Check this out - 400 watt carrier, no tubes, MOSFET. Just wow. Has schematics and everything.
The Official Class E Transmitter Web Site by WA1QIX
The Official Class E Transmitter Web Site by WA1QIX
Someone needs to build this and do a documentary for us on the forum!
Someone needs to build this and do a documentary for us on the forum!
I've spoken to Steve (WA1QIX) on 75 meters about these transmitters many times. He says the design works good on AM or CW only, up to 40 meters. Beyond about 10 MHz the Mosfet devices used have too much internal gate capacitance to drive. They do manufacture Mosfets that reduce this problem but they are very expensive and would require different RF design.
. Beyond about 10 MHz the Mosfet devices used have too much internal gate capacitance to drive. They do manufacture Mosfets that reduce this problem but they are very expensive and would require different RF design.
Incoming Region Produces X3 Solar Flare |
May 15, 2024 @ 14:55 UTC |
Another major solar flare, but this time from an active region just beginning to turn into view off the east limb. It is possible that the group responsible is old AR 3654 from the previous rotation. The latest flare, an X2.99 event just peaked at 14:38 UTC (May 15). Stay tuned |