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CCRANE FM Transmitter MOD and Tests.
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Wireman
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Joined: 09 Sep 2002
Posts: 2058

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Posted: Tue Mar 04, 2003 11:33 am Post subject: CCRANE FM Transmitter MOD and Tests.

HI Folks,

This is only for all you electronic techs out there that like to play.
NOTE:Do this Mod at your own Risk. Neither XMFAN.COM or Wireman are holding a gun to your head to perform this mod. This mod and data is for Educational Purposes only.

This simple mod will let you increase the range of the CCrane FM Stereo transmitter.

Easiest Way:
Simply peel off the sticker on the bottom of the transmitter. The larger hole at the top left will give you the same access to the VR2 without having to take apart the transmitter.

You can remove the label on the back with the radio specs and find the little hole and adjust VR2 though the hole in the case.

Locate the VR2 pot just to the top left of the Antenna connection. (See attached Picture below)

Using a small screwdriver rotate this pot control to the right 1/4 turn (Clockwise). Be carful not to break it by turning too far.
(See attached picture for location details)
The picture shows what VR2 looks like before the MOD has been done.

After I did the MOD. the range went from 20 feet to 100 feet.

That's all that's to it.

Have Fun

http://store.xmfanstore.com/ccrane-wireless-fm-transmitter.html

ccranepowermod.jpg

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PC Board Showing VR2 Before Mod

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Last edited by Wireman on Thu Apr 17, 2003 6:16 pm; edited 4 times in total

Wireman
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Joined: 09 Sep 2002
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Posted: Tue Mar 04, 2003 11:39 am Post subject:

CCRANE FM STEREO TRANSMITTER
Audio Spectrum test Results.

The following two attached pictures show what the XM audio spectrum looks like at the input and output of the CCRANE FM Stereo transmitter.

fmmod1cc.jpg

Description:

OUTPUT AUDIO AFTER BEING TRANSMITTED THOUGH THE CCRANE FM STEREO TRANSMITTER

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50.56 KB

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nofmmodccin.jpg

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XM Input Audio From Delphi SkyFi

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GizmoToy
No longer the only moderate here.
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Joined: 16 Dec 2002
Posts: 442
Location: Cincinnati
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Posted: Tue Mar 04, 2003 12:42 pm Post subject:

The numbers are are a little hard to read, but it looks like the output level was boosted from -96dB to -72dB. A decent increase. Or maybe I'm just not seeing properly, which is likely the case... _________________ 1998 Civic Coupe - Delphi SkyFi, car kit, FM mod. http://www.xmfan.com/viewtopic.php?t=1596

Wireman
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Joined: 09 Sep 2002
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Posted: Tue Mar 04, 2003 12:54 pm Post subject:

GizmoToy wrote:

The numbers are are a little hard to read, but it looks like the output level was boosted from -96dB to -72dB. A decent increase. Or maybe I'm just not seeing properly, which is likely the case...

If you look at the data up to 15KHZ. Both pretty well match up.
But for some reason the CCRANE unit had removed some signal around 1KHZ.
Above 15 KHZ you can see that CCRANE unit seems to have brought up the noise floor
from -96DB to -72DB (24DB)
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GizmoToy
No longer the only moderate here.
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Joined: 16 Dec 2002
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Location: Cincinnati
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Posted: Tue Mar 04, 2003 1:09 pm Post subject:

True, I see it now. I basically was just looking at the cutoff point. The rest of the spectrum is about equal, like you said. Seems to be pretty good, otherwise. _________________ 1998 Civic Coupe - Delphi SkyFi, car kit, FM mod. http://www.xmfan.com/viewtopic.php?t=1596

meldar_b
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Joined: 21 Nov 2002
Posts: 1769
Location: Martin, KY
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Posted: Wed Mar 05, 2003 9:03 am Post subject:

Wireman wrote:

CCRANE FM STEREO TRANSMITTER
Audio Spectrum test Results.

The following two attached pictures show what the XM audio spectrum looks like at the input and output of the CCRANE FM Stereo transmitter.

