Info Wanted: Dolby Labs Model 362 - Equaliser Filter Card

gearbot73

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I recently was given a Dolby Labs Model 362 Noise Reduction Unit. It has two slots (A & B) with two different cards currently inserted. Slot A has the common and sought after Cat No 22 card (Dolby System A-Type Noise Reduction Module). Slot B has the Equaliser Filter Card in question, labeled Cat No 105D, made in England 1978. Somebody has modded this card, soldering various jumper wires. The card has a three way switch labeled "Out / In / Auto" that is accessible from the front of the card due to the fact there is no metal faceplate on the card like the Cat 22 card. I understand this card is an Equaliser filter card but I can't find any info beyond that. I am looking for any aditional information regarding the Cat 105D card. Thanks in advance!
 
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