What types of capacitors are being used in the new controller?
All audio coupling caps in the 7330 are ceramic to avoid any issues with polarization. Interstage audio coupling is done with 1 uF ceramics, and the TX audio drivers (being low-impedance) use 10 uF ceramics. All ceramic caps below 0.001 uF are NP0, and the rest are X7R. There are a few tantalums and electrolytics, and they’re used for bypassing only. Why did you use SMT (Surface Mount Technology) parts? Common SMT (Surface Mount Technology) components such as resistors, capacitors, and op amps are cheaper and smaller than their leaded counterparts, and for those reasons most of the components in the 7330 controller are SMT. And while we don’t add components to our designs just for the fun of it, in some cases we can build a more robust product by adding a few more SMT parts — parts that we wouldn’t have included in through-hole designs. For example, the S-COM 5K, 6K, 7K, and some competitive controllers use a single op amp to handle the job of receiver audio interfacing. But getting t
