[HBR] HBR progress

[Bill Cromwell]

On Mon, 2012-04-02 at 16:48 -0500, Chris Howard w0ep wrote:
> I'm making progress on acquiring parts for my HBR project.
> 
----snip----
> 
> I have transformer, rectifier and two chokes for the
> power supply.  Some of my power supply parts are overkill
> in size (8 hry 250 ma) but what's in the junkbox
> is much cheaper than what's in a catalog. With the hefty
> iron, I'm thinking it may be smart to use a separate
> power supply chassis.  If I ever get smaller parts
> I can build one on board.
> 
> I have 85 kHz IF transformers. I think I'm doing
> pretty well for tubes.
> 
----snip some more---

> Chris
> w0ep
> 
> ______________________________________________________________

Hi Chris,

I have gone to building/using/re-using separate power supplies (and
audio amps). It keeps some of the heat out of the radio. A potential
source of hum is removed from the radio at the far end of the power
cable under the bench. The expense and effort of producing a power
supply for each and every unit is eliminated.

My power supplies are also overbuilt by intent. The one I built for
operating a single 6146 transmitter can easily run more than two. In
fact, it melted down a 6146 with no sign of strain at all when the bias
supply wire broke. Don't spend too much time worrying about your
"overkill" power supply being outside your receiver.

73,

Bill  KU8H