Folks, we exceeding the single topic limit number of posts and its also a long delayed repeat of a prior thread from over a year or two ago.
Let's close it in the interest of relieving email overload for our other readers. Feel free to search the nabble archive of the list for prior posts on this topic. Its also outside of the list guidelines to criticize other manufacturer's products here. 73, Eric Moderator, from time to time elecraft.com _..._ > On Apr 7, 2019, at 10:22 AM, Alan Bloom <[email protected]> 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:[email protected] > > 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:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
