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Vectrex audio buzzing [message #59702] Wed, 08 May 2013 22:08 Go to next message
knudsen is currently offline  knudsen
Messages: 173
Registered: February 2013
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Senior Member
Message-ID: <1983@ihnss.UUCP>
Date: Wed, 28-Mar-84 20:27:28 EST
Article-I.D.: ihnss.1983
Posted: Wed Mar 28 20:27:28 1984
Date-Received: Fri, 30-Mar-84 01:04:44 EST
Organization: AT&T Bell Labs, Naperville, IL
Lines: 15

People have asked me about the buzzing sound(s) that Vectrx makes
while running.  Some even thought there was something wrong.
Well, the three units I've seen all do it the same.
The buzz is independent of volume setting, so cranking up the knob
all the way is a big help, if family can stand it.
The buzz must be getting in between the GI sound chip on the lower PC
board and the audio power amp IC on the side board.
Noise comes from the deflection amps, and you can hear it change pitch--
gets way down when the system is very busy, and more complex when
there is lots of stuff on the screen.  Helps give you a feel for how
hard the machine is working at any moment, but yes, it is a PEST.
You who have tapped off the audio into your stereo system-- how much
of the buzz comes thru there?
Anyway, there's nothing wrong with your machine, just cheap
(ain't we glad?)	mike k
Re: Vectrex audio buzzing [message #59705 is a reply to message #59702] Wed, 08 May 2013 22:08 Go to previous message
Richard[1][2][3] is currently offline  Richard[1][2][3]
Messages: 4
Registered: May 2013
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Junior Member
Message-ID: <1048@dartvax.UUCP>
Date: Thu, 29-Mar-84 16:49:08 EST
Article-I.D.: dartvax.1048
Posted: Thu Mar 29 16:49:08 1984
Date-Received: Sat, 31-Mar-84 09:42:57 EST
References: <1983@ihnss.UUCP>
Organization: Dartmouth College
Lines: 14

[sacrificial line to the great Letter Eater]

Over the last few months I've noticed this net has been dominated by the 
supporters and hackers of the vectrex system.  I have a simple question, and 
pardon me if it is too obvious: With this type of support, why is it no
longer being made?  Finincial problems?  Thanx, it's just something I've
been wondering about...
---

-- 
-----
From the land of Stefen King:
...decvax!dartvax!richard, Richard Brown, Dartmouth College
Re: Vectrex audio buzzing [message #59706 is a reply to message #59702] Wed, 08 May 2013 22:08 Go to previous message
gnome is currently offline  gnome
Messages: 62
Registered: May 2013
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Message-ID: <135@olivee.UUCP>
Date: Fri, 30-Mar-84 14:49:18 EST
Article-I.D.: olivee.135
Posted: Fri Mar 30 14:49:18 1984
Date-Received: Sun, 1-Apr-84 07:09:47 EST
References: <1983@ihnss.UUCP>
Organization: Olivetti ATC., Cupertino, Ca
Lines: 8

I was told that the buzzing was not from leakage (into
the audio section) but from impulse loading on the
power supply.  I haven't tried to beef up the supply
because of the hassle/ugliness aspects.  I hope
to scope around and see what's going on in the little
criiter.

Gary
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