>
> The debate about rectifier diodes in recent days has focused attention
> on HV power supplies. This begs the question as to why amplifier
> manufacturers and hams who build their own have not turned their
> attention to designing and building HV switching supplies.
> Components for this type of supply are available. A switching supply has
> much less weight than its linear counterpart leading to a more compact
> amplifier design. It also provides excellent regulation.
> The February 1991 issue of QEX included an article by Timothy P.
> Hullick, PhD, W9QQ describes a 2KV, 1.5A switching unit weighing but 8
> pounds. I also note that Astron has recently announced the availability
> of a whole series of switching supplies having current capabilities of
> up to 30 amps. (albiet these supplies are low voltage 13.8V units but
> are price competitive with linear supplies)
> Does anyone out there have any thoughts on the subject?
Hi Court,
The reasons why? Six I can think of....
1.) COST
2.) Reliability
3.) COST
4.) Noise and RFI
5.) Cost
6.) Ease of service
With solid state PA's (they're coming faster than you might think
now) switchers might be useful, but not for vacuum tube PA's.
73, Tom W8JI
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