Date: Wed, 16 Feb 2000 08:34:02 0
From: John Gregory <[EMAIL PROTECTED]>
Subject: Re: silencing the modem?
Hi Michael
16/02/00 Nettamer List <[EMAIL PROTECTED]> said:
MD>Date: Tue, 15 Feb 2000 17:59:56 +0000 From: "Michael L.
MD>Dawley" <[EMAIL PROTECTED]> Subject: Re: silencing the modem?
MD>On Tue, 15 Feb 2000 07:34:11 -0500, Nettamer List wrote:
JG>>It's a Hayes Optima 288 VFC+Fax and it must be quite
JG>rugged as I spent the first week after I bought it
JG>second hand failing to get it to work until I
JG>substituted 9v AC for the 9V DC I'd been using <g>
MD>I took my Hayes Accura apart once, and noticed a big heat sink
MD>attached to an SCR transistor, an wondered what it was there
MD>for. Then, when I got a Hayes 9VAC adapter for it, I realized
MD>that the AC to DC conversion was taking place right inside
MD>the modem, and in fact, when the modem is on, the top of the
MD>case gets warm where the SCR is located. Also, the adapter
MD>has an output rated at 800 milliampheres, which is quite
MD>high, and is needed to handle the big AC to DC setup inside
MD>the modem...
I've just checked the top of the case of my Optima after being
switched on for just over an hour and it's warm to the touch as you
say. That explains the substantial metal case unlike the cheap
plastic on my spare Motorola 3400 Online.
Cheers
jaygee
"NT with NTR - DOS alive in Win95"
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