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Ryan
Intermediate Member
Username: Ryan
Post Number: 107
Registered: 11-2002
| | Posted on Tuesday, July 27, 2004 - 7:59 pm: | 
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http://www.allelectronics.com/cgi-bin/category.cgi?category=260&item=VOX-2&type=store
has anyone tried this item? im thinkin of purchasing a couple for patching 2 handhelds together. all it would take is a few adapters from radshack from the looks of em
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Dindin
Intermediate Member
Username: Dindin
Post Number: 285
Registered: 2-2004
| | Posted on Tuesday, July 27, 2004 - 9:28 pm: |
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Ryan,used them a few years ago for hands free operation with Maxon handhelds.they did work but depending on where you set the sensitivity control they would either key from background noise or you would have to whistle to get them to key.a real nuscense.but for that price they would be worth experimenting with.these were originally sold with a headset with boom mic for around $100 about 7 years ago. |
That ELCO Guy (Unregistered Guest)
Unregistered guest
| | Posted on Tuesday, July 27, 2004 - 10:07 pm: |
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There is a fly in the oinement. But first for those who do not know what a repeater is. A repeater is a radio that receives an incomming signal and rebroadcasts it. Most of the time the repeater antenna is on the top of a tall tower. The purpose is to increase the transmission distance.
Now here is where the rub comes in, to increase distance the home made repeater must be of a higher elevation so as to increase the line of sight and subsequent retransmission distance. The working frequency of FRS is UHF aka Line of Sight if I remember correctly so height becomes very important. So unless you somehow can figure out a way to increase the height of your home brew repeater you are not going to increase the range very much.
ALSO something to consider, being as your system is not Tone Encoded like the ham repeaters (tone must be present on the incomming signal for the repeater to open up) anyone can jam the system by simply as they say Keying Down.
Also anyone can broadcast crude wording over an open repeater so you are going to have to figure out a way to shut down the system remotely.
OHHH by the way, you can do the same thing on CB. It is quite simple. One person listens on the transmit of the other person and transmits on another frequency. The other person reverses the procedure. Of course it would take 2 radios and 2 antenna systems.
That ELCO Guy
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That ELCO Guy (Unregistered Guest)
Unregistered guest
| | Posted on Wednesday, July 28, 2004 - 1:00 am: |
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I was not intending to reference the encoder on the radios as such. But rather I was re to using a piggyback tone that turns on the receiver in the first place.
Now I think what you are thinking of is the feature on the radio that allows one to set the auto squelch. This auto squelch only stops the radio from hearing a transmission that does not match its squench code requirement. The PL tone system is hmmm more secure.
I one wants pure security you can place a coded access on the receiver. Ham people use a touch pad coded access to screen out people not on the approved list of users. The most commonly used application of this is on their phone patch access. In order to access a repeater the user using a touch pad on the mic to send a signal then send a proper coded touch tone sequence. This coded touch tones sequence opens the repeater function. The touch pad access is the most desirable access control in that the code sequence can be changed as required, remotely in most cases via telephone lines. If one is having a trouble maker problem then just change the touch tone access sequence, the trouble maker is locked out and repeater owner sends the new access sequence to the authorized users. This of course will probably require an external control board.
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Ryan
Intermediate Member
Username: Ryan
Post Number: 108
Registered: 11-2002
| | Posted on Wednesday, July 28, 2004 - 1:02 am: |
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on the note of crude language, its not my job to limit someones free speech, but im thinkin this device could work well with something like the cobra 45wx handheld CB. it could be of real use for apt dwellers. and really folks, does the fcc have the time, manpower, or funding to go after dirtweasel 1 watt FRS users relaying a bunch of CB heehaws? |
Ryan
Intermediate Member
Username: Ryan
Post Number: 109
Registered: 11-2002
| | Posted on Wednesday, July 28, 2004 - 11:51 am: |
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dindin, how is the delay at the end of the transmissions on these? it wont leave me transmitting for more than 2 seconds after the speech is gone will it? |
Dindin
Intermediate Member
Username: Dindin
Post Number: 286
Registered: 2-2004
| | Posted on Wednesday, July 28, 2004 - 6:13 pm: |
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Ryan,the delay was dependent on where you setthe sensitivity control.the longest delay i recall was whe set to the most sensitive extreme.and then the delay was only about 1 second. |
Ryan
Intermediate Member
Username: Ryan
Post Number: 110
Registered: 11-2002
| | Posted on Wednesday, July 28, 2004 - 10:52 pm: |
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thanks din din, there is really no one using GMRS in the local area even when FRS first came out. i remember i used to have a scanner with their freqs programmed in
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