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Kees- Modern rigs, use diode switching to engage filters. I suggest using just 1 relay for positive switching and the output of each filter be run through diodes to a commonality. It would reduce

Hi Joe and all others in the group, I've been a ham for more than 60 years and have built several dozens of radio kits. I've owned the best equipment available in times past and having had years of

C'mon, total dumping is unfair. How much did you pay him for the code. Take that into account. Not sure but I think plenty of code is available to tinker with. The guy is gifted, keep him HAPPY.

Now with that said in my prior. The filter is fixable for 80/40/20.? dismount the relays, make some cuts and off to the races. Whine about doing that?? Time to do some basic technical work.? Your

What is the best impedance, size, and wattage for a speaker to be used with the ubitx version 4 board? I read someware 32ohms is this correct?? It may be hard to find tho. I found this speaker on

First item, Digital is SSB!? ?Really!? If SSB is not safe then digital is not either. Now for those that have been inattentive for the last three months. ######################## 80m harmonics, use

Are we ignoring the possibility of using series LC traps to suck out some of the bugs (bug traps...?),????? 8-) Arv, No not ignoring them.? They are generally useless as the assumption is the

Well said, Scott. We should treat the ubitx, and many other HB projects as radio 'build it" kits. I wonder how many other basement projects dont meet spec? I also totally understand where Warren is

Or maybe the website simply intends that under normal operating conditions, propagated signals don’t easily overload the radio.....which may be more true in some parts of the world than others.

Once again Iz, that is the point. You know.... and I know, how to recognize receiver overload and what to do about it. "does not overload easily" is subjective..... but when I have one rig out of

Warren, regarding '''The front-end diode mixer followed by a Hayward/Kopski TIA makes this a crisp receiver that doesn’t overload easily." Simply untrue. Using this receiver 3 miles away from a 1450

Thanks for the book. Chapter 2 is very important. If you want to use the chassis you need to be sure you insulate the tabs from the chassis.

All, as I have problems to upload the pdf files into Groups io I send them directly to the Group as an attachment. So let?s hope they will come throug! Henning DK5LV -----Ursprüngliche

Hi! First i want thank you for your fast answer :-) Ok i have a new question about this.. In the Wire Up Shematic v1.9 i read this: *1. "the Ubitx board should be grounded in a metal case* or a common

Gordon you have missed my point by focusing on what you call "disparagement". My "disparagement" is an attempt to inform those who expect to take the radio out of the box, connect it up and operate

Hi Glenn, I have not been following 100% the group. Is n RX Level Diagram available? Thanks and 73 Gian I7SWX

I simply disagree. It’s all in how you look at it. All of us have problems, you can look at people and equipment as either half full or half empty. Disparaging either has a bad effect. Apparently

Hi, So I can test my uBITX for harmonics and such, I built a "QRP+" dummy load, this weekend, with a 46 DBm attenuator on board. By mounting this to a bigger heatsink or adding fans this should be

Gordon My characterization of the uBitx as "garbage" is a term of art, not science. However, when a commercial radio is advertised as "Build the ?BITX transceiver in an evening. A general coverage,

Joe, Warren published some pretty good numbers way back, and Allyson probably did also, and basically CW mode was in trouble on all the bands. Single side band not quite so much as long as you