https://wedophones.com/TheBellSystem/pdf/bsp/coquette/503-200-110-dec1975.pdf

This BSP for a typical Design Line set shows that the guts are typical 500-type and that it's possible to convert the set to A-lead control.

Paul Fassbender's comprehensive WE site:

https://paul-f.com/weDesignLine.html

has the BSP's listed for each Design Line set. "wedophones.com" has the BSP's in pdf form.

Maybe we can get you set up without needing the adapter...just sayin'.


Arthur P. Bloom
"30 years of faithful service...15 years on hold"