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H.F. Unit

H.F. Unit ; Mullard Wireless, (ID = 1396253) Kit
H.F. Unit ; Mullard Wireless, (ID = 1396201) Kit H.F. Unit ; Mullard Wireless, (ID = 1396202) Kit
H.F. Unit ; Mullard Wireless, (ID = 1396203) Kit
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H.F. Unit ; Mullard Wireless, (ID = 1396201) Kit
Mullard Wireless,: H.F. Unit [Kit] ID = 1396201 842x1400
Select picture or schematic to display from thumbnails on the right and click for download.
For model H.F. Unit, Mullard Wireless, London (see also Mullard Radio Valve):
'Radio for the Million' Vol2 No 4 1928
 
Country:  Great Britain (UK)
Manufacturer / Brand:  Mullard Wireless, London (see also Mullard Radio Valve)
Year: 1928 Category: Kit (Parts plus instruction) or building instructions only
Valves / Tubes 1: PM2HL
Main principle RF-Circuit or wave trap (separate, can also be an antenna with amp.)
Tuned circuits 1 AM circuit(s)
Wave bands Broadcast (MW) and Long Wave.
Details
Power type and voltage Storage and/or dry batteries / 120 & 2 Volt
Loudspeaker - - No sound reproduction output.
Power out
from Radiomuseum.org Model: H.F. Unit - Mullard Wireless, London see
Material Special material, described in the notes.
Shape Tablemodel, with any shape - general.
Notes

A tuned RF premap to add to the Mullard Master Three or Mullard Master Three Star. Presumed to use same valve/tube as the RF on the Master Three Star.

"Blueprint" supplied loose in "Radio for the Million" Vol2 No 4 1928 (1/- = 0.05 GBP), which lists parts (except the valve!) and gives wiring instructions. Has Neutralisation adjustment. Five page article. Note that in this period MW is described as "Short Waves".

Schematic from booklet is simplified by omitting the LW/MW coil connections and switching, the text warns to switch the Master Three (either model) and H.F. Unit both to same band.

Text discusses an ebonite front panel. Baseboard is specified as 5 ply 6" x 10" but this may be to accomodate the main receiver as 6" x 7" x  10" cabinet is recommended.

Price in first year of sale 0.05 GBP
Literature/Schematics (1) "Radio for the Million" Vol2 No 4 1928

Model page created by Michael Watterson. See "Data change" for further contributors.



All listed radios etc. from Mullard Wireless, London (see also Mullard Radio Valve)
Here you find 139 models, 107 with images and 57 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



  
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