February – 2015 – Dorrough DAP 310

Damaged Barrier Strip

February 27, 2015Mike Phillips Leave a Comment

The ground screw of the input/output barrier strip on a 310 that I’m refurbishing had a seized thread that caused someone to twist the head off. After a little research, I found that the Cinch 5-140-Y barrier strip is an… Continue Reading →

The DAP 310

February 27, 2015Mike Phillips 18 Comments

The Dorrough Discriminate Audio Processor Model 310 revolutionized radio processing. After its release in 1973, about 9,000 units were sold. AM and FM radio enjoyed a new fidelity that it had never seen before. The DAP inspired a lot of… Continue Reading →