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Here's the datasheet for the Si5351: https://www.silabs.com/documents/public/data-sheets/Si5351-B.pdf? Looks like indeed it comes in a 10-lead surface mount version. ________________________________

"It's a Yaesu FT-891. With the regular sketch, I looked for it from 4.8-5.5 mhz. With yours, I looked for it about 200 below and 500 above 7.025 mhz Isn't the Si5351 just a chip? Can't I just replace

Here's the sketch again--- it should generate a signal on the Raduino at 4.925 MHz ________________________________ Sent: Monday, December 18, 2017 8:34 AM To: [email protected] Subject: Re: [BITX20]

That's nice, Andy. But look at what happens to your noise floor in the third instance. The first instance shows a peaks and lows over a 5+ dB range, perhaps a bit too much for a good filter. The

It's a Yaesu FT-891. With the regular sketch, I looked for it from 4.8-5.5 mhz. With yours, I looked for it about 200 below and 500 above 7.025 mhz Isn't the Si5351 just a chip? Can't I just replace

" Make sure you understand how RV1 works. You wrote:It's true that I did move RV1 and RV136 before. I just checked to see what they were on when I obtained these readings and, as I had thought, they

I've already adjusted it to .10 amps Yes.....I turned them fully clockwise to turn them all the way down. I've since turned them counterclockwise to increase them and am now at .10 amps

?When you get the chance, can you give us more specifics on how you connected your communications receiver, how you hunted for the signal? On what frequencies? If it truly isn't there --- andyou CAN

KD8CGH These might be interesting. https://www.smashingrobotics.com/arduino-simulators-lineup-start-developing-without-real-board/ https://sourceforge.net/projects/simulide/?source=directory Arv K7HKL

Make sure you understand how RV1 works. You wrote:It's true that I did move RV1 and RV136 before. I just checked to see what they were on when I obtained these readings and, as I had thought, they are

Ok, I tried both farhan's sketch and Gordon's. Neither produced a signal.

I still have my K&R "borrowed" from my company's tech library decades ago. Return was made moot by the library closing. However, I did return the Knuth.? I also have several of Jack's books I bought.

remember that RV1 (PA BIAS) works backwards from what you might think.Fully clockwise should give a 0 amp reading and turning it counter clockwise will increase PA current

Sorry, I should have said that the current drawn by the Antenna Analyser is around 400 mA. Worth a look to see if we can't get that down for the uBITX VFO/TFT, asuming the use of the same size TFT.

Peter: This has already been more or less accomplished by Hans Summers and a slew of others. See the QRPLabs website for more information. The first thing to consider is what GPS unit you are going to

Those wishing to switch between CW and SSB crystal filters might want to reread this other nugget from Farhan: ? ??/g/BITX20/message/36041 Since the uBitx does not bother with a

terrible, i will fix it today. - f

V2.02 installed and calibrated First contact ZS6CCY South Africa Thanks Allard for another well executed upgrade 73, Willy W1LY

I traced it down to a DC ground loop. When the uBitx is grounded, the power supply line current reading dropped. If I put an ammeter in the ground line I got a current reading equal to the power line

The TFT/VFO will depend somewhat on the size of the display you use. I can't find the current draw right now, but I thought it was 180mA for the 2.8" display. I'll keep looking. Jack, W8TEE To: