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Electronics on the Floor: VHF transmitters from crystal oscillator modules

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Amateur Radio VK3YE

Amateur Radio VK3YE

Күн бұрын

Пікірлер: 33
@tahpluvideo8505
@tahpluvideo8505 3 жыл бұрын
Thanks Peter. I have a 50 MHx module that I want to use in an up converter for an RTL-SDR dongle. I was trying to figure out the pin-out. You are the only one who explains it clearly. 73 Bill N2CQR
@edwinklaver
@edwinklaver 6 жыл бұрын
Cool project Peter. I like it when you post this sort of thing. 73!
@vk2ig
@vk2ig 6 жыл бұрын
Very good, Peter ... another of your videos which has got me thinking about how I can use some of the parts in the "junk box". Cheers, Mike VK2IG
@mimoslavija
@mimoslavija 3 жыл бұрын
Can i use several oscillators connected in parallel for better transmitting range
@triangleenjoyer
@triangleenjoyer 6 жыл бұрын
Fantastic! Lots of inspiration here.
@joeblow8593
@joeblow8593 3 жыл бұрын
Amazing stuff
@OldF1000
@OldF1000 6 жыл бұрын
These could be used in hidden transmitter hunts Add a voice recorder chip for voice ID
@vk3ye
@vk3ye 6 жыл бұрын
Good idea. Don't even need a voice recorder. Check out the next video.
@themimic7831
@themimic7831 3 жыл бұрын
Do 2 pin oscillators work for this?
@eddyyu7091
@eddyyu7091 Жыл бұрын
Quite curious ! How long can this kinda module reach?
@movecizetodobryfilm
@movecizetodobryfilm Жыл бұрын
Hello Peter! How tune the both capacitors and coils for 147 MHz? 🤔
@vk3ye
@vk3ye Жыл бұрын
Use a receiver or VNA on 147 MHz and tune for max strength.
@movecizetodobryfilm
@movecizetodobryfilm Жыл бұрын
@@vk3ye Okay, thanks! 73
@movecizetodobryfilm
@movecizetodobryfilm Жыл бұрын
When we build LC circuit to oscillator for example 3...4...5 harmonic (oscillator is 1st frequency = 28MHz) and we turn LC to 5th harmonic =140MHz and antenna create to 2m band, can we receive for example 3 harmonic 1km distance? Maybe if we build LC on one frequency therefore we attenuation another frequency? I want use cristal oscillator use for 70cm band, so... Can I use 27,027MHz and 16th harmonic with LC filter (27,027x16=432,432MHz)? Maybe 16th harmonic with LC will be not strong enough? And this transmitter with LC filter create something strong besides 432MHz? (example 5th harmonic 135MHz?) 73!
@vk3ye
@vk3ye Жыл бұрын
@@movecizetodobryfilm Yes. Output will be dirtier the more times you try to multiply. Multiple or cavity filters will help fix this but are heavy, expensive or tricky to align.
@movecizetodobryfilm
@movecizetodobryfilm Жыл бұрын
@@vk3ye OK, thank You for knowledge. So what are I doing if I want generate quite good signal in 430-440MHz and use cristal or cristal oscillator and some parts?
@JxH
@JxH Жыл бұрын
1:51 "16.381" Looks like 16.384, = 2^14 kHz, a very common clock frequency. Cheers.
@andrewferg8737
@andrewferg8737 3 жыл бұрын
Question: Can I use the square wave itself as the carrier, or would it be better to convert it to a sine wave with an RC filter and amplifier before injecting it into the transformer? Great video, by the way!
@vk3ye
@vk3ye 3 жыл бұрын
Sorry, I don't understand your question. Which transformer?
@seyedmarashi
@seyedmarashi 5 жыл бұрын
amazing video, Thanks.... what is max. frequency that we able to make with this Crystals after Multiplying? for example via 100Mhz crystal are we able to make 1.6Ghz az your schematic or we need special transformers or coil or something like Amplifier..
@ivanlam5783
@ivanlam5783 6 жыл бұрын
Can you design a dsb transceiver for 6m using the appropriate crystal module, like the beach 40...?
@vk3ye
@vk3ye 6 жыл бұрын
You could by tapping off a harmonic from the module and feeding it to an NE602 balanced modulator or similar. But it wouldn't be frequency agile. Unless you do a premix VFO arrangement like I did with my 27 MHz CB BFO.
@ivanlam5783
@ivanlam5783 6 жыл бұрын
@@vk3ye Thank you, I'll think about it...
@organman42
@organman42 5 жыл бұрын
Is it possible to pull the frequency of the module?
@vk3ye
@vk3ye 5 жыл бұрын
Only very slightly eg by varying its supply voltage as can be used to transmit FM.
@stephenwilliams5201
@stephenwilliams5201 5 жыл бұрын
Some osc's were used as they went as low 80 meters you are right any board is worth investigating as I'm a qrpp operator. Kv4li ps keep the harmonics as low as you can. USA it's 40 db and down.
@damiancannone1
@damiancannone1 6 жыл бұрын
What kind of antenna did you use for the transmitter?
@vk3ye
@vk3ye 6 жыл бұрын
Vertical about 5m above the ground
@alexramos2568
@alexramos2568 5 жыл бұрын
Your videos contents are great, but why the picture quality so bad?
@tdumnxy
@tdumnxy 6 жыл бұрын
Very interesting but I can't play until I have a UK Intermediate licence. I found this video via my subscription feed but it doesn't appear on your channel page? (Either home or videos tab.)
@AB-zw5xx
@AB-zw5xx 3 жыл бұрын
Good god, man...get a manicure!
@pratwurschtgulasch6662
@pratwurschtgulasch6662 4 жыл бұрын
thank you for killing my ears in the beginning of the video
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