On 1 Nov 2015 at 13:07, WA5CAB--- via ARC5 wrote: > The modulation transformer in the MD-7/ARC-5 has three output windings, > 1625 plates, 1625 screens and voice sidetone. Modulating only the 1625 plates > will lead to distortion. Another example of people modifying things that they > don't understand. Absolutely!!!! :-( Ken W7EKB