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I need a fairly easy 500 Mhz to 3 Ghz signal generator schematic Answered


It needs to be fairly simple to make, my resources are a bit low again, and it doesn't have to generator a lot of different frequencies, just one or so within the range of 500 mhz - 3 ghz.

Everything I found on line was either more complex then building a 40 meter transceiver, or was ready built and only cost $200 +

Even if there was a source I could purchase, for under say $30, I would take that too. I need it to test my newest rig.

I don't want to have to resort to something like this project here...

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shouldawoulda (author)2009-04-27

GEEZ,the reason I am here on this site is to try to find out how to build my own variable freq generator from you young brainy's out there, " want to play with one and drive my nieghbors into moving out " I have no idea how too and was hoping I wouldn't have to resort to e-bay. Have a bunch of dis-assembled TV parts just waiting to be put back to work. You guys are so smart ! I have learned a lot from you out theresurely ONE of you has a schem simple enough for us to follow, that is the only input I can put in here, unless you need to plumb a forty story building or a one bath house I am afraid I couldn't help here much.

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Goodhart (author)shouldawoulda2009-04-27

Higher frequencies require care in construction....it is too easy to end up with a lot of noise and parasitics....

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ReCreate (author)2009-04-08

Well,wifi signals are at 2.4GHZ Microwaves generate 2.4GHz signals too bottom line,things that generate signals above 1ghz are expensive,expect to find em at 100+ dollars

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Goodhart (author)ReCreate2009-04-08

aye, but someone that has WiFi would have signals floating about their house, yes?

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ReCreate (author)Goodhart2009-04-08

ahh...umm...yes? what do you mean?

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Goodhart (author)ReCreate2009-04-09

Being that it is Wireless , there would be radio signals in the air for me to detect, if my detector is working, right?

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ReCreate (author)Goodhart2009-04-09

Ah yes,but to receive those signals in the first place you need an antenna of certain shape and size.

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Goodhart (author)ReCreate2009-04-09

The detector I have should be able to detect the presence of frequencies between 500 mhz & 3 ghz ( I think it is 3...or was it 2 ???)

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ReCreate (author)Goodhart2009-04-09

I have never seen anything that goes to 3GHZ,the highest i have ever seen is 2.8GHZ,and i think it was some sort of prototype phone or something And your detector,can you show me a pic,it sounds quite interesting

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Goodhart (author)ReCreate2009-04-09

check out the listing for it at Think Geek

I don't see the specs there, but off the package it says detects between 500 mhz & 3 ghz

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ReCreate (author)Goodhart2009-04-10

Wow,who would be paranoid enough to buy that?

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Goodhart (author)ReCreate2009-04-10

Well, I didn't get it so much out of paranoia, but to play with a bit it was going to be my entry into the Hacked ThinkGeek contest, but I didn't have a way to test it....

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ReCreate (author)Goodhart2009-04-10

Can you show me a picture of the one that you have,yourself? The one that you made? Wifi is 2.4GHZ the same with microwaves during operation(maybe 3GHZ?)

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Goodhart (author)ReCreate2009-04-10

I didn't make it I bought the one from them and was going to mod it if I could determine when it was working and when it was not.

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ReCreate (author)Goodhart2009-04-10

so you want to know if the device you bought is working or not?

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Goodhart (author)ReCreate2009-04-11

Yes, that and if it is STILL working after I MOD it :-) mainly

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ReCreate (author)Goodhart2009-04-11

well,2.4GHZ is a very common wireless video camera signal frequency. And that just happens to be the signal that wifi is at too. Maybe to test it,hold it near your wireless router(i hope you have one) and switch it on and off and see if the tester reacts to it. I suppose that would work...

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Goodhart (author)ReCreate2009-04-11

I have a friend that has a wireless....since I don't have one (I would have tested that by now if I did ;-) I will have to wait for my next trip to their house. . . or find a local source...

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ReCreate (author)Goodhart2009-04-11

oh...you don't have a wireless router? thats...unusual...

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Goodhart (author)ReCreate2009-04-11

Not for someone with my income level ;-)

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ReCreate (author)Goodhart2009-04-11

Well...i don't really have a clue on how much those things cost...but i'm sure they aren't too expensive(unless if your buying a hotbrick or something like that) Maybe in the thirties? ,or so? I'm sure you could cough up the money to buy one of those,but i have no clue on how much they cost. In fact,an hdd probably costs half the price or probably a fourth of the price of a wireless router(meaning that when you buy an hdd for your computer ,about a fourth is what the wireless router would cost) But of course,nothing beats good ol cat5 cables!

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Goodhart (author)ReCreate2009-04-11

Wireless would only make sense for me if I had a Laptop or notebook to move about the house with.....this wifeless thing is getting to sound expensive now ;-)

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ReCreate (author)ReCreate2009-04-09

If you want to recive 2.4GHz signals,try a wifi antenna from a wireless card on a computer

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caitlinsdad (author)2009-04-01

I dunno, but you need a controlled audio signal?

http://www.tucows.com/preview/240287#MoreInfo tone generators that use the PC's soundcard.

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Goodhart (author)caitlinsdad2009-04-01

As far as I know, we can not hear tones much above 11 Khz. I need RF signals somewhere in the range of 500 Mhz to 3 Ghz.

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caitlinsdad (author)Goodhart2009-04-02

Yikes, real signal generators are expensive. Can you just take a cheapo walkie talkie and hold down the transmit key? Not sure, maybe 2.4 ghz?

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Goodhart (author)caitlinsdad2009-04-02

I will have to check that out later when I have a bit more time, thanks for the idea...

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Goodhart (author)caitlinsdad2009-04-06

Thanks for trying to help everyone...I appreciate it...

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Goodhart (author)caitlinsdad2009-04-02

Sorry, I just realized my pic and link were a little misleading....

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Goodhart (author)2009-04-05

Alas !


I am not going to get the tester finished in time.....my first 6 attempts failed and I have run out of time.....no entry for me into the Thing Geek contest I guess....

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caitlinsdad (author)Goodhart2009-04-06

Alas ! Did Tommy Edison stop playing around with the lightbulb after 6 attempts? He ran out of time and it was still dark. Goodness gracious, man, keep trying and get that ible out, maybe a little more fiber...

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Goodhart (author)caitlinsdad2009-04-06

Oh I didn't mean I was giving up, but I DID so want it to be in the contest :-(

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Goodhart (author)2009-04-01

Well, I guess I am asking a bit much....

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Goodhart (author)guyfrom7up2009-04-06

Thanks for trying to help everyone...I appreciate it...

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Goodhart (author)guyfrom7up2009-04-01

Square, sine, whatever as long as the frequency range is somewhere between 500 Mhz, and 3 Ghz.

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Goodhart (author)NachoMahma2009-04-06

Thanks for trying to help everyone...I appreciate it...

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Goodhart (author)NachoMahma2009-04-02

NICE, thanks, I will look into that further this weekend.

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