*Ss Brewing Technologies Giveaway - Enter Now!*

Home Brew Forums > Home Brewing Community > General Chit Chat > FM Transmitter Hack?
Reply
 
LinkBack Thread Tools
Old 03-12-2009, 11:04 PM   #1
Brewsmith
Feedback Score: 0 reviews
 
Brewsmith's Avatar
Recipes 
 
Join Date: Aug 2005
Location: Torrance, CA
Posts: 6,259
Liked 31 Times on 29 Posts

Default FM Transmitter Hack?

Calling all electronic geeks. Is there anyway to hack an FM transmitter for an iPod or other mp3 device to boost the signal strength? I've got a Maxell FM Transmitter that I keep in my car for my iPod, but reception is pretty crappy. Here in the LA area there are so many stations that there are not many frequencies to choose from that work.

When I play classical music, which is notorious for being mixed really low, much less than your average rock album, a tiny bit of static will be enough that my car's stereo drops the signal and broadcasts static.

Is there any way to hack that thing to boost the broadcast signal to make it stronger and clearer?

__________________
Fermenting:#160 Apollo/Calypso Pale Ale
Kegged:#153 Old Helicon Barleywine 2013, #157 Irish Red, #158 Mosaic IPA, #159 Bravo/Delta ESB
Up Next:Brown Porter, American Stout, Imperial Stout
My Recipes
Tuba Sonata

Smith & Co. Custom Tap Handles
Brewsmith is offline
 
Reply With Quote Quick reply to this message
Old 03-12-2009, 11:08 PM   #2
ChshreCat
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
ChshreCat's Avatar
Recipes 
 
Join Date: Aug 2008
Location: Camano Island, Washington
Posts: 11,310
Liked 464 Times on 370 Posts
Likes Given: 17

Default

The easiest way to boost the signal on a transmitter is to replace the antenna with something tuned to the wavelength (or a multiple). Here's a calculator to find that for a given frequency:

Frequency Wavelength Calculator

__________________

"Science + beer = good!"
-Adam Savage

ChshreCat is offline
 
Reply With Quote Quick reply to this message
Old 03-12-2009, 11:10 PM   #3
LayMeister
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jun 2008
Location: Kitchener, ON
Posts: 321
Default

You could buy one of these kits. You may need an inverter as well.

Paul

__________________
Future Brews: SMASH Double Bock/Paulaner Salvator Clone
LayMeister is offline
 
Reply With Quote Quick reply to this message
Old 03-12-2009, 11:15 PM   #4
Brewsmith
Feedback Score: 0 reviews
 
Brewsmith's Avatar
Recipes 
 
Join Date: Aug 2005
Location: Torrance, CA
Posts: 6,259
Liked 31 Times on 29 Posts

Default

Quote:
Originally Posted by LayMeister View Post
You could buy one of these kits. You may need an inverter as well.

Paul
I'm thinking something cheap and relatively simple. Not worth it for the $25 spent on the Maxell piece of junk!
__________________
Fermenting:#160 Apollo/Calypso Pale Ale
Kegged:#153 Old Helicon Barleywine 2013, #157 Irish Red, #158 Mosaic IPA, #159 Bravo/Delta ESB
Up Next:Brown Porter, American Stout, Imperial Stout
My Recipes
Tuba Sonata

Smith & Co. Custom Tap Handles
Brewsmith is offline
 
Reply With Quote Quick reply to this message
Old 03-12-2009, 11:24 PM   #5
Brewsmith
Feedback Score: 0 reviews
 
Brewsmith's Avatar
Recipes 
 
Join Date: Aug 2005
Location: Torrance, CA
Posts: 6,259
Liked 31 Times on 29 Posts

Default

Quote:
Originally Posted by ChshreCat View Post
The easiest way to boost the signal on a transmitter is to replace the antenna with something tuned to the wavelength (or a multiple). Here's a calculator to find that for a given frequency:

Frequency Wavelength Calculator
So how would I go about doing this? Off the shelf parts at radio shack?
__________________
Fermenting:#160 Apollo/Calypso Pale Ale
Kegged:#153 Old Helicon Barleywine 2013, #157 Irish Red, #158 Mosaic IPA, #159 Bravo/Delta ESB
Up Next:Brown Porter, American Stout, Imperial Stout
My Recipes
Tuba Sonata

Smith & Co. Custom Tap Handles
Brewsmith is offline
 
Reply With Quote Quick reply to this message
Old 03-13-2009, 12:16 AM   #6
Skins_Brew
Feedback Score: 0 reviews
 
Skins_Brew's Avatar
Recipes 
 
Join Date: Dec 2007
Location: Silver Spring, MD.
Posts: 1,215
Liked 4 Times on 4 Posts
Likes Given: 1

Default

You can get a very cheap stereo for like $50 that has an auxiliary input. If you dig listening to your ipod in the car, I would go for it. I spent like $250 on an ipod compatible unit that allows me to browse artists, playlists, etc. It rules, one of the best $250 I ever spent.

