[ARC5] Remote tuning cable length ?

[Hubert Miller]

Was looking thru my photos and rediscovered this. I see one ARB is locally controlled
and one remote. This brings to mind a question: how long could the tuning cable be?
I labeled this photo in my archive as "K-28 Blimp" but I have another photo with same
label but has 2 RU receivers instead, with the same GP transmitter. Can you shed light
on what lighter than air craft these actually should be labeled?
tnx,  Hue Miller

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