Low Power portable FM transmitter

[jtspang]

Basically what I'm after is a slightly juiced up version of many of
the FM transmitters for use in cars with a portable device (in this
case, my ipod). I don't need to be able to adjust the frequency, and
my only problem with the stuff on the market is the signal is too
weak, so any nearby station (both in band and literally) gives off a
lot of interference. I want something powerful enough in a little
used part of the FM spectrum (i.e. ~ 88.9mHz or something) that I'll
never get overpowered. This has the dual benefit of when on road
trips, my buddies in the car behind me can also tune in to my ipod.
What would be the simplest way to build this? I heard that an NE 564
PLL chip might be the way to go, but I'm not all familiar with it.
Thanks,
JT

 

[Paul Burridge]

On 11 Nov 2004 14:28:33 -0800, jtspang@gmail.com (jtspang) wrote:

Basically what I'm after is a slightly juiced up version of many of
the FM transmitters for use in cars with a portable device (in this
case, my ipod). I don't need to be able to adjust the frequency, and
my only problem with the stuff on the market is the signal is too
weak, so any nearby station (both in band and literally) gives off a
lot of interference. I want something powerful enough in a little
used part of the FM spectrum (i.e. ~ 88.9mHz or something) that I'll
never get overpowered. This has the dual benefit of when on road
trips, my buddies in the car behind me can also tune in to my ipod.
What would be the simplest way to build this? I heard that an NE 564
PLL chip might be the way to go, but I'm not all familiar with it.

Thank God for that, then!
What miserable, crummy sh*t do you intend to inflict on the general
population with your new toy? 24hr "Rap Music"??? No thanks!
--

"What is now proved was once only imagin'd." - William Blake, 1793.

 

[Luhan Monat]

jtspang wrote:

Basically what I'm after is a slightly juiced up version of many of
the FM transmitters for use in cars with a portable device (in this
case, my ipod). I don't need to be able to adjust the frequency, and
my only problem with the stuff on the market is the signal is too
weak, so any nearby station (both in band and literally) gives off a
lot of interference. I want something powerful enough in a little
used part of the FM spectrum (i.e. ~ 88.9mHz or something) that I'll
never get overpowered. This has the dual benefit of when on road
trips, my buddies in the car behind me can also tune in to my ipod.
What would be the simplest way to build this? I heard that an NE 564
PLL chip might be the way to go, but I'm not all familiar with it.
Thanks,
JT

Hi,

There used to be a (legal) product called "Mr. Microphone" - several
hundred foot range if I recall. It worked on the FM band.


--
Luhan Monat: luhanis(at)yahoo(dot)com
http://members.cox.net/berniekm
"The Future is not what it used to be..."

 

[Andrew Holme]

jtspang wrote:

Basically what I'm after is a slightly juiced up version of many of
the FM transmitters for use in cars with a portable device (in this
case, my ipod). I don't need to be able to adjust the frequency, and
my only problem with the stuff on the market is the signal is too
weak, so any nearby station (both in band and literally) gives off a
lot of interference. I want something powerful enough in a little
used part of the FM spectrum (i.e. ~ 88.9mHz or something) that I'll
never get overpowered. This has the dual benefit of when on road
trips, my buddies in the car behind me can also tune in to my ipod.
What would be the simplest way to build this? I heard that an NE 564
PLL chip might be the way to go, but I'm not all familiar with it.
Thanks,
JT

A PLL will give better frequency stability not more power. This may help
because single transistor VHF oscillators tend to drift.

A little power goes a long way at VHF.

Is your transmitting antenna external to the vehicle?

This is a good kit http://www.northcountryradio.com/Kitpages/mpx96.htm

 

[Dbowey]

jtspang posted:

(snip)

<< There seems to be a lot of semantics and prejudgement going on around
here, and I don't mean just this thread. Who cares what I want it
for, or why I'm interested in it, or what I might "inflict" on anyone
(or no one, in this case). This is for me, and my best friend so we
can listen to the same music on road trips in two cars.

So please, anyone with a simple circuit using a PLL (doesn't have to
be tunable) that accepts a stereo input I would love to see it, as I'd
like to start building a testing different configurations. As was
brought to my intention earlier, a 5 watt transmitter is way too big.
I just want a max range of like 300-500 feet.

Anyone else who wants to scold, deride, disillusion, or otherwise
discourage this, kiss my @ss. This group is supposed to be about
helping out one another, not browbeating someone who is more
interested in building the circuit than using it. >>

It appears to me that you are mistaken.

• This group owes you nothing.

• Your wish to be irresponsible (indifferent to others and to Federal Law)
does not impose a mandate for others to ascede to your wants.

