The Rogers R-32 is an early indirectly heated triode. The heater connections are the two pins on the top cap. The cathode pin was guessed to be pin 3.
By August 1925, the Rogers Batteryless radio saw its first Canadian sales. The suggestion was that it was the first wireless receiver in the world to operate from household current.
The etched lettering is: Rogers AC Tube Type R-32.
The base cap is standard UV with a side locating pin. The heater connects to a second pinch at the top of the envelope.
The base pins connect with springs at the bottom of the valve-holder and so do not need to be split to grip at the side.
The top of the anode showing the grid with a single side support and the heater connected at the top.
The vertical rod to the left of the anode cylinder is the control grid support. The individual loops of the grid are held in notches on the internal grid support.
The heater wires pass into an insulating tube within the cathode. The tabs holding the heater wires are welded to the top pinch leads.
The components at the top of the valve.
A closer view of the fixing of the grid helix to the support rod.
In December 1999, as part of its Millennium Collection, Canada Post issued a pane of four 46-cent stamps celebrating Canada's media technologies. Featured on the stamps were Imax movies, Softimage animation software, Sir William Stephenson and Rogers radio tubes.
The balloon envelope is 41 mm in diameter and, excluding the UV base pins, is 121 mm tall.
Reference: 3001. Type R-32 was first introduced in 1925. See also1925 adverts.
