[HBR] Blog post about HBR receivers

[Peter Bertini]

Me too. Many glowing reports, but very little substantiated lab data to
prove the claims. A lot of people swear by them. I'd like to see some
blocking and IMD performance lab tests comparisions. And there is very
little practical info regarding correct LO levels for the Pullen as well.

Pete

On Mon, Jun 14, 2010 at 10:19 PM, Kees & Sandy <windy10605 at juno.com> wrote:

> I would be very interested in Pullen Mixer results. I've heard it discussed
> and discussed but no data thus far.
> 73 Kees K5BCQ
>
> ---------- Original Message ----------
> From: Peter Bertini <radioconnection at gmail.com>
> To: HBR Receiver List <hbr at mailman.qth.net>
> Subject: Re: [HBR] Blog post about HBR receivers
>  Date: Mon, 14 Jun 2010 22:11:43 -0400
>
> I subscribe to the belief that the HBRs were intended to be a work in
> progress. For my own effort I'll be adding a few sets of the half-lattice
> xtal filters (1682kHz) recovered from three HR-10 Heathkit donors for a
> six-pole filter at the first IF.  I'm also considering a
> 6GM6 RFA,  6ES8 Pullen mixer, and 6EJ7s in the IF stages.  It would be
> interesting to take the designs several years into the future, when still
> retaining most of the mechanical details outlined in the original series.
> My only hangup on getting started on a firm design was use of the second LO
> harmonic for the first mixer on the higher hambands; I'm not sure if I'll
> have good LO injection levels for the Pullen mixer,  or perhaps a balanced
> mixer.
>
> Pete
> Pete
>
> On Mon, Jun 14, 2010 at 10:03 PM, <LeeCraner at aol.com> wrote:
>
> > Since my HBR-16 was one of the receivers featured in the article
> referenced
> >  in the blog, I guess I should weigh in here.
> >
> > HBR's are dated, they are 50 year old designs.  But that is the point
> > isn't it?  We subscribe to this reflector because we enjoy owning,
> >  operating,
> > restoring, dream of building, etc. something from the past.  And  when we
> > operate those dated receivers, not only have the pride of construction
> >  that
> > was previously and correctly mentioned, we have a receiver that is still
> > competitive to modern designs.  Sure my HBR-16 drifts a bit.  So do  all
> > non
> > synthesized receivers, tubed or solid state.  It hears just as well  as
> my
> > Drake R-7A, and for casual listening, I prefer the wider audio of the
>  HBR.
> >
> > To be fair to the author of the blog, it would appear that he isn't just
> an
> >  appliance operator; in another post he made on his site, he has
> > constructed  at least one, albeit solid state, receiver.  But he misses
> the
> > point on
> > the  worth of the HBR design.  Ted Crosby's goal was to design a receiver
> > that any Tom, Dick or Harry (his words) could duplicate with modest means
> > and
> > ability, and compete with the best commercial receivers of the  day.  He
> > succeeded quite admirably, I would say.  And we who  subscribe to this
> > reflector continue to enjoy his efforts.
> >
> > 73
> > Lee WB6SSW
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