Over the years, some users have chosen to operate their DAPs without Expander cards. Personally, I think they’re one of the greatest functions of a DAP. Apparently when those cards were removed, they were discarded. I have replicated the circuitry… Continue Reading
Over the years, I’ve managed to accumulate a few more cards than I need for repair inventory purposes. Specifically, I have several Equalizer cards for sale. They are fully restored, tested, and guaranteed. While I have some other cards as… Continue Reading
While I wasn’t looking, all major manufacturers have discontinued the 8-pin DIP plastic version of the ubiquitous LM301 op amp. When such a popular part is discontinued, there’s usually a years-long supply in multiple warehouses. I have had little luck… Continue Reading
If you have a DAP310 for repair or refurbish, please let me know. I’m now accepting repairs. Contact me by email, and I’ll provide you with my contact information. The same caveats apply: Meters, meter bezels, FETs, and several other… Continue Reading
While this site is dedicated to the Dorrough 310, of late, having seen fewer 310s come in for repair, I’ve had the opportunity to play with several 610s. The two most recent I’ve seen were actually scheduled for disposal. Thankfully… Continue Reading
This site is for the DAP310, but as you probably know, Mike and Kay Dorrough created a magnificent follow up to the 310 called a 610. A regular customer asked me to look at one for him. I’ve repaired a… Continue Reading
For some reason that escapes me, some DAP owners were able to convince themselves that the Expander boards were not needed in their units. Accordingly, there are many DAPs out there that are missing Expander boards. Owners of those boxes… Continue Reading