• Effective immediately we will be deleting, without notice, any negative threads or posts that deal with the use of encryption and streaming of scanner audio.

    We've noticed a huge increase in rants and negative posts that revolve around agencies going to encryption due to the broadcasting of scanner audio on the internet. It's now worn out and continues to be the same recycled rants. These rants hijack the threads and derail the conversation. They no longer have a place anywhere on this forum other than in the designated threads in the Rants forum in the Tavern.

    If you violate these guidelines your post will be deleted without notice and an infraction will be issued. We are not against discussion of this issue. You just need to do it in the right place. For example:
    https://forums.radioreference.com/rants/224104-official-thread-live-audio-feeds-scanners-wait-encryption.html

Info for SOME CB radio owners...

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RevGary

Senior Tropical Storm Analyst, TSRC, in Alabama
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I am removing this post - If anyone wishes to discuss this Cobra 29 squelch fix in Private Messaging, where it should have stayed in the first place, contact me there. For some persons, there may be some warranty or radio type acceptance issues if this 'fix' is done at all or incorrectly.
 
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Al42

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RevGary said:
The NEGATIVE side of the new electrolytic MUST go to the ground land circuit foil where the .0039 was removed from... observe proper polarity. The foil lands in that area are not too wide, so MINIMAL heat should be applied so as to not detach the foil land from the board.
I don't have one, so I can't say, but it might be a better idea to solder the new capacitor to the leads of the old one if the lands are that small. Maybe only a 4.7 ufd if the old one is being left in.
 

kb2vxa

Completely Banned for the Greater Good
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Hi Gary and readers,

Increasing the value of the capacitor lengthens the discharge time and so holds the squelch open longer but what about the charge side of things? Will this delay the squelch opening significantly? Usually the AGC/squelch time constant calls for a fast rise and slow decay on an SSB signal and fast rise and fast decay on AM. Squelch tails on CB could prove interesting. (;->)

BTW, 39pF seems more like an RF bypass than anything to do with audio let alone a DC control voltage. I wonder if that's the right capacitor in the right part of the detector circuit or somebody is looking at the wrong end of a resistor.
 
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