[TechAssist] Re: Rca CTC-169CL5 lightbulb placement?
- From: "Barry Thompson" <barrystv@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 20 Dec 2002 11:10:59 -0500
Hi Rick: You should get a pulse at the base for about 2 seconds when you
power up. Try this. Cut trace at pin 1 and apply 13 volts at pin one with a
amp meter in your 13 volt suppy,and power up and you should get around 35
ma. If you hear a crack at the second and it shuts down your flyback is
bad.Barry barrystv@xxxxxxx
Barrys TV
613 224 3406
Ottawa.Canada.
----- Original Message -----
From: "Mitchs Electronics" <Mitchstv@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, December 20, 2002 10:45 AM
Subject: [TechAssist] Re: Rca CTC-169CL5 lightbulb placement?
>
> Barry, don't see anyway to defeat reset. But supply at no load is 139
volts
> and with the 60 watt bulb
> at aprox 19 ohms drops the supply to 121 volts. So its supplying just over
1
> amp of current. Sam's says whole set uses 1.4 amp so that's in the ball
park
> I guess. Max saturation on the 1885 is 5 amp while Vbe sat is 1.5 so don't
> think the currents killing it. Base waveform is 12 vp-p and at horz rate.
> Think I will try a new flyback.
> Rick Mitchell
> Mitch's Electronics Ser.Co.
> Mitchstv@xxxxxxxxxx
> 3935 south 20th
> Lincoln, Nebraska 68502
> ----- Original Message -----
> From: "Barry Thompson" <barrystv@xxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, December 20, 2002 7:53 AM
> Subject: [TechAssist] Re: Rca CTC-169CL5 lightbulb placement?
>
>
> >
> > My opinion in which I mentioned before, all the light bulb will do when
> > hooked up from collector to ground is put a load on the B+ and check the
> > power supply. It will not check the horizontal output circuits. Putting
a
> > light bulb in series with the the ac line will work if one can find a
way
> to
> > disable the reset circuit on a CTC 169. It can be done on a
CTC156,157,and
> a
> > 167. Barry
> > barrystv@xxxxxxx
> > Barrys TV
> > 613 224 3406
> > Ottawa.Canada.
> > ----- Original Message -----
> > From: "Pete" <wpt19@xxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Friday, December 20, 2002 7:24 AM
> > Subject: [TechAssist] Re: Rca CTC-169CL5 lightbulb placement?
> >
> >
> > >
> > >
> > > Hook up bulb from collector to ground of the HOT?.... can you please
> > > describe the purpose of this test?
> > >
> > >
> > > Pete
> > > Perdomo TV, Inc.
> > > Miami Fla.
> > > wpt19@xxxxxxxxx
> > >
> > > techassist-bounce@xxxxxxxxxxxxx From: DAMON101@xxxxxxxxxxxxxx (Damon)
> > > Date: Thu, Dec 19, 2002, 9:54pm To: techassist@xxxxxxxxxxxxx Subject:
> > > [TechAssist] Re: Rca CTC-169CL5 lightbulb placement? Reply=A0to:
> > > techassist@xxxxxxxxxxxxx
> > >
> > > Remove HOT, hook up bulb from collector to ground
> > >
> > > ----- Original Message -----
> > > From: "Mitchs Electronics" <Mitchstv@xxxxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Thursday, December 19, 2002 10:32 AM
> > > Subject: [TechAssist] Rca CTC-169CL5 lightbulb placement?
> > >
> > > Guys, cant find my Idiot sheet on where to place the 60 watt lightbulb
> > > in HOT stage. was it
> > > A. In series Emitter to ground with the 1885 in circuit, Or
> > > B. Remove the 1885 and series it collector to emitter? Hate to waist
> > > another 1885 even at $3.00.
> > > Thanks
> > >
> > > Rick Mitchell
> > > Mitch's Electronics Ser.Co.
> > > Mitchstv@xxxxxxxxxx
> > > 3935 south 20th
> > > Lincoln, Nebraska 68502
> > >
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