Go Down

Topic: 2 meter fm reciever (Read 428 times) previous topic - next topic

MountainmanADK

i am planing on building a aprs igate from chapter 7 of "ham radio for arduino and picaxe" book. It uses argent data radio shield which takes audio from a 2 meter receiver. Code at http://hamradioprojects.com/authors/dl8rds/+airgate/code/  or http://qth.me/dl8rds/+airgate/code
shield info at http://wiki.argentdata.com/index.php?title=Radio_Shield

My goal is to integrate a fm receiver to the stack. I have found many projects on the web using tda7000 ic for receiving broadcast fm radio. i don't know enough to know if modifying this circuit would work. Can i just adjust the LC to match for the 144.39Mhz. any help constructing a small fm receiver for that frequency would be appreciated. I also assume i will need some kind of AF amp before inputting into the argent radio shield.

AWOL

Probably easier/cheaper to use a Baofeng 2 metre handheld.
"Pete, it's a fool (who) looks for logic in the chambers of the human heart." Ulysses Everett McGill.
Do not send technical questions via personal messaging - they will be ignored.
I speak for myself, not Arduino.

MarkT

TDA7000 input frequency rating is upto 110MHz only.  I also doubt the VFO would be stable enough for
narrowband FM and you have no solution for SSB with that chip AFAICT.
[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]

Geek Emeritus

search term: RTL-SDR radio. the cheapest one on eBay does what you want:

the cheapest RTL-SDR on eBay

All PMs will be deleted unopened due to arrogant argumentative pot stirring Malfoys.
 If you have not read "How to use this forum - please read", in particular: "7. If you are posting code or error messages, use "code" tags":  expect rude responses

MountainmanADK

Thanks I know cheap radios are out there but it's not about the money. Looking to learn and I only need fm receive capability for this project. Found documentation on mc3363 that looks like it could be possible???

MarkT

Looks pretty capable, but all the support components like tuned circuits and filters and crystals make for
a complex build that requires RF alignment with suitable testgear - its not an out-of-the-box solution
unless someone already does a 2m module using it.
[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]

Grumpy_Mike

This page has a project that will show you what is involved:-
http://pages.suddenlink.net/wa5bdu/2M_RX.html

MountainmanADK

Thank you grumpy_mike this is what I was looking for

Go Up