[TheList] T500 TX issue

Tue Mar 23 05:14:07 AEDT 2010

Hi Shane,

I keep meaning to acquire some 76-90MHz jap import radios to get the 
tuner modules out of them. Intention being to build a dual receiver 
based around them. The S meter may be a challenge as I doubt they will 
have any form of AGC.

It's in it's dying days but I'm still schemeing.

Most Motorola stuff 10 years ago was based on a 14.4 MHz reference, so 
seeing 7.2 doesn't surprise me.

Regards,

Neill.

Shane V wrote:
> Awesome report...This makes for great reading....Thanks Neil..
>
> Auckland is lucky in one advent I guess, being last to move
> digital...Listening in for some light back ground chatter will be
> missed by me also...Still have fire and ambo chatter for the time being I
> guess
>
> Auckland has a colourful life on the edacs trunking channels from what I
> recall...may have to resurrect my 800 MHz antennas..
>
> My tech time is with domestic tuners...everything is processor controlled
> with a PLL being controlled by AGC feedback and s curve
> tracking for final lock...One rock on 7.2 MHz to look after everything to do
> with tuning.
>
> I have a RCA portable in front of me that used to be police many moons
> ago...I can't bring myself to pass it on or throw it out..
> It still has a label with Rotorua Temp on it.  All D band channels I seem to
> recall.
> It is set up with crystals RX and TX for the eight possible channels...It
> still works too....
>
> Nice to see us flare up again 
>
> Cheers guys..
>
> -----Original Message-----
> From: thelist-bounces at radiowiki.org.nz
> [mailto:thelist-bounces at radiowiki.org.nz] On Behalf Of Neill Ellis
> Sent: Sunday, 21 March 2010 9:30 a.m.
> To: thelist at radiowiki.org.nz
> Subject: Re: [TheList] T500 TX issue
>
> You are obviously lucky enough to not be familiar with them. There is a 
> multichannel kit that can scan, but there weren't many made and it's a 
> painfully slow scan as the PLL doesn't lock very quickly. I don't know 
> of any voting on T500's except perhaps the control channel antics on the 
> T555TR.
>
>
>
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