Hello Joe (VO1NA),
If you're doing modifications on your PA FETs, try the
IXDD614CI MOSFET driver. I can assure you that gate drive problems
are gone then! I use a single IXDD614CI to drive 4x IRFP260N (gates in
parallel) in a 1820 kHz class E PA without any problem :-)
73, Stefan/DK7FC
Am 12.11.2012 11:19, schrieb [email protected]:
GM Gary and Group,
Thank-you for the report. The TX was the original 100 watt unit (Jul
'05
QST) somewhat modified. After frying many FETS over the past decade, a
4427 driver and IRFP260 hexfet was tried. It seems this FET had too
much gate capacitance for the totem pole driver, hence the 4427. The
gate waveform looks a lot better and the heatsink was cool this
morning, presumably
because the RDS was lower than that for the IRF640.
The Decca is on standby after a heart-breaking experience. More on
that
later...
Thanks to you Gary and the others who operate the grabber services.
73
Joe VO1NA
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