[BC] processing way back when

Jim Tonne tonne
Tue Dec 19 22:15:25 CST 2006


Mark:

The "DSB" etc unit I referred to used miniature tubes.
Were there two versions of this thing?  Perhaps it was
a still different manufacturer.  Perhaps getting too late!

- JimT



----- Original Message ----- 
From: "Mark Humphrey" <mark3xy at gmail.com>
To: "Broadcasters' Mailing List" <broadcast at radiolists.net>
Sent: Tuesday, December 19, 2006 11:04 PM
Subject: Re: [BC] processing way back when


> On 12/19/06, Mark Durenberger <Mark4 at durenberger.com> wrote:
>> Bob, the GE you're talking about was actually the second-generation.  The
>> first generation used a lattice-network delay followed by an infinite:1
>> limiter; 12 db max limiting IIRC.  20+ tubes; powered by a regulated 
>> bipolar
>> 350 volts or so!
>>
>
> A schematic of the BA-5A is posted here; the lattice network is
> between the two interstage transformers.  I count 14 tubes, but this
> print doesn't show the power supply, which had rectifiers and probably
> a VR tube or series regulator:
>
> http://www.waltzingbear.com/Schematics/Misc/GE_BA_5.htm
>
> Mark
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