This device is designed for use with SDR radios , like ANAN-10, FLEX-1500 or others.
With 5 to 6 W input power from SDR it runs solid 300W to your antenna. 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.
Active elements are matched pair of SD2933 MOSFET transistors (see schematic) in AB-class. 2-tone measured IMD3 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 requirements is 50V 12-15A.
If comes with BPF (available on Ebay also) this device will be controlled by HERMES-based SDR completely: RX/TX switching, band changing and SWR protection becomes automatic.
Board size 190 x 165 mm.
This device does not include heatsink. Add $50 for ready-to-use aluminium 3000 square cm heatsink and $35 for separate box shipping..
More tech info at
http://eb104.unoforum.ru/?1-8-0-00000002-000-15-0-1380195549 .
http://www.ebay.com/itm/300-W-ouput-HF-amplifier-for-SDR-ANAN-10-FLEX-1500-etc-LPF-included-/221354265434?pt=US_Ham_Radio_Amplifiers&hash=item3389be0b5a