Go tell your parents they should not have pandered to your tantrums, but should
have taught you self restraint.

You may kiss my ass.

Thanks,
DB

 

[Paul Burridge]

On 16 Nov 2004 07:48:57 -0800, jtspang@gmail.com (jtspang) wrote:

There seems to be a lot of semantics and prejudgement going on around
here, and I don't mean just this thread. Who cares what I want it
for, or why I'm interested in it, or what I might "inflict" on anyone
(or no one, in this case). This is for me, and my best friend so we
can listen to the same music on road trips in two cars.

It's not prejudgment; it's based on what you yourself initially
wrote:

Basically what I'm after is a slightly juiced up version of many of
the FM transmitters for use in cars with a portable device (in this
case, my ipod). I don't need to be able to adjust the frequency, and
my only problem with the stuff on the market is the signal is too
weak, so any nearby station (both in band and literally) gives off a
lot of interference. I want something powerful enough in a little
used part of the FM spectrum (i.e. ~ 88.9mHz or something) that I'll
never get overpowered.

Here you have the nerve to refer to licensed stations as potentially
causing you "interference" and you want to ensure you "never get
overpowered."
That would be funny were it not so monumentally arrogant.
--

"What is now proved was once only imagin'd." - William Blake, 1793.

 

[John Fields]

On 16 Nov 2004 07:48:57 -0800, jtspang@gmail.com (jtspang) wrote:

There seems to be a lot of semantics and prejudgement going on around
here, and I don't mean just this thread. Who cares what I want it
for, or why I'm interested in it, or what I might "inflict" on anyone
(or no one, in this case). This is for me, and my best friend so we
can listen to the same music on road trips in two cars.

So please, anyone with a simple circuit using a PLL (doesn't have to
be tunable) that accepts a stereo input I would love to see it, as I'd
like to start building a testing different configurations. As was
brought to my intention earlier, a 5 watt transmitter is way too big.
I just want a max range of like 300-500 feet.

Anyone else who wants to scold, deride, disillusion, or otherwise
discourage this, kiss my @ss. This group is supposed to be about
helping out one another, not browbeating someone who is more
interested in building the circuit than using it.

---
Hey, asshole, if you're so hot for that little piece of technology get
yourself down to your nearest public library and hit the books. Or
get off your lazy, self-indulgent ass and find a website with how to
do it on it.

As you were told before, nobody here owes you a goddam thing, so if
you have a problem with that, piss off.

Get a fucking clue; nobody wants to help your sorry ass because you're
an irresponsible twat who hasn't the slightest concern for the rights
of others.

--
John Fields

 

[John Fields]

On 17 Nov 2004 08:04:41 -0800, jtspang@gmail.com (jtspang) wrote:

John Fields <jfields@austininstruments.com> wrote in message news:<3l4lp09jfg1stc7cnesrcofiopcfasol1o@4ax.com>...

Hey, asshole, if you're so hot for that little piece of technology get
yourself down to your nearest public library and hit the books. Or
get off your lazy, self-indulgent ass and find a website with how to
do it on it.

As you were told before, nobody here owes you a goddam thing, so if
you have a problem with that, piss off.

Get a fucking clue; nobody wants to help your sorry ass because you're
an irresponsible twat who hasn't the slightest concern for the rights
of others.


Dear god (From your posts I assume that's how you want to be
addressed),

---
Capitalize, please.
---

I am looking other places, however, I find you get better answers by
asking more than one source.

---
Not necessarily; all you get is, possibly, more answers. The quality
of the information you receive has little to do with the quantity of
information received. You, however, are between a rock and a hard
place because you can't differentiate between good information and
bad.

If I could find a website that had the circuit I'm looking for,
I wouldn't have posted in the first place.

---
I suspect that had you accessed a website with precisely the circuit
you needed, you wouldn't have known it and would have eventually wound
up here asking "Will this work?"
---

But I decided, instead of trying to reinvent the wheel,

---
Don't be absurd. If you knew how to "reinvent the wheel" in the first
place, you would have just built your little machine and been on your
merry way, playing "mobile DJ" for your entourage of idiots and
polluting that 1000' circle, with no one the wiser except the traffic
around you. As it is, you've been reduced to begging for you what you
want and defending your position for wanting it over and over again,
to no avail.
---

maybe someone else has already done what I'm trying to do. I'll just ask.
Can't hurt, right?

---
So far, the only one who's been hurt in this exchange is you, so if
that doesn't matter then you're right.
---

Surely the good people at sci.electronics.design can
tell me what I need to know.

---
You clearly don't _need_ to know, you _want_ to know, and Mick sez you
can't always get what you want.
---

And some of them can.

