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https://nebula.wsimg.com/c8d5a02bc7172af447d8666359a37992?AccessKeyId=DAA432FA80C5DABC0234&disposition=0&alloworigin=1 https://github.com/sv1onw/si5351a-gen _._

Ashher, Do I change only C25-C27 or would C61,C31,C23,C53 going to the bidirectional amps also need to be changed. Joel KB6QVI

Hello all! I need to decide which bitx version to build (3B vs 3C). As I understand, the 3B uses diode ring mixers and wound toroids, and the 3C uses factory made mixers. My question is, *is there

I take the ringing back, bad scope probe ground connection. Signal is much better, 1.6 v p-p, sort of squarish with some ringing on top and bottom peaks. 73 Ken

Out of interest sake, I scoped the 5351 signal at T2 with 2ma and 8 ma. The signal is identical. But the signal is distorted. The signal is 2 v p-p but 0.5 volts is ringing at the top and bottom the

You're right. Reading further on the Qrp labs website, they state Farhan recommends using the DDS and in that paragraph is says to cut out the coil. then plug in the DDS and you are good to go.

Hello, I wanted to share a gear reduction drive I made for my BITX40 kit that I got last week. A laser printer that I had stripped for parts had some nylon gears in it, and one of them was keyed,

If you leave the coil in place, you are providing a series LC circuit to the load of the DDS. At resonate, that would be a short to the DDS to ground. Probably not ideal. I'd remove it.

When using the DDS is it necessary to take the coil , L4, out of circuit. By not using the tuning pot the circuit has no power., does the coil still affect the circuit or does it physically need

Frankly, I haven't notice a difference between 2ma and 8ma, that's why I always leave them at 8. Joel Caulkins KB6QVI Joel Caulkins KB6QVI

I run mine at 2ma and it seems to work a treat... 02:15 AM, Joel Caulkins caulktel@... [BITX20] wrote: is the third Si5351 VFO I have built and I left them all at 8ma, and doesn't appear

I call cq I heard nothing again. But today was good. Made a few contacts with good reports on audio.

Joe, I could hear you, KD0OUR, and WB0WHD from my QTH in Idaho using my BiTX40v3. All 3 of you were just above the noise level. I tried to check in but I don't think 40 mtrs is stretching that far

Hi Joe! Ooops, I'm sorry but that wasn't my BITX, but a Kenwood TS-2000 (100w). Deep fades as you said. The BITX is a Hendricks kit but I really want to build one w/o PCB aka ugly. Thanks for

We has a nice BITX NET tonight. Four stations checked in. W3TTT, KC9DZT, KD80UR, AND WB0WHD. The last station WB0WHD was using his BitX ! Even with the poor band conditions, he got through to

Looking for checkins on the BITX net 7.285 right now [BITX20] <BITX20@...> wrote:

My first experience with nano and 5351 was with Juliano's LBS. The code was not using the library correctly and it turned out it was using th 2ma o/p, or 200 ohms. I fixed the library calls to use the

You might want to consider this VFO sketch. I used this one with a Arduino Nano. It tunes normally with a encoder and display or you can control the frequency with any serial terminal program. Im

Take a look at Controlling The Si5351 Via USB https://ceworkbench.wordpress.com/2015/05/19/controlling-the-si5351-via-usb/

Hello Randy, This info may be of help to you and may be not , but I think it’s worth a shot, as the software is written for the Si570 and is in the German language. The DL land amateur radio