[Boatanchors] Johnson Ranger Fuses

[Rob Atkinson]

You just need one fuse, one in series on the hot side (not neutral)
which should be going to the power switch.  A fuse will work anywhere
on the transformer primary circuit but nowadays the thinking is that
if it blows on the hot side the rig won't be live.  Of course we hams
would unplug it anyway before getting into it but that's the standard
practice now.   I doubt if you'll find a fuse with a 125 v.
specification.  They all seem to be 250 v. now, but it doesn't matter
with fuses anyway.  Let's assume the rig is 50% efficient for both RF
and audio.  Fully modulated it will probably draw around 4A.  I'd just
use a 4 or 5A 250 v. fuse and call it a day.

73

Rob
K5UJ

On Fri, Nov 23, 2018 at 11:01 AM Bill Stewart <cwopr at embarqmail.com> wrote:
>
> I recently acquired a Ranger and have been looking around inside and find
> that a PO added a 3 wire plug, but NO fuses. It originally had the fuses in the
> line cord. Now looking for a place to put a couple of fuse blocks. I notice that
> the parts list calls for different value fuses in each leg of the ac to the pwr xfmr.
> Why? Can a compromise be safely made as to the fuse values. The dates are
> late 1954 on schem. and parts list. Tnx....
> 73 de Bill K4JYS
>
> FYI: F1 - 3A 125vac MDL Fusetron
> F2 - 5A 250vac MTH Fuse