Re: [Drakelist] TR-4C Filament Voltage

Bob, If you feel that the voltage are too low for you, find an old cheap 3 to 4 amp car battery charger (typically 24 volt center tapped for 12 volt battery).  Then wire the transformer with the primary on the 230 volts, and the secondary boosting that voltage.   Assume 230, plus a 12 volt

Re: [Drakelist] TR-4C Filament Voltage

Bob, Use a filament transformer with a secondary current rating equal to the full load current of the TR-4C as an autotransformer to raise the voltage. If you can find a single transformer with two five volt windings, you can use them in series to get 10 volts, or you could use two five volt

[Drakelist] TR-4C filament Voltage

Hi, Bob - I wouldn't worry much about the 230 vs 240 V difference. Back when the Drakes were made, most line voltage in the US were assumed to be 115 VAC anyway. Since 115 is half 230 you should be spot-on. (I suspect the higher voltages we now have in the US may slightly contribute to the

[Drakelist] R-4C PTO Dial Mechanism Problem

Hi All: Looking for some help on a problem with the PTO dial mechanism of a nice R-4C that I bought some years ago but never put into service. The dials do not rotate at a constant speed, although I spin the knob at a constant speed. At a certain point in the rotation the dials abruptly