[AMRadio] BC1-J Mod trans. is fine.

[Mike Dorworth]

My figures for the transformer 9500 Ohms Plate to Plate, Primary, 5128 Ohms
Secondary at 417 Ma Z Ratio 1.8526 step down.Mike K4XM (2450 Vct, 1800v
750va) for pair 833 up to 1650 watts sine wave output @ 3000 V CCS..
----- Original Message -----
From: Dan Hall <kj7fx at tdn.com>
To: <amradio at mailman.qth.net>
Sent: Wednesday, March 20, 2002 3:47 PM
Subject: Re: [AMRadio] BC1-J Mod trans. is fine.


> Ok:
> I have just successfully modulated into the dummy load with the
transformer
> hooked up right. Looked great with 100% modulation on the scope. Hey, not
my
> fault the Gates schematic had the wrong numbers on it and didn't look at
all
> like the transformer that was installed.  Well, ok. Yes it was. I should
> have verified the thing before I wired it up. Anywho, were getting closer
to
> being in business. Now the damn thing works fine into a dummy but the
> modulator oscillates when into the antenna. I still need to clean up the
> transmitter side of things. But there's hope.
>
> Dan
> ----- Original Message -----
> From: <KC4QLP at aol.com>
> To: <amradio at mailman.qth.net>
> Sent: Wednesday, March 20, 2002 12:38 PM
> Subject: Re: [AMRadio] Bad news on BC1-J Mod trans.
>
>
> > This transformer cost the station $995.00 3 years ago and had to be hand
> > built...it took 2 weeks to get it.Needless to say...the weight
difference
> > between the old mod transformer in the Raytheon RA 1000 and the new one
> from
> > Peter Dahl...hehehe....well lets just say I could easily hold the new
one
> > without getting a hernia. The only draw back is the new transformer
> "sings"
> > {the new one isnt encased in an oil filled box} --take note of the
> secondary--
> >
> > << GATES BC-1 MOD TRANSFORMER
> >  P/N 478-0410-000
> >  CORE) A-0525/ C-CORE         STYLE #) 09  HIPERSIL C-CORE
> >
> >  PR) 2450 VCT PP 833A'S
> >
> >  S1) 1800 VAC @ 750 VA ----< yes this secondary is used in the
transmitter
> >  S2) 80/110/155 VAC @ 8 VA--< however this one is not used...voltage and
> > current rating too low
> >
> >  DM) HT = 10.625 WT =  7.375 DT =  6.750 MD =  4.750 MW =  5.750
> >  PRICE)    $995.00 Plus S&H FOB El Paso, TX    WEIGHT)   49  LBS
> >
> >  73 de Bill, AB6MT
> >  billsmith at ispwest.com >>
> >
> >
> >
> > Bob Carter
> >  Operations/Engineering
> >
> >  WGAI-NewsRadio 560 AM Stereo .., WCXL 104.1 Beach 104..., WQDK 99.3
> > Q-Country..., WWOC 94.5 WaterCountry 94.5..., Ray Communications Radio
> > Network
> >
> >  Mid-Atlantic Engineering Services--providing radio stations with
> engineering
> > services in the middle eastern Atlantic area.
> > e-mail:MidAtlanticEngineeringService at yahoo.com
> > http://www.geocities.com/midatlanticengineeringservice
> >     Chief Engineer--WRCS-AM 970 Ahoskie NC
> >                              WBXB-FM 100.1 Edenton NC
> >                                WURB-FM 97.7 Windsor NC
> >
> > AM Stereo Radio list moderator-----
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> >
> >                   KC4QLP Amateur Radio
> >                      www.kc4qlp.cjb.net
> >
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