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Here's some old threads (rants) on this: ? ?/g/BITX20/message/19453 ? ?/g/BITX20/message/21282 ? ?(

Ya know, diagnostic software is a good thing and should be done, but Hans really got it right with the QRP-LABS QCX by building several tools into the kit… like a DVM, signal generator, Frequency

Hi John, Capital idea! Some thoughts: 1. the Nano? can send data back on the serial port to help diagnose a rig that is not working. ??? Perhaps report the status of PTT, and the analog

Respectfully, as Allison points out, it's not just the PA active element that will be the problem. When your frequency width is an order of magnitude, e.g. 14Mhz to 144Mhz, you begin to run into all

All: I think Chuck Adams has the right approach to this. His video series on YouTube for building W8DIZ's 1 Watter (1Watter Transceiver Build, Phase 1 by K7QO) has a lot of good stuff about kit

I've never been able to get over 25db of carrier rejection according to my Rigol DSA815. Not unless I move the BFO so far that signals are unintelligible. If you adjust by 6db to allow for PEP

Another member of the group gave me this advice. Tune to 7074 using LSB. You should hear nothing. Then change to USB and you should hear all kinds of psk and other digital modes. If you hear these

Yes Howard, But still, that triggered an idea, with a proper voltage divider and bias circuit (4 components) we can have a probe connected to the spare analogue input.? It should be sensitive

Two things result in carrier... One is the BFO too close to or in the filter passband, it should be 6-10 db down the edge of the filter. Blaming the filter will not fix that, unless its seriously

Allison, For a power chain of about 5 watts that goes from 50 mhz to 500 mhz, what would be your recommendations? The RD15HVF1 seems to be used frequently at 435 Mhz. Are there any broadband

Several things, like others have repeatedly pointed out the uBITX is very unsuited for FM or AM. FM needs wider filter and far more gain to get the needed limiting action.? Its not drop in its

http://tinyurl.com/y9zpmp3t _._

Hi ! I am also interested in seeing filter plots measured on a professional test instruments.Not much information is available on topic. Dishal predicts totally different values for capacitors and

Okay, upon rereading my last message in this topic, I realized I sounded like I didn't know how to solder.? :/ I need the pinout for the Micro-USB cable to solder to the PCB that the USB-B socket is

Great idea. If the Arduino only had more inputs we could do a really thorough job with some mods.

I have started developing a diagnostic software for the uBitx.? The need arose following a forum member's trouble with his Raduino. The objective is to help both the original kit builder for issues

I'm not sure what "fake" means in this context, since the Uno design is part of the Creative Commons Attribution ShareAlike 3.0 agreement. Simply stated it means you can use the design on your own

Put me down for two kits, SMT or other, doesn't matter. Thanks ...? ? Mark? ? AA7TA

DuWayne, nd6t has a circuit to measure forward and reverse power. I am only using reverse power because maximum forward power and minimum reverse power doesn't seem to occur at the same tuning point

Unfortunately, Jack, the picture shows what appears to be a UNO fake. Most of the clones use a CH340 USB chip; this appears to use a ATMega16U like the original UNO , and so is a copyright violation.