300W amplifier in 10W 1.8-54MHz SDR Hermes ANAN, FLEX-1500 LPF CWithSSB
The amplifier's output is filtered by LPF with diplexer, so the second and higher harmonics of transmitted signal are suppressed more than 47 dB. To switch the filters you need simple open-collector circuit or external switch. 1.8-54MHz version has 160 meters LPF replaced by 54MHz, so 3.5 MHz LPF is used on 160 meters. Active elements are matched pair of VRF2933 MOSFET transistors (see schematic) in AB-class. 2-tone measured IMD 3 is -40 dBc.Measured by KC901H network analyser suppression of second and third harmonics (amplifier with diplexer) is: 10 meters 2nd -52 dB 3rd -55 dB 20 meters 2nd -54 dB 3rd -47 dB 80 meters 2nd -53 dB 3rd -51 dB. The power supply for amplifier is 50VDC 10-12A. This device will be controlled by HERMES-based SDR completely: RX/TX switching, band changing and SWR protection becomes automatic through user programmable pins of accessory connector. Board size 190 x 165 mm. This device does not include heatsink. The item "300W amplifier in 10W 1.8-54MHz SDR Hermes ANAN, FLEX-1500 LPF CWithSSB" is in sale since Wednesday, March 30, 2016. This item is in the category "Consumer Electronics\Radio Communication\Ham, Amateur Radio\Ham Radio Amplifiers". The seller is "v_phil" and is located in Voronezh, default. This item can be shipped worldwide.
- Brand: Unbranded/Generic
- MPN: Does Not Apply
- Max. Output Power: 300W
- Frequency Band(s): HF
- Supported Modes: AM
- Country/Region of Manufacture: Russian Federation