[BC] question for you engineers

[Gary Glaenzer]

As Mark says, the network probably had a pair of loops from telco CO to
studio, bridged across T and R paths

back in those days, one could actually get the phone company to co-operate
in such matters !

Gary


----- Original Message ----- 
From: "Mark Durenberger" <Mark4 at durenberger.com>
To: "Broadcasters' Mailing List" <broadcast at radiolists.net>
Sent: Monday, December 31, 2007 10:05 PM
Subject: Re: [BC] question for you engineers


> If it was exactly as you described it, the network probably had program
> lines from the various cities to New York.
>
> If done by telephone, it could have been done two ways:
>
> 1)  Someone with the smarts could couple directly from the phone
'receiver'
> and the 'mouthpiece'.  Isolation would have been poor in those pre-hybrid
> days and it wouldn't have sounded very good.
>
> 2)  If it WAS via telephone, it's possible the network had a
bi-directional
> path to the phone company.  When a phone call leaves the local exchange
for
> other exchanges, it's split into separate transmit and receive paths.  It
> would have been a fairly simple step to interface these two paths to the
> broadcast chain; all it would take is loops to/from the telephone
exchange.
>
> Mark Durenberger, CPBE
>
>
> ----- Original Message ----- 
> From: "Donna Halper" <dlh at donnahalper.com>
> To: "Broadcasters' Mailing List" <broadcast at radiolists.net>
> Sent: Monday, December 31, 2007 8:46 PM
> Subject: [BC] question for you engineers
>
>
> > So I'm working on my book, as you know, and here is something I don't
> > entirely understand.  In the 1920s, putting a caller on the air was
> > impossible for several reasons (including the government forbidding
> > personal communication-- or "point to point" communication by commerical
> > radio stations), and long distance phone service was still not available
> > in many cities-- plus it cost a small fortune.
> >
> > Sometime in the late 1930s, "America's Town Meeting of the Air" began
> > putting listeners on the air from distant locations.  How was this
done-- 
> > at first I guessed maybe phone service was good enough now so that they
> > could phone in.  But I also know that listening to this show was a group
> > activity in many cities. People gathered at one of the many locations
> > where the show was broadcast, and they all listened together.  There was
> > evidently a point in the show, after the guest speakers had had given
> > their talks, when listeners with questions were asked to step up to the
> > mike.  At the Town Hall in NY, I understand how the audience questions
got
> > on the air.  But how would the questions from other cities have been
> > broadcast as part of a live program?  This is circa 1937-8 or so.
> >
> > Sorry if this is a dumb question, but I don't know the history of
> > technology as well as I know the history of the programs and the people
> > who did them.
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