开云体育

Hi Jack, I almost pulled the trigger on this as well, but thought I have a V4 just sitting on the shelf with a Nextion display all hooked up and updated and i haven't used it in a month or so or been

SOLD. -- Jon Titus, KZ1G Herriman, UT USA

Dave Did you try the simple experiment of plugging in a 40m dipole? First adjust audio gain so you hear some noise. When you add the antenna the noise should increase unless the bfo is way off. If

Jon: If it's not sold, I'll take it. Jack, W8TEE

uBITX transceiver for sale.? I built the radio but didn't use it beyond a few quick CW QSOs.? Unfortunately it's unlikely I'll use it again.? Well packaged and shipped in the USA.? Transceiver and

Thanks I'll try those new measurements tonight.? Do the measurements so far say anything?? Seems like it's taking a lot more to get .1 vp-p output than jim's board from all test points.? The weird

TP 16/17 should be "around " 12 mhz ...TP 13/14? 45 mhz ..TP 1/2 ...whatever the reciever is tuned to you could use the 3rd harmonic of your SG at TP13/14 45/3=15mhz??? ..maybe Jim

Cool !! ...Put Signal Gen on CW-2 Pins ...measure there... Change freq +/- 100 khz or so ...Should be broadband at that point with scope indication varying showing AUDIO bandpass ...at that point, the

Not to overlook the obvious. Are you driving into a dummy load? I have seen lots of variation with mis matched antennas.

Thanks for sharing it! Si and quality dds allow for building any conventional receivers (non ADC) with good characteristics. I far prefer using them than a brand rig for casual listening. My approach

If your goal is to repair your radio, I would short circuit your signal tracing a moment and try to decide what else might be wrong. Does the display work correctly? Do you hear any signals on your

Hello everyone, I've spent this month building Farhan's DC40 direct conversion receiver. I adapted it to use a si5351a VFO from QRP Labs, and it's also easy to make it multi-band. I have it set up on

Same stage gains mentioned in dB found here on the homebrew UBITX receiver where I measured each 50 ohm block separately with a 50 ohm termination, except that I’m using a 45 MHz LC filter with 3-4

thanks gilles but i have decided to go for a gsx rig from qrplabs terry

ubitx on 7.152 signal generator set to 11.9962 3.5v got about 80mv p-p TP17

Ooops I think I didn't do it right for TP14 and 17.? My signal generator only goes to 25MHZ so couldn't do TP14. I can retry tp 17. I was testing at 7.150MHZ in general otherwise.

Took off the attenuator and measured at tp 13 took 200mv to get to .1vp-p tp14 took 1.4v to get to .1 vp-p tp17 3.5v only got to 30mv p-p tp16 3.5v only got to 50mv p-p

Forgot? T2 at about 2850 uV got to .1 vp-p

Similar to Jim's measurements These are approximate since I don't have equipment that can measure to microvolts - I estimated based on my max volts into my attenuator and calculating the lower

Frankly, I would not mind seeing other measurements ...at least to form SOME sort of baseline ...As I said ...Quick and dirty Don't like 'em ..delete 'em ....Measure your own and share There has been