Re: G08 input voltages

I agree. The linear fashion in which the transistors drop voltage is bound
to produce a significant increase in power dissipation. Not only that, but
isn't the Vce max voltage of the transistors 120V ? I can imagine that
rating being exceeded by a significant margin whenever the monitor takes a
swing all the way to any one side. That would likely cause an immediate
catastrophic and permanent failure of the transistor. I would assume
further damage could result to other components when the short circuit
occurs.

William Boucher

----- Original Message -----
From: <kstillinger@sc.rr.com>
To: <vectorlist@vectorlist.org>
Cc: "utahtaper" <utahtaper@comcast.net>
Sent: Monday, December 15, 2008 5:25 PM
Subject: Re: VECTOR: G08 input voltages

> There is NO WAY that a G08 will be able to handle 120VAC where it is
> expecting 90VAC.
>
>
> The +/- 63VDC rails are generated by the most elementary diode rectifier
> bridge and capacitor combination there is.
> You would be directly scaling up the collector voltages on the yoke
> output transistors by 33 percent. Seeing that a common alteration to the
> operation is to DROP the input voltage for cooler operation, I would
> expect a heat based failure in short order.
>
> Kerry
>
> ---- utahtaper <utahtaper@comcast.net> wrote:
>> A couple years ago I bought a Skydiver that was converted into Star Trek.
>> The cabinet was falling apart and I ended up parting it. I suspect they
>> tapped into the isolation transformer to run the G08 from. From what I've
>> been told the G08 takes 90VAC(two lines of 45VAC). This transformer is
>> outputting 120VAC(Two lines of 60VAC). Anyone out there know if this
>> monitor can handle this voltage? It would seem it's a bad idea even
>> though the converted game had been running that way for who knows how
>> long. I was hoping to try it out with my ZVG setup.
>
> ---------------------------------------------------------------------------
> ** Unsubscribe, subscribe, or view the archives at
> http://www.vectorlist.org
> ** Please direct other questions, comments, or problems to
> chris@westnet.com

---------------------------------------------------------------------------
** Unsubscribe, subscribe, or view the archives at http://www.vectorlist.org
** Please direct other questions, comments, or problems to chris@westnet.com
Received on Mon Dec 15 18:58:02 2008