[AMRadio] Broadcast transmitter


crawfish crawfish at surfmore.net
Sun Apr 23 16:31:31 EDT 2006


The BC-339 uses a pair of 833A's which are 1 kW+ OUTPUT. It is designed for
CW/FSK. I will have to build a modulator for it, probably using a pair of
833A's.W4AEE gave me info on the one he built.
                            Joe W4AAB
----- Original Message -----
From: "W5OMR/Geoff" <w5omr at satx.rr.com>
To: "Discussion of AM Radio" <amradio at mailman.qth.net>
Sent: Sunday, April 23, 2006 9:38 AM
Subject: Re: [AMRadio] Broadcast transmitter


> crawfish wrote:
>
> >There is an article in Electric Radio about modifying 3 phase systems to
> >single phase. I will see if I can find it. I am going to run into the
same
> >problem with the BC-339. I might have to build up a single phase supply
and
> >run it at a lower level, since 1 kW out on AM will not be legal.
> >                                    Joe W4AAB
> >
>
> Sure it would.
>
> 1.5kW PEP is the limit.  You could effectivly fun 1500w of phase
> modulation, quiet the noise, and have the other station(s) slope detect
> and be legal.
>
> The rule is 1.5kW PEP OUTPUT.
>
> 1kW DC input, with the plate leads reversed on the modulator, would just
> about be legal, for that matter.
>
> --
> 73 = Best Regards,
> -Geoff/W5OMR
>
>
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