optimum wiring for UCR 100 receiver

[berniebeaudry]

Any Lectro UCR 100 users in the group? I'm rewiring four receiver to mixer cables to use with a Sound Devices 442. I want to make sure I'm doing it the best way. Need to finish up this weekend. Your help is appreciated!
Bernie

 

[AwakenedFilms]

Bernie, I have a couple of 100 series lectros. I created TA5F to XLR cables for line level input:

Signal Hot to pin 5, Signal Gnd to pin 1, pin 4 jumped to pin 1, and pin 3 jumped to pin 1. This gives a 40dB attenuator that allows signal levels much higher than 3V to be applied without limiting.

If more headroom is needed, insert a 100k resistor in series with pin 5. Put this resistor inside the TA5F connector to minimize noise pickup.

If lower than normal line levels (less than 1V) are expected, use this hookup: Signal Hot to pin 5, Signal Gnd to pin 1, and pin 4 jumpered to pin 1. This provides a 20dB attenuator allowing signals as high as 3V to be applied without limiting.

I have had good results with the first scenario as outlined above: hot to 5 / ground to 1, 3 and 4.



As for Line level output you can wire the MC100XLR for line level output or MC55 for mic level output. I wired an MC100XLR type cable:

Mini-plug sleeve (cable shield) to XLR pins 1 and 3. Mini-plug tip (cable center conductor) to XLR pin 2 through a 4.64 kohm resistor. 100 ohm resistor from XLR pin 1 to 2.


Check out: http://www.gnarlywireless.com/product_accessories/PDFs/mc100xlr_cable.pdf


Jason

 

[berniebeaudry]

Bernie, I have a couple of 100 series lectros. I created TA5F to XLR cables for line level input:

Signal Hot to pin 5, Signal Gnd to pin 1, pin 4 jumped to pin 1, and pin 3 jumped to pin 1. This gives a 40dB attenuator that allows signal levels much higher than 3V to be applied without limiting.

If more headroom is needed, insert a 100k resistor in series with pin 5. Put this resistor inside the TA5F connector to minimize noise pickup.

If lower than normal line levels (less than 1V) are expected, use this hookup: Signal Hot to pin 5, Signal Gnd to pin 1, and pin 4 jumpered to pin 1. This provides a 20dB attenuator allowing signals as high as 3V to be applied without limiting.

I have had good results with the first scenario as outlined above: hot to 5 / ground to 1, 3 and 4.



As for Line level output you can wire the MC100XLR for line level output or MC55 for mic level output. I wired an MC100XLR type cable:

Mini-plug sleeve (cable shield) to XLR pins 1 and 3. Mini-plug tip (cable center conductor) to XLR pin 2 through a 4.64 kohm resistor. 100 ohm resistor from XLR pin 1 to 2.


Check out: http://www.gnarlywireless.com/product_accessories/PDFs/mc100xlr_cable.pdf


Jason

I'm familiar with that link and I have a sample cable that has the configuration with the 4.64K resistor and 100 ohm resistor. I tried it mic into the 442 and I had to turn the trim way up to get enough gain. Line level in didn't have enough gain. The previous wiring was shield jumpered to pins one and three at the xlr with pin two to tip and shield to sleeve. Is this a good option? If I do use components would a 4.7k ohm resistor be close enough? That's all I can find on the weekend.
Thanks for your help!
Bernie