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Kenwood KR-V126R - Need Help ID'ing Impedance Switch Polarity

T

Tim

Jan 1, 1970
0
My problem is that I need to know which side is less than 8 or which
side is 8 or more. Kinda dumb I know, but I had to twist the lines
around to get at the switch, and now I am not sure which is which. One
side has yellow wires and the other has white. When the switch is moved
to one side it shorts those lines to ground thru a set of green wires.

The wires themselves go back to the power transformer (the yellow and
white ones). The green ones go to the main power board and to ground.

Thanks,

- Tim -
 
T

Tim

Jan 1, 1970
0
In addition I would like to verify the the regulator id'ed as IC12 on
the main board is supposed to be a 78M15. there has been work on this
area and it seems to be sensitive to the problem I am trying to solve. I
subbed in a 78M12 with a 1200 resistor on the ground to get 15.2 V, but
the receiver got very noisy.

- Tim -
 
T

Tim Schwartz

Jan 1, 1970
0
Tim said:
My problem is that I need to know which side is less than 8 or which
side is 8 or more. Kinda dumb I know, but I had to twist the lines
around to get at the switch, and now I am not sure which is which. One
side has yellow wires and the other has white. When the switch is moved
to one side it shorts those lines to ground thru a set of green wires.

The wires themselves go back to the power transformer (the yellow and
white ones). The green ones go to the main power board and to ground.

Thanks,

- Tim -
Hello,

In general, the 8 ohm position will be the one with higher voltage from
the transformer. All you need to do is measure the voltage on the
output of the switch, and see which position has the higher voltage on
the green wires, which you've described as the output from the switch to
the rectifier.

PLEASE NOTE: I'm assuming that your description here is accurate, and
that is not other wiring to the main power supply.

Regards,
Tim Schwartz
Bristol Electronics
 
T

Tim

Jan 1, 1970
0
Hello,

In general, the 8 ohm position will be the one with higher voltage from
the transformer. All you need to do is measure the voltage on the
output of the switch, and see which position has the higher voltage on
the green wires, which you've described as the output from the switch to
the rectifier.

PLEASE NOTE: I'm assuming that your description here is accurate, and
that is not other wiring to the main power supply.

Regards,
Tim Schwartz
Bristol Electronics
OK I measured across the green set, and one position has 90-95 and the
other 120-125, The reading fluctuates a fair amount, but there is
definatly one higher side, so I'll assume that's the 8 ohm or higher
side.

Thanks for the lesson,

- Tim -
 
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