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A 58mhz corner freq should be fine, we want to allow through 45mhz but knock out 90mhz. The 110 ohm impedance may be a bit high, I'd expect that to be a 50 ohm environment, but apparently works well

Hi Lee: I have not seen one. For our development, we made a 30 degree slanted (it doesn't show well) front out of Lexan as seen here: When we are done, we think we will create a thin plastic front

Thanks to all for the info.?? Just ordered the? 7" and the teensy and sound board to be ready. Has anybody found a nice slope front case for it? -- Lee - N9LO?"I Void Warranties"

How did you tune your radio to the signal? Did you go through the calibration of frequency first and zero beat a known carrier?? then adjust the bfo for best tone?

Hi Ashhar, would you be so kind as to supply the make and part number for the new relays, for those of us who need to update your older boards.? Thank you.? Justin N2TOH

Hello Al, Have you heard of Google? I entered JackAl addon for ubitx and came up with https://ubitx.net/tag/jackal/ 73, Terry - KB8AMZ Brimfield Twp, OH USA EN91hd Linux User# 412308, Ubuntu User#

According to a software, the LCL filter has a corner frequency at 58Mhz and has 110 impedance. Is this optimized?

Hi Everyone. I have come across an error in the CW board's instructions on my blog. If you have built one and are having issues with it, please check/replace C9. * C9??0.1u? 104?*NOTE?this

to round it off, a gain plot of a uBITX Bi-Amp stage with standard values. eg gain at Marker #1 45MHz = 30 - 12.74 = 17.26dB ???????????????????????????? #2 90MHz = 30 -

Glenn, I'm assuming you are just looking at the output of the amp at Q20,21,22 and measuring the 90mhz 2'd harmonic of the 45mhz IF signal. For those trying to follow along, this has nothing to do

Allison, Apologies re my recent tests: They were done with a BFR106 in the 1 st stage from other testing, which I had forgotten about. Now re-tested with all 2N3904’s fitted. uBITX Bi-Amp tested

with -30dBm in, 2nd Harm was -50dB With 220 ohms and -30dbm input what was the 2nd harmonic ?

If I recall correctly, Farhan is working with production boards populated with production parts.

Mike From looking at your audio display. You need to come down about 1000 hertz. Normal Comms audio range is about 200 to 3000 Hz. Maybe even 2800 Hz. Mine is set too low and I notice when sending FT8

The one in the image seems a BFO 1-1.5khz off

Mike Its most likely a receiver alignment problem. Good luck with that, but be patient and careful not to loose what u already have. Use your viewer. Regards Roger ZL2RX wrote:

Glen,? ??? 470R?? -20 input gives -1.6dB out, 2nd harmonic is 49.6dB down ? ? 220R -20dBm in gives -1dBm out, 2nd harmonic is 41dB down.<<<<<< What was the collector current of the 3904???

I always do the same thing. Make a test wind to be sure of what I’m working with. MRM

Hi Jack, I have found the turns calculations may not work out well unless you have the exact toroid material. What I thought was a yellow at one point turned out to be some thing else. I would do a

They do have a very good program, although you must register to use it as it's run online. However, it gives you a lot of info over and above the normal # of turns (e.g., wire size for the stated