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Larry N2AJX Wrote “ I swept the crystal filter and found its 3dB bandwith at only 1.2 kHz, less than half of what it should be. So I experimented a little and found that by changing the 5 capacitors

Such wonderful data! Warren, hoorah! I'm stuck at a medical education seminar getting terabytes of knowledge being poured into my head on pacemakers and their application and interrogation.....but at

Can you send me a copy of the BOM for the uBITX? Thanks, Jim W0CHL

Merci à tous les amis qui m'ont aidé, mais difficile à trouver. Heureusement un ami informaticien a trouvé. Logiviel Arduino mal installé et bug dans le fichier. Murphy était au QRA. Mais tout

Il faut aussi faire attention a un compte non administrateur sous Windows, cela génère des messages d’erreur sur l?ide arduino ressemblant à des erreurs de compilation-> Faire la manip avec un

Tim, I am not absolutely sure but regarding the RM-Italy without lowpass filters I think they are not imported in the USA. If you download the manuals from their site they state the user must provide

Allison Thank you for your feedback and test results. I am not an RF expert like you. My major is not RF. I just wondered how Harmonics and Spurs can be easily tailored to the level that users want.

Larry i ve seen a page comparing arduino consumptions genuine and clone, it wasn’t so different, more reliable with genuine (quality test) but not bad at all for the great majority of clones remi

Dennis Yancy, There is what the radio can do and what the user did.? That case its what the user did and more than likely what the radio and amplifier can do is far better. The answer but people say

Here's where Warren parked his screenshots. ? ??/g/BITX20/album?id=65861 I'm looking at the screenshots for harmonics of the major bands of 80,40,20,15,10m Ignoring purple CW

Hi, Apparently Dentron never got that radio into full production. I have only ever seen mine for 80 meters and another I exchanged info with another ham. His was for 20 meters. We had the same 5 MHz

I ve got some problem with the nano included in the raduino you could have the same with all blinking ? clones or genuine : it seems that one output was shorted to ground making great current

ULN series relay driver chips switch to ground on positive input and are your friend if you want to have many transistor drivers replaced. http://www.ti.com/lit/ds/symlink/uln2003a.pdf directly

arghgh rew WBand SSB that might be one of those MPa'70 home built? amps as in 20 dollars on ebay and no filter set? or perhaps an RM Italia amp with no filter (some yes,? some no plenty of hoods

Allison, I was wondering why the first IF could cause problems! But due to Your explanation I now understand the problem! It is not caused by the If filter itself but in TX mode by the amp beween the

Larry, Is it possible the clone has a solder short on an output pin other than LCD? I've had that from soldering and it behaves that way (30 to 50 ma per pin shorted). The easy test for any Nano is

The spurs development is a side effect of DBM (MIXERs) operation.? The 45mhz I refer to is the IF output? that feeds the last DBM the other signal is the local oscillator (raduino osc-2).? ? The

Gary: On the letter of the law. Since the uBitx is a kit, you are responsible to assemble it in a fashion that meets the law. If adding the filters does the trick, then it is perfectly legal. It would

I am using the MAX9814 with my uBitx. It has a selectable maximum gain 40, 50 or 60 dB. I am using 40 and it is too high. It picks up all the small sounds in the shack when you are not talking.

IN THE SI5351.INO i FOUND: // User program may have reason to poke new values into these 3 RAM variables uint32_t si5351bx_vcoa = (SI5351BX_XTAL*SI5351BX_MSA); // 25mhzXtal calibrate uint8_t