[TVI-RFI-EMI] Re: GB> Re: [BOATANCHORS-TEMPE] Solid state 5R4's

[mikea]

Well, paraffin _does_ melt at boatanchor temperatures; a silicone potting
compound with equivalent-or-better HV characteristics probably would be
better.

It could be very embarrassing to find that your HV rectifier had piddled
all over your chassis -- particularly if it were mounted in some position
other than base-down. It could be _extremely_ embarrassing to have all the
goo run out if you were running high enough voltages that you _needed_ the
goo to keep all the electrons where you wanted them.

You might even lose some of the Magic Smoke!

On Wed, Dec 06, 2006 at 11:55:24AM -0500, kd4e wrote:
> Neat!  Would that be a potential solution for the use
> of some other solid state devices?

> Does the paraffin have a limited useful life in this
> application?

> > If the tube base is potted (filled) with paraffin surrounding all the
> > diodes inside. 73 de Bob, N3LKL 
> > 
> >> Octal tube based solid state 5R4 tube replacement. 
> >> Type 1N1239 2800PIV.
> > 
> > Anyone know if these, or some other diode-based rectifier substitutes,
> > are roughly as EMP-resistant as equivalent tubes?

-- 
Mike Andrews, W5EGO
mikea at mikea.ath.cx
Tired old sysadmin