Ytwati
Newbie level 4
Hello everybody I am interested in astronomy so I decided to make a radio telescope I took a long time to find I good one that I can make I am not making it exactly because i have to buy
a kit from internet https://stargazerslounge.com/topic/75170-basic-jupitersolar-radio-astronomy/ and i am not doing that. that kit is a sipmle direct conversion receiver using NE612 and LM386 and i am making one using NE612 and LM386
and my problem is i have receive on 20.1 MHz ( Jupiter radio noise ) and i have to make lower by using the Ne612 mixer so it can be in audio frequency 20 Hz to 20 Khz .
if i use a 20 MHz local oscillator then the 20.1 MHz signal will be 0.1 MHz and that is 100 Khz and it isn't in audio band so i can hear it or connect it to the computer sound card
i want to know what is the frequency of the local oscillator i have to use so the 20.1 MHz signal can be in audio frequency band. :?:
a kit from internet https://stargazerslounge.com/topic/75170-basic-jupitersolar-radio-astronomy/ and i am not doing that. that kit is a sipmle direct conversion receiver using NE612 and LM386 and i am making one using NE612 and LM386
and my problem is i have receive on 20.1 MHz ( Jupiter radio noise ) and i have to make lower by using the Ne612 mixer so it can be in audio frequency 20 Hz to 20 Khz .
if i use a 20 MHz local oscillator then the 20.1 MHz signal will be 0.1 MHz and that is 100 Khz and it isn't in audio band so i can hear it or connect it to the computer sound card
i want to know what is the frequency of the local oscillator i have to use so the 20.1 MHz signal can be in audio frequency band. :?: