. QST . f thevoltage will be positive, the other half the positive half cjcle, electrons from thefilament will flow to the plate. Current will notflow during the negative half cycle. This gives usa pulsating which can then be run through afilter to smooth out the ripple that will be present. 10. How fast does a radio signal travel? Radio signals travel at the same speed as lightwaves, 186,000 miles per this connection, it is interesting to note thatrecentlj two amateurs beamed a signal at themoon and then listened for the reflected signa
. QST . f thevoltage will be positive, the other half the positive half cjcle, electrons from thefilament will flow to the plate. Current will notflow during the negative half cycle. This gives usa pulsating which can then be run through afilter to smooth out the ripple that will be present. 10. How fast does a radio signal travel? Radio signals travel at the same speed as lightwaves, 186,000 miles per this connection, it is interesting to note thatrecentlj two amateurs beamed a signal at themoon and then listened for the reflected signal had to travel a distance of some440,000 miles to get to the moon and radio traveling at the speed of light, thedistance would be covered in about 23^ can imagine the thrill the two amateurs ex-perienced when they sent the signal and then acouple of seconds later heard the faint beepof the returning signal. 11. What is the relationship of the 80-meterband to the band?. They are the same. Probablj one of the mostconfusing things the newcomer encounters is thereference to amateur bands by either meters or {Cordinuei on page IS4) July 1955 35 Lightning Protection for the Transmitting Antenna Grounded System for Open-Wire FeedersBY R. C. CORDERMAN,* W4ZG AN old adage says lightning never strikes twice/\ in the same place. You may not agree with-^-^ this, but if it strikes you once it wont makeany difference whether j^ou do or dont agree. Radio amateurs for the most part invitedestruction l)y lightning bj- neglecting to provideany protection against it. The antenna usuallyassociated with amateur radio transmittingequipment is most vulnerable to lightning due toits length and height. To validate your insurance,your antenna installation must comply with theNational Board of Fire Underwriters ElectricalCode which sajs: Lightning Arresters — Transmitting Stations. Exceptwliere protected by a continuous metallic shield (coax)which is permanently and
Size: 2078px × 1203px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectradio, bookyear1915
