[OZAPRS] VK2US-1 To close.......

[Ray Wells]

Peter,

Allow me add my name the list of people thanking you for VK2US-1. Thank you.

With regard to the capability of the FM828, I'm sure many of you have 
seen me recommend the humble FM828 on many occasions, and with good 
reason. The radio might require a pair of decent crystals at a cost of 
about $70 but you can get the radio for free, or maybe $20. For less 
than $100 you have a radio that is almost bullet proof.

The FM828 rx has a respectably narrow front-end that was never intended 
to extract the last 0.1uV from the ether. It will do, typically, 0.3uV 
for 12dB SINAD (the spec says 0.35uV for 12dB SINAD), however, and 
return that performance under very hostile circumstances. Ask yourself 
if you want a 0.1uV rx that clams up to maybe many uV (or blocks 
completely) under harsh conditions, or a rx that hears 0.3uV 24/7. 
Standing current of the 828 is also respectably low, around 250mA when 
muted. If you take low level audio and keep the volume control wound 
right back the standing current doesn't change when a signal is 
received. The FM828 tx is continuously rated at full power (25W) and the 
unit will work over the range 10-16v. Try that with your Yaecomwood!

The rx in the Philips FM814  base station is directly from the FM828 
mobile. Yep, Philips engineered a damn good radio with the FM828 and, 
that was around 1978.

Ray vk2tv


On 06/03/13 08:39, Geoff Gatward wrote:
> Peter,
>
> Thank you for hosting the digi for the last 10+ years - it has been 
> fundamental to the APRS network in Sydney - in fact a large chunk of 
> NSW!  For those that are unaware, the coverage of this digi 
> is/was phenomenal  with direct paths out to Orange, Canberra and along 
> the coast to Newcastle and beyond Wollongong.
>
> As one of the installers of this digi I'm still blown away by how well 
> a humble FM828A mobile rig with no external filters handled the 
> intense RF environment of the CBD, being a stone's throw from GPT and 
> Centerpoint - the two largest comms sites bristling with pagers.
> The original installation was an FM92, however the high noise floor 
> rendered the digi useless, it couldn't hear anything beyond about 5km 
> from the site - swapped with the 828 and never looked back.
>
> It will be sad to see this digi close, but, life goes on :-).
>
> Cheers,
> Geoff  VK2XJG / VK8GG
>
>
> On Tue, Mar 5, 2013 at 1:29 PM, Peter VERNON <peter.vernon at jbo.com.au 
> <mailto:peter.vernon at jbo.com.au>> wrote:
>
>     Guys......
>
>     After more than 10 years the Sydney CBD WIDE VK2US-1 will be
>     shutting down in the next few days. We've lost the site.
>
>     Sorry for the short notice but that's how it is.
>
>     Regards & 73's
>
>     *Peter J VERNON | VK2US*
>
>     	
>
>     	
>
>     	
>
>     Description: Description: cid:image001.gif at 01CC4D15.2676E5C0
>
>     	
>
>     *T*61 2 9007 0977 |*F*61 2 9007 0978 | *M*61 4 1115 8231
>
>     	
>
>     *E*VK2US at jbo.com.au <mailto:VK2US at jbo.com.au> |
>     *W***www.vk2us.id.au <http://www.vk2us.id.au/>
>
>     	
>
>     	
>
>     	
>
>     	
>
>
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