[BC] Trapezoidal modulation display

[Robert Meuser]

Then there was the BC5HA with a full 10KW modulator with its own power 
supply modulating a 5 KW RF chain. Remember in those days it was illegal 
for a class III station to install greater than a 5 KW box.

R


Phil Alexander wrote:

>It could be done on most high level plate modulated boxes
>of the day. AFAIK Gates was the only manufacturer that
>did it as a standard option. Most of the 5's were based
>on the 10's with smaller iron etc. A PA built around a
>pair of 3X2500F3 or similar was common. Properly driven,
>175 or 200% + modulation was not that hard if the PS was
>adequate.
>
>Phil Alexander, CSRE, AMD
>Broadcast Engineering Services and Technology 
>(a Div. of Advanced Parts Corporation) 
>Ph. (317) 335-2065   FAX (317) 335-9037
>
>
>On 19 Feb 2006 at 10:17, Steve Michaels Productions wrote:
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>>It was an RCA transmitter at WEAM.
>>
>>-----Original Message-----
>>From: broadcast-bounces at radiolists.net
>>[mailto:broadcast-bounces at radiolists.net] On Behalf Of Phil Alexander
>>Sent: Saturday, February 18, 2006 10:44 AM
>>To: Broadcasters' Mailing List
>>Subject: Re: [BC] Trapezoidal modulation display (was "Re: [BC]Inovonics
>>model 520")
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>>That was a "special" mod. (available from the factory for those who knew) on
>>the Gates BC5P2 and probably on the BC5H when it was introduced. Since the
>>BC5P/H and BC10P/H cabinets were identical, it was a matter using the 10P/H
>>iron and PS in the 5. A really easy mod. from the factory standpoint. I 
>>believe this was the reason for the 125% rule. Too many complaints about
>>"loud" competitors from the whiners who didn't want to buy one. <g>
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