Twisted GU-72 power amplifier
Top-10
Twisted GU-72 short wave power amplifier.
Frequency range: 3,5 up to 28 MHz.
Output power: 500Watt
A shortwave amp on two GU-72 tubes, rated at 500 W out.
Specifications
- Tubes: 2 × GU-72
- Frequency range: 3.5–28 MHz
- Output: 500 W
On the air
Each tube carries about half of the 500 W. Against a 100 W transceiver used barefoot, that is around 7 dB more, a bit over one S-unit at the other end. On 80 and 40 m at night or in a 20 m pile-up, one S-unit is often what gets the contact through.