Mighty fine junk Sent from my iPhone
> On Apr 7, 2019, at 10:22, Alan Bloom <n...@sonic.net> wrote: > > I've long had mixed feelings about MFJ. They have some very > interesting, innovative, and cost-competitive products. However > sometimes the quality isn't there. For example I have an MFJ antenna > analyzer that was intermittent until I fixed a poor ground connection. > I forget the details, but as I recall the problem was partly one of > design. > > Alan N1AL > >> On 2019-04-07 09:28, Wayne Burdick wrote: >> >> I've used many MFJ products and in have had very little trouble with any of >> them. For example, I make frequent use an MFJ-223 hand-held VNA -- it's >> versatile and does the job. I've also used their manual tuners, antenna >> switches, and portable/mobile whips. They have a very comprehensive product >> line that's really unique in the industry. >> >> That said, I do have some suggestions for MFJ's engineering team on how they >> might improve their ATU. >> >> Looking at the photo, I see that they used much smaller toroidal cores for 5 >> of the 8 inductors in the L network. This could result in excessive heating, >> especially on the higher bands, at full power into a worst-case match. We >> specified T68 sized cores to remain conservative based on extensive testing. >> Also, if you click on the photo to see the details, you'll see what appears >> to be very inconsistent hand soldering of the SMD components. While this >> doesn't necessarily worsen performance or reliability, it should be done in >> a way that inspires confidence in the buyer. (Easy for me to say, of course. >> We have the luxury of mass-producing these assemblies using automated >> pick-and-place equipment at our fabricator in Monterey.) >> >> Wayne >> N6KR > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
