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RAD27

RAD27 ; Fidelity Radio Ltd.; (ID = 1446023) Radio RAD27 ; Fidelity Radio Ltd.; (ID = 1446024) Radio
RAD27 ; Fidelity Radio Ltd.; (ID = 1446025) Radio RAD27 ; Fidelity Radio Ltd.; (ID = 1446026) Radio
RAD27 ; Fidelity Radio Ltd.; (ID = 1446027) Radio RAD27 ; Fidelity Radio Ltd.; (ID = 1447700) Radio
RAD27 ; Fidelity Radio Ltd.; (ID = 1447707) Radio
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RAD27 ; Fidelity Radio Ltd.; (ID = 1446023) Radio
Fidelity Radio Ltd.;: RAD27 [Radio] ID = 1446023 933x645
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For model RAD27, Fidelity Radio Ltd.; London:
photo with permission of owner
 
Country:  Great Britain (UK)
Manufacturer / Brand:  Fidelity Radio Ltd.; London
Year: 1973 ?? Category: Broadcast Receiver - or past WW2 Tuner
Semiconductors (the count is only for transistors) 9: T6F BF195 BC159 BF194 BC158 BC148 BC440 BC465 BC464
Main principle Super-Heterodyne (Super in general); ZF/IF 470 kHz
Wave bands Broadcast, Long Wave and 2 x Short Wave.
Details
Power type and voltage Line / Batteries (any type) / 240 / 9 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 4 inch = 10.2 cm
Power out
from Radiomuseum.org Model: RAD27 - Fidelity Radio Ltd.; London
Material Modern plastics (no Bakelite or Catalin)
Shape Portable set > 8 inch (also usable without mains)
Dimensions (WHD) 339 x 200 x 85 mm / 13.3 x 7.9 x 3.3 inch
Notes

Similar looking case to the RAD 26 & RAD 29 but this model has marine band and short wave. The method of construction of the case enables different external front and side panels to be screwed on. 

MB coverage 1.7 to 4.5 MHz, SW coverage 5.8 to 15.5 MHz.

Uses mains and PP9 battery. On AC Mains the BC440 is a simple series regulator without voltage reference to reduce hum.

Alternate Output circuit

Some models are fitted with AC127 & AC128 germanium transistors (instead of BC464 & BC465 with ACA129 (similar to AC126 with base & collector shorted) as bias diode instead of T6F bias transistor. For both versions the BC148 is the audio driver, the actual output stage is a complementary Emitter follower "totem pole" with thus no gain.

Circuit diagram reference Radio and TV Servicing books (R&TVS) book

Model page created by Mike Edwards. See "Data change" for further contributors.



All listed radios etc. from Fidelity Radio Ltd.; London
Here you find 65 models, 48 with images and 34 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



  
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