15-09-2010, 9:29
czesc,
autor pisze:
This set can be made to operate on lower frequencies by adding turns to each winding on the ferrite rod and parallelling all gangs of the tuning capacitor used. Gradually add turns until stations in the bottom end of the AM broadcast band (530 - 700 kHz) are at the top end of the receiver's tuning range. The main reason why one would wish to do this is to receive the aircraft beacons in the 200 to 500 kHz band and to experiment with receiving the low frequency tests from Tasmania on 177 kHz.
czyli:
stopniowo dodawaj zwoje
dodaj równolegle kondensatory do tych zmiennych (ja bym dał tyle samo co max pojemnosc kondensatora zmiennego)
do tej cewki sprzegającej to ja "na oko" dodałbym ze 4-5 zwoi
pozdrowienia
Artur sp2qca
autor pisze:
This set can be made to operate on lower frequencies by adding turns to each winding on the ferrite rod and parallelling all gangs of the tuning capacitor used. Gradually add turns until stations in the bottom end of the AM broadcast band (530 - 700 kHz) are at the top end of the receiver's tuning range. The main reason why one would wish to do this is to receive the aircraft beacons in the 200 to 500 kHz band and to experiment with receiving the low frequency tests from Tasmania on 177 kHz.
czyli:
stopniowo dodawaj zwoje
dodaj równolegle kondensatory do tych zmiennych (ja bym dał tyle samo co max pojemnosc kondensatora zmiennego)
do tej cewki sprzegającej to ja "na oko" dodałbym ze 4-5 zwoi
pozdrowienia
Artur sp2qca