Re: no dc/dc converters

john larkin <jl@glen--canyon.com> wrote:

On Thu, 12 Jun 2025 22:04:54 +1000, Chris Jones
<lugnut808@spam.yahoo.com> wrote:
 

On 11/06/2025 1:20 pm, john larkin wrote:

On Tue, 10 Jun 2025 17:30:18 +0100, liz@poppyrecords.invalid.invalid
(Liz Tuddenham) wrote:
 

john larkin <jl@glen--canyon.com> wrote:
>

On Tue, 10 Jun 2025 10:15:30 -0400, legg <legg@nospam.magma.ca> wrote:
>

On Mon, 09 Jun 2025 10:06:16 -0700, john larkin <jl@glen--canyon.com>
wrote:
>

There seems to be a run on dc/dc converters
>
https://www.digikey.com/en/products/filter/dc-dc-converters/922?s=N
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>
some sort of tariff issue, looks like.
>

>
In stock - 1 in 3
>
exclude tariffed products 1 in 5. (new selection category?)
>
RL

>
Worst case, I'll have to make my own.

>
Buy shares in the manufacture of dynamotors - they are bound to become
popular again.

 
Diesel powered amplidynes could drive the big woofers at rock
concerts. Rip peoples' clothes off.

>
No, forget the amplidynes and just mechanically couple the engine to a
rotary woofer:
>
https://en.wikipedia.org/wiki/Rotary_woofer
>
Even better, fit a fast servo to modulate the pitch of the bypass fan
blades on a turbofan jet engine.
>
"Regular concert goers judged that the best sound balance was usually to
be heard from within large concrete bunkers some thirty-seven miles away
from the stage, whilst the musicians themselves played their instruments
by remote control from within a heavily insulated spaceship which stayed
in orbit around the planet - or, more frequently, around a completely
different planet. "

 
How about a big tank of very high pressure air, like 5000 PSI maybe,
and a fast servo valve? That would be loud.

It's been done.  Look up Auxetophone and Stentorphone.  Horace Short.
and Charles A. Parsons (of turbine fame) were among several inventors of
these compressed air amplifiers.  Auguste Stroh is anothr interestin
audio engineer.

--
~ Liz Tuddenham ~
(Remove the ".invalid"s and add ".co.uk" to reply)
www.poppyrecords.co.uk