I have in my hand a genuine Lucas fuse, found in a TR3 fuse block, which
it fits perfectly. Although it is very slightly shorter (1.20" instead
of 1.25") than an AGC fuse, it is certainly much larger than a 5x20mm
fuse.
And, since TR4s take the same fuse block as later TR3s, and AFAIK all
TR3s took the same size fuses, I doubt seriously that a 5x20mm fuse will
fit Art's fuse block.
According to the Haynes manual, the fuses in the fuse block on a TR4
should both be 25 amp, and the in-line fuse for the horns should be 35
amp. So, as easily obtainable replacements, I suggest AGC-15 for the
fuse block, and AGC-25 for the in-line holder.
BTW, the catalog on Buss' web site lists both "North American standard"
5x20mm fuses, and also "British household" standard .25"x1.25" fuses.
I'd say that makes physical size a pretty poor indicator of fuse
standard <g>
Randall
59 TR3A daily driver
George Richardson wrote:
>
> I've got no augments except one - The lucas fuses that I have from both my
>Stag
> and 2 Jag XJ6 are identical in size to what used to be the old BAG size in
>the US.
> Identical.
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