Wireman... how about doing this on the Ramsey FM25 B Transmitter

What type of program are you using to doing the spectrum analyzing.

Thanks
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Wireman
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Joined: 09 Sep 2002
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Posted: Wed Mar 05, 2003 9:13 am Post subject:

meldar_b wrote:

Wireman wrote:

CCRANE FM STEREO TRANSMITTER
Audio Spectrum test Results.

The following two attached pictures show what the XM audio spectrum looks like at the input and output of the CCRANE FM Stereo transmitter.

Wireman... how about doing this on the Ramsey FM25 B Transmitter

What type of program are you using to doing the spectrum analyzing.

Thanks

If I had one I would.
The program I used is "Cool Edit Pro"
http://www.syntrillium.com/cep/
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Tnman
Click It Or Ticket!
XM 24/7

Joined: 15 Feb 2003
Posts: 553
Location: Dallas / Ft. Worth, Texas
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Posted: Wed Mar 05, 2003 4:55 pm Post subject:

I did the modification to the C. Crane transmitter today... MAN does it work!!! I was tempted to return it or look into some other way to pull it off but the "turning" up works like a charm. I dont even have to extend the antenna now! I used to have to pull it all the way out and still point it at may cars antenna. I dont use it for anythng but in the car so I dont know about the range increase but no more static for me!!!!

spark1e
Frequent Listener

Joined: 12 Mar 2003
Posts: 36
Location: SE PA
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Posted: Sat Mar 15, 2003 9:12 am Post subject:

Where can one get a C.Crane transmitter?

Wireman
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Joined: 09 Sep 2002
Posts: 2058

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Posted: Sat Mar 15, 2003 10:29 am Post subject:

spark1e wrote:

Where can one get a C.Crane transmitter? Question

http://www.ccrane.com/fm_transmitter.asp
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XMF1
Average Listener

Joined: 10 Feb 2003
Posts: 27

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Posted: Mon Mar 17, 2003 7:34 pm Post subject:

I had one of these and got at least 60+ feat w/o turning it up. I ended up selling it. Wish I'd have known about the mods before I sold it. Is 100' the max? Have you done any further distance testing? Thanks

Wireman
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Joined: 09 Sep 2002
Posts: 2058

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Posted: Mon Mar 17, 2003 7:52 pm Post subject:

XMF1 wrote:

I had one of these and got at least 60+ feat w/o turning it up. I ended up selling it. Wish I'd have known about the mods before I sold it. Is 100' the max? Have you done any further distance testing?

Thanks

Other people have told me after they did the mod have gotton it to go up to 200 feet. But mine only goes to 100 feet before the signal starts to fade.
I'm not much of FM MOD fan. My kid gave me this and it was just sitting collecting dust. I then did the mod and found it went to 100 feet and now it's just sitting and collecting dust again. Rolling Eyes

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yos@l3i.com
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Posted: Sat Apr 12, 2003 11:43 am Post subject: CCrane vs. Irock!

Anyone have any insight on which device will work better with my Nomad MP3 player, the iRock or the CCrane... Thanks! yos@L3i.com

jg9105
Extreme Fan

Joined: 06 Mar 2003
Posts: 202

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Posted: Sun Apr 13, 2003 3:13 pm Post subject:

The modification to the CCrane Transmitter Works Wireman. That is so Cool. I Received mine through the mail on Friday. I love that little Gizmo.

jg9105
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Joined: 06 Mar 2003
Posts: 202

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Posted: Sun Apr 13, 2003 3:22 pm Post subject:

Wireman. If you ever check out this topic again. Just wanted to let you know. By Turning up the CCrane Transmitter The Antenna works better if it isss up when you are farther off. Transmitting on a frequncy to a radio very close by I have found it better to turn the volume down almost to where the little red light doesn't bounce on and off. Turn the Volume on the transmitter down and the Volume of the audio source Up. It works great. I don't even need the antenna up when the radio i want to listen to is in the same room with me

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