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I'm expecting to be able to make real baseline measurements tonight.? ?My receiver (Icom 718) cannot really go past 30 Mhz so I'm restricted to measuring harmonics' strengths below that

Since several asked if the Raduino "Clone" board kit available through the "Triumvirate Skonk Worx" (www.w0eb.com) would work with the BITX40, I did a little research and the answer is YES it will.?

On Mon, Aug 27, 2018 at 03:26 PM, SV9CVJ Nikos wrote: > > You mast have this hex file in your personal folder? > UBITX_CEC_V1.097_NX.hex

1.? Install Mono on Linux 2.? On terminal type? " avrdude -v -patmega328p -Uflash:w:UBITX_CEC_V1.097_NX.hex:i -carduino -b?? 57600 -P /dev/ttyUSB0 " 3.? Enter

Brent, Six, 100,000 ohm resistors in parallel, coming from the dummy load, feeding two, 100 ohm resistors in parallel across a BNC connector. Approximately 50 DB attenuation. Built it to or. three

99% CW on my uBITX.? I have the click and AGC boards installed along with a Hi-Per-Mite outboard filter. Works great. 73, Bill NZ0T

I put in a pull request to fix this 4 days ago.? Linux uses a case-sensitive filesystem so you need to change the case.? The case is already correct in ubitx.h.? It is incorrect

Tom, A L network L first is a low pass.? However most are run at such low loaded Q they are not very useful for harmonic control.? Typical Q is under 10 and 2 is not uncommon. Allison

Brent, Yes, QST September 1988, bandpass filters. For 15, 12 and 10. Allison

Yes, the tune able preselector idea is what I was thinking. I believe I have all the parts in my junk box. Also, has anyone here built a tap to sample signals from a dummy load? I don't have a

hi works perfectly in windows but linux is proving a bit difficult terry gm4dso

Referring to the parallel resonant transformer (especially the excellent description by Chuck N1KGY), if I wanted to put the capacitor on the low impedance side instead of the high side, let's say at

I've never had my uBitx on phone.? CW only. I do have a microphone but I'd have to look for it!

Please disregard my previous post as it was a comment on another thread!

What you ask is a tunable pre selector. Simple schematics may be taken from the receiver preselectors by the MFJ. Take the components such as capacitors able to the voltage required. And see whether

Thanks Allison, haven't checked the coils yet.? Finally got the rig back on line and operating.? I put in an inline fuse and blew four of them adjusting the bias and rv1.? The VERY best advise I

Hi Chuck, indeed I was thinking with the logic of building wideband transmission line transformers which cannot be easily built with such a high transformation ratio. As far as I understand you would

https://www.youtube.com/watch?v=9vhkpnvjBAE

I spent the first 10 years as a ham QRP and worked the world and I was lucky to have a dipole and vertical (vertical worked better). Now 40 years later I'm getting back in and going QRP w/ EFHW.

Be very careful playing on 160m in the uBitX stock configuration. The PA easily puts out over 30watts with the second and 3rd harmonics to join the party as well. You should have a fuse in-line to