Has the noise been there all along?

It may be just the nature of the beast.

There is an article on the RB web site about modifying a mobile audio 
squelch board to work in a base/repeater station, one of the benifits to 
doing so is the better muting of audio from the receiver, this is 
because there are two shunt switches in the squelch chip and the mobile 
configuration uses both to mute the audio, in the  repeater/base station 
configuration one of the shunt switches is used for station control like 
cos and not as affective at totally muting the audio. As designed the 
repeaters with their internal controller never had much hang time so it 
wasn't as  noticeable.


tom


On 5/23/2010 12:10 AM, Tim - WD6AWP wrote:
> I have a small amount white noise on the TX of a Micor repeater. It is most 
> noticeable in the hang time but it's not coming from the controller. It's 
> still there with the controller completely removed and pressing PTT on the 
> station control card. It's more noticeable on some radios, perhaps radios 
> with higher audio frequency response.
>
> Anyone ever run into this before?
>
> Tim WD6AWP
>
>
>
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