__________________
Braves on the Warpath!
Fight for old D.C.!

I Support My LHBS!! (Maryland HB)
Skins_Brew is offline
 
Reply With Quote Quick reply to this message
Old 03-13-2009, 12:26 AM   #7
Edcculus
Feedback Score: 0 reviews
Recipes 
 
Join Date: Jun 2007
Location: Greenville, SC
Posts: 4,567
Liked 40 Times on 37 Posts

Default

I'd be interested in this too. In the end, I'm going to get a new stereo. I'd like to see if there is a quick fix in the mean time. I have taken to listening to beer podcasts in the car because I can't get great quality in my music. I don't care if Jamil or Graham's voices are slightly fuzzy.

__________________
Edcculus is offline
 
Reply With Quote Quick reply to this message
Old 03-13-2009, 12:32 AM   #8
rex
Feedback Score: 0 reviews
Recipes 
 
Join Date: Mar 2008
Location: Newfoundland
Posts: 87
Liked 1 Times on 1 Posts

Default

There is a certain fm transmitter...the C Crane that has a "hidden" pot (potentiometer) inside that lets you boost the signal.

Digital FM Transmitter

The info for the hack is posted openly on Amazon...

Amazon.com: C. Crane FMT Digital FM Transmitter with AC Adapter: Electronics

1) Open up the box,
by removing 3 screws (one screw is in battery compartment and the other 2 are under those circular rubber feet which are adhesive and once removed can be refitted afterwards)

2) Locate the variable resistor marked VR2 on the circuit board. (For those non-technical this is like a volume control that is operated by inserting a tiny screwdriver and turning fully clockwise). Turn VR2 to the fully clockwise position.

Viola! The power output will increase by about five fold

That's the one that comes to mind!

I have no first hand experience with the unit...but am probably going to pick one up.

__________________
www.getfirefox.com
rex is offline
 
Reply With Quote Quick reply to this message
Old 10-28-2010, 06:36 PM   #9
maltbier
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2009
Posts: 4
Likes Given: 1

Default

I have one of these C Crane Transmitters, and yes you can turn the internal variable resistor to increase power. Note that it is not legal to do so, or C Crane would just ship it that way (they can not due to FCC power regulations). Unless you do something to cause interference (like jamming your neighbor's favorite station), then you are unlikely to cause problems (except maybe while mobile in your car... you can override some stations in the car next to you).

Once you turn the resistor up, you get PLENTY of range and power. In fact you can "jam" local stations from within a few feet (which is not wise to do). Use one of the many websites that ask for your zip code and suggest an UNUSED frequency.

With this adjustment, I can stream audio from my laptop to EVERY radio in the house. It's really nice, since the audio is perfectly in sync (which would not be the case if I tried to rig up actual streaming audio over the LAN)

__________________
maltbier is offline
 
Reply With Quote Quick reply to this message
Old 10-28-2010, 06:39 PM   #10
JetSmooth
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2010
Location: Baltimore, MD
Posts: 1,881
Liked 43 Times on 39 Posts
Likes Given: 10

Default

I HATE those damn things! Hardwire it into your damn car.

I'm tired of listening to Freaking Howard Stern and sh** music while I'm driving and trying to follow a story on NPR. Dammit, people! Tune those f***ing things to a dead channel and get it off the M*****F****** detault station!!!

__________________
http://smokebubbles.wordpress.com - Brewin' and 'Quein' since last Tuesday.

Bottling the Belgian: A Photo Odyssey

Beer is the mind-killer. Beer is the little death that brings total obliteration. I will face my beer. I will permit it to pass over me and through me. And when it has gone past I will turn the inner eye to see it's path. When the beer has gone there will be nothing. Only I will remain.
JetSmooth is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wireless Video/Audio Transmitter AnOldUR General Chit Chat 13 10-09-2010 10:04 PM
Anyone hack their Linksys or other router? 98EXL General Chit Chat 62 11-21-2009 06:18 PM
So you think I could hack this?!? John Beere DIY Projects 11 08-18-2008 06:35 PM
Interesting Forum Hack olllllo General Chit Chat 3 08-01-2007 10:43 AM