• Country
• United States of America (USA)

• Manufacturer / Brand
• Porto-Server (-Products) Inc.; Chicago

• Year
• 1941–1946

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 52203

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Tubes
• 5

• Valves / Tubes
• 12SA7 12SK7 12SQ7 50L6GT 35Z5GT

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)

• Tuned circuits
• 6 AM circuit(s)

• Wave bands
• Broadcast only (MW).

• Power type and voltage
• AC/DC-set / 26 watts, 110 - 120 Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 inch = 10.2 cm

• Material
• Bakelite case

• from Radiomuseum.org
• Model: Porto-Baradio PA-510 or PB-510 Ch= 9008-A [ivory] - Porto-Server -Products Inc.;

• Shape
• Design Radio or Novelty / Gadget - fancy or unusual shape.

• Notes
• The first type Porto-Baradio PA-510 or PB-510 with chassis 9008-A is in color Ivory.
  There is obviously an error in Rider's: while the manufacturers parts list calls PB-510, ivory (and PB-520, walnut), the typed model name added by Rider is PA-510. Unfortunately Sam's Photofact copied this erroneous name and even printed it onto the Service sheets. Same applies to Sam's added Chassis number, which initially is the Stewart Warner Model number. The 9008-A is definitely the pre-war production, while 9008-B appears to be the post war production which first had only a Walnut cabinet as PB-520 - but is on the same Rider's schematic.

• External source of data
• Ernst Erb

• Mentioned in
• Rider's Perpetual, Volume 18 = covering late 1947 to early 1948 (Porto 18-1 and 18-2.)

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Dat 3-48, set 33, folder 483-16)

• Other Models

• Here you find 9 models, 5 with images and 9 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Porto-Server (-Products) Inc.; Chicago