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Portland 8503

Portland 8503; Lissen Ltd.; London (ID = 1316398) Radio
 
Portland 8503; Lissen Ltd.; London (ID = 1316399) Radio
 
Portland 8503; Lissen Ltd.; London (ID = 1316400) Radio
 
Portland 8503; Lissen Ltd.; London (ID = 1316401) Radio
Portland 8503; Lissen Ltd.; London (ID = 1352721) Radio Portland 8503; Lissen Ltd.; London (ID = 1352732) Radio
Portland 8503; Lissen Ltd.; London (ID = 1352733) Radio
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Portland 8503; Lissen Ltd.; London (ID = 1352721) Radio
Lissen Ltd.; London: Portland 8503 [Radio] ID = 1352721 914x1118
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For model Portland 8503, Lissen Ltd.; London and Richmond, Surrey:
From service sheet
 
Country:  Great Britain (UK)
Manufacturer / Brand:  Lissen Ltd.; London and Richmond, Surrey
Year: 1939/1940 Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 5: ECH3 EF9 EBC3 EL3 AZ1
Main principle Superheterodyne (common); ZF/IF 452 kHz; 2 AF stage(s)
Tuned circuits 7 AM circuit(s)
Wave bands Broadcast, Long Wave and Short Wave.
Details
Power type and voltage Alternating Current supply (AC) / 200-215; 216-235; 236-250 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil)
Power out
from Radiomuseum.org Model: Portland 8503 - Lissen Ltd.; London and
Material Wooden case
Shape Tablemodel, with any shape - general.
Notes

This is the penultimate Lissen range. The York 8574/A and Lancaster 8647 are the "short" versions (ECH3, EF9, EBL1, AZ1) in 1940.
The Lissen family is: Radiogram 8529 manual, Radiogram 8533 manual, 8539 automatic mixed sizes Then in 1940, Radiogram Salisbury 8480 manual (Ever Ready 5380), Radiogram Winchester 8481 automatic (Ever Ready 5381). The radiograms differ only in deck fitted and variations of case design.

The Ever Ready badged version is 5203.

Source of data - - Manufacturers Literature

Model page created by Roy Johnson. See "Data change" for further contributors.



All listed radios etc. from Lissen Ltd.; London and Richmond, Surrey
Here you find 145 models, 109 with images and 54 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.


 


Forum contributions about this model
Lissen Ltd.; London: Portland 8503
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lissen: Octal versions of 8503, 8529, 8533, 8539, 8480 and 8481
Michael Watterson
09.Sep.12
  1

Several sites list 12K8GT (triode/Hexode) 12K7GT (RF/IF Pentode) 12Q7GT (dual diode/triode) 35Z4 (Half Wave Rectifier) as valves (tubes) for 8503 and the related Radiograms (1939: 8529, 8533, 8539 [Salisbury?] and 1940: 8480, 8481 [Portland, Winchester?]) however these are 12V 150mA types, apart from 35Z4 which is 35V 150mA.

Also logically a 35L6GT or similar should be in the list, no output tube is listed!. This adds to 106 volts, so would need a 25W (approx) dropper for 250V. The Radiograms need AC for the deck. So if these exist they may be late production in early 1941 (just before the factory destruction) due to production shortage of the edge connect tubes. The 12K8GT, 12K7GT, 12Q7GT, 35L6GT and 35Z4 were UK produced as well as imported from US in 1940s. Note that some of these tubes were produced "button" base rather than typical Octal "pinch" bases. Ones with a metal skirt and flat Bakelite pin mount are often pin rather than wire ended inside the base holder, thus are shorter tubes.

If these had been simple post war or 1942 to 1945 production, or Service/Dealer repairs the 6.3V Octal tubes simply changing the socket base would have been more likely (ECH33, EF39, EBC33, EL33 & AZ31) . There is no evidence that Ever Ready produced other than the "All Dry Battery Portable" range (5214 and Forces Entertainment models) after the Lissen factory destruction as space was limited even after the final move to Park Lane Wolverhampton.

After 1941 no mains models at all seem to have been produced and unlike other makers Ever Ready never sold a Battery set in the 1950s with built in mains adaptor other than the Export only BEREC Fiesta. The only post 1940 Ever Ready record player is a rare transistor portable player only the Skygram.

The last mains models announced were in 1940, Lissen Portland & Winchester, the  8480 [5380], 8481 [5381], the York 8547/A and Lancaster 8647 (both "short" superhets, using EBL1 rather than EBC3 + EL3).

 

 
Lissen Ltd.; London: Portland 8503
End of forum contributions about this model

  
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