[BC] question for you engineers

[Gary Glaenzer]

 24V4's ?


----- Original Message ----- 
From: "Bob Tarsio" <Bob at Broadcast-Devices.com>
To: "'Broadcasters' Mailing List'" <broadcast at radiolists.net>
Sent: Tuesday, January 01, 2008 10:54 AM
Subject: RE: [BC] question for you engineers


> Donna:
>
> I suspect it was done much like it can still be done today by taking the
> caller output from one side of the hybrid in a standard telephone and
> feeding it to console input. Back then it would have likely been
transformer
> isolated and fed to a console input. The idea of two way communication
> through a phone could have been accomplished as well at that point as
there
> were hybrid transformers available to divide the caller and sender audio
> into discrete paths. The isolation wasn't as good as can be done today
with
> digital techniques but it probably worked well enough.
>
> Bob Tarsio
> President
>
> www.Broadcast-Devices.com
>
>
>
> -----Original Message-----
> From: broadcast-bounces at radiolists.net
> [mailto:broadcast-bounces at radiolists.net] On Behalf Of Donna Halper
> Sent: Monday, December 31, 2007 21:47
> To: Broadcasters' Mailing List
> 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.
>
> _______________________________________________
>
> The BROADCAST [BC] list is sponsored by SystemsStore On-Line Sales
> Cable-Connectors-Blocks-Racks-Test Gear-Tools-Lots More + Now Barix too!
> www.SystemsStore.com       Tel: 407-656-3719    Sales at SystemsStore.com
>
>
>
> _______________________________________________
>
> The BROADCAST [BC] list is sponsored by SystemsStore On-Line Sales
> Cable-Connectors-Blocks-Racks-Test Gear-Tools-Lots More + Now Barix too!
> www.SystemsStore.com       Tel: 407-656-3719    Sales at SystemsStore.com
>
>
>