of America's radio station KPH during the late forties, through the fifties and even into the sixties.
Photo from KPH History website: greatest communications receiver creation was the AR-88, a receiver that achieved its renown by providing top performance and high reliability in service as a surveillance and intercept receiver during WWII and later as a "workhorse" for the RCA and Radiomarine Corporation of America coastal stations, usually in triple diversity receivers that provided world-wide ship-to-shore message handling.
W9DXX, Alice Bourke, Chicago, IL ca.1935 - from Frank C. This interesting photo shows a very early HRO receiver with a Peak Pre-selector to the left and a 1934 AGS-X receiver to the right.
Alice Bourke was a reporter for the Chicago Tribune along with being very active in ham radio.
Sometimes there is a space after the first 3 digits, sometimes a hyphen.
“She had a run in with some crows and they managed to take her eyes, and most of her tongue,” FARRM owner, operator and president Melissa Foley said.They should be used in conjunction with other identifying factors such as serial and model numbers to help to correctly identify your instrument.The source-date code is usually comprised of a 6 or 7 digit number.The HRO main tuning dial was unlike any other - a non-illuminated micrometer device that displayed numbers behind small openings as the dial was rotated.Each of the coil sets had graphs that could be correlated to the micrometer readout to determine tuned frequency.“She was always trying to comfort herself – kind of wrap herself up into a little snuggly blanket,” Foley said. Meet Daisy (left) and Merlin (right) - two young blind buddies comforting each other as they get new lease on life @ Central AB farm rescue.pic.twitter.com/C3T5M4yj Fu — Taylor Oseen (@CTVTaylor) May 21, 2017 Merlin had been at the sanctuary for just over a month.RCA had to update their "cost no object," highly reliable military/commercial product and the AR-88 was the result.Design stages probably date from as early as 1939 and the demands of WWII in Europe pushed RCA into having the AR-88 ready by early 1941.RCA's AR-88 planning may have chronologically followed their AR-77 ham receiver but the AR-88 owes much of its design concept as a replacement for RCA's aging commercial-military receiver, the AR-60.The AR-60 had been introduced in 1935 and was still being built as late as 1940.