Ashok, Try the method given in this manual for the N8ME software. There is a section in the CFG menu for frequency and BFO calibration on page 8. https://groups.io/g/BITX20/files/uBITX%206%20N8ME/N8ME

#v6 #ubitxv6 #calibration

also, make sure u use an attenuator on ur nanovna,qrp transmitter so you dont fry something in the ubitx. 73 David ac9xh

#calibration #ubitxv6

I think i meant transceiver,instead of receiver. sorry. 73 David ac9xh

#calibration #ubitxv6

Ashok, 1.Dont try to calibrate the ubitx unless you have a problem.I never did any of the "calibration stuff "others tried.Only thing i did was install n8me software on my ubitx. took care of the freq

#calibration #ubitxv6

Hi all, I am new to uBitx and every then and now I am having one question in my mind. For this time can anyone help with alternative method of calibration because the VU2ESE method of calibration coul

#calibration #ubitxv6

Hi all, I just installed the N8ME firmware with VU3GAO mod and now I need to do calibration. I cannot find any guide to do calibration of uBitx with N8ME firmware. Can anyone help me ? Thanks Ashok VU

#v6 #ubitxv6 #calibration

Hello, thank you for your answer My test model exactly follows the diagram of the 45MHZ filter (self, capacitor and 45MHZ filter) there is a toroid transformer at the inlet and outlet and the capacito

#calibration #filters

Gerard - to be clear, I disconnected the amplifiers to the filter input and the mixing transformer at the output; the L and C are integral part of the filter, they are needed to adapt to 50 ohms. Meas

#calibration #filters

I've connected the nanoVNA to the pads of missing capacitors C216 and C210. I've also tried disconnecting the input and output circuitry to the filter, but not have seen any appreciable effects. This

#calibration #filters

Hello, Can you tell us how you measured it? Where did you connect your nanovna connections to your card. A diagram would be welcome. I did tests on a filter but not directly on the board of my homebre

#calibration #filters

This is the nanoVNA measurement on the 45 filter on my uBitx: Zooming out, there are some 'artifacts' up to -20 dB; anybody has any idea of what they are?

#calibration #filters

Hello, Thank you for your interest on the subject of the 45Mhz filter. You will find interesting answers from the Nanovna forum on the question of the shape of the filter and how to test it. cdt nanov

#calibration #filters

It looks like there is an impedance mismatch. The 45 MHz filter needs 1500 ohms termination.

#calibration #filters

Ra, Ramon, look this video from 2mn30 #554 NANOVNA Measuring Various Bandpass Filters - YouTube it's the same curse. he test directly the filter on the nano strange for a band filter. Also it looks li

#calibration #filters

Add a series resistor of 1.5K to input and output and see what happens. Raj

#calibration #filters

Ramon, i forgot to connect one leg of the filter! lol now it's better but strange!!! need a capacitor?? the one 12mhz works better, but may be that of 12mhz seems to work better at the curve (steeper)

#calibration #filters

Hello ramon, I based myself on this document to quickly make a small model In fact, as on the diagram, 2 toroids connected to the nano and the filter in the center. It’s weird as curve, I agree and th

#calibration #filters

Hi Gerard, I am not an expert either but I think that the appearance of the curve does not seem to correspond to a simple bandpass filter. The curve should be something more like this: On the other ha

#calibration #filters

Ramon, i have tested one of the two filter i have Not sure of the conditions of the test (The filter is located in the center of 2 toroid transformers. so the nano attacks each primary of each trnasfo

#calibration #filters

Hi Gerard, I think the filter that uBitx includes is more than correct. It is even possible that the bandwidth is a bit excessive for reasons of economy and simplicity. This is the curve that I have b

#calibration #filters