i haven even started on it....

Edited by Kippei

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hahaha

 

told u to get perf board instead

 

come over and I'll help you using similar layout as this one

3 by 4 if the trafo is off the board smile.gif

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i didn't twist the tube signal wires because i left them very short. but the main culprit is the cheapo vol pot. i jus avoid using them at the max or the min. at the middle range it is quite ok, no FM interference or humming.

 

Kippei, you mean u type the whole casing to main earth? hmm... my psu output only has +/-, don't have ground.

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yup, that i did and it removed the buzzing when my fingers touch the pot. but i still suspect that the quality of the vol pot mightstill be the culprit here, causing the FM interfernece when I turn the pot to max. mabye next time i should get better quality vol pots. too bad this time budget too low. Would rather spent on better caps instead. tongue.gif

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My real blue alps does the same thing too. So u roughly guess

??what do you mean does the same thing? can't guess what you meant.

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I means it doesnt matter it is a good or low quality. My alps is quite good in the sense also got buzzing. So can conclude, pot quality is not a main factor of the buzz

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