[ARC5] Q5'er w/converter - mounting, etc

[Dennis Monticelli]

Hi Ian,

The rear porch is the obvious place.  I have a converter mounted on
the rear of mine and no power supply, but there is room for both on
the same platform.  A box with three miniature banana jacks mounted on
the bottom will allow the box to plug directly into the three dyno
power pins provided you drill four relief holes for the dyno pins to
poke in.  There are various schemes for adding mechanical stability
either directly via those four pins or via a simple external support
bracket.

Probably the simplest and most compact way to build a power supply
would be to take a common 1A 24 or 25.2VAC transformer and make DC
from a half-wave voltage doubler (2 diodes and 2 caps).  This would
give you roughly 75VDC for B+ and 24 or 25VAC for the filaments.  A
BC-453 with decent bypass caps shouldn't need more than 15mA at this
voltage.  The converter would add a few more mA, but it te total drain
should still be under 20mA.

Have fun collecting ideas for your project.

Denny AE6C

On 4/14/07, Ian Wilson <ianmwilson at earthlink.net> wrote:
> I would like to put a BC-453, converter, and power supply together in some
> sort of assembly that looks moderately OK.
>
> I have a salvaged BC-454 chassis that I used for an earlier version of the
> converter, with octal tubes. This could be mounted side-by-side with the
> BC453 in a 2-receiver ARC-5 rack.
>
> Another alternative would be a conventional chassis, perhaps with the power
> supply hidden underneath, and the converter on top for easy xtal switching.
>
> If anyone has pictures, I'd be interested to see how the different schemes
> look (I do not have good spatial visualization skills).
>
> Would also be interested in trading for a 2-receiver rack.
>
> 73, ian K3IMW
>
>
>
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