Re: SW Death Star Blooming

an old subject I know but today I repaired an Amp HV with a good Red and
thought It would be interesting to compare voltages to the WG6100 mod I did
a while back. On death star explosion there is no blooming with a good
red/capacitors...I heard it was designed into the game but on this one the
HV stays steady as a rock, with no change in picture size during the
explosion. Has anyone else noticed this?
----- Original Message -----
From: "simon" <simonjhanlon@btopenworld.com>
To: <vectorlist@vectorlist.org>
Sent: Thursday, March 30, 2006 10:34 AM
Subject: Re: VECTOR: SW Death Star Blooming

>I checked the B+ while the DS explodes and it drops 30v for a second then
>recovers.
>
>
> ----- Original Message -----
> From: "Mark Shostak" <xx.vl@cinelabs.com>
> To: <vectorlist@vectorlist.org>
> Sent: Wednesday, March 29, 2006 1:44 PM
> Subject: Re: VECTOR: SW Death Star Blooming
>
>
>> On Wed, Mar 29, 2006 at 07:09:30AM -0500, Christopher X. Candreva wrote:
>>> On Wed, 29 Mar 2006, simon wrote:
>>>
>>> > I noted the other day that as on most vector monitors during the death
>>> > star explosion some blooming is noticeable. I have heard that this was
>>> > intentional, I find this hard to believe. I just rigged up my HV probe
>>> > on
>>> > my SW so that I could read the EHT during game play. it was rock
>>> > steady at
>>> > 19.5KV until the explosion...it dropped by 4kv!! I thought as much.
>>> > This
>>> > must be due to the amount of white screen. Can someone else check
>>> > their
>>>
>>> Actually as I recall, this was on purpose. In the death start explosion
>>> the
>>> HV is lowered to defocus the display, to add to the explosion effect.
>>>
>>> Now this could be a case of saying "It's not a bug, it's a feature !".
>>
>> For those who weren't around, or forgot, here are Jed's comments on the
>> topic:
>>
>> In order to have the Death Star explode the way we wanted it to, it
>> wasn't enough to draw lots of concentric circles. We wanted to defocus
>> the beam to fill it in. We briefly considered adding a vacuum tube to the
>> monitor to control the Focus Voltage. Fortunately, the lead time for the
>> part was too long. So what I did was to give the Vector Generator the
>> ability to overdrive the monitor's color inputs. Overdriving the inputs
>> causes the CRT to draw more current than it normally uses and drags down
>> the High Voltage., which changes the normal ratio of Focus Grid voltage
>> to Anode voltage, which defocuses the beam. This relationship is
>> explained in The Secret Life of XY Monitors.
>>
>> The entire text is here: http://www.jmargolin.com/vgens/vgens.htm#Star
>>
>> -Mark
>>
>>
>>
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>
>
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Received on Fri May 19 17:32:49 2006