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Parts

August 5, 2015Mike Phillips 27 Comments

Recently I acquired a new stock of parts for the DAP 310. My inventory now includes most parts EXCEPT the meter bezels or the FETs. If you have a DAP that needs repair, let me know. Most repairs are $200… Continue Reading →

Refurb

Trimmer Pots

April 5, 2015Mike Phillips 1 Comment

The trimmer potentiometers on the 310 are not very robust. They are not designed to be turned many, many times. If a pot is in an audio circuit, it’s easy to hear when it is going bad. When it is… Continue Reading →

Refurb

Electroyltic Capacitors

March 17, 2015Mike Phillips 2 Comments

It’s somewhat axiomatic that replacing all electrolytic capacitors in a DAP should be the first step in a refurb. They’re about 43 years old, and they deteriorate over time. Axial capacitors are still available, but they’re getting expensive, and the… Continue Reading →

Refurb

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 →

Refurb

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 →

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