Aries AR-315
Balanced Modulator

Aries modules were available both as kits and factory modules.  This module sold in 1975 for $39.50 in kit or $79.00 assembled and raised in 1977 to $68.00 in kit or $121.00 assembled.   The module includes a 4 jack patch panel and two uncommitted attenuators.

 

Aries AR-315 Documentation (compliments of Mark Glinsky)

 

This is a pretty simple design and both sides of the PCB are easily accessible.

 

The PCB is a single sided tin with no solder mask.  Care is required when doing repairs as the pads do lift easily.

 

The AR-315 can handle signals up to +/-10V. Here it is modulating a sine with a lower frequency triangle.

 

Calibration is straightforward. This is the adjustment of the X null which doesn't quite zero out.

 

This is the adjustment of the Y null which does zero out.

 

The other two adjustments are offset and gain which are set with a DMM.

 

 

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