![The principles underlying radio communication . (SeeFig. 22&-A.) The relay key used for signaling has a frontand back contact—that is, it is a single-pole double-throwswitch. One side of the absorption circuit The principles underlying radio communication . (SeeFig. 22&-A.) The relay key used for signaling has a frontand back contact—that is, it is a single-pole double-throwswitch. One side of the absorption circuit](https://c8.alamy.com/comp/2CRMA6P/the-principles-underlying-radio-communication-nce-seefig-229-a-the-relay-key-used-for-signaling-has-a-frontand-back-contactthat-is-it-is-a-single-pole-double-throwswitch-one-side-of-the-absorption-circuit-is-permanentlyconnected-to-the-negative-electrode-of-the-arc-which-is-418-transmitting-apparatus-grounded-and-the-other-side-of-the-absoiption-circuit-is-con-nected-to-the-back-contact-of-the-relay-key-the-middle-con-tact-of-the-signaling-key-is-connected-direct-to-the-positiveelectrode-of-the-arc-and-the-front-contact-of-the-key-is-con-nected-to-the-antenna-when-the-key-is-2CRMA6P.jpg)
The principles underlying radio communication . (SeeFig. 22&-A.) The relay key used for signaling has a frontand back contact—that is, it is a single-pole double-throwswitch. One side of the absorption circuit
![ARISS - Amateur Radio on the ISS on X: "Contact Upcoming! From the ISS, @AstroJaws will talk to students at St Peter in Thanet CE Junior School in Broadstairs, UK live via # ARISS - Amateur Radio on the ISS on X: "Contact Upcoming! From the ISS, @AstroJaws will talk to students at St Peter in Thanet CE Junior School in Broadstairs, UK live via #](https://pbs.twimg.com/media/F8RJN3kXkAAb-uq.jpg)
ARISS - Amateur Radio on the ISS on X: "Contact Upcoming! From the ISS, @AstroJaws will talk to students at St Peter in Thanet CE Junior School in Broadstairs, UK live via #
![How to facilitate contact? Recall the dilemma: direct physical contact with ET or more indirect radio communication. - ppt download How to facilitate contact? Recall the dilemma: direct physical contact with ET or more indirect radio communication. - ppt download](https://slideplayer.com/5957443/20/images/slide_1.jpg)