I have used those on robotics and digital projects and quite like
them. Before I'd put one in a radio though I would put one under a
load and see how RF noisy it is as those are switchers. Over all I
think I'd stick with a linear regulator unless low power consumption
during stand by was paramount.
KK6RPX
On 6/12/2017 8:43 AM, Geoff Lowe wrote:
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first off, thanks
to everyone in the Bitx community for their advice and input on
improving the design and functioning of the Bitx40.
Has anyone looked into replacing the 7805 with a Murata linear
supply like this one: ?
I've used this in a few other applications and it runs very cool,
even with 15+VDC input. It's a pin-for-pin replacement to the 7805
except the pins are in the reverse order.
The case I have places the VR and heat sink very close to the
metal side and I thought that if it gets hot or bumped the heat
sink will short to the case, something Ashar says is a no-no!
Replacing the VR with the linear unit should cut down on the heat
generated, plus a plastic film on the case by the heat sink will
prevent the short, without worrying about the heat dislodging the
plastic film.
Thanks.
