21:49

10M Linear Amplifier - Part 1

26:22

How Bad Did Ancient Speakers Sound?.

15:01

3cx3000 RF Deck.

19:57

Let’s Build a Low Voltage Vacuum Tube Audio Amplifier

17:54

VHF 2 Meter 829B Push Pull Class-C Vacuum Tube Amplifier

17:21

Shortwave Aust Latest Developments

10:08

Mijn Film 1

4:57

My 1st Homemade Hf amp. 1kw+ from 1X 3-500Z tube 160 through 10