• Country
• United States of America (USA)

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

• Year
• 1947/1948

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 52202

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 cm = 1.6 inch

• Material
• Bakelite case

• from Radiomuseum.org
• Model: Porto-Baradio PB-520 Ch= 9008-B [new version, walnut] - Porto-Server -Products Inc.;

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

• Dimensions (WHD)
• 24 x 7.5 x 10 inch / 610 x 191 x 254 mm

• Notes

• Rider's page Porto-Server Inc. 15-1 and 15-2 shows the schematic for the older versions of models PA-510 with chassis 9008-A and PB-520 with chassis 9008-B with the same schematic. Information for this newer model is in Rider's page Porto-Products Inc. on pages 18-1 and 18-2 with not much difference. See the older PB-520 here.
  
  This radio is a combination bar and radio, built-in loop antenna. Chassis completely housed and protected against any liquid. Comes in three color combinations - walnut-with-ivory, black-with-ivory and ivory-with-gold.
  For the Porto-Server PE-610 with chassis 9022-E and PF-611 with chassis 9022-F there is only one schematic in Rider's 15-3 and 15-4. No new version seems to exist.

• Net weight (2.2 lb = 1 kg)
• 19 lb 0 oz (19 lb) / 8.626 kg

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 18 = 1949 and before

• Mentioned in
• Radio Retailing (Radio & Television R.) (May 1947 page 48.)

• Literature/Schematics (1)
• Photofact Folder, Howard W. SAMS (Set 33, Folder 483-16)

• Literature/Schematics (2)
• Le Guide du Collectionneur TSF Biraud/Foster, Vol. I (page 142)

• 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