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I have mine with an attached 5" display working good with FT8 and maybe fldigi. Short term memory shot at 78. I'll fire it up today and take some notes. I'm using the handy usb sound card with a short

If you don't have a scope, perhaps you have or can borrow a receiver that can tune those oscillators in. The oscillators are an unmodulated carrier, so best if the receiver is in SSB mode so you can

Tnx dave. This is a community effort as you know. I was helped with kicad by bhatnagar who is on this group. - f

Ashhar, I just wanted to comment on your Micro BITX kits in general.? In showing your circuit boards to some engineering friends of mine, they, and I, were impressed with the layout and workmanship

The 8mhz clock is an RC oscillator inside the ATmega328, no external crystal or resonator required. Not very accurate, will wander about with temperature. But can be trimmed via flash bits if it winds

Mr Farhan did a great job of designing the uBITX and keeping the price as low as it is. I doubt it could be done, but I would like to see something along the same line that has NBFM and maybe AM and a

A good compromise might be to use external LPF's in the antenna coax when operating on seldom used bands such as 160m,30m,17m,12m. Recode setTXFilters() to use the the LPF for the next band up.? The

It has been discussed here before. I have a RPi3b running FLdigi and its ok with a external usb sound card and a FTDI RS232-3v3 serial cable. the serial cable provides DTR keying(externa or PTT)? for

Several things: The IRF510 is a very good RF device in that it achieves a lot of gain and at respectable power. That translates to about 16dB in the HF range with 50 -200ma of bias.? That also means

Too bad the pictures aren't clickable (for enlarging). Only the schematic gets bigger 73 K5KDT

Figured I would share my design of the front panel of the Banggood (

I find the Arduino clones easy enough, but the CH340 trips up lots of folks, especially those with a Mac. Doing away with or disabling the CH340, then coming in with a UART through D0,D1 allows a

Hi! I was discussing with Farhan on this topic for an add on demod board to add more versatility to uBitx.? CB radios often used a common chip for AM as well as NBFM receive. I enquired here and

Periodic message and note... The work I'm doing for the power chain is centered on getting about 10W and some level of uniformity to 10M.? Not all the things I'm doing will help if your goal is 13W

Increasing efficiency with frequency usually indicates not enough inductance or over coupling (too high a tranformation ratio).??I'd expect the efficiency to peak around 10mhz? and what finals are

Thanks for this.? I downloaded the code and will take a look.

FOKO The "Miguel" mod that you are talking about has become a de-facto standard for the QRP-Kits version of BITX.? It decreases higher frequency gain of the IRF510's and makes them less suceptible to

Yes! There's a wiki on doing a vanilla buid I started for the same reasons you mention.??/g/BITX20/wiki/uBITX-Assembly It's not mine, it's the groups, so feel free to improve it.?

Mornin' Joel: Agree 100%. The CAT people do need the interface and the reason I push that more than the non-USB versions is because much of my work is done with people who don't have much (any?)

I would like to chat with someone that has set there ubtx up with a raspberry pi and is using fl digi, I think this may be a good way to go as I have most of the parts. Not sure if I need an external