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Author Topic: Part 15 MW Tansmitter Kit on eBay  (Read 814 times)

Offline ChrisSmolinski

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Part 15 MW Tansmitter Kit on eBay
« on: January 18, 2020, 1150 UTC »
$24 shipped from Thailand: https://www.ebay.com/itm/531-to-1602-kHz-Low-power-AM-PLL-transmitter-kit-for-learning/153799136672

It includes crystals for both 9 and 10 kHz channel spacing. From a review I read elsewhere, it puts out about 70 mW, and goes up to 1710 kHz.
Chris Smolinski
Westminster, MD
eQSLs appreciated! csmolinski@blackcatsystems.com
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Offline ThaDood

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Re: Part 15 MW Tansmitter Kit on eBay
« Reply #1 on: January 18, 2020, 1751 UTC »
NEAT!!!! And, if you want to build a Part #15 compliant antenna for this, Bob at MRAM1500, shows how to do this.   http://mram.us/AntennaStory.htm
I can't decide upon what's worst, young and stupid, or old and chemically dumbed down.

Offline flexoman61

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Re: Part 15 MW Tansmitter Kit on eBay
« Reply #2 on: January 19, 2020, 1157 UTC »
Bummer, says listing has ended.
Please QSL to: flexoman61@gmail.com
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Offline Σ

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Re: Part 15 MW Tansmitter Kit on eBay
« Reply #3 on: January 19, 2020, 1235 UTC »
This seller restocks this item often so check back in a week or so.
Σ
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Offline ChrisSmolinski

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Re: Part 15 MW Tansmitter Kit on eBay
« Reply #4 on: January 19, 2020, 1313 UTC »
Chris Smolinski
Westminster, MD
eQSLs appreciated! csmolinski@blackcatsystems.com
netSDR / AFE822x / AirSpy HF+ / KiwiSDR / 670 ft horizontal loop / 500 ft northeast beverage / 58 ft T2FD / 120 ft T2FD/ 300 ft south beverage / 43m / 20m / 10m  dipoles / Crossed Parallel Loop / Discone in a tree

Offline purplesky

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Re: Part 15 MW Tansmitter Kit on eBay
« Reply #5 on: January 19, 2020, 1437 UTC »
But beware. Output amplifier operates in Class C. Don't think about amplifying this thing

Offline JimIO

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Re: Part 15 MW Tansmitter Kit on eBay
« Reply #6 on: January 19, 2020, 1543 UTC »
It has 3 switch selectable low pass filters after the final. Amplify then high level modulation would be the way to go if you wanted more power.

~

Offline Stretchyman

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Re: Part 15 MW Tansmitter Kit on eBay
« Reply #7 on: January 19, 2020, 1608 UTC »
The 'way to go' would be to buy a proper transmitter in the first place!

I don't get this Part 15 thing?

70mW and you're trying to amplify it...why bother?

I ask you!

 ;)

Str.
'It's better to give than receive' so why RX when you can TX!

                            Buy one from me, NOW!

Great discounts on ALL my transmitters if purchased via HFUnderground


                                              ;)

Offline ChrisSmolinski

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Re: Part 15 MW Tansmitter Kit on eBay
« Reply #8 on: January 19, 2020, 1615 UTC »
The 'way to go' would be to buy a proper transmitter in the first place!

I don't get this Part 15 thing?

70mW and you're trying to amplify it...why bother?

I ask you!

 ;)

Str.

Some people want to run a legal Part 15 transmitter, to cover a small area, un-amplified. You're allowed 100 mW and a 3 meter antenna, so 70 mW is legal. Avoids getting The Knock  :)
Chris Smolinski
Westminster, MD
eQSLs appreciated! csmolinski@blackcatsystems.com
netSDR / AFE822x / AirSpy HF+ / KiwiSDR / 670 ft horizontal loop / 500 ft northeast beverage / 58 ft T2FD / 120 ft T2FD/ 300 ft south beverage / 43m / 20m / 10m  dipoles / Crossed Parallel Loop / Discone in a tree

Offline TonyD

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Re: Part 15 MW Tansmitter Kit on eBay
« Reply #9 on: January 19, 2020, 1902 UTC »
It is actually a cool little oscillator. Got mine in kit form a few years ago and it worked a charm. Check out..

https://www.amateurradioshop.nl/webshop/bouwkits/hf/detail/41/am-pll-middengolf-oscillator-bouwkit.html

Or just build your own.  http://www.tompolk.com/radios/frequencysynthesizer/freqsynth.html

There are a lot more schematics floating about for this. Must dig them out.

Radio Sovereign 1494 kHz AM,
North East Coast ROI.

Reports to 1494radio@gmail.com  :)

Offline N9QIW

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Re: Part 15 MW Tansmitter Kit on eBay
« Reply #10 on: March 14, 2020, 0406 UTC »
I bought (and received) one of these kits from E-Bay.   Unfortunately,  no schematic was provided with the kit.  Does anyone have a link to a good schematic, pdf, etc?   
Alex
N9QIW
Fresno, CA USA

Offline N9QIW

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Re: Part 15 MW Tansmitter Kit on eBay
« Reply #11 on: March 14, 2020, 0417 UTC »
Cancel that.  I think this is the correct schematic: https://drive.google.com/file/d/12Yjb3Vw2Dr0Qa4AUOGLJELPkQlfi7KyV/view

Alex
N9QIW
Fresno, CA USA

Offline Teotwaki

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Re: Part 15 MW Tansmitter Kit on eBay
« Reply #12 on: March 20, 2020, 1323 UTC »
NEAT!!!! And, if you want to build a Part #15 compliant antenna for this, Bob at MRAM1500, shows how to do this.   http://mram.us/AntennaStory.htm

It seems that url just needs the "WWW" to work:  http://www.mram.us/AntennaStory.html

I also ran across some related sites  8)

https://vk.com/realfreeradio
https://mbcf.boards.net/thread/315/question-mram-1500
Jim
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Offline ThaDood

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Re: Part 15 MW?
« Reply #13 on: March 22, 2020, 1829 UTC »
While you're on this Part 15 kick, here's another site,   http://boomerthedog.net/radio.html

I can't decide upon what's worst, young and stupid, or old and chemically dumbed down.

Offline Teotwaki

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Re: Part 15 MW?
« Reply #14 on: March 23, 2020, 0324 UTC »
While you're on this Part 15 kick, here's another site,   http://boomerthedog.net/radio.html

Thanks for that link! I really liked the low power AM transmitter in a box.

Jim
NRD-525, Elecraft KX3 and Elecraft PX3 Spectrum Display
76' end fed long wire & 66' off-center fed dipole for 10/20/40 meters
Orange County, SoCal, The better half