[HBR] HBR Chassis Kit continued or not : )

[Ian Wilson]

Seen several references to the HRO-500 being a Wadley loop.
So I must be misinterpreting the block diagram (the 'synthesizer'
does mention generating 60 frequencies from one reference, so
perhaps it's all hidden in there somewhere).

73, ian K3IMW


On Mon, Apr 20, 2015 at 12:38 PM, Ian Wilson <ianmwilson73 at gmail.com> wrote:

> I took a quick look at the HRO-500. I don't think this is a Wadley loop.
> It's double conversion (apart from the LF bands, which upconvert to
> 26.<something>MHz). The synthesizer looks like a real bear. Would
> NOT like to try to restore one of these!
>
> 73, ian K3IMW
>
> On Mon, Apr 20, 2015 at 9:13 AM, Tom Dailey <radio at daileyservices.com>
> wrote:
>
>> Recently, at a hamfest, I purchased a home-brew Wadley Loop receiver,
>> built by a fellow (here in Colorado).  With 4 tubes, it's astoundingly
>> sensitive, STABLE, and relatively selective.  Considering that some of the
>> RACAL high-end receivers (and the National HRO-500) used this scheme, it's
>> pretty well proven.  As a friend once put it "The Ancients weren't stupid -
>> they were just ancient!"
>> Tom - W0EAJ
>>
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