Transmitter - Electronic Circuits Projects Diagrams Free

zachtheterrible · 24th July 2004, 05:14 PM

I've got me a problem w/ an FM transmitter. Yes, this is the same transmitter as in my previous posts. I figured out the frequency drift problem . . . I thought I had a fresh battery, come to find out it's putting out 5 volts

ops: .

Neways, the new problem that I am having is that my transmitter can be heard crystal clear as long as I'm within about 30 feet of the transmitter. Sometimes I have to be within a foot. What is the shortest that I can make my antenna if the transmitter is working @ 88-108 MHZ? I built this same transmitter before and it worked 1/4 a mile away.

Gaston · 25th July 2004, 02:24 PM

is this something that needs to have a small antena? if not you can make a real antena that would transmit a lot better. and if you want to transmit in one direction you can make it directional

zachtheterrible · 25th July 2004, 03:43 PM

Yeah, it's just 1 of those 9 volt 2 transistor transmitters. I need something small as possible w/ good performance.

Vaibhav Birit · 5th August 2004, 09:55 AM

As far as the frequency drift is concerned, you can correct that by shielding your transmitter in a metal case.

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24th July 2004, 05:14 PM	(permalink)
zachtheterrible	Transmitter I've got me a problem w/ an FM transmitter. Yes, this is the same transmitter as in my previous posts. I figured out the frequency drift problem . . . I thought I had a fresh battery, come to find out it's putting out 5 volts ops: . Neways, the new problem that I am having is that my transmitter can be heard crystal clear as long as I'm within about 30 feet of the transmitter. Sometimes I have to be within a foot. What is the shortest that I can make my antenna if the transmitter is working @ 88-108 MHZ? I built this same transmitter before and it worked 1/4 a mile away. __________________ I'm no electronics god, i just talk too much.

25th July 2004, 02:24 PM	(permalink)
Gaston	is this something that needs to have a small antena? if not you can make a real antena that would transmit a lot better. and if you want to transmit in one direction you can make it directional

25th July 2004, 03:43 PM	(permalink)
zachtheterrible	Yeah, it's just 1 of those 9 volt 2 transistor transmitters. I need something small as possible w/ good performance. __________________ I'm no electronics god, i just talk too much.

5th August 2004, 09:55 AM	(permalink)
Vaibhav Birit	FM transmitter As far as the frequency drift is concerned, you can correct that by shielding your transmitter in a metal case. __________________ www.vaibhavbirit.bravehost.com