That also applies to - In.
When the bottoms of those resistors are not connected to audio ground you will not hear much.
When the bottoms of those resistors are not connected to audio ground you will not hear much.
It is just that the cartridge should not be connected to ground so :
Red goes into +In , green goes into -In of one channel.
White goes into +In, blue goes into -In of the other channel.
Neither green, nor blue should be connected to ground.
Only the shield should be connected to ground. That is earth from the TT ( provided that green and blue are not connected to TT earth ) and audio ground.
Ground is just a reference here but does not cary an audio signal. That is the nature of balanced.
Red goes into +In , green goes into -In of one channel.
White goes into +In, blue goes into -In of the other channel.
Neither green, nor blue should be connected to ground.
Only the shield should be connected to ground. That is earth from the TT ( provided that green and blue are not connected to TT earth ) and audio ground.
Ground is just a reference here but does not cary an audio signal. That is the nature of balanced.
Do you measure current over the 570 Ohm resistors and is the upper resistor connected to the BC160 and the resistor from minus to the BC140 ?
Joachim works fine🙂 only with a lot of noise of LMs, do you have a specific regulator for this pre-pre?
Try a cap multiplier after the LMs like the Keantoken.
The Kentoken has quite big pass transistors that are not necessary here. BD139-140 will do.
Another quick fix is 100 Ohm resistors from the LMs and each polarity and channel, so 4 resistors in total.
Then locally 1000uF plus 1uF foil to ground.
The Kentoken has quite big pass transistors that are not necessary here. BD139-140 will do.
Another quick fix is 100 Ohm resistors from the LMs and each polarity and channel, so 4 resistors in total.
Then locally 1000uF plus 1uF foil to ground.
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I will post a schematic for a floating version. As i told you this stage works with one floating voltage only.
That was not correct english, it works with floating but also with plus-minus supply.
I prefer floating though. No ground contamination and theoretical less distortion because of Kirchhoffs law.
I prefer floating though. No ground contamination and theoretical less distortion because of Kirchhoffs law.
Quick fix like attached pic?
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