---
Certainly some of us _can_ tell you, but just because we can doesn't
mean we _have_ to. It's up to our individual discretion whether we do
or not, and so far it looks like you're pissing in the wind.
---

Those of you who
have avoided the thread but emailed me some ideas, I appreciate it.

---
Perhaps you do, but judging from the fact that you're back I'd say you
either didn't get much help or what you did get was beyond you.
---

I posted here because I thought that it was a forum where maybe someone
who knows about this stuff could point me in the right direction. I
can see that I was mistaken about that.

---
You're mistaken about being mistaken about that. The _good_ advice
you got was to get a Mr. Microphone and adapt that to your needs.
Another piece of good advice you got was to read Part 15 of the FCC
rules and regs, and yet another piece of advice was to abandon the
"project", none of which you elected to follow as evidenced by the
fact that you're back again whining about that everybody's being sooo
mean to you, poor baby...
---

Why impart any knowledge when you can lecture.

---
Lecturing _is_ imparting knowledge, at least to those who care to
listen. What you want is _information_, a totally different thing.
---

How does what I want impune your rights?

---
It's "Impugn", and your desire to break the law for your own
convenience challenges as false my right to believe that the law
applies to you in the same measure as it applies to all of us.
Look it up.

FYI - where I live, that section of the FM band is empty.

---
So what? The non-empty parts of the band where you live were also
empty once. Then some folks who wanted to use part of _our_ spectrum
got a license to do so, and are now legally on the air. Follow their
good example.
---

Hey dipshit, how much of your company's time do you piss away
listening to static?

---
So far, about ten or fifteen minutes reading your crap.
---

And where have I said that anyone owes me anything?

---
Your attitude and your refusal to want to abide by the FCC's rules
indicates that you feel you've got something coming back to you, i.e.
you're holding a debt of some kind over someones head and calling in
the note.
---

Disregard my first post, if that will assuage your guilt over aiding
someone in -holy shit!- violating the letter of the FCC code.

---
I'm not going do to anything to help you violate anything in the
slightest, so you can take your sophomoric posturing and stick it up
your ass.
---

You must be a lawyer, because only a lawyer could be so narrow-minded,
seeing only problems, no solutions.

---
The solution is for you to stop being the problem. Get with the
program, twerp, or get off the boat.
---

IT'S JUST A SHITTLY LITTLE CAR TRANSMITTER!

---
Yes, I'm sure it would be a real POS if you ever got it off the
ground.
---

So I say again, keep your small minded criticisms to yourself, and kiss my ass.

---
So _you_ say again? Geez, you must be _important_ or something...

FYI, moron, I'll do exactly what I please, including criticise you if
that strikes my fancy, and if you don't like it I suggest you go get a
little attitude adjustment.

--
John Fields

 

[John Smith]

"jtspang" <jtspang@gmail.com> wrote in message
news:1a3c8584.0411170804.5a3157c8@posting.google.com...

John Fields <jfields@austininstruments.com> wrote in message
news:<3l4lp09jfg1stc7cnesrcofiopcfasol1o@4ax.com>...

Hey, asshole, if you're so hot for that little piece of technology get
yourself down to your nearest public library and hit the books. Or
get off your lazy, self-indulgent ass and find a website with how to
do it on it.

As you were told before, nobody here owes you a goddam thing, so if
you have a problem with that, piss off.

Get a fucking clue; nobody wants to help your sorry ass because you're
an irresponsible twat who hasn't the slightest concern for the rights
of others.


Dear god (From your posts I assume that's how you want to be
addressed),

I am looking other places, however, I find you get better answers by
asking more than one source. If I could find a website that had the
circuit I'm looking for, I wouldn't have posted in the first place.
But I decided, instead of trying to reinvent the wheel, maybe someone
else has already done what I'm trying to do. I'll just ask. Can't
hurt, right? Surely the good people at sci.electronics.design can
tell me what I need to know. And some of them can. Those of you who
have avoided the thread but emailed me some ideas, I appreciate it. I
posted here because I thought that it was a forum where maybe someone
who knows about this stuff could point me in the right direction. I
can see that I was mistaken about that. Why impart any knowledge when
you can lecture. How does what I want impune your rights? FYI -
where I live, that section of the FM band is empty.

Living in Butte, Montana must have its down side, but, even there, you have
licensed FM radio stations. The FCC lists 97 commercial and educational
stations currently licensed and on the air in Montana. The FCC also lists 53
LPFM stations, either currently on the air or soon to be. Then there are the
neighboring states who, most likely, have FM stations of their own.

Since you are a member of some sort of car club and you want to drive around
while broadcasting, that conceivably makes all 150 legal stations an
eventual target for your interfering trash.

So don't give us any of that "where I live, that section of the FM band is
empty" crap.

