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02-18-2015 03:00 PM
# ADS
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The most accurate description of the Ff33 I have ever seen - nicely done. A common mistake made is battery strength. The field phone only requires 1.5 volt as mentioned. Here is some of my phone gear in use. NH
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Neil Hever
The most accurate description of the Ff33 I have ever seen - nicely done. A common mistake made is battery strength. The field phone only requires 1.5 volt as mentioned. Here is some of my phone gear in use. NH
Thanks for pointing that out, i know its 1.5v but maybe it says in the context like one inside the phone one in reserve?
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Leonardo - what you posted is accurate. I think those encountering field phones got confused by the size of the battery compartment. Here in the US - a large 6 volt battery can fit in the compartment. You will note the compartment has a removable bakelite battery box. I assume this was there to protect the phone components from battery leakage. Some of the original 1.5 volt batteries were activated by water. If they leaked it could cause acid to damage interior components. Batteries for this purpose were larger at that time as you can see in the one photo posted. They were larger but not less efficient. Hans Winter, a Heer veteran, advised me on my research that a good 1.5 volt German battery could last up to 6 months without replacement. NH
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