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- From baxteam@wkuvx1.bitnet Sun Aug 8 17:21:45 EDT 1993
-
- Souce: Monitoring Times Sept. 1990
- By: Bob Kay
- Reprinted By: John (Topol) Johnson, KWV8BP
- of The Hotline BBS 304-736-9169
-
-
- If you own a Pro-2004 Scanner radio, you're probably an experienced radio
- surgeon. As you poked around the innards of the radio, you were gaining
- valuable experience. Sure, snipping a diode was easy, but it wasn't the only
- modification that required your attention. To add an additional 100 channels,
- you needed a steady hand, a keen eye and a thorough knowledge of soldering
- techniques. Now that you have successfully completed your internship, why not
- use your newly developed talents to extend the operating range of your
- cordless phone? The entire operation will take less than an hour, and it can
- be accomplished on your kitchen table.
-
- We begin by taking apart the cordless handset. The screws that hold the two
- halves together are usually hidden beneath the front panel. On most handsets,
- a retaining screw is locatted under the plastic holder that displays your
- telephone number. After the two sections have been separated, remove the
- factory antenna and replace it with a 72" telescoping whip antenna, Radio
- Shack part #270-1408. Reconnect the antenna wire, assemble the handset, and
- check you work by making a call to a friend.
-
- The Base unit modification requires a little more expertise, but it is
- certainly within the skill level of most scanner buffs. After taking the base
- apart, remove the small antenna, and install a BNC chassis mount connector
- into the existing antenna hole. If the connector won't fit into this location,
- the hole can be enlarged, or you can drill a hole and install the connector at
- a more suitable location. Don't forget to solder the antenna wire to the
- center lug of the connector. Should the wire be too sho rt, splice into and
- extend the length as needed. The trick here is to keep the wire as short as
- possible. When the "mods" are complete, reassemble the base and grab your
- ladder.
-
- For my cordless base antenna, I chose "Cushcrafts" 10 meter, vertical ground
- plane. The height of the antenna's vertical element can be changed by
- adjusting a few screw clamps. I set the height at 10 feet and used 25 feet of
- RG-59 Coax. The Coax was temporarily routed through a window and connected to
- the cordless base by using a solderless male BNC, Radio Shack #278-104.
-
- You can eliminate the cost and inconvenience of erecting a seperate antenna
- by simply hanging ten feet of wire along an outside wall of your home. Solder
- the RG-59 directly to the wire and weatherproof the connection.
-
- The performance of my modified Cordless phone was oustanding. The improved
- antenna system increased the operating distance to approximately 3000 feet.
- It was now possible to answer my cordless phone from across the street!
- However there were some disadvantages. The increased transmitting range was
- also accompanied by an increase in the reception range. On many occasions, I
- could hear voices of other cordless phone users. And during several phone
- calls, I could actually talk to a third party! Readers that live in Rural
- areas may not have this problem. But if you live in the city or nearby
- suburbs, don't be surprised if you suddenly find yourself talking to a
- complete stranger.
-
- Scanner Buffs that live nearby will also enjoy the increased range and clarity
- of your cordless signal. It's similar to a "catch 22" situation. If you
- increase the operating range, you also increase the possibility of being
- monitored..
-
-
- This file was brought to you by, John Johnson, KWV8BP of The Hotline BBS,
- give us a call, we have many files on Scanner & Radio related subjects..
-
- THE HOTLINE BBS
- 304-736-9169
- 2 phone lines, HST-14.4 Modems
-
-
- Notes from John:
-
- I also did these Mod's way back when I first got a cordless phone many years
- back I accomplished a few phone calls from my cordless at ranges of near a
- mile at times.. I wish to also note that this type of modifications can also
- be done on Maxon type Communicators, this will dramatically extend your ranges
- of Transmission and Reception, however it is against the FCC rules to extend
- these types of transmissions.. Have fun and enjoy, any questions can be left
- to me most anywhere..
-
-
-