It has a screw terminal strip on the back of the chassis labeled : ground, L2, L1, (L1 & L2 connected by a resistor), and L2, L1, (with no resistor) I want to make XLR connections to this EQ. I think it was made around 1968. Thanks.
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It has a screw terminal strip on the back of the chassis labeled : ground, L2, L1, (L1 & L2 connected by a resistor), and L2, L1, (with no resistor) I want to make XLR connections to this EQ. I think it was made around 1968. Thanks.
- L1 & L2 are the usual "Altec-Speak" for ( + and - ) on a "balanced" ( 3-wire ) connection .
- Obviously "Ground" goes to pin 1 on the XLR type connector .
- In your case , I don't believe it'll make much difference which one you choose as your hot ( connected to pin 2 ) from your XLR connector . Just be consistent going into & coming out of this EQ with your choices .
- The resistor across L1 & L2 is a load resistor. You may need it .
- I see from your other post that this "Notch Filter" is a passive inline .
:cheers:
L1= pin 1 (neg)
L2= pin 2 (pos)
GROUND= pin 3 (shield)
If you want to use an unbalanced connection, just jumper pins 1 and 3 together:
Pins 1+3 = neg.
Pin2 = pos.
Thanks !
Yes this notch filter is passive, with 24 knobs; each knob controlling a different frequency 60HZ to 12.5 KHZ. Does it matter which set of L1 & L2's get the input or output? Is the pair of L1 & L2's connected by the resistor input or output? Any idea where to get a manual for this unit?
PS: it looks right at home next to my 1592B and 342B...