Re: Flyback Troubleshooting help

  Ah... okay, I will build up a 555 oscillator tonight.... Im going to
have to go pick up my kids now.

I put the flyback back together and the ring looks pretty much crappily
the same. Will report more later tonight when I get a good oscillator.

thanks for everyones help.. this is intriguing.

jess

On 1/17/2011 3:11 PM, Rodger Boots wrote:
> Well, that makes no sense at all. Increase the capacitor to 100 uF.
> Your generator output stage might not be able to handle this job.
>
> Or just buffer your generator output with a 555 timer IC (generator
> drives pins 2 & 6, pin 3 is output). That will get you 300 mA of drive.
>
>
> On Mon, Jan 17, 2011 at 3:57 PM, Jess Askey <jess@askey.org
> <mailto:jess@askey.org>> wrote:
>
> Here is the main primary being rung @ 15KHz with a .047uf cap in
> series with it, there are no other windings on the core with it...
> but I can throw more on if needed.
>
> http://gamearchive.askey.org/Video_Games/Manufacturers/Atari/monitors/amplifone/raster/images/main_primary_ring_no_secondaries.jpg
>
> I thought that Raster flybacks where supposed to have spacers
> between the cores? This one doesn't have any.
>
> jess
>
>
>
> On 1/17/2011 2:35 PM, Rodger Boots wrote:
>> Just grab a capacitor (.1 to 1 uF or so) and put it in series
>> with the generator output. You just need to get rid of the DC
>> component of the signal (transformers get weird around DC).
>>
>>
>> On Mon, Jan 17, 2011 at 3:19 PM, Jess Askey <jess@askey.org
>> <mailto:jess@askey.org>> wrote:
>>
>> My generator doesn't have a DC offset, I will have to build
>> one. I just have a waveform generator IC that I breadboarded
>> up really quick... I will see if I can get a waveform
>> generator locally that has that feature.
>>
>>
>> On 1/17/2011 2:16 PM, Rodger Boots wrote:
>>> Does your generator have a knob marked "DC offset"? If so,
>>> set it for a -4 to +4 volt square wave. Using 0 to +8 volts
>>> isn't going to give you useful readings.
>>>
>>>
>>> On Mon, Jan 17, 2011 at 2:19 PM, Jess Askey <jess@askey.org
>>> <mailto:jess@askey.org>> wrote:
>>>
>>> Okay, I put the standalone LOPT onto my square wave
>>> generator (unfortunately my generator can only supply
>>> 30ma) so Im not sure that is enough.
>>>
>>> Here is the signal before attaching the LOPT.... 15KHz 9vP-P
>>>
>>> http://gamearchive.askey.org/Video_Games/Manufacturers/Atari/monitors/amplifone/raster/images/generator_output_15k.jpg
>>>
>>> Here is the primary with that signal attached...
>>> secondaries are exactly the same waveform, yet in
>>> different ratios (and those ratios are not correct)
>>>
>>> http://gamearchive.askey.org/Video_Games/Manufacturers/Atari/monitors/amplifone/raster/images/lopt_ringing_15k.jpg
>>>
>>> Doesn't look right.
>>>
>>> When I read a DC voltage on the Anode cap, I have
>>> 2.2VDC, pretty low. :-(
>>>
>>
>

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Received on Mon Jan 17 17:25:29 2011