Treo Antenna Hack

Place to discuss electrical design, tweaks, etc
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spymongoose
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Post by spymongoose » Fri Sep 30, 2005 4:57 am

No cable yet, maybe today. I got a few days off, and I hope to build the antennas and get pictures taken for the wiki. Shadow is also gonna send me the dead treo 600 (dreaded network search disease) that I sent him quite a while back, and I'll use those for the pics to represent the treo side of the project.

Johnski1969 (remeber the guy with the baseball bat?) has been complianing about reception near his home, I would like to get an antenna in his hands to see if it solves his problems.
Talkabout T900 --> Handspring Visorphone --> Kyocera 7135 --> Treo 600 --> Apache PPC 6700 -->Nokia 770
http://www.shadowmite.com http://www.ppc6700users.com

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spymongoose
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Post by spymongoose » Wed Oct 05, 2005 5:54 am

Arrgh still no cable... But I have some good news for all those folks who got duped into buying gsm phones. I think I have made a breakthrough with the GSM "SPY" 2.0 antenna project. I will be building the prototype and sending it off to M for testing as soon as im done getting all the pictures taken.

Really its anybody's guess if it will work, but it covers all the GSM frequencies within 100MHz of the first multiple... Meaning it may or may not work at all. I can only imagine this is what the stock antenna does, and this sould be better than the stock one if thats the case. It might not work at all but hell its worth a shot.

Morale of the story: dont buy GSM.
Talkabout T900 --> Handspring Visorphone --> Kyocera 7135 --> Treo 600 --> Apache PPC 6700 -->Nokia 770
http://www.shadowmite.com http://www.ppc6700users.com

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spymongoose
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Post by spymongoose » Sun Oct 09, 2005 6:21 am

Image
It came, and here is one of the pics I will use to build the "SPY 2.0" antenna directions. This shows the male FME plug and the female FME plug side by side. The male fits the PPC 6700 and a vast majority of cell phones, the female fits the Treo line...
Talkabout T900 --> Handspring Visorphone --> Kyocera 7135 --> Treo 600 --> Apache PPC 6700 -->Nokia 770
http://www.shadowmite.com http://www.ppc6700users.com

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spymongoose
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Post by spymongoose » Sun Oct 09, 2005 6:29 am

off topic, but that pic was taken by a 6700... I forgot to focus the lense to the macro mode, but it turned out ok anyhow... you wouldnt believe the pain in the ass it was with that bug the 6700 has with its photo app. bleh.
Talkabout T900 --> Handspring Visorphone --> Kyocera 7135 --> Treo 600 --> Apache PPC 6700 -->Nokia 770
http://www.shadowmite.com http://www.ppc6700users.com

nonobeez
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Post by nonobeez » Sun Oct 09, 2005 4:21 pm

hehehe... my GSM phone works great!!! I can stream 160kbps audio streams great (at night). right now I am getting 3-4 bars on the bart train. drops to 0 in the tunnels, but the LED stays green except on the long tunnels. the key to GSM is to stick to 1900 only

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spymongoose
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Post by spymongoose » Mon Oct 10, 2005 12:46 am

Awesome!!! Well I will make a note of that... I may just send a 1900 prototype to M for testing rather than a 1800.
Talkabout T900 --> Handspring Visorphone --> Kyocera 7135 --> Treo 600 --> Apache PPC 6700 -->Nokia 770
http://www.shadowmite.com http://www.ppc6700users.com

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spymongoose
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Post by spymongoose » Mon Oct 10, 2005 6:06 am

I examined the actual frequencies used and determined that 1920 MHs is the actual center freq for Sprint 1900/GSM 1900. This 20 MHz shift makes a very, very slightly different different lenth antenna... 1.6425" instead of 1.6778" If you can measure and cut that precicely then have at it and trim your antenna to 1.6425". Thats 0.03 of an inch, doesnt really affect the antenna at all really...

