| Author |
Message |
    
3wheeler
New member
Username: 3wheeler
Post Number: 7
Registered: 11-2014
| | Posted on Tuesday, December 23, 2014 - 12:43 pm: | 
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Not sure u got my post,so i'll try again.I need help with my Mark lll I want to change the ping to a scream please can this be done? thank you 3wheeler |
Tech833
Moderator
Username: Tech833
Post Number: 2311
Registered: 8-2002
| | Posted on Wednesday, December 24, 2014 - 1:19 pm: |
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The famous Browning "ping" is actually caused by brief feedback from the receiver speaker into the transmitter's microphone as the transmitter is keyed. The "ping" can be changed by either moving the mic closer to the receiver speaker, or to a "scream" by using a larger capacitor in the relay keying delay circuit.
I do not recommend it.
Your radio 'Mythbuster' since 1998
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3wheeler
New member
Username: 3wheeler
Post Number: 8
Registered: 11-2014
| | Posted on Sunday, December 28, 2014 - 8:58 am: |
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Hello Tech833,changed cap to bigger one but ping stayed the same.. |
Tech833
Moderator
Username: Tech833
Post Number: 2316
Registered: 8-2002
| | Posted on Wednesday, December 31, 2014 - 1:12 am: |
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Which capacitor did you change? I believe your target is capacitor C66, but not positive.
Be advised... You may cause damage to the T/R relay (no longer available) as well the the receiver audio circuitry.
The Browning "ping" was just a happy accident as the receiver audio would not shut down quickly when switching from receive to transmit, and the "ping" was actually audio feedback from the receiver speaker back into the microphone. Changing C66 causes the receiver audio to shut off even more slowly and gradually, causing the "ping" (feedback) to last longer. It's also very hard on audio circuits.
Your radio 'Mythbuster' since 1998
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3wheeler
New member
Username: 3wheeler
Post Number: 9
Registered: 11-2014
| | Posted on Thursday, January 01, 2015 - 11:57 am: |
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Thanks for all the info.but think i'll leive it like it is..Thanks Tech833 for all your help..3wheeler |
Tech833
Moderator
Username: Tech833
Post Number: 2317
Registered: 8-2002
| | Posted on Saturday, January 03, 2015 - 4:28 pm: |
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Good choice!
Your radio 'Mythbuster' since 1998
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