Does anyone know how to contact Mr. Mort Denison. Does anyone know where I can find a copy of a manual for an AN/TRD-15 and 23, TM 11-5825-231-10 TM 11-5825-231-24 TM 11-5825-231-25 TM 11-5825-231-34P-1 TM 11-5825-231-34P-6 or any other manual variant for this direction finder system which used the R-725/TRD Radio Receiver. Richard Spargur K3UI