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-   -   FM transmitter for around the house? (https://www.radiobanter.com/shortwave/45231-fm-transmitter-around-house.html)

Mike Terry October 12th 04 08:52 PM

Anybody got the Veronica kit, I sent them an email this weekend and they
have not replied!

Mike

"Bob Sillett" wrote in message
...
If you like to build kits, check out Ramsey Electronics.
http://www.ramseyelectronics.com/

Go to the Hobby Kits section, then AM/FM broadcasters

I have the FM-10 and FM-100 kits, and a friend of mine has the FM-25. All
three kits will easily broadcast around your house. If you build a dipole
antenna, you can also get a little extra range. Note that this might put
you over the FCC limit; however, having a range of 1/2 a block isn't going
to be a big deal.

Here are a couple of notes about each model:

FM-10 -- this is tuned via a coil and it tends to drift as the unit heats
up. This means that you'll never get this perfectly on-frequency. As

long
as your target radio is analog, this works great. You just need to be

sure
that your analog FM radio has AFC or else you'll need to slightly retune
every 40 to 60 minutes.

FM-25 -- this is the same as the FM-10 but with PLL tuning. You set the
frequency by turning switches on and off. So it's suitable for digital
receivers. The range and sound quality is equivalent to the FM-10.

FM-100 -- this is the high-end version of the hobby kits. It has an LCD

for
tuning, two line-in inputs, and a microphone input. I built this kit, and
it has over 600 solder connections. It took me about a week to get this
built, whereas the FM-10 and FM-25 are much simpler to build.

Ramsey also has a good service policy. When I built my FM-100, I turned

it
on and nothing worked. I couldn't find the problem, so I sent it back to
Ramsey. I had a cold solder connection, which they found and fixed. I

had
to pay for the service, but they were fixing my mistake!

I really like my FM-100, but I would recommend the FM-10 or FM-25. It all
depends if you need PLL tuning or not, because the FM-25 is $90 more.

Note
also that these transmitters are pretty much at the legal FCC limit (I

have
read that they're slightly above the limit), so any modifications like
tweaking the antenna will put you over the limit.

Bob


"Conan Ford" wrote in message
.159...
I'd like to be able to listen to shortwave stations around the house, or
even MW stations on my Superadio II without lugging the radio around the
house (in the case of SW, this is impossible because I can't take my
antenna wire around). What's the best solution for this? I was

thinking
of a small FM transmitter like this:
http://www.radioshack.ca/estore/Prod...roduct=1218989 , but I'm
betting the range on these is very small.






Al Patrick October 13th 04 12:23 AM

I think may be better off with the NRG Kits radio. They respond to
their emails. They back up their work. They produce great products.
Don't know who Veronica may have working as techs or engineers, but
check the net and you'll see that a couple of years or so ago the money
man and the engineer split up and the engineer became NRG Kits. I know
nothing about the other fellow, only what was on the web at the time.
Massive dispute and law suit.

Mike Terry wrote:

Anybody got the Veronica kit, I sent them an email this weekend and they
have not replied!

Mike


Michael Lawson October 13th 04 01:48 AM

I have the FM-10 kit, and I enjoy it as an example of
an inexpensive transmitter kit. That said, it's not much
more than that, so if you get serious, try the 25 or 100.

--Mike L.


"Bob Sillett" wrote in message
...
If you like to build kits, check out Ramsey Electronics.
http://www.ramseyelectronics.com/

Go to the Hobby Kits section, then AM/FM broadcasters

I have the FM-10 and FM-100 kits, and a friend of mine has the

FM-25. All
three kits will easily broadcast around your house. If you build a

dipole
antenna, you can also get a little extra range. Note that this

might put
you over the FCC limit; however, having a range of 1/2 a block isn't

going
to be a big deal.

Here are a couple of notes about each model:

FM-10 -- this is tuned via a coil and it tends to drift as the unit

heats
up. This means that you'll never get this perfectly on-frequency.

As long
as your target radio is analog, this works great. You just need to

be sure
that your analog FM radio has AFC or else you'll need to slightly

retune
every 40 to 60 minutes.

FM-25 -- this is the same as the FM-10 but with PLL tuning. You set

the
frequency by turning switches on and off. So it's suitable for

digital
receivers. The range and sound quality is equivalent to the FM-10.

FM-100 -- this is the high-end version of the hobby kits. It has an

LCD for
tuning, two line-in inputs, and a microphone input. I built this

kit, and
it has over 600 solder connections. It took me about a week to get

this
built, whereas the FM-10 and FM-25 are much simpler to build.

Ramsey also has a good service policy. When I built my FM-100, I

turned it
on and nothing worked. I couldn't find the problem, so I sent it

back to
Ramsey. I had a cold solder connection, which they found and fixed.

I had
to pay for the service, but they were fixing my mistake!

I really like my FM-100, but I would recommend the FM-10 or FM-25.

It all
depends if you need PLL tuning or not, because the FM-25 is $90

more. Note
also that these transmitters are pretty much at the legal FCC limit

(I have
read that they're slightly above the limit), so any modifications

like
tweaking the antenna will put you over the limit.

