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What is causing this audio highs attenuation/ distortion problem?




 
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Author Topic: What is causing this audio highs attenuation/ distortion problem?  (Read 118912 times)
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K1JJ
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"Let's go kayaking, Tommy!" - Yaz


« Reply #175 on: January 08, 2020, 11:25:41 PM »

RF FINALS:


Are these coming out right-side up when clicked?  They do for me, but how about others?


And, 2 1/2 year old Yaz 4, English Springer Spaniel.


* DSCF0006.JPG (323.01 KB, 1280x960 - viewed 515 times.)

* DSCF0013.JPG (327.88 KB, 1280x960 - viewed 498 times.)

* DSCF0019.JPG (343.67 KB, 1280x960 - viewed 551 times.)
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Use an "AM Courtesy Filter" to limit transmit audio bandwidth  +-4.5 KHz, +-6.0 KHz or +-8.0 KHz when needed.  Easily done in DSP.

Wise Words : "I'm as old as I've ever been... and I'm as young as I'll ever be."

There's nothing like an old dog.
WA2TTP Steve
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« Reply #176 on: January 09, 2020, 01:27:24 AM »

They are right side up on my iPad.
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Patrick J. / KD5OEI
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WWW
« Reply #177 on: January 09, 2020, 02:19:26 AM »

good on windows/firefox!
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Radio Candelstein - Flagship Station of the NRK Radio Network.
K1JJ
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"Let's go kayaking, Tommy!" - Yaz


« Reply #178 on: January 09, 2020, 02:19:58 AM »

Thanks, Steve and Pat...

I still can't get over the difference such a simple mod can make.  I still need to get the file out and clean it up - or maybe the new bezel and glass will cover up my cutting job... :-)


Old modulator vs: new version:


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* DSCF0015.JPG (348 KB, 1280x960 - viewed 514 times.)

* DSCF0012.JPG (326.53 KB, 1280x960 - viewed 480 times.)
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Use an "AM Courtesy Filter" to limit transmit audio bandwidth  +-4.5 KHz, +-6.0 KHz or +-8.0 KHz when needed.  Easily done in DSP.

Wise Words : "I'm as old as I've ever been... and I'm as young as I'll ever be."

There's nothing like an old dog.
KK4YY
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Your best isn't as good as you can be.


« Reply #179 on: January 09, 2020, 01:29:12 PM »

Some Car Door Edge Trim Molding would clean up the look.
https://www.ebay.com/itm/Car-Door-Edge-Guard-Trim-Molding-Rubber-Seal-Strip-Scratch-Protector-16FT-5M/123855665411?hash=item1cd65f7903:g:x3MAAOSwvW9dnDoF
Maybe sandwich in a thin sheet of lexan.
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All your worries won't add a day to your life, or make the ones you have any happier.
N4LTA
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« Reply #180 on: January 09, 2020, 05:37:43 PM »


Looks Great! Sounds Great!

Pat
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K1JJ
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"Let's go kayaking, Tommy!" - Yaz


« Reply #181 on: January 14, 2020, 08:07:31 PM »

To keep continuity of this thread, here are the finished products after adding in glass windows to the 4-1000A final and modulators.


T


* 4-1000A Final New Window.jpg (327.2 KB, 1280x960 - viewed 492 times.)

* 4-1000A Modulator New Window.jpg (326.81 KB, 1280x960 - viewed 530 times.)
Logged

Use an "AM Courtesy Filter" to limit transmit audio bandwidth  +-4.5 KHz, +-6.0 KHz or +-8.0 KHz when needed.  Easily done in DSP.

Wise Words : "I'm as old as I've ever been... and I'm as young as I'll ever be."

There's nothing like an old dog.
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