Ouch. John K7FD
> On Apr 7, 2019, at 9:35 AM, Ken G Kopp <[email protected]> wrote: > > Perhaps the matter stems from the nationality of MFJ's owner and a > different set of values. > > K0PP > >> On Sun, Apr 7, 2019, 10:28 Wayne Burdick <[email protected]> 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 >> >> >> >>> On Apr 7, 2019, at 9:00 AM, Doug Person <[email protected]> wrote: >>> >>> MFJ has been a leader in automatic tuner technology for years. It was >> probably a very simple engineering process for them to use what they have >> to create a K3 tuner. You may have a dislike of MFJ products. But, that >> doesn't preclude the fact that their tuners work very well. They have been >> selling the K3 tuner for years. It doesn't seem the least bit surprising >> given the modular nature of the K3 and the long history MFJ has with >> automatic tuner technology. Maybe it's actually a complement to Elecraft >> that MFJ takes the K3 so seriously. >>> >>> Doug --KJØF >>> >>>> On 4/7/2019 10:26 AM, KENT TRIMBLE wrote: >>>> Ozarkcon yesterday. Break-time. Pile of MFJ catalogs on a table. Took >> one back to my seat to kill time. Opened it up to the second page and in >> the lower left corner is a box-ad with the following: >>>> >>>> >>>> "MFJ ATU PC Board for Elecraft K-3 Rig. MFJ-950K3 is a super clone of >> the KAT3 optional tuning board for the superb Elecraft K3 transceiver. >> MFJ-950K3 is a direct plug-in PC board for the Elecraft K3 10 Watt or 100 >> Watt model. Covers 1.8 to 54 MHz. This automatic antenna tuner PC board >> features an L-Match design and can match SWR up to 10:1. It handles 100 >> Watts. The ATU PC board has a second antenna port, and a sub-rx SMA port. >> All antenna ports are protected with gas discharge tubes. Super sensitive >> relay allows excellent low current drain. MFJ-950K3 is 4W x 3 1/2H x 1 >> 1/4D inches and easily slides right into the K3’s tuning board slot. Weighs >> less than 1/2 pound. Pick up this great accessory for your K3 today and >> save $$$!" >>>> >>>> >>>> What in the world is that all about? What possible market are they >> shooting at? Who would put anything "MFJ" in anything Elecraft? >>>> >>>> Someone enlighten me! Did I sleep through April 1st? >>>> >>>> https://www.mfjenterprises.com/Product.php?productid=MFJ-950K3 >>>> >>>> 73, >>>> >>>> Kent K9ZTV >> >> >> >> ______________________________________________________________ >> 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 ______________________________________________________________ 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
