Re: [O_P_E_R_A_] Re: LF: VO1NA OP32 137.777 kHz

[jcraig@mun.ca]

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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