Types M.B. 230 & 235
Portable Telephone Instruments
This instrument consists of:-
A polished Oak Case with carrying handle, containing micro-telephone R.E. 3086, without a mouthpiece, with waterproof cord R.S. 8020 (Old Catalogue No. 2354), generator, magneto bell of 1000 ohms resistance, buzzer, press button for short circuiting the bell coils and the induction coil, press button for the buzzer signal, 2 dry cells R.K. 190 (Old Catalogue No. 600), gong silencer, special arrangements for adjusting the buzzer, and for leading in and fastening the cables, an arrangement for keeping the lid of the case wide open, or half open, and a screw driver.
If specially ordered, this instrument can be supplied with a canvas cover.
|Type||Type of Generator||No. Gen. magnets||Dimensions in inches||Weight in lbs.|
|MB 230||RH 3120||3||12 x 6.7 x 8.25||19|
|MB 235||RH 4100||4||12 x 6.7 x 8.25||19|
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