CSR-5Y and Diversity Reception
The Marconi CSR-5Y, a variant of the CSR-5, was altered for diversity reception. Rather than having a toggle switch for the AVC, a three position rotary switch is used. It is marked AVC - OFF - SINGLE. The Send/Rcv switch is eliminated since the receiver is intended to be in receive mode all the time. There is a screw-on microphone type chassis connector fopr the AVC line.
The AVC was probably derived from an external comparator when in Diversity mode. In all other respects, the ' Y' variant is identical to its more common cousin. The CSR5Y would mostly likely be found in a shore installation.
Basically the CSR-5Y is the same as the CSR-5 series found elsewhere in the web page. The CSR-5Y has the 2 screw terminal audio tap, dual ganged shaft crystal filter and restamped 6SG7 labels for V2 and V4.
From the nameplate:
CSR5Y #105-865 Serial 112
|CSR-5Y owned by WF2U. (Photo by Meir, WF2U)|
|During WWII, most Marconi CSR5's saw service in shore installations. They could be used for single receiver reception (Model CSR5 or 5A) or in diversity mode using the Model CSR-5Y .This rare, but low-res photo illustrates three CSR-5Y receivers in a triple diversity configuration. (Photo source unknown)|
|Top and rear view of chassis with cover in place. Since CSR5Y's were mainly rack mounted, Marconi made a custom cover for the unit. (Photo by Meir, WF2U)|
|Rear of chassis. (Photo by Meir, WF2U)|
|Closeup view of power and signal connectors. (Photo by Meir, WF2U)|
Contributors and Credits:
1) Meir Ben-Dror, WF2U <wf2u(at)ws19ops.com>