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Zoom on ISA max modulation

 
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Zoom on ISA max modulation
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Bazz
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Post Zoom on ISA max modulation Reply with quote
Hi,

I have been using the ISA max for half a year now, working fine. A week ago a zoom sound came in the modulation. It is not a common 50Hz zoom, more like a fan sound. I've tried to cover the card from any air streams in my PC, without succes. The zoom appears after aprox 10 minutes, the first 10 minutes the sound is perfect. Does anybody have an idea what it could be?

Bazz
The Netherlands
Sat Jun 19, 2004 6:57 pm
Bazz
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Post Some more info: Reply with quote
Using no external power supply, zoom appears to decrease when power is set to a low value. At 100% the zoom becomes louder.
Sat Jun 19, 2004 7:08 pm
pcs
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Post Reply with quote
That's the ancient ISA MAX card for ISA bus?

Try to move your antenna around a bit and see if that has any
effect.

Does it happen at any frequency?

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Marko - PCS Electronics
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Sun Jun 20, 2004 5:38 pm View user's profile Send private message Visit poster's website
Bazz
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Post No effect Reply with quote
Both suggestions have no effect. Changing the frequency does not affect the zoom and moving the antenna does not have an affect either. Nothing has been changed in the harware configuration, the zoom started to come in suddenly. Do you have any other suggestions?
Sat Jul 03, 2004 6:42 pm
Bazz
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Post And yes Reply with quote
This is the ISA MAX, but it is not ancient, it works perfect except for the zoom. As long as the PCI MAX does not have 1W power output I cannot use it.
Thu Jul 08, 2004 10:12 pm
pcs
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Post Reply with quote
I call it ancient since its been many years since we stopped
selling these.

Are you using external power supply?

_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Fri Jul 09, 2004 12:49 am View user's profile Send private message Visit poster's website
Sir Nigel
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Post Reply with quote
I don't know of any new computers that even have ISA slots. That was soooo long ago.

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Sat Jul 10, 2004 2:56 am View user's profile Send private message Visit poster's website
Bazz
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Post It doesn't operate with Reply with quote
It doesn't operate with an external power supply. Do you think the computer's power supply can cause interference after a while? I have tried another grafics card to see if this stops the interference. The experiment still continues...so far so good.

About the ISA slot, it is an old pc, AMD K6 200 MHz Win98 and with 3 ISA slots.
Tue Jul 13, 2004 8:40 pm
pcs
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Joined: 18 Jan 2002
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Post Reply with quote
As far as I remember the external power supply had to be more than 12.5V or so. Use 13.8V to be sure.

_________________
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Tue Jul 13, 2004 9:09 pm View user's profile Send private message Visit poster's website
Bazz
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Post Thanks Reply with quote
I will try the external power supply and keep you up to date about the progress via this forum.
Wed Jul 21, 2004 8:46 pm
Bazz
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Post It works Reply with quote
The external power supply creates no zooming sound, so this is perfect. I tried it with 12V and that's ok. I will try it with 13,8 later, butt I guess it works too. Thanks for the tips.
Sun Aug 08, 2004 6:03 pm
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