Power up and down !!!

All posts related to PCI MAX transmittors go here!

Moderators: Sir Nigel, Nina, pcs, 5r, phpBB2 - Administrators

Post Reply
User avatar
omegalx13
New registered user
New registered user
Posts: 16
Joined: Sat Nov 03, 2007 2:54 pm

Power up and down !!!

Post by omegalx13 »

With a booster 15W, i ve a power start with 20 W and down at 14 15 W (temperature up) mesured with a wattmetter. Now, after two week, i ve take my sender witch its stocked in a cellar and the power start with 20 W and down 10 W, :( the power up and down 5 - 10 - 15 W and if i add a ventilator on the pci card, the power up and stabilized to 14W. But without a ventilator, before, i had 15W after 15min start. Without this ventilator, now, i have a crazy power !!!

Help me
User avatar
djhubbalubba
Compulsive poster:)
Compulsive poster:)
Posts: 77
Joined: Tue May 29, 2007 7:43 pm
Location: In Studio

Post by djhubbalubba »

I kill the output transistor on my max pro 3 with 15 output before, I have about 20watt output and i think thats the reasen why it was damaged.

Use good ventilation and a fan, and i think the power will be stabilized :)
User avatar
pcs
Site master
Site master
Posts: 3132
Joined: Fri Jan 18, 2002 1:00 am
Location: Radio Land
Contact:

Post by pcs »

The reason for changes in power is temperature protection.

Unit protects itself by powering off a little until it cools off.
This is why a fan helps :)
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
User avatar
omegalx13
New registered user
New registered user
Posts: 16
Joined: Sat Nov 03, 2007 2:54 pm

Post by omegalx13 »

yes but, before, i ve not this problem, i ve changed nothing since. I m just wait a few periode in a cold piece and i take this for install in the same place, with the same setup...
User avatar
pcs
Site master
Site master
Posts: 3132
Joined: Fri Jan 18, 2002 1:00 am
Location: Radio Land
Contact:

Post by pcs »

The only things that affects the power are:
- Power supply voltage
- Temperature

The temperature inside a PC can fluctuate even if it seems that there is no difference,
especially if the lid is closed. A typical computer CPU power draw can go from 5-10W
to 100W depending on computational requirements, which also mean a big variation
of temperature.

I can tell you how to disable protection, but do not come crying to me when the
final transistor dies due to overheating.
Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128
Post Reply