Ralph: You do not say what you are using for a CTCSS decoder. If you are
using the normal GE MII decoder circuit board; The first LSI module in the
audio path has an active Low Pass filter as a part of the circuit. I have
seen this circuit become defective and pass all audio components; in which
case you can talk down the CTCSS decoder. I would suggest that you replace
the CTCSS plug in circuit board or replace the first LSI Module on the
board.If you are using an off brand decoder, change it out for a standard GE
one.
Fred
W5VAY
----- Original Message -----
From: "Ralph Hogan" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Friday, December 24, 2004 10:21 PM
Subject: RE: [Repeater-Builder] Help: GE M2 PL decode dropout on voice peaks
and IDA control shelf
>
> Thanks guys for all the comments.
>
> Yes, the one ht I normally use on the bench may be a little hot on PL (er
I
> mean CG hihi) Dev and voice dev, but not way out of bounds. Kind of one of
> the reasons I use that one, is it's on the edge as a user radio might be.
>
> The point is, it's never done that with any other GE M2 on the bench
before.
> Thus my questioning of the hardware under test.
>
> As for quality and standardization of radios, I agree. They are all over
the
> place audio wise. Sure I could crack open this particular HT and turn it
> down to 200 Hz pl deviation and 4 KHz peak voice dev. I know if I put the
> repeater up on the mtn site today, some of my users will talk it off too.
It
> would be hard to bench calibrate all the users radios out there. Again, I
> just think there is something in the hardware I'm missing.
>
> I did grab two other ht's as stated earlier and they created the same
> problem. One HT was a moto saber btw, so hopefully they did their homework
> correctly on PL injection into the transmitter audio chain. I dont
remember
> the exact particulars on the Saber, but I remember it does have a lower PL
> dev and much lower audio dev. Still shuts the PL decoder down.
>
> I looked at the audio levels going into the pl deck. Didn't look out of
> whack.
>
> I'll try changing the PL tone from 127.3 to something lower that I
normally
> use. That was a good suggestion and easy to try. Maybe I have one of those
> voices for 127.3.
>
> Someone mentioned supply voltages. The 12 VDC supply is the bench supply
> right now. I adjusted the 10 VDC a long time back when first starting with
> this 'new' repeater station. But, will recheck the 10 VDC, just in case.
>
> Well its getting late and Santa is near (for the kids). Thanks again guys,
> you given me some things to think about.
>
> best holiday wishes,
>
> Ralph W4XE
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>
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