| Author |
Message |
    
Allan
Member
Username: Allan
Post Number: 94
Registered: 2-2006
| | Posted on Saturday, April 29, 2006 - 10:21 pm: | 
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Don't know why, but always wondered if anyone ever tried putting "duals" out the back. You know, co-phase 2 amps, each with it's own antenna.  |
Kid_vicious
Senior Member
Username: Kid_vicious
Post Number: 1491
Registered: 9-2004
| | Posted on Saturday, April 29, 2006 - 10:39 pm: |
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this topic has been dicussed on this forum before.
i think something like this IS possible.
some creative searching on the forum should get you to the thread im speaking of.
try searching the words, "cophased amps" in the subject lines, and see if that works.
i know people were talking about this some time ago.
matt |
Moonraker
Intermediate Member
Username: Moonraker
Post Number: 200
Registered: 3-2005
| | Posted on Sunday, April 30, 2006 - 12:51 am: |
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I remember replying to a post about this before. I had never heard of it and said it probably wouldn't work, but after some research it seems I put my foot in my mouth. |
Kid_vicious
Senior Member
Username: Kid_vicious
Post Number: 1495
Registered: 9-2004
| | Posted on Sunday, April 30, 2006 - 2:36 am: |
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moonraker, i think i responded to that thread too, with an answer of "no way".
but i remember finding out that i was wrong.
matt |
Tfastlane
New member
Username: Tfastlane
Post Number: 5
Registered: 4-2006
| | Posted on Sunday, April 30, 2006 - 7:14 am: |
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I belive it was Dosy used to built the Firebird 500 and make a unit to cophase 2 of them. And Varmint was going to come out with one to cophase 2, KWs. I dont know if thay ever did.
73s Tim |
Allan
Member
Username: Allan
Post Number: 95
Registered: 2-2006
| | Posted on Sunday, April 30, 2006 - 9:04 am: |
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If I remember, co-phased harnesses are 75 ohm coax to get the balance, but I assume the load would be the same as if there was just the antennas @ the end of them. Just need 2 of everything, 'cept the radio... |
Hotwire
Senior Member
Username: Hotwire
Post Number: 1256
Registered: 1-2005
| | Posted on Sunday, April 30, 2006 - 11:32 am: |
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Hotwire
Senior Member
Username: Hotwire
Post Number: 1257
Registered: 1-2005
| | Posted on Sunday, April 30, 2006 - 11:38 am: |
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Ya know I would give it a try with a couple of my cheapy amps but I have already pulled out enough of my own hair just installing 1 amp! Can you imagine trying to set the SWR? Think of the power draw ! |
Allan
Member
Username: Allan
Post Number: 96
Registered: 2-2006
| | Posted on Sunday, April 30, 2006 - 1:07 pm: |
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Just think of all the cool gauges you could mount on the dash, 2 volt, 2 amp, 2 SWR and all back lit blue, naturally. With that Honda gererator humming in the back seat to supply the juice! To top it off, one of those huge knife switches to throw.
Bzzzzzzzzzzzzzzz!  |
Hotwire
Senior Member
Username: Hotwire
Post Number: 1263
Registered: 1-2005
| | Posted on Monday, May 01, 2006 - 1:01 pm: |
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Don't forget someone to drive the car while you operate the system! Talk about multitasking. |
Allan
Intermediate Member
Username: Allan
Post Number: 108
Registered: 2-2006
| | Posted on Monday, May 01, 2006 - 9:10 pm: |
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Pilot to bombardier. Over the target... |
Georgeodjungle
Member
Username: Georgeodjungle
Post Number: 81
Registered: 1-2006
| | Posted on Tuesday, May 02, 2006 - 1:02 pm: |
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i've been looking around & found.
the best way is to use a rf transformer.
search for "rf amplifier coupling".
if haven't tried it yet but it looks easy and, like what were doing in them pill boxes any way.
i've got 2 i'll try right now should be done this by weekend... |
Georgeodjungle
Member
Username: Georgeodjungle
Post Number: 82
Registered: 1-2006
| | Posted on Wednesday, May 03, 2006 - 11:00 pm: |
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just tried a palamar 200 & comander 200
with a "low z" transformer
kind of works 320 watt pep.
they get hot realy realy fast.
didn't check swr's.
this could work..... |
Hotwire
Senior Member
Username: Hotwire
Post Number: 1297
Registered: 1-2005
| | Posted on Thursday, May 04, 2006 - 12:14 pm: |
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Did you contact anyone? If so how was the report? |
Georgeodjungle
Member
Username: Georgeodjungle
Post Number: 83
Registered: 1-2006
| | Posted on Thursday, May 04, 2006 - 4:52 pm: |
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no:
to hot to fast.
i think i got figured out.
will play with it tonight. |
Yankee
Senior Member
Username: Yankee
Post Number: 1174
Registered: 7-2003
| | Posted on Thursday, May 04, 2006 - 8:38 pm: |
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Darn Guys it's the antenna not the power going to it. I've found that with the right DX conditions and a good horizontal beam, I've talked world wide with 12 watts sideband.
Yes, I've heard of co-phased amps, but nothing I would mess with trying to get the match so it worked without blowing a few amps before getting it right. At around a hundred or more bucks for a good 200-250 watt amp, those hundred dollar bills don't grow on trees, if they did I would have several of those money trees in the back yard. |
Kid_vicious
Senior Member
Username: Kid_vicious
Post Number: 1514
Registered: 9-2004
| | Posted on Thursday, May 04, 2006 - 11:06 pm: |
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here's a link to when this was discussed before.
http://www.copperelectronics.com/cgi-bin/discus4/show.cgi?tpc=34&post=84921#POST84921
man, i was a bit mouthy that day. please pardon my sarcasm!LOL
matt |
Georgeodjungle
Member
Username: Georgeodjungle
Post Number: 84
Registered: 1-2006
| | Posted on Friday, May 05, 2006 - 1:53 am: |
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see there's that juju thing.
ya that wheel thing will never work.
& amps are kind of tuff.
but realy easy to work on.
i to love talking with the least amount of power.
when you make a conact with legal power that's doing it.
my fellow cbr across town has to run power all the time, but he's just plug & play.
can't out talk my antennas.
rhombics & whips rule!
i also like to learn new stuff to.
any ways....
got them to work!!!
1st:
relay timing is important.
i just coppied the rf output transformer & matching circuit.
still got to work on recv amp..
every thing you need to know is at
oselectronics.com/
downloads/
broadbandtransformers
hay yankee ya x air force?
i was in the 82nd. |
Yankee
Senior Member
Username: Yankee
Post Number: 1176
Registered: 7-2003
| | Posted on Friday, May 05, 2006 - 1:53 pm: |
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Dennis, Yes Air Force in the 50s. Last stationed Suffolk County AFB, West Hampton Long Island. (F-89s, F-86Ds, F-102s, F-104s)
Weapons Specialist 5th Fighter Squadron, 52nd Air Command, Eastern Air Defence Command. |
Georgeodjungle
Member
Username: Georgeodjungle
Post Number: 88
Registered: 1-2006
| | Posted on Friday, May 05, 2006 - 8:45 pm: |
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thank you for your service, sir. |
