Метка: amplifiers
Testing MRFE6VP61K25H
Photos and video (RU)
Big HF load
It’s based on a copper plate, big old whipped aluminium radiator and two 100Ohm resistors, 800watt each.
Some interesting packages
Longer telescopic part for vertical antenna — better SWR on 40m and 20m without a coil: Copper plate for 1.5kW load: Resistors
Dn-radio kit rd16 amp. IMD3
Not the best, around 20dbc — 26db PEP average, needs some work 
Wolf 3.5″ IMD 3
10watt power 28dbc — 34db PEP: 10watt power 30dbc — 36db PEP: 5watt power 15dbc — 21db PEP:
Wolf2 amplifier IMD3
102W 26dbc = 32 db PEP (taking average — did multiple measures and they were around this value): 1A current on the
Wolf 7 amplifier IMD 3
DAC driver output — intermodulations somewhere at the noise floor : 50W 37dbc = 43db PEP: 80W 31dbc = 37db PEP:
Wolf 7″ amplifier in the thermal camera
No active cooling. Also there are no feedback circuits on both stages and untuned bias on the second.
Just photo of mrfx1k80h amp. parts
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