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Author Topic: Another Possible Pointess Question.  (Read 2181 times)
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n3lrx
Yellrx Radio
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« on: September 15, 2014, 03:15:18 AM »

 Just another project to keep me busy until I can actually get on the air.

 I have a 600 ohm 1:1 balun for my balanced gear to my unbalanced transmitter. If I wanted to make it for mic level output can I put a variable resistor one fixed end to ground and one fixed end to the signal and the wiper to the output or input signal. Will this be as simple as it seems, or will it not work?

 I've been using the balun on my audio chain which is balanced line level output, and my transmitter that is unbalanced line level input. I figure this way with a little tweaking I can use it for both line level and mic level

 I do want something I can tap my stack into a mic level input.

Here's what I"ve got so far without the box. I've got picture of it in the box and wired but can't get them off my camera. Cry

Thanks!


* audiomatch.jpg (29.57 KB, 640x480 - viewed 340 times.)
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Randy, N3LRX (Yellrx)
n3lrx
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« Reply #1 on: September 15, 2014, 06:14:30 AM »

 Actually, you know what.. I don't even remember why I asked this question. My memory is shot from being a doctors guinea pig for so many years. Maybe tomorrow I'll remember, well actually is tomorrow. Maybe this evening I'll remember. There might be something important I was thinking of.

Oh well. Maybe a few answers will help someone else.
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Randy, N3LRX (Yellrx)
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« Reply #2 on: September 16, 2014, 05:19:25 PM »

I'd build something along the lines of a T attenuator,  and make the last R adjustable.

That would give a semi constant 600 ohms to the gear and allow you to set the audio level wanted.

--Shane
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flintstone mop
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« Reply #3 on: September 17, 2014, 10:12:42 AM »

Typically, in professional gear, there may be a selection for attenuating the mic level, using fixed resistors or variable, and then a matching transformer to the electronics; and on to the first active stage of amplification.
Shane mentioned a way that will probably work very well.
 
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Fred KC4MOP
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