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Topics - chipre99

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Equipment / 65 turns loop for vlf reception
« on: May 26, 2020, 0546 UTC »
Hello everyone. I am building an antenna loop for vlf reception (65 turns of wire in a 4 ft diagonal square loop). The final impedance is 1300 ohms aprox. How can I connect it to my sdr receiver whose antenna input is 50 ohms? Is a balun suitable? Tnx

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Equipment / Hallicrafters HT-40 in 6850 khz
« on: December 08, 2019, 0521 UTC »
I have an HT-40 hallicrafters transmitter without crystal or VFO, but I want to know if  is possible that this radio can oscillate in 6850 kHz with a crystal in that frequency. Will it be possible? (tnx, and sorry for my bad English) ::)

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