The inside of a Heathkit HW-101 is too interesting not to photograph
List of tubes and their function used in the HW-101
OA2 Regulator (150 V).
6HS6 RF amplifier.
6HS6 1st receiver mixer.
6AU6 Isolation amplifier.
6AU6 1st IF amplifier.
6AU6 2nd IF amplifier.
6BN8 Product detector and AVC.
6AU6 VFO Amplifier.
6CB6 2nd transmitter mixer.
6EA8 Speech Amplifier and cathode follower.
6EA8 1st transmitter mixer.
6EA8 2nd receiver mixer and relay amplifier.
6EA8 CW side-tone oscillator and amplifier.
6GW8 Audio amplifier and audio output.
12AT7 Heterodyne oscillator and cathode follower.
12AT7 VOX amplifier and calibrator oscillator.
12AU7 Sideband oscillator.
6146 Final amplifiers (2).
Video with CW QSO
Brief video ending with WES exchange CW QSO. Listen to the old girl in action...
Great resource for information on tubes and old radio design...
That's all for now