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Small amp
I've bought both of these kits but haven't built either one yet. https://www.rv3yf.store/collections/power-amplifiers/products/power-amplifier-for-hf-amateur-transceiver-40-watts https://www.qrp-labs.
I've bought both of these kits but haven't built either one yet. https://www.rv3yf.store/collections/power-amplifiers/products/power-amplifier-for-hf-amateur-transceiver-40-watts https://www.qrp-labs.
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By
n2vdy
· #77750
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DAC/ADC for PI, might be useful here
I opted for the Audio injector Ultra sound card instead.
I opted for the Audio injector Ultra sound card instead.
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By
n2vdy
· #65631
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Modular uBitx - "Ex: Harmonics"
I am thinking of doing something similar but using an SBC for the DSP processing. I have a Raspberry Pi 3B+, an Odroid XU4, and an Amlogic S905 board to test with. I have this sound card coming. https
I am thinking of doing something similar but using an SBC for the DSP processing. I have a Raspberry Pi 3B+, an Odroid XU4, and an Amlogic S905 board to test with. I have this sound card coming. https
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By
n2vdy
· #57211
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One question only...
Can't speak about all the Russians on eBay but after seeing some stuff there I ended up buying from https://www.rv3yf.store and got everything I expected to get. One thing to note. The filter kits I b
Can't speak about all the Russians on eBay but after seeing some stuff there I ended up buying from https://www.rv3yf.store and got everything I expected to get. One thing to note. The filter kits I b
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By
n2vdy
· #55942
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Keypad for Raduino...?
I like the idea of the resistor matrix. I might have copied it if I hadn't gone a different way already. This little board from Sparkfun can do up to an 8x8 matrix, has debounce built in, uses I2C, an
I like the idea of the resistor matrix. I might have copied it if I hadn't gone a different way already. This little board from Sparkfun can do up to an 8x8 matrix, has debounce built in, uses I2C, an
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By
n2vdy
· #53067
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Nextion Display
Congratulations. And I can do all that without learning to write and compile GUI programs under Windows or Linux? Or this RPI OS you mention? Also, I prefer wxWidgets so you should use that instead.
Congratulations. And I can do all that without learning to write and compile GUI programs under Windows or Linux? Or this RPI OS you mention? Also, I prefer wxWidgets so you should use that instead.
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n2vdy
· #51182
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Nextion Display
True but that wasn't the question. I'm sure your way works great for you though.
True but that wasn't the question. I'm sure your way works great for you though.
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By
n2vdy
· #51179
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Nextion Display
With the Nextion display you don't draw buttons in code. There is a program that you run that you use to design the screens that are shown on the display. Then you are just passing data back and forth
With the Nextion display you don't draw buttons in code. There is a program that you run that you use to design the screens that are shown on the display. Then you are just passing data back and forth
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By
n2vdy
· #51174
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Raduino oscilators. 33mhz and 57mhz " . Documentation says one thing, but this is what I measured.
According to the documentation the 1st oscillator tunes from 45 to 75 MHz to receive 0 to 30 MHz. Since the oscillator is higher than the received frequency this inverts the sidebands. LSB becomes USB
According to the documentation the 1st oscillator tunes from 45 to 75 MHz to receive 0 to 30 MHz. Since the oscillator is higher than the received frequency this inverts the sidebands. LSB becomes USB
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By
n2vdy
· #43918
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Matched xtals
#ubitx
#bitx40
On the rv3yf page there is a link to a manual for the Klopik radio. The schematic for the filter is the same. There are YouTube videos showing the radios in use. On Mon, Jan 15, 2018 at 05:51 pm, Arv
On the rv3yf page there is a link to a manual for the Klopik radio. The schematic for the filter is the same. There are YouTube videos showing the radios in use. On Mon, Jan 15, 2018 at 05:51 pm, Arv
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By
n2vdy
· #39370
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Matched xtals
#ubitx
#bitx40
The documentation says 700 to 2500. It is a 4 pole filter at just under 9 MHz.
The documentation says 700 to 2500. It is a 4 pole filter at just under 9 MHz.
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By
n2vdy
· #39362
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Matched xtals
#ubitx
#bitx40
I have a Russian radio kit I haven't put together yet called the Druzhba-M. It has a crystal filter with varactor diodes that it uses to vary the bandwidth of the filter.
I have a Russian radio kit I haven't put together yet called the Druzhba-M. It has a crystal filter with varactor diodes that it uses to vary the bandwidth of the filter.
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By
n2vdy
· #39354
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