The big change comes in the verizon antennas. Please substitute 3.57" instead of 3.51". That whopping 0.06 of an inch is almost measureable!

anyhow these changes mark the center freq the band uses as opposed to the freq of the band. I feel dumb for not doing this in the first place.
Talkabout T900 --> Handspring Visorphone --> Kyocera 7135 --> Treo 600 --> Apache PPC 6700 -->Nokia 770
http://www.shadowmite.com http://www.ppc6700users.com

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spymongoose
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Post by spymongoose » Wed Oct 12, 2005 6:07 am

The current delay comes from 2 things. 1) my own inherent lazyness and my unrealistic work shedual and 2) the actual antenna plug size is giving me fits. I have been fiddiling trying to come up with a solution to probelms 1 and 2.
Talkabout T900 --> Handspring Visorphone --> Kyocera 7135 --> Treo 600 --> Apache PPC 6700 -->Nokia 770
http://www.shadowmite.com http://www.ppc6700users.com

bww143
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Post by bww143 » Wed Oct 12, 2005 10:30 am

I am looking forward to it. Will it be similar to the one in your picture?

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spymongoose
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Post by spymongoose » Thu Oct 13, 2005 12:45 am

Because everyone complains about HOW to mount an antenna it will simply plug into the port and lay against the phone... The Sprint/GSM ones will be about 3" long and have the connector sticking out of the middle of the housing. For the verizon folks I plan on making diagrams for a doublet (meaning small multiple harmonic) as a half scale (1/8h poles) that would be about 3.75" long. These would be small "T" shape antennas and would simply fit on the phone when you need them. The holdup now it getting that fitting to hold the antenna the way I want it to.
Talkabout T900 --> Handspring Visorphone --> Kyocera 7135 --> Treo 600 --> Apache PPC 6700 -->Nokia 770
http://www.shadowmite.com http://www.ppc6700users.com

johnnytk36
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Post by johnnytk36 » Sat Oct 15, 2005 10:43 am

Spy,

I think you said earlier that you used a metal case that was for the treo 650 and cut it up to make your mount. What case was that? I guess it just clips around the sides of the treo? I have never used a metal case for my treo so i dont know if all of the are attached to the treo the same or not. I want to try some different ways of attaching it to the treo and I wa going to try yours out to.

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spymongoose
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Post by spymongoose » Tue Oct 18, 2005 6:37 am

Most of the hard cases simply slip on the treo, leaving the less vulnerable top exposed. To reduce bulk I cut it down a bit, just enough left to make a sturdy mount.
Talkabout T900 --> Handspring Visorphone --> Kyocera 7135 --> Treo 600 --> Apache PPC 6700 -->Nokia 770
http://www.shadowmite.com http://www.ppc6700users.com

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spymongoose
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Post by spymongoose » Wed Oct 19, 2005 6:23 am

I got one antenna up to where I can test it. Im still not sure how to finish it yet, but I got a lot of photos taken throught the process for the wiki directions.

The antenna works pretty well! Like the prototype antenna, It doesnt give me the indications I thought it would. This time around I could not get the RSSI to go above 105 or the EC/IO over 32... I cant seem to abuse the signal more than that...

More testing is necessary.
Talkabout T900 --> Handspring Visorphone --> Kyocera 7135 --> Treo 600 --> Apache PPC 6700 -->Nokia 770
http://www.shadowmite.com http://www.ppc6700users.com

johnnytk36
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ill help

Post by johnnytk36 » Wed Oct 19, 2005 2:26 pm

If you need anybody to test gsm versions, i will be glad to. I am building my own but im not very happy with it right now. I think it is because all the towers around here are 850 and i built a 1900.

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spymongoose
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Post by spymongoose » Thu Oct 20, 2005 6:34 am

I see... It souldnt be too hard to make an 850 antenna... I even have the measurements figgured out for ya... Just make each pole 3.3 inches long. And let us know how it works! As a GSM user that uses 850 you are in a unique position to let us know how well these antennas work...
Talkabout T900 --> Handspring Visorphone --> Kyocera 7135 --> Treo 600 --> Apache PPC 6700 -->Nokia 770
http://www.shadowmite.com http://www.ppc6700users.com

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