Re: Weird distorted shapes

I rearranged all of my boards and wiring harness to make sure nothing was
to close together but no change. The only other obvious power issue I can
see is that I only have 2 prong power outlets in my shed, so I'm not
getting a proper ground. Also I have fluorescent strips in the shed running
off the same circuit, do you think they would cause an issue?
On Mar 3, 2014 8:04 PM, "Joel Griffin Dodd" <griffindodd@gmail.com> wrote:

> I have a dual channel scope but I'm very green with it. Should I just be
> looking at the XY output the way I would get a picture on the scope or use
> it in a different way.
> On Mar 3, 2014 6:52 PM, "Jimmy Ipock" <jipock@gmail.com> wrote:
>
>> A dual channel oscilloscope might be useful here. It would show noise in
>> the x and y signals.
>> On Mar 3, 2014 8:31 PM, "Joel Griffin Dodd" <griffindodd@gmail.com>
>> wrote:
>>
>>> We've already tried the non inductive resistors but the problem remains.
>>> Anything else? Someone mentioned AC leakage into the XY amplifiers although
>>> the distorted shapes are stable, they don't flicker.
>>> On Mar 3, 2014 4:24 PM, "Andre Huijts" <a.huijts@upcmail.nl> wrote:
>>>
>>>> Yes, and I got that answer from Jed Margolin, he should know :)
>>>>
>>>> Verstuurd vanaf mijn iPad
>>>>
>>>> Op 4 mrt. 2014 om 00:29 heeft Joel Griffin Dodd <griffindodd@gmail.com>
>>>> het volgende geschreven:
>>>>
>>>> Also, not sure if it is related or not, but when the screen is 'full'
>>>> with objects, like the high score table I get a noticeable 'flicker' to the
>>>> whole screen, like it is struggling to update, the flickering is about 10
>>>> cycles per second (by eye) is this normal for Star Wars?
>>>>
>>>>
>>>> On Mon, Mar 3, 2014 at 3:26 PM, Mendel Pearl <mypearl@dds.nl> wrote:
>>>>
>>>>> Some AC on your DC rails should not matter for the output amp anyway.
>>>>>
>>>>>
>>>>> On 4-3-2014 00:25, Joel Griffin Dodd wrote:way
>>>>>
>>>>> OK I can try moving things around a little tonight and see what effect
>>>>> that has.
>>>>>
>>>>>
>>>>> On Mon, Mar 3, 2014 at 3:21 PM, teeray <teeray@earthlink.net> wrote:
>>>>>
>>>>>> use a scope to check the amp power supplies for AC ripple
>>>>>> and make sure all of the high voltage wires are as far away from the
>>>>>> board
>>>>>> as possible. Also make sure the X and Y input wires are away from any
>>>>>> high voltage.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> -----Original Message-----
>>>>>> From: Joel Griffin Dodd
>>>>>> Sent: Mar 3, 2014 6:13 PM
>>>>>> To: vectorlist@vectorlist.org
>>>>>> Subject: Re: VECTOR: Weird distorted shapes
>>>>>>
>>>>>> How would I check for that Tim?
>>>>>>
>>>>>>
>>>>>> On Mon, Mar 3, 2014 at 3:11 PM, teeray <teeray@earthlink.net> wrote:
>>>>>>
>>>>>>> Looks like you have some AC voltage getting into the X and Y amps.
>>>>>>>
>>>>>>> Tim
>>>>>>>
>>>>>>>
>>>>>>> -----Original Message-----
>>>>>>> From: Joel Griffin Dodd
>>>>>>> Sent: Mar 3, 2014 2:19 PM
>>>>>>> To: vectorlist@vectorlist.org
>>>>>>> Subject: VECTOR: Weird distorted shapes
>>>>>>>
>>>>>>> Hi all,
>>>>>>>
>>>>>>> Doug and I have been working on building a reproduction 25"
>>>>>>> Amplifone using a new deflection board design from an Australian designer
>>>>>>> (Dez). Overall it's working extremely well, but we are seeing some odd
>>>>>>> distortion in shapes. It's most apparent in circles, but can been seen in
>>>>>>> most shapes on the screen where letters look a little warped and joins
>>>>>>> between vectors overlap.
>>>>>>>
>>>>>>> I know even 6100 deflection boards do have a little of this, but
>>>>>>> it seems to be more apparent on our board.
>>>>>>>
>>>>>>> Here's an extreme example of the death star on the star wars start
>>>>>>> game menu...
>>>>>>>
>>>>>>> https://www.dropbox.com/s/i1r76l4dif9vv2w/2014-03-02%2020.10.19.jpg
>>>>>>>
>>>>>>> Doug mentioned that he thought it may be down to the tolerances of
>>>>>>> some of the new components we are using on the deflection board. I wanted
>>>>>>> to throw it out to the group to see if anyone has any ideas of where we
>>>>>>> might look in the circuit to investigate this odd issue.
>>>>>>>
>>>>>>> Joel
>>>>>>>
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>>>>>>> comments, or problems to chris@westnet.com
>>>>>>
>>>>>>
>>>>>> ---------------------------------------------------------------------------
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>>>>>> comments, or problems to chris@westnet.com
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>

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Received on Mon Mar 3 23:10:12 2014