[TechAssist] Re: Rca CTC-169CL5 lightbulb placement?
- From: "Mitchs Electronics" <Mitchstv@xxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 20 Dec 2002 09:45:05 -0600
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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