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THANKY YOU! re:Formation flight comm atte

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Fiveonepw(at)aol.com
Guest

Posted: Wed Jan 04, 2006 7:58 pm Post subject: THANKY YOU! re:Formation flight comm atte



In a message dated 01/04/2006 4:24:17 PM Central Standard Time,

nuckollsr(at)cox.net writes:

http://www.aeroelectric.com/articles/Attenuator

 	  Quote: 	
		  >>

	


Another example of why I'm a confirmed Nuckollhead- dangle a real-world

problem in front of someone who doesn't have their nose in the flight levels or up

the exit end of their alimentary canal and voila': solution! Reminds me of

when Indiana Jones (first movie- the others REALLY stank!) is confronted in some

marketplace (Algiers?) by the black-robed ninja-type dude flingin' the blade

all over the place and Indy just pulls out his revolver and solves the

problem. Quick, simple, efficient.

Just to further my education- why the 50 ohms to gnd when switched on, and

what is rationale for the fancier switch than shown in the foto? Also- any

reason not to do a TPDT switch for an annunciator light?

Thanks AGAIN Bob for another great assist and for just doing what ya do!

Also appreciate the comments and suggestions from other A-listers in the

prosecution of this problem...

 	  Quote: 	
		  From The PossumWorks in TN

Mark Phillips - RV-6A N51PW (no wallpaper but a journeyman certificate and 25 	


years herding robots, plcs, big automation systems etc.....)

do not archive

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brian-yak(at)lloyd.com
Guest

Posted: Wed Jan 04, 2006 8:21 pm Post subject: THANKY YOU! re:Formation flight comm atte



Fiveonepw(at)aol.com wrote:

 	  Quote: 	
		   Just to further my education- why the 50 ohms to gnd when switched on,

	


Because that is what the transmitter wants to see. If the resistance

(impedance actually) is different from that by a factor of three or more

the transmitter could either be damaged or, if it has a protection

circuit, it could refuse to transmit.

 	  Quote: 	
		   and what is rationale for the fancier switch than shown in the foto?

	


It would do a better job of presenting the aforementioned 50 ohm

impedance. Regardless, at the relatively low frequencies at which VHF

comms operate, Bob's wiring looks darned good and is unlikely to cause a

problem with your radio.

 	  Quote: 	
		   Also- any reason not to do a TPDT switch for an annunciator light?

	


None at all.

--

Brian Lloyd 2243 Cattle Dr.

brian-yak at lloyd dot com Folsom, CA 95630

+1.916.367.2131 (voice) +1.270.912.0788 (fax)

I fly because it releases my mind from the tyranny of petty things . . .

- Antoine de Saint-Exupery

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