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KB 102

KB 102; Kolster Brandes Ltd. (ID = 2335204) Radio
KB 102; Kolster Brandes Ltd. (ID = 2334919) Radio KB 102; Kolster Brandes Ltd. (ID = 2334922) Radio
KB 102; Kolster Brandes Ltd. (ID = 2334937) Radio KB 102; Kolster Brandes Ltd. (ID = 2334928) Radio
KB 102; Kolster Brandes Ltd. (ID = 2055228) Radio KB 102; Kolster Brandes Ltd. (ID = 2055229) Radio
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KB 102; Kolster Brandes Ltd. (ID = 2334919) Radio
Kolster Brandes Ltd.: KB 102 [Radio] ID = 2334919 1400x906
Select picture or schematic to display from thumbnails on the right and click for download.
For model KB 102, Kolster Brandes Ltd. (KB, K.B., ITT); Foots Cray; GB:
The control knobs seen in this image are not original
 
Country:  Great Britain (UK)
Manufacturer / Brand:  Kolster Brandes Ltd. (KB, K.B., ITT); Foots Cray; GB
Year: 1928 perfect model Category: Broadcast Receiver - or past WW2 Tuner
Valves / Tubes 3: PM12 PM1HF PM22
Main principle TRF with regeneration
Tuned circuits 2 AM circuit(s)
Wave bands Broadcast (MW) and Long Wave.
Details
Power type and voltage Storage and/or dry batteries
Loudspeaker - This model requires external speaker(s).
Power out
from Radiomuseum.org Model: KB 102 - Kolster Brandes Ltd. KB, K.B.,
Material Wooden case
Shape Tablemodel, low profile (big size).
Dimensions (WHD) 18 x 11 x 8 inch / 457 x 279 x 203 mm
Notes

Screen gride battery set. Later version of model Brandeset IIIA but using screen grid valves. This model 102 has a single tuning control, the very similar model 163 has dual tuning controls.

The radio has reaction over 2 valves, from the grid of the PM12 to the anode of the PM1HF. 

In order to function well, the chokes in the anode of the PM12 have to have a self resonance lower than the lowest frequency of the band selected.

The reaction on LW relies at the cable capacitance between the tuning capacitor wiring and the reactance capacitor wiring, wich are closely routed for approx 3 inches, The connection from the reactance capacitor and the grid of the PM12 is switched OFF during LW reception to avoid excessive reactance.

Mentioned in Radio! Radio!
Literature/Schematics (1) - - Manufacturers Literature (Date given in KB Schedule of Products)

Model page created by Keith Staines. See "Data change" for further contributors.



All listed radios etc. from Kolster Brandes Ltd. (KB, K.B., ITT); Foots Cray; GB
Here you find 395 models, 347 with images and 239 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.




  
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