Re: Flyback Troubleshooting help

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> 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> 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> 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 17:11:09 2011