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Hi Joe You can find info here http://www.hfsigs.com/ 73 Ken VA3ABN BITX20@...> wrote:

How do you adjust the tuning segment of the band. My coverage is mostly the bottom part of 40. On the same note, can CW be added, in addition to ssb? Travis Russell KK4YMI Sent from my iPhone

Here my enclosure got it off Amazon. BUD Industries CU-3008-A Aluminum Electronics Minibox, 7" Length x 5" Width x 3" Height, Natural Finish

Hi Gents, I'm new to the group. Our club is considering building BITX40'a as a club project. I'll probably have many questions as we go. Number 1- Anyone know the dimensions of the circuit board,

Bill at about 16:07 I called you and could hear some one respond, but I make out the call sign as the qrm was I and the signal was just above the noise in So Cal. 73 Tim Sutton Ki6bge

It is 1900 EST, 0000Z??? I'm on 7.285?with a BITX.? I'll call CQ.? 73?? Bill N2CQR

Here is a comparison of mixers: Double Balanced Mixers | Hobbytronix http://www.hobbytronix.net/electronics/double-balanced-mixers/ http://www.hobbytronix.net/electronics/double-balanced-mixers/

Hi Mark, I made up two modules. One with ADE and one with homebrew torroids and 1n4148 diodes. I have no specialist equipment with the exception of my ears but there was no discernible difference

Thanks for the links ARV. 73 Ken VA3ABN BITX20@...> wrote:

http://ak2b.blogspot.com/2015/01/si5351-simple-vfo-hardware-setup.html _._

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