[TheList] T500 TX issue

Sun Mar 21 13:44:43 AEDT 2010

Indeed it's good to see the list being used.  Appreciate the input to 
all, including Shane :)

Also really appreciate Neills input, once again he's helped me get a 
t500 going, as what he said has worked, the t500 is receiving Huntly UHF 
and AuckFire3 loud and clear.  Thanks very much!

Richard/Z-master

On 21/03/2010 10:25 a.m., Dick Thomas wrote:
> Good report Neill, I appreciate the effort taken to write it, and 
> enjoyed reading it. Shane, I am not an electrical minded person, so 
> it's good to at least see you attempt to answer someones post. This is 
> the way us oldies learn.
>
> Neill Ellis wrote:
>> 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.
>>
>> The ESA receivers I did with the external box containing a PIC micro 
>> and LCD that had the voting used to sense the PLL locking and would 
>> wait 80 milliseconds after that for the mute to open before stepping 
>> on. The control electronics/display were in the centre console of the 
>> car and the radios under my seat. It uted the stereo and used those 
>> speakers and could even be routed to the PA speaker in the front of 
>> the car if I wanted it to.
>>
>> They were great units. Ironic thing is, I haven't programmed a single 
>> PIC in about 4 years now and would need to start again from scratch 
>> as I no longer have the ASM file I used. In fact I doubt my 
>> programmer would be workable anymore (Warp
>>
>> There is no harm in offering to help or provide insight Shane, I'd 
>> rather see something we can steer in the right direction than nothing 
>> at all.
>>
>> As for the transition to digital, I'll miss having the chance to 
>> listen if I choose, but I must admit I'm not listening that much 
>> these days.
>>
>> Down in my patch, having a voting receiver is quite necessary. My 
>> personal one had two modified T515's under micro control. One would 
>> be comparing RSSI of the relevant channels while the other provided 
>> the recovered audio. Only a single front end and band filter, it 
>> splitting and being fed to the two receivers just prior to the first 
>> mixer. It used to swap between receivers regularly, but it was 
>> essentially silent, frequently changing while there was still loads 
>> of signal, a huge advantage over the normal T700 receivers which 
>> waiting until there was practically no signal before doing a comparison.
>>
>> Good to see some activity on the list for a change :-)
>>
>> Neill.
>>
> <SNIP>