never have been a cable fanatic, but todays lesson was clear : ) (being honest, i still can't believe it in that explicitness..)
just to share
Which cable you use inside the amplifier ?
Last edited:
today it´s not really about amp, its about bad source/cable.
I went to Conrad today to buy the 39R's to be able to trim the frontend right. Worked great btw! Aditionally i bought a minijack to cinch-cable (a extremly cheap one!) to replace the one in studio i stole frome home.
then, after rebiasing more subtle and istalling the cinch sockets i left out in the hurry, i went to the listening. stage, magic, was gone..i rechecked everything, thought i damaged something. i really was puzzled, but in the end had the stupid not so stupid idea to change back the cable to the first, better one, and magic was there again. It's still just laptop-cinchcable-amp, so not a good set, and never have been a cable fanatic, but todays lesson was clear : ) (being honest, i still can't believe it in that explicitness..)
just to share
speaking about interconnect cable ?
Start inside. I think ZM uses silver plated copper Mil-Spec 22 AWG M22759/11..........
Last edited:
100 feet : ), i´m open, but that's a little too much.
For IP SE i bought some predrilled black/neutal ultrathin copperwire, and i still trust in quality of laquered thin copperwire. I like that colorcoding, but now unshure if quality is good there either. Bought from Hobby store to connect LEDs in miniature Railway thingie.. : )
For IP SE i bought some predrilled black/neutal ultrathin copperwire, and i still trust in quality of laquered thin copperwire. I like that colorcoding, but now unshure if quality is good there either. Bought from Hobby store to connect LEDs in miniature Railway thingie.. : )
Yep. I think somebody bought this wire on our forum and now sells for months.
PSU
my habit - custom made Donut - always asking for decreased flux in core , which means more turns per volt than usual jobbie
300VA , separate 18Vac secondaries , one per channel
static shield , magnetic screen
filter - CRC , made of 33mF-0R1/WW/5W-33mF , per rail
yup, one Graetz bridge per secondary , so two per PSU
meaning that - when case is common , you'll have just IEC and switch shared between channels , after that NTC (CL-60 or equivalent) in series with primary and one fuse per primary
then 10-15R NTC from audio GND to chassis , safety GND of chassis is mandatory
as illustration - Papa's drawing from F6 article
EDIT: Member requested an edit to 'is mandatory'
my habit - custom made Donut - always asking for decreased flux in core , which means more turns per volt than usual jobbie
300VA , separate 18Vac secondaries , one per channel
static shield , magnetic screen
filter - CRC , made of 33mF-0R1/WW/5W-33mF , per rail
yup, one Graetz bridge per secondary , so two per PSU
meaning that - when case is common , you'll have just IEC and switch shared between channels , after that NTC (CL-60 or equivalent) in series with primary and one fuse per primary
then 10-15R NTC from audio GND to chassis , safety GND of chassis is mandatory
as illustration - Papa's drawing from F6 article
EDIT: Member requested an edit to 'is mandatory'
Attachments
Last edited by a moderator:
dear ZM with the last update to post # 1 you finally answered my incessant question "Bias procedures .... bias procedures ... BP .... beep" . now you have finally turned off the alarm that had been lit for quite some time.
Now the picture is complete .....
really .... thanks for your great work
PS=another little question .......
why not use a "soft start" instead of NTC?
Now the picture is complete .....
really .... thanks for your great work
PS=another little question .......
why not use a "soft start" instead of NTC?
Last edited:
of course you can use soft start instead of NTC ;
but - as I'm always saying - to get really soft soft start - replace all fixed series** resistors with NTCs .... no more than 30R in sum value
**some are making soft start with paralleled resistors , which is recipe for .... not exactly disaster , but certainly non-functional soft start
edit: your avatar - Giger ?
but - as I'm always saying - to get really soft soft start - replace all fixed series** resistors with NTCs .... no more than 30R in sum value
**some are making soft start with paralleled resistors , which is recipe for .... not exactly disaster , but certainly non-functional soft start
edit: your avatar - Giger ?