[Boatanchors] Fusing Secondaries on Boatanchor Gear

[J Forster]

Fuse the primary. Any major failure downstream will take out the fuse pronto. I'd use a standard 3AG
Slo-Blo fuse with a rating about 20% over the normal operating current of the set, absent any other
data.

Best,
-John



Frank S. wrote:

> Hello to the list,
>
> I have several BA receivers in various stages of
> restoration. I am always concerned about safety and
> add line fuses and 3 wire cords.  I am also concerned
> about protecting the components and tansformers in the
> gear which brings me to my question for the list.
>
> I am interested in fusing the transformer secondary
> leads B+ and filiment to protect against damage should
> a failure occur. I am unsure how to select the proper
> fuse for the B+ as I dont recall the stadard glass
> fuses having DC voltage ratings. Would a 250VAC glass
> fuse with the same current rating for my application
> provide protection at say 150-200V B+ or is there a
> calcualtion one can use to aid in selecting the
> correct fuse for DC?
>
> Thanks and 73,
>
> Frank
>
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