May 19, 2012, 12:54 AM
First to go over 106K feet
United States, TX, Waxahachie
Joined Mar 2008
2,503 Posts
Quote:
 Originally Posted by WalneyCol Hi Crist. Can you explain why you used an attenuator. Wouldn't that just reduce the potential range? Col.
I've explained it several times now. The attenuator is there to limit the input signal to the booster. The booster is rated for 20dbi max. If your transmitter is less than that then you don't need the attenuator. The spec says that optimal input power is 9-13dbi.

Using an attenuator does not reduce range. The attenuator is on the input of the booster. So if you input anywhere from 9 to 20 dbi, you'll get full range.

The attenuator has nothing to do with not burning up the host transmitter.
May 19, 2012, 03:33 AM
Seafax
United Kingdom, Barrow-in-Furness
Joined Feb 2011
382 Posts
Quote:
 Originally Posted by Crist Rigotti I've explained it several times now. The attenuator is there to limit the input signal to the booster. The booster is rated for 20dbi max. If your transmitter is less than that then you don't need the attenuator. The spec says that optimal input power is 9-13dbi. Using an attenuator does not reduce range. The attenuator is on the input of the booster. So if you input anywhere from 9 to 20 dbi, you'll get full range. The attenuator has nothing to do with not burning up the host transmitter.
Thanks Crist I think I'm up to speed now. On my first read through I gave up when a certain person's off topic remarks looked like they were about to derail the thread completely but I persevered today and can see that much more valuable information was still to come.

It sounds like a remarkable and very simply mod I can't wait to give it a try so many thanks for your perseverance with it.

Col.
May 19, 2012, 04:41 PM
Registered User
Joined Jan 2012
42 Posts
Quote:
 Originally Posted by Jack2010 What should be the sequence of powering up the set: booster first and then the radio or radio on first and then the booster or it does not really matter as long as the antenna is on the booster and there is RF connection between the booster and the TX? In my setup I will not be able to connect them both in the same time as there will be some distance in between them.
Anyone can help on this one?
 May 24, 2012, 07:38 AM United Kingdom, Birmingham Joined May 2011 522 Posts Hi all! I would like to set up my Flysky th9x radio same Turnigy 9x with this booster. Somebody who done this mode with this or other radio can upload here some picture about inside wireings. I'would like to know how to connect the booster with the same main battery of the RC transmitter, i dont want to make GND loop fault. I have no a 1C 2650mah 3s lipo in my transmitter. Can I use this battery to feed my Argtek or Sunhans booster. (I know Argtek need 6v, which can provide a car lightter 12v-5v adapter e.g or hobbking ubec) Can u send me some picture about connecting the wires to transmitte on off switch inside (in case of turnigy)? thanks for help Latest blog entry: Copterentre UK - RC products at one...
 May 24, 2012, 09:52 AM Registered User United States, CA, Oceanside Joined Aug 2010 1,288 Posts How about post #2. Maybe that will be some help.
 May 30, 2012, 03:02 PM Scratch builder United States, CO, Colorado Springs Joined Jul 2011 274 Posts Are the steps the same for the dx7s(newer model)?
May 30, 2012, 11:06 PM
First to go over 106K feet
United States, TX, Waxahachie
Joined Mar 2008
2,503 Posts
Quote:
 Originally Posted by Jack2010 Anyone can help on this one?
I just powered mine up at the same time.
May 30, 2012, 11:08 PM
First to go over 106K feet
United States, TX, Waxahachie
Joined Mar 2008
2,503 Posts
Quote:
 Originally Posted by Ltomi78 Hi all! I would like to set up my Flysky th9x radio same Turnigy 9x with this booster. Somebody who done this mode with this or other radio can upload here some picture about inside wireings. I'would like to know how to connect the booster with the same main battery of the RC transmitter, i dont want to make GND loop fault. I have no a 1C 2650mah 3s lipo in my transmitter. Can I use this battery to feed my Argtek or Sunhans booster. (I know Argtek need 6v, which can provide a car lightter 12v-5v adapter e.g or hobbking ubec) Can u send me some picture about connecting the wires to transmitte on off switch inside (in case of turnigy)? thanks for help
May 31, 2012, 02:11 AM
Registered User
Joined Jun 2011
46 Posts
Quote:
 Originally Posted by Ltomi78 Hi all! I would like to set up my Flysky th9x radio same Turnigy 9x with this booster. Somebody who done this mode with this or other radio can upload here some picture about inside wireings. I'would like to know how to connect the booster with the same main battery of the RC transmitter, i dont want to make GND loop fault. I have no a 1C 2650mah 3s lipo in my transmitter. Can I use this battery to feed my Argtek or Sunhans booster. (I know Argtek need 6v, which can provide a car lightter 12v-5v adapter e.g or hobbking ubec) Can u send me some picture about connecting the wires to transmitte on off switch inside (in case of turnigy)? thanks for help
Hi, I did this on my 9X and I also posted a detailed DIY on it. You can find it in the radios forum. I used the battery in the transmitter and a UBEC, coupled to a battery gauge. Well...do a little searching in the radio forum and take a look your self.

