Скачать с ютуб Using the LOXJIE A10 60 Watt Class-D Audio Amplifier as a 96Khz LF Band CW Transmitter AMP в хорошем качестве

Using the LOXJIE A10 60 Watt Class-D Audio Amplifier as a 96Khz LF Band CW Transmitter AMP

this is a follow up from the previous video    • Using the LOXJIE A10 60 Watt Class-D ...   in this video, a test for how well the LOXJIE A10 audio amp can operate as an LF BAND AMP, at the sound card's highest LF BAND frequency limit of 96 Khz for sending CW is setup and tested... the PC's native MOBO sound card was set to 192Khz to enable direct 96Khz CW generation by the AD5DZ CW KEYER APPs https://github.com/recri/keyer the LF RF 96Khz output of the PC's sound card goes to the input of the LOXJIE A10 Amplifier, the output of the LOXJIE A10 Amplifier goes to the input of a 4/1 ferrite impedance transformer, the output of the ferrite transformer is - series cap tuned - to peak resonance and highest LF RF OUTPUT at 96Khz for maximum CW LF RF current through the compact 21 foot long Delta Loop Transmit Antenna(a VERY inefficient length for 96Khz LF BAND...yet still strong enough to produce a very strong LF RF EMF RX signal in the RX ANTENNA(s) despite the very low EIRP output of the short delta loop wire antenna) RX antenna(s) - TUNED TWIN COIL FERRITE ROD connected directly to the recording laptop's STEREO MIC JACK INPUT...and a 2nd passive tuned ferrite rods/airdux coil RX antenna is in close proximity to the 1st TX antenna, significantly increasing the RX pickup LF RF signal from the transmitter into the LAPTOP's mic jack input circuit DEMOD SDR APPs by AD5DZ https://github.com/recri/keyer NOTE: this LOXJIE A10 AUDIO AMP comes with its own power supply - 19 volts at 6 amps - one of the higher powered - voltage power supplies - with enough current/voltage, to reach the advertised power output ratings...of the CLASS-D AUDIO AMPS i have tried from AMAZON, i had to send 2 of them back - total fail...so... so far...i am happy with this LOXJIE A10...for being able to operate in the LF BAND up to the sound card limit of 96 Khz...and at a high power output into the ANTENNA you have to be careful with the LOAD, 2 2 ohm resistors are being used to provide "enough" load to the amp so it does not shut down from its protective circuit...AND...you have to select your TUNING caps carefully...OR...they will get HOT ! and their voltage rating must be high enough at least 100 volts or more...so you don't blow them out from the high current, high Q tuned delta loop antenna...even with that BIG BROWN CAP(shown in video) - .25 uF, it is still getting WARM...so i should replace it with a better CAP brand