> >And thanks much to Russ WA4POD for reminding of the bridging transformer > >accessory, the model number of which escapes me. > David DiGiacomo wrote: > The HP 11005A ? I don't think that's the one Russ meant. The 11005 was a line-matching output transformer intended to adapt audio/LF oscillators for telecom work. Its response was only up to 40 or 50 kHz. Fred