Re: Transmit IQ Calibration
Compile Options: ??? Faster with LTO ??? 528MHz ??? Dual Serial I had tried dual serial? when there was no Serial Monitor output with Serial. With dual there is no display at all. I did have
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Robert Luken W3RDL
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#6165
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V11 T-41 PA idle current
With the 510s off the idle current for the PA board on its own is 250mA with the pots adjusted as low as possible. Is this idle current high and indicative of a problem. Howard VE3HBH
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ve3hbh1@...
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#6164
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Re: blowing ULN2803C on LPF-Control
More data here¡ look what happens if you spin the cable connected to J24 around 180 degrees¡. you have the 12V+ from pins 2 & 4 NOW on pins 7 & 9 (the 10M and the 6M lines), BUT THEY go to U10 and
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K9HZ
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#6163
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Re: Transmit IQ Calibration
The only thing the on/off routine needs is the interrupt routine for the pin interrupt. The routine should always be there and it will not be used if you do not build out the hardware (never gets
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K9HZ
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#6162
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Re: blowing ULN2803C on LPF-Control
Ohhhh wait. Make sure the cable (low control J27) pins 2 and 4 are not somehow switched to 7 and 9 by being 180 degrees wrong !!! That would cause this. 12V directly on the OCL!!! Dr. William J.
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K9HZ
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#6161
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Re: blowing ULN2803C on LPF-Control
Something is not right. There is nothing connected to those parts that would cause a short great enough to cause smoke. Its a ULN2803 that drives the relays (open collector to ground when activated).
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K9HZ
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#6160
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Re: blowing ULN2803C on LPF-Control
Dave, Specifically which U10 went on which board. We have multiple ICs with the same designation. Could you also give a run down of your configuration? V12 boards from what source, etc?? Al
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Albert Peter
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#6159
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blowing ULN2803C on LPF-Control
I have blown two U10's during receiver calibration this week.? This is after operating for several hours.? One popped when calibrating the 10m band and one when calibrating 6m.? A nice puff of
By
D Solt
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#6158
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Re: Transmit IQ Calibration
Hi, V66-7 is still evolving, so there may be problems. One is the SWR I2C. 66-7 assumes use of the AD7991 and no push button on-off. That is still in progress. How are you configured? It is also
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Albert Peter
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#6157
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Re: Transmit IQ Calibration
Al, I was using Ver66-4 and was successful doing the Frequency C and Receive IQ Cal. All Bands were -75 to 80 Db. I had moved the Temp display to the Top but it was cutting off the top of the Fonts so
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Robert Luken W3RDL
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#6156
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Re: Transmit IQ Calibration
OK. That explains it. I will keep trying to get TX IQ Calibrated Thanks. dave [email protected]> wrote:
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D Solt
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#6155
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Re: Transmit IQ Calibration
Ok Dave, The. Ad7991 is activated in the code and I am not currently using the shutdown routine. The code to read the diode SWR is not in the sketch, although I used it briefly in the beginning . The
By
Albert Peter
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#6154
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Re: Transmit IQ Calibration
Appreciate the help Al. Still hangs after I2C screen. I wonder if my hardware is affecting this. My power detect is the swr_diode and my readout is swr_analog. Additionally, my si5351 is 0x6F instead
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D Solt
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#6153
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Re: Transmit IQ Calibration
Hi, I just took the Zip file and used that specific sketch to upload, everything worked just fine. My memory allocations are different, however. The options I used to compile are: * Teensy 4.1 *
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Albert Peter
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#6152
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Re: Transmit IQ Calibration
Thanks Al. I have loaded the new SW after erasing the Teensy memory. The T41 boots with version 66.8, even though the zip file says 66.7. However, after bootup, the screen is frozen and no buttons or
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D Solt
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#6151
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Re: Transmit IQ Calibration
Hi, Jack and I are working on an official release, but until then , try this one. It has revised calibration code. Also, the preliminary Cal Instructions are attached. Al
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Albert Peter
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#6150
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Re: Transmit IQ Calibration
66.4
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D Solt
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#6149
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Re: Transmit IQ Calibration
Hi, What software version are you using? Al
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Albert Peter
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#6148
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Transmit IQ Calibration
My T41 seems to be mostly working, but I have not been able to do the Transmit IQ Calibration.? I am injecting 750Hz into the mic input, but I don't see any sidebands.? It appears that I am not
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D Solt
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#6147
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Re: RF Board update.
Bill, thanks for the RF Board BOM update, Jerry N KD4TNX
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Jerry
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#6146
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