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Glenn, I'm not giving approval I was saying in my way your work was extremely informative and clear. least, to visualise just what the issue is.<< It was very clear to me and I hope others

I have spent most of today searching through messages and wiki to no avail.? I am using the basic 3.2 Nextion display and am trying to upload the tft file I downloaded from ubitx.net.? SD card is

Tom To me that makes a lot of sense.? A standalone project that can be used for many other projects.? Suggestion only..? A led per filter to signify what one was selected (led and resistor across

?hey, good finds on the cheaper relays!!!! Gordon ________________________________ Sent: Monday, August 13, 2018 1:40 PM To: [email protected] Subject: Re: [BITX20] Harmonics ?if you were

?if you were determined, you can do some fancy rewiring near the relay and fix even that problem. I think glenn preferred to do it that way. For me, I'll just us a bit of tiny coax for that

Yup it looks like a very easy modificaiton to bring about much better result, which is the kind that I like.... but the only band REALLY hard to fix the spur on is the 15 meter one, right? I

Or you can use the relays the uBITX uses for about $0.60 each ..... HFD27/012-S

Gordon, Good catch on the filter with the feed end being "the other end". Looks like a plan and has enough of a shot to accomplish the desired? goal of clean enough. Allison

Glenn, Good idea about using the HK-41F-12V relays, they are quite inexpensive (<$0.50 on ebay). The contacts are silver and if you want redundancy you can go with the HK-19F-12V relays which are

Gordon, That looks ideal, many will be reluctant to deal with removing the relays from the board. If we give up on the 15m,12m,10m bands due to the (45mhz-FOp) spur, that means all we need is two

Hi Jerry --- I don't think you were addressing ME, but I just proposed about the same thing on a slightly larger board. From my photographs and examination of the board, it looks pretty easy to make

That -43dB rule is generous, should be easy enough to meet. And with thousands of QRP devices out there, the cumulative effect s significant. Warren's spectrum analyzer screenshots show trouble,

AND... It will be hot switching... 73, Bill KU8H

Correction read 2N4427 not the number above as good equivalent for the 3866 in the same TO39 can.

Seems there are some that don’t realize that “the law was made for man, not man for the law.” There are those that won’t solder a mic connector or PL-259 without permission of the FCC. On the

Looks promising. I see the three relays you added, the three large rectangles in a column down through the center of the board. As you know, we need an easily built scheme such as this to have three

Those are great ideas, and I might use that kind of a thing for something completely different.

I wanted simple, small and easy to build. Only needs to drive A-D input, so no buffering required and linearization can be done in software if desired. I'm only interested in 30 mHz and 10W QRP max,

Iz oos, Some do some never even thought of it.? The Anan users tend to be very fastidious and? a lot of them use the adaptive feedback (distortion error correction).? Very clean as an example of

Put decent RF devices in uBitx and then we compare for sure... Rahul VU3WJM No, better devices made it more noticeable.? ?There are issues tied to board layout and lacking filters.? Fix them and