BTW Crist Rigotti,
You were one of the inspirations. Thanks to you and others who have done this I'm getting TX ranges further than my VTX can handle. Before I was going into fail safe at 50%-ish VTX range. Thanks
May 31, 2012, 12:48 PM
First to go over 106K feet
United States, TX, Waxahachie
Joined Mar 2008
2,503 Posts
Quote:
 Originally Posted by rotaryboots Hi, I did this on my 9X and I also posted a detailed DIY on it. You can find it in the radios forum. I used the battery in the transmitter and a UBEC, coupled to a battery gauge. Well...do a little searching in the radio forum and take a look your self. BTW Crist Rigotti, You were one of the inspirations. Thanks to you and others who have done this I'm getting TX ranges further than my VTX can handle. Before I was going into fail safe at 50%-ish VTX range. Thanks
You are most welcome. Thanks for helping out on the 9X.
Jul 03, 2012, 08:37 PM
Registered User
Joined Jan 2012
7 Posts
Quote:
 Originally Posted by Bixler13 Are the steps the same for the dx7s(newer model)?
I did the mod on the DX7s and it works great. I didn't bother tapping off the internal battery though. I just put a external 450mah 3s battery and a dc/dc converter next to the amplifier instead.
 Jul 30, 2012, 12:27 AM Registered User Joined Feb 2010 49 Posts 2w booster is the 2w booster beter? any danger?
 Aug 21, 2012, 02:17 PM Registered User Calgary Canada Joined Jun 2006 5,175 Posts hi all, great info, I am setting up my first tests for this booster. Radio is a Futaba 10C booster is the usual 1 watt booster. I did some range tests with the transmitter in my basement. Without the booster I get about three houses away outside with the booster I get about one extra house... I was hoping for much more but becuase it is not LOS at all I am sure the difference will be much more in the air. My question is about attenuation... I have 12 feet of cable and couple connectors... likely this may be too much attenuation but I would like some way to measure this attenuation. Is it possible to do this? Do I measure the resistance in the cable and apply some sort of formula? Thanks! Steve
Aug 23, 2012, 12:05 PM
First to go over 106K feet
United States, TX, Waxahachie
Joined Mar 2008
2,503 Posts
Quote:
 Originally Posted by saabguyspg hi all, great info, I am setting up my first tests for this booster. Radio is a Futaba 10C booster is the usual 1 watt booster. I did some range tests with the transmitter in my basement. Without the booster I get about three houses away outside with the booster I get about one extra house... I was hoping for much more but becuase it is not LOS at all I am sure the difference will be much more in the air. My question is about attenuation... I have 12 feet of cable and couple connectors... likely this may be too much attenuation but I would like some way to measure this attenuation. Is it possible to do this? Do I measure the resistance in the cable and apply some sort of formula? Thanks! Steve
Look up the specs for your cable and it will give the attenuation per foot. Then take your TX output power minus the cable length attenuation and the result should not exceed the input power for the amp.
 Aug 24, 2012, 01:04 PM Registered User Calgary Canada Joined Jun 2006 5,175 Posts Yes from reserch there is a formula... I test flew out to 1 km with a 1.3 500mw video TX onboard the other day no problems... so all is good. nice little mod for sure, my friends have been using this system for a year now. Steve