[ARC5] BC453 on 24V

[Ian Wilson]

Some of those receivers used the 28D7 dual beam power tube. This is quoted
as 175mW audio output in push-pull with 28V supply. That reminds me, I have
some of these "somewhere"...

73, ian K3IMW

On Tue, Dec 10, 2019 at 4:24 PM Robert Eleazer <releazer at earthlink.net>
wrote:

> I used to power up the filaments on my R-11A and reduce the B+ until it
> quit.  I found I could get down to just a little before I got to 28VDC and
> still be able to hear a signal.  And with the basic R-11A there was no
> volume control or gain control.  You just plugged in a headset and listened.
>
> Note that the various BC-1206 receivers all work on 28VDC B+ and filament
> voltage, as does the R-392, and numerous tube type marker beacon receivers,
> including the BC-357, BC-1033, and R-666.
>
> WAyne
> WB5WSV
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