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goshante / ats20_ats_ex

Advanced and re-imagined firmware for ATS-20 Receiver based on Si4735 (or Si4732). Прошивка с расширенным функционалом.
MIT License
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AIR BAND #16

Closed pu3agg closed 1 month ago

pu3agg commented 1 month ago

Can do match the ats20+ to sintonize and hear Air band in AM Mode?

118mhz - up

G8PTN commented 1 month ago

Hi, To receive the air band in AM mode you would need to have a down converter to move the frequency into the HF band, which supports narrow band AM demodulation.

It would be possible to build a mixer circuit with a programmable oscillator, similar to those proposed on the ATS25 receivers. Unfortunately on the ATS20 the additional firmware required to control the oscillator probably would not fit in the code space of the Nano without removing other features.

Relatively low cost down converters are available, see example below. This would not require any firmware or hardware changes. Two versions of the down converter are available, 100MHz and 110MHz. For example using the 100MHz version, to listen to 120MHz, you would tune to 20MHz on the ATS20. https://www.youtube.com/watch?v=JILgwTiw1cM

73, Dave