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On-air console identification

I believe the company is now Radio Systems.
The console was built in the early 80's.
Hope this helps.

Frank
 
frankberry said:
I believe the company is now Radio Systems.
The console was built in the early 80's.
Hope this helps.

Frank
Click to expand...


Correct, RS had them the last knew. Originally, I think these were made by UMCBeauCart.
 
Not sure of the name, I worked on one. It was the first slider board I used and the station I worked for bought around 86 or 87 I think. Sorry I could not be more helpful. It was a pretty nice board.
 
This board was made by Broadcast Audio Associates. It came out in the early 1980's. It was also marketed by Beau, the Beaucart people. The consoles were originally mfr'd by David Evans, who passed on maybe 15 years ago. LPB also manufactured them for a time as a Fidelipac product. LPB bought out BAA in 1989.
To my knowlege, Radio Systems never had anything to do with these boards (except perhaps sell them as a dealer at one time).

They were ahead of their time audio wise-they used National Semiconductor IC's that unfortunately are no longer available.
 
I have a similar Broadcast Audio console that was moved over from a NYC station at one of my weekend studio sites. I believe I may have the schematics and power supply details too. I can check on that but it may take me another week.
 
I have a technical manual for the Broadcast Audio Corp System 20 Console.
I also have info on the power supplies.

They use 2 power supplies, originally built as 24 volts at 3.6 amps but modified down to 18 volts each.
The 2 power supplies are made by Power One, part # HN24-3.6-AG. DigiKey has many in stock at about $73 each. Now the notes I have is that they are modified down to 18 volts from 24 volts by adding a 5K6 (5600) ohm resistor somewhere in the supply. Looking at it closer, there is a 5600 ohm small 1/2 watt or smaller resistor in parallel directly across a resistor. The component number of the resistor it is parallel across is hidden by the 2 large electrolytics above it, but it is the third resistor up in line from the negative (-) output terminals and under the filter caps and next to a metal trimpot marked R11 V ADJ. Also it is next to C4 a ceramic cap and just before R13 and U1.

You take two of these supplies to make + and - 18 volts.
A datasheet on the original 24 volt supply is here:
http://www.power-one.com/resources/products/datasheet/lin.pdf
A parts page link from a distributor is here:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=179-2347-ND

Funny thing is these listed for $73.10 back in July 1996 and are now $72.83 each in 2008.

I have a 23 page Tech Manual for the console which specs out line diagrams, instructions and things like jumper settings plus installation, operation & maintenance sections.

Email me your email address to <ontheair247(AT)verizon(DOT)net and I will scan off a copy to you or anyone else needing same.

This would probably be a good addition to one of the broadcast manual archives somewhere too.

George Kowal CBNT
WRKL - AM
 
Just noticed that in addition to the + and - 18 V this console also needs +12 volts.
The manual states "set 12 v supply to 12.5 v as measured at the power supply barrier strip. Set 18v supplies to +- 0.1 v."

Looks like the +12.5 runs the indicator lamps and internal relays such as tally, remote start/stops, etc.

Indicator bulbs are #330 T1.75 for the mixer on/off and #73 for the VU meter lamps, both of which are 14 volt bulbs.

George Kowal CBNT
WRKL-AM
 
More details, I just found an additional addendum book put together by David Evans back in March of 1987.
Lists things like spare part numbers, P&G fader maintenance details, details on turning turntables (lol) on/off through the console, etc.

I'll scan a copy of that along the rest.

I also checked under the console and the 3 power supplies are in one rack mountable chassis, fused at 2 amps for the 12 volts and 1 amp each for the +18 and -18 volts. That should give you an idea of the current draw.

While I'm at it, I would bet Bob Tarsio, founder of BDI, Broadcast Devices Inc would be a wealth of knowledge on this console due both to his design experience and the fact that he was once CE of the station this particular one came from.

I will say that since we are still using daily and/or reinstalling these consoles probably over 25 years since they came out, that's a good testament to basic solid state design. I haven't had to replace more than one push button switch mechanism in the last 5 years while the rest of it keeps on running 24/7.

George Kowal CBNT
WRKL-AM
 
Thanks George for all your assistance on this one. Without this I'd really be in the dark.

I'll catch up with you on the email.

How would I go about finding Bob Tarsio?
 
Just joined Radio Info boards so forgive the late entry.

I was with Fidelipac when we purchased Broadcast Audio out of Rancho Cordova, CA in 1989.
Built the consoles till 1996 when parts started getting rare.
I have what is left of the Series IV and Series VI Manuals in my parting package when I left LPB.
Don't Ask.
I have a great deal of data in either hard copy or digital formats on these consoles.
Probably easier to put them on the wwwsandiesusa.com website.
It's on my list of things to do.

If you need any individual prints or info, give me a call.

Dave Strode
SANDIES
215 547-2570
 
Cheers Dave!

I'll keep an eye on your site for the upcoming information and data.

George has given me quite a bit of info already for this desk, which is great, but as with most things, every little bit of info helps.
 
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