[NJARC] Star Roamer (was Reflexed Superhet?)

[John Ruccolo]

Al,

Yes, I cracked open Radiotron 4th Ed. and read all
about the reflexed supers. Very interesting; ya gotta
tip your cap to those Aussies. One of the charms of
that book is having to deal with the British-isms like
"play-through."

The Osterman Comm. Rcvr. book describes the Knight
Star Roamer as "a very modest performer." Nuff said.

Regards,

John

--- Al Klase <al at ar88.net> wrote:

> Visit our web site - See http://www.njarc.org
> _______________________________________________
> Nick,
> 
> Looks to me like they opted for an extra stage of
> audio, using a 12AX7 
> dual triode in place of something like a 12AV6. 
> This left them needing 
> a diode for the detector.  Being a late design
> solid-state diodes were 
> now in vogue.  They used a second one for a noise
> limiter as well.
> 
> Al
> 
> NICHOLAS SENKER wrote:
> > Visit our web site - See http://www.njarc.org
> > _______________________________________________
> > Regarding the Star Roamer, I was responding to
> your question of why the crystal or diode detector
> wasn't used more often in AA 5s to eliminate a tube
> and thus cut costs.  I don't intend to use the Star
> Roamer in the DX contest.  I agree it can't be taken
> seriously as a communication receiver, but it is
> 'cute' and interesting as a first intro into short
> wave.
> > Back to the AA 5s, it seems the 12AV6 or
> comparable tube served several purposes; detector,
> AVC, and audio amp thus merely substituting a  diode
> would still present problems.  I am not really
> familiar with a reflex design so maybe I'm not
> really appreciating the point you were trying to
> make.
> > Nick Senker
> >
> > ----- Original Message -----
> > From: John Ruccolo <jr6v6gt at yahoo.com>
> > To: New Jersey Antique Radio Club
> <njarc at mailman.qth.net>
> > Sent: Mon, 14 Jan 2008 14:18:58 -0500 (EST)
> > Subject: Re: [NJARC] Star Roamer (was Reflexed
> Superhet?)
> >
> > Visit our web site - See http://www.njarc.org
> > _______________________________________________
> > Hi Nick,
> >
> > I don't think the Star Roamer was a reflexed
> super.
> > But I think it did use an oscillating IF stage as
> a
> > quick-and-dirty BFO (for copying Morse Code) like
> the
> > later S-38's and lots of other entry-level
> > communications receiver wannabes did.
> >
> > If you're thinking about using it in the DX
> contest, I
> > have one word of friendly advice: DON'T. Anything
> > without an RF stage in categories D and E puts you
> at
> > a serious disadvantage. I've already talked myself
> out
> > of using a similar radio, a Heath GR-64.
> >
> > Someone in the club once described the Star Roamer
> as
> > "the cheesiest radio ever to have an S-meter." But
> the
> > Star Roamer *is* a cute little sucker, though. ;-)
> >
> >
> > JR
> >
> >
> > --- Al Klase <al at ar88.net> wrote:
> >
> >   
> >> Visit our web site - See http://www.njarc.org
> >> _______________________________________________
> >> NICHOLAS SENKER wrote:
> >>
> >> My Knight 'Star Roamer' uses a diode detector. 
> Does
> >> that qualify as a producion radio?
> >> Nick Senker
> >>
> >>
> >> Hi Nick,
> >>
> >> I'm not sure in what context you ask this
> question.
> >> For the purposes of the DX contest, let's
> consider
> >> it category D.  I checked both the 1969 Allied
> >> Catalog and the Star Roamer manual
> >> http://bama.edebris.com/manuals/knight/str-rmr/
> >> Neither makes any claims that this is a
> >> "communications receiver."  I feel this is fair
> for
> >> this and other similar simple radios like
> >> Hallicrafters S-38, S-120, etc.  I don't think
> >> anyone with an RCA 15K or such is going to feel
> >> threatened.
> >>
> >> RECEIVER CATEGORIES:
> >> A - Crystal radios
> >> B - Primitive tube receivers (homebrew also) -1
> to 2
> >> tubes plus power supply
> >> C - 1920's Battery sets (homebrew also)
> -batteries
> >> or modern power supply is OK
> >> D – Other tube radios sold for home
> entertainment.
> >> E – Amateur, commercial, and military tube-type
> >> communications receivers.
> >> F – Transistor radios introduced before 1970.
> >>
> >> -- 
> >> Al Klase – N3FRQ
> >> Flemington, NJ
> >> http://www.skywaves.ar88.net/
> >>
> >> _______________________________________________
> >> NJARC mailing list
> >> NJARC at mailman.qth.net
> >> http://mailman.qth.net/mailman/listinfo/njarc
> >>
> >>     
> >
> >
> >
> >      
>
____________________________________________________________________________________
> > Be a better friend, newshound, and 
> > know-it-all with Yahoo! Mobile.  Try it now. 
>
http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ
> 
> >
> > _______________________________________________
> > NJARC mailing list
> > NJARC at mailman.qth.net
> > http://mailman.qth.net/mailman/listinfo/njarc
> >
> >
> > _______________________________________________
> > NJARC mailing list
> > NJARC at mailman.qth.net
> > http://mailman.qth.net/mailman/listinfo/njarc
> >
> >
> >   
> 
> -- 
> Al Klase - N3FRQ 
> Flemington, NJ 
> http://www.skywaves.ar88.net/
> 
> _______________________________________________
> NJARC mailing list
> NJARC at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/njarc
> 



      ____________________________________________________________________________________
Be a better friend, newshound, and 
know-it-all with Yahoo! Mobile.  Try it now.  http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