=  NOW 13 WPM  =  TEXT IS FROM DECEMBER 2020 QST PAGE 50  =

ANSWER IF ASKED ABOUT A PARTICULAR TRANSCEIVER ON A PARTICULAR BAND.  WE
CAN BELIEVE THAT AN INPUT OF 10 DBM IS SAFE, BECAUSE DURING QST PRODUCT
REVIEWS WE TEST TRANSCEIVERS RECEIVERS IN THE ARRL LAB FOR IMD AT THAT
LEVEL AND HAVENT DAMAGED ONE YET.   WE HAVE SOME EVIDENCE FROM W1AW
EXPOSURE THAT 20 DBM SIGNALS MIGHT CAUSE DAMAGE, BUT THAT IS BASED ON
CIRCUMSTANTIAL EVIDENCE.  WE KNOW THAT A TRANSCEIVER OR RECEIVER AT W1AW
CAN PICK UP SIGNALS AT THAT LEVEL WHILE W1AW IS TRANSMITTING, AND WE KNOW
<  QST DE W1AW  =
THAT FRONT ENDS AT W1AW HAVE BEEN DAMAGED, BUT ITS ALSO POSSIBLE THAT THE
DAMAGE WAS DUE TO LIGHTNING OR SOME OTHER SOURCE.  DOW KEY MADE A NUMBER OF
DIFFERENT COAXIAL RELAYS OVER THE YEARS.  THE ONES THAT I HAD, CIRCA THE
1950S, HAD A SMALL CIRCULAR INSPECTION AND CONTACT CLEANING ACCESS PLATE AT
THE BOTTOM, FROM WHICH YOU COULD SEE THE CONTACTS.  MINE SHORTED THE
RECEIVER INPUT, WHILE THE RELAY WAS SWITCHED TO TRANSMIT.  IF YOURS ARE
=  END OF 13 WPM TEXT  =  QST DE W1AW  <