Re: uBITX Questions (fake semiconductors)
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Jim Schliestett
开云体育? I had the same problem with some power mosfets sold on eBay. I installed one in a 220 MHz transverter and it immediately blew a fuse. Turned out that the devices I received didn’t even have the correct pinout although they had the correct part number. Beware ……. ? From: [email protected] [mailto:[email protected]] On Behalf Of Richard Andrew Knack via Groups.Io
Sent: Tuesday, March 21, 2017 4:40 AM To: [email protected] Subject: Re: [BITX20] uBITX Questions ? Here's a link to an article on how to avoid fake RD16HHF1's... ? ?
? ? Rich KC8MWG ? On Monday, March 20, 2017 11:29 PM, Mvs Sarma <mvssarma@...> wrote: ? members trying for RD16 on ebay are mostly landing at fakes. I had a lot of 10 (supposedly re printed stuff using IRF5** series. ? ?On the item description you clearly find that item is generic, or unbranded , or NEW. ?they are all fake ? ? On Tue, Mar 21, 2017 at 5:00 AM, Trent Trent <vk7hrs@...> wrote: Irf530 would be better HF power and cheaper than the rd16 but a rf16vhf would b nice ? On 21 Mar 2017 4:27 AM, "Jerry Gaffke via Groups.Io" <jgaffke=[email protected]> wrote: Easy enough to twist the gate and drain leads on the RD16HHF1 such that they fit into a board drilled out for the IRF510.? Maybe put a bit of heat shrink on them to ensure they don't touch where they cross over.? Allison reports the IRF510 works as well as the RD16* parts at HF through 50mhz, ?primary reasons to move to the RD16HHF1 is heat: ?avoids need for mica insulators at the heatsink, and gives better heat transfer from die to package tab.? Otherwise the IRF510 is an excellent choice for a minimum cost rig.? Good luck with hacking the uBitx PA to work smoothly from 160 through 2 meters, I'm fine with a good solid simple easy cheap 80/40/20 SSB/CW rig. Jerry, KE7ER On Mon, Mar 20, 2017 at 08:24 am, Lawrence Galea wrote:
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Regards ? |