Thank's all..
speaker cable is cat 5
audio is silver wire in silk sheath
power cable is made CAT5E shielded and cotton sheath
Amp is in the office, it does not move and before the cotton sheath is damaged, peace will reign over all the earth.
Then there will be damaging to the metal sheath.
About earthing, it's my choise, but I said : never do like me !
Always connect earth to the case.
Phil.
speaker cable is cat 5
audio is silver wire in silk sheath
power cable is made CAT5E shielded and cotton sheath
Amp is in the office, it does not move and before the cotton sheath is damaged, peace will reign over all the earth.
Then there will be damaging to the metal sheath.
About earthing, it's my choise, but I said : never do like me !
Always connect earth to the case.
Phil.
When I got this mail:
" Dear Pjotter,
AndrewT has just replied to a thread you have subscribed to entitled - Chip Amp Photo Gallery - in the Chip Amps forum of diyAudio."
I expected a whole different message.. [emoji2]
Hahaha
... Well, as long as the case is metal and connected as chassis ground, maybe.
Purists might shield all signal connections between boards and I/O. Shields connected on one end would do it, to avoid a lot of ground loops.
I build with plastic cases and thus of necessity shield all I/O and interconnects, of course, but best practices might suggest shielding on any and all "line level" signals.
Further: http://en.wikipedia.org/wiki/Ground_loop_(electricity)
These images are not balanced cables. [AndrewT: "DO NOT break the signal return of a close coupled pair. NEVER !"]
But, sometimes one must experiment and find out what works on a particular design ... I generally connect the balanced, twisted pair, audio shield to chassis ground at one end only (usually the source end), then occasionally add a small capacitor, shield to chassis ground, at the other end (to bleed off any stray AC).
"Your results may vary ..."
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Hi,
New LM3886 at home !
Kit from Chipamp, ps (27 volts) with snubber, one safety loop breaker per side, direct input (no cap, no resistor), gain is 28, one output for bass amp..
Great sonics !!
Special thank's for Andrew T, Mark Whitney and Chipamp.
Phil.
New LM3886 at home !
Kit from Chipamp, ps (27 volts) with snubber, one safety loop breaker per side, direct input (no cap, no resistor), gain is 28, one output for bass amp..
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Great sonics !!
Special thank's for Andrew T, Mark Whitney and Chipamp.
Phil.
Hi Pjotter,
Yes it's silver wiring with natural silk sheath.
About grounding, it's safety loop breaker, see figure 4 :
Earthing (Grounding) Your Hi-Fi - Tricks and Techniques
and schematic from Mark for dual ps :
http://www.diyaudio.com/forums/chip-amps/262633-one-two-transformers-4.html#post4098151
I have not build thread here..
Pcb and few componants are ordered from Chipamp, schematic are the same :
http://chipamp.com/docs/lm3886-manual.pdf
except : remove R1, R3 1 Ko and Rf 27 Ko, add 220 pF between pin 9 and 10, power suply is fig 1.3 (one per side).
Phil.
Yes it's silver wiring with natural silk sheath.
About grounding, it's safety loop breaker, see figure 4 :
Earthing (Grounding) Your Hi-Fi - Tricks and Techniques
and schematic from Mark for dual ps :
http://www.diyaudio.com/forums/chip-amps/262633-one-two-transformers-4.html#post4098151
I have not build thread here..
Pcb and few componants are ordered from Chipamp, schematic are the same :
http://chipamp.com/docs/lm3886-manual.pdf
except : remove R1, R3 1 Ko and Rf 27 Ko, add 220 pF between pin 9 and 10, power suply is fig 1.3 (one per side).
Phil.
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Thanks for your reply!
Safety loop breaker, now I remember it. For some reason I didn't implement that in my amp, I'm thinking of doing so.
Thanks again!