NOW I know why the interleaving option was included: There is a conditional statement in the WOLF source code : #if INTLV out[k*MSGLENB + (j&7)*10 + ((j&8)>>3) + i*2] = (ushort)b; #else out[k*M
It is, all WSJT source code is available Follow the links from the WSJT website 'jnt On 4 February 2016 at 10:36, Vincent Stallbaum <[email protected]> wrote: Hi All, a Pic or Atmel for pressing left and
I've just completed a write up of my third-method direct audio upconverter, this can be found at http://www.g4jnt.com/ThirdMethodUpconverter.pdf It's an all-analogue design, so probably could be cons
I've just made some tests on the FTDI232 chip at high baud rates. Using a custom routine written in PowerBasic (CC) , I used that language's own interpretation and interface to the driver to pass ar
Hit send too soon ................ mutter, mumble........ The following results were obtained : Requested Frequency Baud rate Generated 3M 146xxx (it wobble
Duh... Must be going doolally in old age. : 1MB/s at two bytes per sample will allow 50kHz sampling absolute max at 3 bytes per sample, 33kHz. 'jnt On 17 February 2016 at 15:30, Andy Talbot <andy.g4
Ok then - so the FTDI-chip based interfaces are the ones to use. In the meantime I got the serial port adapter working at 460800 bits per second (where the communication with the PIC16F1783 looks
Ok then - so the FTDI-chip based interfaces are the ones to use. In the meantime I got the serial port adapter working at 460800 bits per second (where the communication with the PIC16F1783 looks
Can anyone remember what the first claimed 73kHz QSO was . I seem to remember it was a few tens of metres across a car park, probably in 1996 (Strictly, that was a capacitor not radiation, but...)
Wasn't who'd be monitoring, especially on WSPR-15 mode, but I needed some typical listings for the talk, so ran the dual mode WSPR beacon overnight : Extracted from the database : WSPR 2 2016-02-20
Hello all, I can now confirm that the USB <-> UART (RS232) adapters with FTDI work *much* better than the old one with the 'Prolific' chip. At the village's local computer store, we found one labe
As a rule of thumb, the near / far field transition is taken to be lambda/ 2.pi Where the reactive fields are down to below the level of the radiation . So for 137kHz that lies at 350m and for
Yes - sort of. ... ish ... See http://www.g4jnt.com/137tx.pdf No snubbers in sight, all returned to the supply rail 'jnt On 22 February 2016 at 11:50, Paul Nicholson <[email protected]> wrote: Has
Whilst out walking and pondering, as one does.... There are hundreds of designs out there for linear power amps using FETS. They all use a similar design, push-pull with centre tapped ferrite cored
Hello Andy, the advantage of a push-pull class B amplifier is that it it pretty linear at higher power levels. 73, Rik ON7YD - OR7T Van: [email protected] [rsgb_lf_group@yahoo
A single stage class B amplifies the signal over 180 degrees (ie. half the sine). As long as the amplifier is not saturated the amplitude at the output is almost linear proportional to the input amp
Andy: Thanks for doing those checks. I deliberately didn't give my own measurement result, to make sure we didn't influence each other's interpretation, but your 18msec early agrees well with my e
Some years ago I checked the pips on Radio 4 198kHz and on 88MHz GFM against GPS. The long wave ones were coincident to the accuracy I could measure, about 100us, but the VHF ones were about 3ms la
