attention POTA SOTA OPs: save 90 percent battery drain on transmitter PA by using a Pulse Density Modulated CW(PDM-CW) Generator by chatGPT C CODE - Live DEMO @30wpm

[Chuck aa0hw]

save 90 percent of your final power amp's battery drain using PDM-CW

instead of sending the full cw element length to the final PA,

PDM-CW sends 1 ms pulses per every 10 ms of cw element instead...

the receiver software patches back in the missing breaks in each cw element,

restoring the original CW ELEMENT length

here is the initial code generated by chatGPT 3.5:

https://u.pcloud.link/publink/show?code=XZV8A70ZeJWMJa2iiNfWU61gvhE...

[Chuck aa0hw]

here is another example of saving battery power using both PDM-CW and CW ELEMENT REDUCTION by negative compensation of 30ms, which gets restored back to normal cw element length at receiver by cw regen app reagate

brief demo of reducing cw elements, dit & dah, by 30 milliseconds each, to save battery power during portable operations...this example is using Through The Earth CAVE to SURFACE transmit at 4khz via SOUND CARD sdr the RECRI CW KEYBOARD can trim off 30 milliseconds(or more) from each CW ELEMENT, dit & dah by the same amount of reduction, which helps to save battery drain on transmitter...

at the RECEIVER site, using the SAME SIDECHAIN GATE vst plugin, REAGATE, the missing 30 ms from each incoming RX cw elements are easily restored by using CW REGENERATION METHOD: audio volume threshold TO midi note output :: to CW MIDI INPUT CW KEYER CPO with cw audio output

https://github.com/recri/keyer

https://www.reaper.fm/reaplugs/

the TRANSMITTER is using 90uS(micro second) square wave monophasic pulses instead of continuous sine waves from a chatGPT square wave app written in c code: https://u.pcloud.link/publink/show?code=XZOfdy0Zxfw3pVL0n0VgxSKge7X... 

[Chuck aa0hw]

Here is another example of Pulse Density Modulated CW(PDM-CW)

Pulse Density Modulated CW, 50 μS pulse every 30ms for duration of each CW ELEMENT, VLF band example

save battery drain for portable operations; this test was at 28kHZ for Through The Earth(TTE) Radio Comms using a TX/RX TWiN COiL FERRiTE ROD ANTENNA

PDM-CW encoder uses a C CODE program written by chatGPT here:

https://u.pcloud.link/publink/show?code=XZEA7p0ZC9WRhz6fai4pEQuEUG8...

the pdm-cw encoder is 'keyed' by a CW KEYER's output; for the duration of each CW ELEMENT key'D by the CW KEYER, it outputs a 50 μS pulse every 30ms for the duration of each CW ELEMENT...this C CODE output is used to 'key' a sidechain gate on a REAGATE PDM-CW encoder which is used to allow 50 μS pulses of 28Khz sinewaves to pass through the PDM-CW REAGATE encoder and go through the sound card output to a CLASS D audio amp input, audio AMP output to the input of a 4/1 step down FERRITE TRANSFORMER to the input of the TWIN COIL FERRITE ANTENNA: diy TWiN COiL Ferrite Rod TRANSMIT/receive antenna derived and modified from C.CRANE's twin coil ferrite rod antenna google patents article here: https://patents.google.com/patent/US6529169B2/en

the PDM-CW Decoder reverses the process...and replaces the gaps between the pulses to restore fully each cw element and re-key's it by a cw midi message, a new cw note output that key's a midi cw keyer input from recri keyer: https://github.com/recri/keyer