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In 1945, RCA replaced the AR-88 with the CR-88 which placed the Crystal Phasing control on the front panel and reduced the size of the RF Gain and AF Gain control knobs so all three controls would fit just below the tuning dial.The CR-88A replaced the AR-88F in the diversity receivers.
By the late-1950s and early-1960s, the AR-88 was showing its age and the receivers must have become available to ham club stations as it was very common to QSO Russians on 20M CW who were using an AR-88 for the station receiver. - After WWII, RCA and Radiomarine Corporation of America (a division of RCA that handled all of RCA's maritime radio business and operations) continued to use the AR-88 and its variants in their own installations for various purposes.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.KPH operator, Fred Baxter, flanked by two RCA CR-88 receivers and a Collins 51J-4 receiver.The CR-88 receivers were the workhorses for Radiomarine Corp.While it may have seemed like "AR-88s were everywhere" the actual production numbers did not exceed 25,000 units (total WWII production of AR-88D, AR-88F, AR-88LF and CR-91 receivers.) The AR-88 was used for several purposes by Great Britain during WWII.
This is a photo of the Portsdown Tunnel communications center that handled wartime communications.The finalized AR-88 was a 14 tube superheterodyne that covered .54 to 32MC in six tuning ranges, featuring incredible sensitivity (even up to 10 meters), excellent stability and high fidelity audio along with mechanical and electronic reliability that couldn't be found in any other receivers of the day. Fowler while George Blaker handled the mechanical design.The actual production during WWII was handled by RCA's Export Sales under Charles Roberts in Camden, New Jersey.After WWII, commercial users, such as the airports and coastal stations, did continue using their AR-88LFs for sometime.Eventually, most of the receivers have made it to the Canadian government surplus sales and many were available though other Canadian surplus outlets.of America's radio station KPH during the late forties, through the fifties and even into the sixties.