Bob


"Conan Ford" wrote in message
.159...
I'd like to be able to listen to shortwave stations around the

house, or
even MW stations on my Superadio II without lugging the radio

around the
house (in the case of SW, this is impossible because I can't take

my
antenna wire around). What's the best solution for this? I was

thinking
of a small FM transmitter like this:
http://www.radioshack.ca/estore/Prod...roduct=1218989 , but

I'm
betting the range on these is very small.







starman October 13th 04 07:46 AM

Bob Sillett wrote:

If you like to build kits, check out Ramsey Electronics.
http://www.ramseyelectronics.com/

Go to the Hobby Kits section, then AM/FM broadcasters

I have the FM-10 and FM-100 kits, and a friend of mine has the FM-25. All
three kits will easily broadcast around your house. If you build a dipole
antenna, you can also get a little extra range. Note that this might put
you over the FCC limit; however, having a range of 1/2 a block isn't going
to be a big deal.


The 'C. Crane' FM transmitter (not a kit) is on sale for $69. Used to
sell for $99. It tunes the entire FM band. Comes with a whip antenna.


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Pon October 13th 04 08:34 AM

On Wed, 13 Oct 2004 02:46:03 -0400, starman wrote:

Bob Sillett wrote:

If you like to build kits, check out Ramsey Electronics.
http://www.ramseyelectronics.com/

Go to the Hobby Kits section, then AM/FM broadcasters

I have the FM-10 and FM-100 kits, and a friend of mine has the FM-25. All
three kits will easily broadcast around your house. If you build a dipole
antenna, you can also get a little extra range. Note that this might put
you over the FCC limit; however, having a range of 1/2 a block isn't going
to be a big deal.


The 'C. Crane' FM transmitter (not a kit) is on sale for $69. Used to
sell for $99. It tunes the entire FM band. Comes with a whip antenna.


Anyone know the range of this device ?

Ken Finney October 13th 04 04:28 PM


"Pon" wrote in message
...
On Wed, 13 Oct 2004 02:46:03 -0400, starman wrote:

Bob Sillett wrote:

If you like to build kits, check out Ramsey Electronics.
http://www.ramseyelectronics.com/

Go to the Hobby Kits section, then AM/FM broadcasters

I have the FM-10 and FM-100 kits, and a friend of mine has the FM-25.

All
three kits will easily broadcast around your house. If you build a

dipole
antenna, you can also get a little extra range. Note that this might

put
you over the FCC limit; however, having a range of 1/2 a block isn't

going
to be a big deal.


The 'C. Crane' FM transmitter (not a kit) is on sale for $69. Used to
sell for $99. It tunes the entire FM band. Comes with a whip antenna.


Anyone know the range of this device ?


About 10 feet, unless you remove the sticker and turn the pot up.
Then people have reported up to a couple of hundred feet.

My recommendation: The Max Pro I from www.pcs-electronics.com
About $160.






RHF October 13th 04 09:36 PM

= = = Pon wrote in message
= = = . ..
On Wed, 13 Oct 2004 02:46:03 -0400, starman wrote:

Bob Sillett wrote:

If you like to build kits, check out Ramsey Electronics.
http://www.ramseyelectronics.com/

Go to the Hobby Kits section, then AM/FM broadcasters

I have the FM-10 and FM-100 kits, and a friend of mine has the FM-25. All
three kits will easily broadcast around your house. If you build a dipole
antenna, you can also get a little extra range. Note that this might put
you over the FCC limit; however, having a range of 1/2 a block isn't going
to be a big deal.


The 'C. Crane' FM transmitter (not a kit) is on sale for $69. Used to
sell for $99. It tunes the entire FM band. Comes with a whip antenna.


Anyone know the range of this device ?



PON,

C. Crane Co. claims "Approximate line-of-sight range of 70 ft."

However, if you want to increase the Range, it is simple to
construct an 'extension' Antenna for the FM Band to attach
to the built-in Whip Antenna or Wire Antenna.

Cut a piece of TV 300 Ohm Twin Lead to Five Foot Ten Inches (5' 10")
- At the Top-End 'strip' a 1/2" Insulation from the Two Wires
and Twist them together.
- At the Bottom-End 'strip' a 1/2" Insulation from One of the
Two Wires.
- Trim the Transmitter's Antenna Wire to Two Inches (2") and
'strip' a 1/2" Insulation from the wire. Take this wire and
the Bottom-End Wire and 'twist' them together. Extend the
'extension' Antenna Wire Straight UP Vertically.
- OR - Collapse the Transmitter's Whip Antenna. Take the
Bottom-End Wire and 'attach' an Alligator Clip. Attach the
Alligator Clip to the Whip Antenna. Extend the 'extension'
Antenna Wire Straight UP Vertically.

TBL: This 'extension' Antenna for the FM Band should improve
the Signal Quality of the current reception and "Extend" the
Range of Reception to 150-200 Feet.

~ RHF
..


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