开云体育

These steps make sense to me, especially the first one.? I did try killing the power to the BiDi amp and that had no effect. The one point that needs to be made is that I am not the only one

Evan, That tp2 scope trace for 40m looks pretty bad. It's ok to have harmonics present, but they shouldn't nearly overpower the fundamental like that. What does tp13 look like, is there possibly

There are radios with the Si4735 instead of the Si4732. I don't really know the difference even looking to the datasheet. There seem a bit of confusion, at least to me, in the descriptions whether

Thanks OM Raj!! Will revert after checking! 73

Jerry, Sorry, I rethought the prior email and it is the 2nd harmonic that is causing the issue.? Somehow it is canceling some of the square wave that should be the 40meter signal.? That is also why

Jerry, On thinking about the waveforms, could it be that the 3rd order harmonic on 40meters, being below the 30MHz filter cutoff is causing the issue? More data, the TP12 readings for 80meters and

Jerry, Here are three screenshots from my scope: They are from TP2 of the ?BITX.? The one that is not the correct measured frequency is supposed to be 40meters.? The frequency for 40meters was set

Hi Evan, Yes. I see. I'll check output on SSB and will look out for your findings. Best, N

Thanks everyone, sounds good to me. I will replace the regulator and add the dropping resistor both. Thanks, Mike

Got it, thank you again Evan. As it happens, I haven't tinkered much with CW yet, but I anticipate it in the future. Actually, despite having an Extra license, I have never so much as keyed a mic, not

Evan, I'm not 100% sure I understand what a "very high low harmonic" is. Operating a 7mhz, I assume these are 2'd and 3'rd harmonics, so 14 and 21 mhz. I'd expect that on pretty much all bands at TP1,

Jerry, I tried putting a 2.2kOhm resistor in parallel with R104 and got the same results.? Evidently, it is not the diode bias that is the issue. I did note that the waveform at TP1 and TP2 has very

Skip, You correct in that there is still heat that needs to be dissipated.? The reason to go to the higher current rated device is that it can handle the higher current without generating as much

Gamaliel, Your statement is true IF you do not want to get serious with CW.? There are a couple of options that make the ?BITX operate more as most commercial rigs do on CW.? The most significant

Mike replacing the regulator on the Radunio will not solve the heat problem. The regulator will source at least 1 amp to run everything that needs 5 Volts. The main problem is that if your supply

It *seems* - and someone please correct me, in the likely event that I am wrong, bilut it *seems* that the newest stock firmware is quite solid, and has incorporated many of the advantages of the

Mike, I run a 2.8" display on a stock v5 with just an added heatsink to the regulator.? You could go the extra step and add a series resistor to drop the 12+ volts (I am running 13.8) to a lower

Nick, If you scroll back through some of the earlier posts on this thread you will see that I have a very similar issue with my v6 that I just assembled in the last two weeks.? It is not as drastic

Hi Evan, QRPGuys' Dummy Load/Power Meter kit arrived. Built and attached. Handy piece of kit for QRP power levels. Anyhow, essentially it confirms the reading I received with the borrowed meter ie 18V

Thanks a lot, Bob! /s Now my wallet is a little lighter than before...