John

 

[Joel Kolstad]

"jtspang" <jtspang@gmail.com> wrote in message
news:1a3c8584.0411170804.5a3157c8@posting.google.com...

IT'S JUST A SHITTLY LITTLE CAR TRANSMITTER!

Sure, but we tell you have to build your shitty little car transmitter, then
you come back and ask for the shitty apartment complex transmiffer, then the
neighborhood transmitter, the small city transmitter, etc.

Hopefully you have respect for the idea that it's reasonable to regulate RF
emissions at _some_ level. You might not like the power levels the FCC will
let you transmit without any licensing, but again, hopefully you accept that
there should be some limit to them. And hopefully you'll agree that
regardless of what that level is, _someone_ is always going to be pissed off
about it!

 

[Philip de Cadenet]

JT,

Freddo's site from the Netherlands may have something of interest:

http://www.freddospage.nl/
--
Philip de Cadenet
Transmitters 'R' Us
http://www.transmittersrus.com

 

[jtspang]

John Fields <jfields@austininstruments.com> wrote in message news:<3l4lp09jfg1stc7cnesrcofiopcfasol1o@4ax.com>...

Hey, asshole, if you're so hot for that little piece of technology get
yourself down to your nearest public library and hit the books. Or
get off your lazy, self-indulgent ass and find a website with how to
do it on it.

As you were told before, nobody here owes you a goddam thing, so if
you have a problem with that, piss off.

Get a fucking clue; nobody wants to help your sorry ass because you're
an irresponsible twat who hasn't the slightest concern for the rights
of others.

Dear god (From your posts I assume that's how you want to be
addressed),

I am looking other places, however, I find you get better answers by
asking more than one source. If I could find a website that had the
circuit I'm looking for, I wouldn't have posted in the first place.
But I decided, instead of trying to reinvent the wheel, maybe someone
else has already done what I'm trying to do. I'll just ask. Can't
hurt, right? Surely the good people at sci.electronics.design can
tell me what I need to know. And some of them can. Those of you who
have avoided the thread but emailed me some ideas, I appreciate it. I
posted here because I thought that it was a forum where maybe someone
who knows about this stuff could point me in the right direction. I
can see that I was mistaken about that. Why impart any knowledge when
you can lecture. How does what I want impune your rights? FYI -
where I live, that section of the FM band is empty. Hey dipshit, how
much of your company's time do you piss away listening to static? And
where have I said that anyone owes me anything? Disregard my first
post, if that will assuage your guilt over aiding someone in -holy
shit!- violating the letter of the FCC code. You must be a lawyer,
because only a lawyer could be so narrow-minded, seeing only problems,
no solutions. IT'S JUST A SHITTLY LITTLE CAR TRANSMITTER! So I say
again, keep your small minded criticisms to yourself, and kiss my ass.

 

[jtspang]

Paul Burridge <pb@notthisbit.osiris1.co.uk> wrote in message news:<ls48p0d9abomohtsuvh2jvfqgk776fcrua@4ax.com>...

On 11 Nov 2004 14:28:33 -0800, jtspang@gmail.com (jtspang) wrote:

Basically what I'm after is a slightly juiced up version of many of
the FM transmitters for use in cars with a portable device (in this
case, my ipod). I don't need to be able to adjust the frequency, and
my only problem with the stuff on the market is the signal is too
weak, so any nearby station (both in band and literally) gives off a
lot of interference. I want something powerful enough in a little
used part of the FM spectrum (i.e. ~ 88.9mHz or something) that I'll
never get overpowered. This has the dual benefit of when on road
trips, my buddies in the car behind me can also tune in to my ipod.
What would be the simplest way to build this? I heard that an NE 564
PLL chip might be the way to go, but I'm not all familiar with it.

Thank God for that, then!
What miserable, crummy sh*t do you intend to inflict on the general
population with your new toy? 24hr "Rap Music"??? No thanks!

There seems to be a lot of semantics and prejudgement going on around
here, and I don't mean just this thread. Who cares what I want it
for, or why I'm interested in it, or what I might "inflict" on anyone
(or no one, in this case). This is for me, and my best friend so we
can listen to the same music on road trips in two cars.

So please, anyone with a simple circuit using a PLL (doesn't have to
be tunable) that accepts a stereo input I would love to see it, as I'd
like to start building a testing different configurations. As was
brought to my intention earlier, a 5 watt transmitter is way too big.
I just want a max range of like 300-500 feet.

Anyone else who wants to scold, deride, disillusion, or otherwise
discourage this, kiss my @ss. This group is supposed to be about
helping out one another, not browbeating someone who is more
interested in building the circuit than using it.

Thanks,
JT