[TheList] 136.5Mhz

Sat Oct 21 09:09:41 AEDT 2017

Hmmmm interesting. 

There is no 97.3 in Auckland - Just did a search and nothing in the harmonics.. 
A friend is bringing a scanner over so we will try another radio and see if there is anything on his receiver :) 

> On 21/10/2017, at 11:04, Mark Robinson <mark.robinson at paradise.net.nz> wrote:
> 
> On 21/10/17 10:18, Chris wrote:
>> Just stumbled across 136.5Mhz after installing two new antenna’s at home, and I am just wondering what it is..
>> The MED state its an ‘Every Person’ license with special condition of 6.
>> (6)   Use is limited to aeronautical mobile (Off-Route) services with classes of emission ‘A3E’ in the band 130.000-136.000 MHz and ‘A2D’ in the band 136.0125-136.9875 MHz. The channel arrangements in the band 130.0000-136.9875 MHz are as prescribed in PIB 23 - Mobile Service Bands in New Zealand.
>> I am currently (in Narrow FM) getting Jazz (transmitted in Wideband FM) - but I don’t think its an STL and just wondering why anyone would want to use it..
>> Let alone transmitting WideBand FM on this channel - and after reading condition 6 - i am not sure it should be there.
>> Just seems an odd frequency to use..
> 
> If we assume the intermediate frequency (IF) of your receiver is 21.4MHz it's a reasonable guess that the local oscillator (LO) is on 125.1MHz when you are tuned to 136.5MHz.
> 
> 136.5 - 21.4 = 125.1
> 
> This gives an image frequency of 125.1 - 21.4 = 97.3MHz which is used by Radio Bay of Plenty Ltd among others.
> 
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