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How can I increase Dynamike range on Cobra 29?
Posted: Sunday 18th Jan 2009, 18:11
by Shadow
This has been something I've wanted to do for some time now. I've done it on my Cobra 25 and it works well and I wanted to know if anyone knows how to do it on a 29.
On the 25, you decrease the value of the resistor in R76. I know I can get a power mike, but that's not the point. Any ideas?
Re: How can I increase Dynamike range on Cobra 29?
Posted: Wednesday 25th Feb 2009, 14:38
by 1096
Change R67 from a 33 ohm to a 10 ohm.... Enjoy
Re: How can I increase Dynamike range on Cobra 29?
Posted: Wednesday 25th Feb 2009, 17:15
by frogman296
does this in any way affect the amount of background noise the mike may pick up??
Re: How can I increase Dynamike range on Cobra 29?
Posted: Thursday 26th Feb 2009, 6:50
by 1096
If you are using a stock mic it will make it more sensitive and increase response but you will get a bit more noise.... If using a noise cancelling mic, this will give it a nice boost without the obvious worry of increased background noise.... You could just keep the mic gain lower with a stock mic.... Do not do this if using a power mic.... Your just opening up the mic amp a little.... I do this on all my radios without echo boards ( echo board has a mod. amp so this is unnecessary ) and never had anyone complain of background noise when using a noise cancelling mic.... Keeping your AMC intact is a plus.... Try it and if you hate it then just swap it back.... The original R67 is a 33ohm 1/4 watt resistor....
Re: How can I increase Dynamike range on Cobra 29?
Posted: Friday 17th Apr 2009, 9:43
by Shadow
Awesome! Thank you very much for the info 1096. Do you know if there is a way to do it on a 148 GTL?