Re: Flyback Troubleshooting help

  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 16:59:05 2011