carpenter said:Well now, guess what was in my mailbox.
Quick as a wink, I visited the local Post Office and now have the the package on my desk.
Its contents reminds me of some of the women I've loved: beautiful, impressive, and intimidating.
There will be plenty to do this winter!
You got your insurance bill?
quote from ZenMod:
Thank's for the correction on my attenuator schm.
Well i tried to hook it up, the way you suggested, and some hum dissapeared.
look at zenmod's attennuator schm. here
I made a 'star' connection in middle of chassis (not connected to that) from that 'star' connection wires are going into these point's.
1 wire ---> pwr gnd Right channel
2 wire ---> pwr gnd Left channel
3 wire ---> signal gnd Right channel
4 wire ---> signal gnd Left channel
5 wire ---> comming from input gnd
The god thing is, that now my 4deck work's as good as my 2deck-stereo pot.
But still having that strange -in to GND problem... If i deattach the -in wire comming from attenuator, the
is dead-quiet! ... But when -in is attached to attennuator there is comming some humming... really annoying. Donno what the problem is. Seem's to me, that it's some grounding issue...
Because when -in is connected to gnd via attennuator the is becoming very sensitive.. e.g when i touch some part's you can hear it. All that dissapears when disconnecting -in... something i didn't noticed before. I must say, that i didn't try it on my F4's this testing is done with my LeachAmp, there is ofcause the possibillity that there is no humming when connected to F4... but i sure would like to solve that problem anyway.
Jesper.
Thank's for the correction on my attenuator schm.
Well i tried to hook it up, the way you suggested, and some hum dissapeared.
look at zenmod's attennuator schm. here
I made a 'star' connection in middle of chassis (not connected to that) from that 'star' connection wires are going into these point's.
1 wire ---> pwr gnd Right channel
2 wire ---> pwr gnd Left channel
3 wire ---> signal gnd Right channel
4 wire ---> signal gnd Left channel
5 wire ---> comming from input gnd
The god thing is, that now my 4deck work's as good as my 2deck-stereo pot.
But still having that strange -in to GND problem... If i deattach the -in wire comming from attenuator, the
is dead-quiet! ... But when -in is attached to attennuator there is comming some humming... really annoying. Donno what the problem is. Seem's to me, that it's some grounding issue...Because when -in is connected to gnd via attennuator the
is becoming very sensitive.. e.g when i touch some part's you can hear it. All that dissapears when disconnecting -in... something i didn't noticed before. I must say, that i didn't try it on my F4's this testing is done with my LeachAmp, there is ofcause the possibillity that there is no humming when connected to F4... but i sure would like to solve that problem anyway.Jesper.
Yep... groundloop it must be! --- but no piccie's today, cause children bring along digicam on a weekendtrip
I realise, that i did not use the 'coax shield' in coaxcable. it might be the problem.
The coax i use is a 3wire+shield cable, containing red, black, yellow. + shield.
I use the black wire as GND, red is for +connection's and yellow is -connection's. The shield connection, i just leave as it is at end of cable's... I just looked at your'e grounding schm. HERE
And see that the shield is connected at the PCB (which i didn't do so far)... this might could be it ???
Will be back when rewiring once more !
Not tonight for sure Jesper.
lykkedk said:
Yep... groundloop it must be! --- but no piccie's today, cause children bring along digicam on a weekendtrip
I realise, that i did not use the 'coax shield' in coaxcable. it might be the problem.
The coax i use is a 3wire+shield cable, containing red, black, yellow. + shield.
I use the black wire as GND, red is for +connection's and yellow is -connection's. The shield connection, i just leave as it is at end of cable's... I just looked at your'e grounding schm. HERE
And see that the shield is connected at the PCB (which i didn't do so far)... this might could be it ???
Will be back when rewiring once more !
Jesper.
if everything is wired OK - then shield is just a bonus , not necessity
lykkedk said:
If that's the case... i haven't no clue anymore... everything is connected proberly.
Will be thinking next few day's i guess... might be that i'll figure it out that way!
Thank's for helping me out ZenMod... PS: check youre mail in few minutes...
Jesper.
gimme pics .
Magura said:
Remember, snaps December 8th Jesper
Magura
whazzat now that dec. 8. ?
carpenter said:hahahahah.........look at him grin!!
So it had to be in perfect operating condition. I'd make a bet like that only if I knew we were planning to get quite intoxicated. Like ah, maybe twenty years ago.........
Well, that will be one more snaps for me...so I guess we're going to become quite intoxicated
Magura