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  #1  
Old 02-11-2017, 10:10 PM
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omrsramsay omrsramsay is offline
 
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Default Patch 2 radios

What is the easiest way to patch 2 Becker transceivers together so I can monitor one while transmitting and receiving on the other? I'm thinking in terms of a selector switch to toggle between them. Thanks.
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  #2  
Old 02-12-2017, 05:34 AM
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Try buying this first.

Aeroelectric book

It has a section on audio including exactly what you are asking for.
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  #3  
Old 02-12-2017, 05:44 AM
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The way I have done this is to have a switch that swaps the intercom mic output between radios, then you listen to one or both by adjusting their volumes. The main benefit of an audio panel is that it mutes one input while you transmit on the other so you don't get feedback.
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  #4  
Old 02-12-2017, 07:05 AM
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Mine is similar Jesse. 2 radios and a switch for mic/tx. All audio outputs available at all times depending on volume control setting.

The audio outputs should have at minimum a couple of resistors to keep from damaging the joined output amps. That is best shown with a schematic rather than words. Therefore the the recommendation for the book.
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Bill Pendergrass
ME/AE '82
RV-7A: Flying since April 15, 2012. 850 hrs
YIO-360-M1B, mags, CS, GRT EX and WS H1s & A/P, Navworx
Unpainted, polished....kinda'... Eyeballin' vinyl really hard.
Yeah. The boss got a Silhouette Cameo 4 Xmas 2019.

Last edited by rzbill : 02-12-2017 at 03:02 PM.
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  #5  
Old 02-13-2017, 07:16 PM
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I got the "the book". I'm reading it now. 12th edition is available online for free. http://www.aeroelectric.com/Book/AEC_R12A.pdf
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  #6  
Old 02-19-2017, 06:19 AM
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mscheuer mscheuer is offline
 
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Default PMA4000

Quote:
Originally Posted by omrsramsay View Post
What is the easiest way to patch 2 Becker transceivers together so I can monitor one while transmitting and receiving on the other? I'm thinking in terms of a selector switch to toggle between them. Thanks.
Why not consider getting a little more out of your switches. The PMA4000 was designed specifically for Vans Aircraft. In fact, when it was being developed, the code name for it was Scappose, its the airport where Mr. VanGrunsven flew out of.
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  #7  
Old 02-19-2017, 08:59 AM
rv7charlie rv7charlie is offline
 
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Quote:
Originally Posted by mscheuer View Post
Why not consider getting a little more out of your switches. The PMA4000 was designed specifically for Vans Aircraft. In fact, when it was being developed, the code name for it was Scappose, its the airport where Mr. VanGrunsven flew out of.
Well, not to knock the quality of your product, but are you suggesting that if all we need is to switch between two comms, it's getting more value from our money to pay 2 orders of magnitude more money (that's 100 times more, for the math challenged) for the same function?

Shameless self promotion?
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  #8  
Old 02-19-2017, 10:04 AM
Yobo Yobo is offline
 
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I have 2 separate PTT buttons on my Infinity style stick. The trigger transmits Comm 1 and the thumb (or "alternate pickle button") is Comm 2. I monitor both radios and always use my trigger to talk to ATC and Comm 2 (thumb) to talk to others. You never have to change from Comm1/2 on an intercom -- transmits correct radio based on which button you push. Personally, I love it!
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  #9  
Old 02-20-2017, 01:39 PM
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Default Shameless - Charlie

Quote:
Originally Posted by rv7charlie View Post
Well, not to knock the quality of your product, but are you suggesting that if all we need is to switch between two comms, it's getting more value from our money to pay 2 orders of magnitude more money (that's 100 times more, for the math challenged) for the same function?

Shameless self promotion?
I think not Charlie:

Obviously you do not know that I am a sponsor of Van Airforce.

For those who are not mathematically challenged, that would be 67dB more in audio level, by the way.

I've paid an annual fee to Van's Airforce that allows me to promote our products twice a year.

It is sponsors and the user's donations that helps keep Doug's forum up and running.

I chose this thread because it I believed it was appropriate, it was a discussion of audio switching means.

If you go to either Sun 'N Fun or Oshkosh this year, please stop at our booth. I'd like for us to meet so you might get a clear picture of my integrity.

Sincerely,
Mark
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  #10  
Old 02-20-2017, 03:06 PM
rv7charlie rv7charlie is offline
 
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Well, I can read your signature line...

No challenge to your right to promote your business; just a question about whether it serves the end user best to recommend a $850 product to replace $8.50 worth of switch(es).

This isn't a question about whether your product is worth that money for what it does (I assume it does more than switch transmit function between radios), but about whether it's valid to promote the $850 product as having more value to the customer, if $8.50 & a little work with wire, crimps and solder will get the job done.

Charlie
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