[Johnson] Surge protection for Johnson BA's

[C Eus]

Check out that link I put at the bottom of the page.
It's an inline surge protector. 

You know it's a beautiful sound when all you hear is a
"click" of the toggle switch followed by NO THUD!

I found my stuff on ebay. 

Cal, N6KYR. 
--- Brian Carling <bcarling at cfl.rr.com> wrote:
> All of the Johnson rigs I have used made that scary
> THUD when you turn 
> them on.
> 
> What is this "device" that you put in line, please?
> 
> C Eus wrote:
> 
> >All:
> >During the final testing of my Viking 2, I noticed
> a
> >pronounced "thud" whenever I hit the filament
> toggle
> >switch. The "thud" is a manifestation of some large
> >amount of instantaneous current as it hits the
> primary
> >of the power transformer. As AC comes in, your not
> >guaranteed that the waveform will come in at any
> zero
> >point of AC waveform. It could be at a max of 115
> VAC
> >while the primary doesn't have some resistance or
> >reluctance to stop the incoming current flow. 
> >
> >I suspect enough of these "thuds" over the lifetime
> of
> >a BA will eventually cause it to fail. After
> hearing
> >that sickening "thud" for so many times, I decided
> to
> >do something about it. I bought some surge
> protection
> >devices on ebay. I already used on on my S-40 (in
> >addition to putting an inline fuse with the cord).
> In
> >the case of the Viking 2, I took the jumper from
> one
> >of the filter coils to the fuse and in its place in
> >went one of the surge protection devices. After
> >installing the device and trying the filament
> switch
> >again, no longer were the "thud" sounds of inrush
> >current were heard! It didn't affect the
> performance
> >of the Johnson and needless to say, this is one
> >transformer that I don't think will see the light
> of
> >"P.Dahl's Day". 
> >
> >For more info on these units, please refer to the
> >following URL (put out by Canadian Ham Jan Skirrow
> of
> >"Boatanchor Dreams" fame).
> >http://skirrow.org/Boatanchors/TechTalk3.pdf
> >
> >73 de Cal, N6KYR/8
> >
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