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No Sent: Thursday, April 19, 2018 8:15 AM To: [email protected] Subject: Re: [BITX20] ubitx is available for $109, there are a3 catches Ashhar Farhan, Made my payment weeks ago. Haven't heard

Here's mine.? I made it from an old 9 volt flashlight.

Gordon: Very high, about 30 K. It actually helps us. Howard

That is a good question. In our application, the impedance is still high, it just becomes more capacitive then inductive. If you look at the impedance plot, the resonance is about 20 MHz, but the

Hi Doug, Agreed. I operate remotely from the Yukon as VY1AAA a lot... when on FT8, it generates Big pileups. Those people who understand how to use split in FT8 get through faster. Technique is

?I found some on digikey with a self resonaance 40 Mhz or higher.... probably does matter. At the self resonant point the series impeane will be very

Understood. I’m wanting to put transverters in my ubitx; would love to control the I/O switching, as well as have the display show the transverted frequency. So, these would not be signals that

does it matter that most 27uH inductors seem to have a self resonant frequency below 28MHz?

Has anyone tried a softrock and hdsdr with Ubitx to get the spectrum and waterfall display?? (or something similar?) If so, can you please describe how to go about doing it? thanks, Paul

Could work fine. The library to speak i2c is already getting loaded for the si5351. Primary issue I see is that i2c links take a millisecond or so, vs under a microsecond for direct access of an IO

Looks like a great idea to me.? I googled the mentioned boards and there is a lot of info on how to use these.? Sparkfun has breakout boards for a similar device for $5 as well as examples and links

Hi Tim, Thank you for the offer. I think it would be more useful if you have the actual uBITX radio in-hand for testing. You could email me when your rig is on-line. Thanks, Rod KM6Sn

Thanks Gerry.? Interestingly enough I did some searching on the topic of operating FT8 in split mode.? Turns out it is a hotly contested topic in certain circles with very strong opinions on both

Doug, A picture is worth a thousand words: No need, or reason, to use offset in the transmitter. In fact, if you have CAT, WSJT controlls the transmitter frequency. 73, Gerry W1VE

Hi Rod, I don't have my radio yet awaiting shipping. But if it's just a software thing I will be more than happy to help. I run Ubuntu x64 and Debian 9 and 8 but can spin up some other distros via my

Within WSJT-X, you pick the transmit and receive frequencies, via the WSJT UI. These are audio frequencies in your passband, not RF frequencies. 73, Gerry W1VE

First off, thank you both for the replies.? Secondly, if my response came across as harsh that was not the intention.? I think we are now splitting hairs on common practice vs best practice.? Right

howard -- thank you for that review! The inductor I find is up into the 2-3K (ohms reactance) range by 20 MHz so it definitely changes the feedback ratio at the higher frequencies. Capacitors

selling my micro - bitix. it has? the to-220 mounting kit on each transistor. metal case, asking? $ 100.00 also replaced the audio chip, added a 9 volt reg. and a socket for? the audio chip. I just

Doug, You are misunderstanding his answer. You transmit AND receive on the exact center frequency: 7074.000 for 40m. No offsets, RIT, etc. The tuning is done in the audio passband. 73, Gerry