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We've discussed the disadvantages of making all of the files ino files before. The biggest loss is you give up incremental compiles. For me, compiling 210K of program code dozens of times each day,

First, K3 is the main TX/RX relay so it's not trading an entire circuit in or out of the mix; it's just routing one point (antenna) to one place (RX) or 'tother (TX). The quick way to see a difference

Michael makes a good point - that even an inexpensive product needs to meet the minimum regulatory requirements to be considered serious beyond people (like myself, admittedly) who bought it knowing

I wonder if there is a bug in the software to make the transmit signal wrong.? I will debug it when I get a chance.? Either way though I should be able to compensate for transmit frequency being off

I tried to model the agc on multsim but not sure I did it right the signal doesn't appear to come out correctly https://www.multisim.com/content/JhzoMNRpMHvSBitkNMNuZC/agc-ubitx/

I believe that there is uniform agreement that the relay replacements do reduce the harmonics.? That is the issue that is solved by external low pass filters. The spurs issues for 20m and higher

I cannot find out if ubitx.net is part of the designers support but they seem to have up to date mods at this location: ubitx.net/%C2%B5bitx-strengths-and-weaknesses/. The authors claim these mods

Hi Gary... well you hit the nail on the head. I put all the ino's one after the other and it compiled ok. However, the Bitx goes into cw mode and sends code? I dropped each ino in the editor one after

Trying to debug a faulty ubitx v4 with old eyes so an electronic copy of the component placement or board silkscreen would really help. 73 Bob GM4CID

Saved that site. But on that page they only have Push-On Knobs - "D" Shaft which means 1/4-in "bore" or hole and I did not see one for a smaller shaft. May on another page. Thanks for the website. May

When I'm building and need an item that is not handy, the first thing I do is look around to see what I already have to use in the old experimenter's tradition. I thought about the shrink tubing idea

The only mention of the radio needing mods to be legal is on the ubitx.net page, It reads as follows. *WARNING:* AS shipped, your ubitx probably will not be compliant with emission requirements.It has

The wirenut I used is the twist-on type. No screws. But I don't know what you are using but if it works for you, good. I also only have syringes for diabetes that don't seem appropriate for making

RE " I would agree that I would still purchase the kit if it was listed on the HF Signals site as a "kit" that will need to be upgraded. I have gone back and re-read the home page, and there is no

G1WDF, V4 was a audio amp mod only from TDA2822 to discrete transistor and? it brought out a few test points.? Same circuit for RF and same issues. Maybe when V5 happens.

From the last mixer to the antenna CW and SSB are same. I've seen at least two with a wrong 40M LPF, though it was TX power amp but 80 and 20 had higher power than 40. Seems the coils had about half

Where exactly? is C4? I just can't see it? - neither in the schematic nor on the board?

Jeff, Appears that you are trying to compile just a single ".ino" file (i.e. ubitx_20).? You are missing the remaining required .ino files in the directory as supplied by HFsigs. Not the best coding

Knobs with all different sizes of bore... https://www.surplussales.com/ShaftHardware/Knobs-16.html Or fill 1/4 knob with epoxy after greasing the set screw and all the way in; remove set screw after

A short length of heat-shrink tubing, just length of the shaft and a size that will shrink nice & tight, will usually take up the slack between this shaft size and a more standard 1/4" knob opening.