[TheList] 136.5Mhz

Sat Oct 21 10:02:50 AEDT 2017

FM can travel a LONG way and if you have a receiver with really good 
selectivity you can pickup stations from other areas no problem. The 
American Fifi brand car stereo's that The Warehouse once sold have 
pretty good selectivity I have found.

On 21/10/2017 11:09 a.m., Chris wrote:
> 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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