Tubes amp

[squalle 0]

kross: are you building SOHA?

 

[kross 0]

no...buiding the hybrid now...successful then i move on to SOHA

y??

[squalle 0]

SOHA is also hybrid tube and solid state headphone amp

 

so which hybrid r u talking about? the one by sijosae? using 6922?

 

EDIT: i'm trying to help you troubleshoot as you've mentioned after u took it off breadboard and solder up everything it doesnt work anymore

Edited January 4, 2006 by squalle

[Kippei 0]

http://www.anatekcorp.com/qdmmvom.htm

[Kippei 0]

Regrading the DaBlock..

 

What this line means

 

Note that the outer sleeves of the caps are at mains potential so if possible, try to shield them away from other components, chassis as well. If possible, use some shielding tape to properly insulate them

[squalle 0]

http://www.uoguelph.ca/~antoon/gadgets/mostest.htm

 

besides testing BJT, MOSFET is in the article above

 

kippei: i'm not sure either. maybe due to the capacitor construction, one of the 2 leads is connected to the sleeve, hence the mains voltage

gotta try it later on when I've got around to do it

[kross 0]

SOHA is also hybrid tube and solid state headphone amp

 

so which hybrid r u talking about? the one by sijosae? using 6922?

 

EDIT: i'm trying to help you troubleshoot as you've mentioned after u took it off breadboard and solder up everything it doesnt work anymore

sure no problem. please provide whatever suggestions you have. i am doing the sijosae hybrid amp. using eh 6922. now after successfully testing it out on the breadboard, i atempted to solder it onto a stipboard by p2p. however, after a few hours of tedious solder, apparent all came to naut... . well, i guess the fatigue made me misorientate the transistors such that they shorted or wat, i am not sure.

 

so i desoldered everthing and try to put them back onto the breadboard, thinking that my p2p sucks. but still no sound. so now i guess that i might have shorted some of the transistors, just dunno which one. the 6922 i think should be still alive cos i feed ~6V into it the filament still can glow. anyway, i have bought a new set of transistors and parts as well as drew a pcb. if can get the pcb done i might save myself some trouble. if not i might need to p2p again..

 

any suggestions on what the problem is? and any idea how to check whether the transistors are alive? (the 6922 also)

[huangyong 0]

tube very diff to spolt under low voltage.

[squalle 0]

abt how to chk transistors (BJTs): http://www.anatekcorp.com/qdmmvom.htm

 

chking MOSFETs : http://www.uoguelph.ca/~antoon/gadgets/mostest.htm

 

tube wont spoil easily, concur that too

especially when u only put 24 volts across it

it's meant to operate into the hundreds of volts

[Kippei 0]

Today i go in search of my ultimate trafo

[squalle 0]

what about case?

 

The last time I chked the link (farnell) given by you, that particular case is OOS

[Kippei 0]

Farnell stuff everything OOS one la... My PPA is using that case..

[squalle 0]

oh, you can still order but gotta wait or something?

 

coz there was a time, when I need to order things that are related to my work, then they called me back saying that they're OOS,and wont bring in anymore. so yeah, I'm worried abt that

and true, a lot of things searched and came out OOS.

[Kippei 0]

hammond case they will bring one. Coz it wont change spec over time

[kross 0]

glad to hear that the tubes don't spoil easily.

as for casing, i am using wooden casing once i complete the amp. looks not bad. $2 each, that is if you guys don't mind the wooden look.