--- In ham_amplifiers@..., Frank Goenninger <frgo@...>
wrote:
Hi all:
I am about to finish my HV power supply. One thing missing still
is
an appropriate HV fuse to be put between C bank and glitch R.
While
closely examining the pictures in the photos section of this group
I
couldn't find any European manufacturer or distributor of HV fuses.
I found SIBA () - but they do provide fuses for
even "bigger" applications... I'd need something suitable for the
3,5
kV / 3 A coming out of my 300 ?F C bank...
Any suggestions? Thx for feedback!
#### SSON [surplus sales of nebraska] has tons of Buss HV
fuses. The HVU-3 is what I use. [rated at 3A @ 5 kv AC]
These are 13/16" diam on the ends, and fit standard 3/4" fuse
clips. The fuse itself is 13/16" diam x 5" long. They have the
3/4" clips too... in 2 x diff styles.... I use the slightly better
ones... with the end retainers. That way, once inserted... they
CAN'T slide out. Good, cause mine are mounted vertically in
several of my many HV supplies.
### You can still get em new... on Cooper Bussman's
website ,buried under HV fuses. The HVU series above is
sandfilled, u can also get em without the sand..... and a lower max
interupting current rating. The new ones all have ceramic bodies,
these surplus ones all have glass bodies.
### The 120mm long ones available in EU should also work. I'd
place any HV fuse BEFORE the glitch R, not after.... just in case
the glitch R comes apart... and touches the chassis/metal. I
also insert a 2nd HV fuse [in one leg only on a single phase xfmr]
between xfmr sec... and diode board.
later... Jim VE7RF
73 Frank DG1SBG
