Not to contradict the expert but in addition to the specified parameters I would want to know the on resistance (Ron) and the gate threshold voltages were the same before I would sub. 73 Fred, AE6QL
-----Original Message----- From: Elecraft [mailto:[email protected]] On Behalf Of Wayne Burdick Sent: Saturday, November 01, 2014 9:54 PM To: wa9fvp Cc: [email protected] Subject: Re: [Elecraft] KPA500 fault at H44KW (no pwr high SWR) Sure, as long as the pinouts are the same, and the voltage and current ratings meet your switching requirements. 73, Wayne N6KR On Nov 1, 2014, at 9:16 PM, wa9fvp <[email protected]> wrote: > Here's a funny story. Last week I ordered a KPA500. Two days later a > nearby Ham dropped off his KPA500 that failed. His K3 was showing > high SWR with no power. He purchased his a year ago and didn't want > to pay the expense of shipping it back to the factory. > > I found a defective Q5 (see the TR switch schematic) on the Filter board. > Q5, an IPA50R399P is a 550v MOS Power Transistor. My question is; Q4 > a similar device (an IRFSL9N60A) with almost identical specifications > except it's a 600V, MOS transistor. Can I use it as a replacement for > an IPA50R399P? > > Jack WA9FVP > Willco Electronics > > > > ----- > Jack WA9FVP > > Sent from my TRS-80 :-) > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/KPA500-fault-at-H44KW-no-pwr-high > -SWR-tp7570161p7594358.html Sent from the Elecraft mailing list > archive at Nabble.com. > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected] ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2014.0.4765 / Virus Database: 4189/8494 - Release Date: 11/01/14 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
