30FX Transmitter

Out 1934 30FX Transmitter was owned and operated by J.B. Jenkins (W5EU), retired Collins Radio Engineer from the Richardson, TX facility.
J.B. passed away on September 20, 2017 and specified that this part of his collection be gifted to the Collins Aerospace Museum by his son-in-law Mark Reel.

A February 1935 advertisement in QST noted: “The 30FX is the ideal 1935 amateur transmitter – it is simple to adjust – its cost is low and its performance is guaranteed. Here is a Transmitter (final amplifier 211 triode) capable of putting into your antenna a full 100 watts of CW power, or a phone carrier of 40 watts – one-fourth the peak power at 100% modulation.* The highly efficient COLLINS control-grid system of modulation assures perfect speech transmission without fuss or waist of power.”
* When used as a phone a COLLINS 7X high-fidelity speech amplifier is recommended.

In November of 1934 the 30FXB was introduced improving upon 30FX by utilizing Class-B modulation instead of Grid-modulation. Doing so, the new FXB could now produce a full 100 watts on CW and Phone. The 4C Speech Amplifier was also built in.