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honsey
New registered user

Joined: 29 Jan 2014 Posts: 7
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can't get 25W pallet amp running at all |
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Hello there,
i'm a bit under time pressure... because of that i had to write to support and also post my problem in the forum. maybe another user experienced the same problem i have at the moment:
im trying to drive a 25W pallet amp from a custom fm transmitterboard based on si4713. i wired the tx-output with the amp-input and the amp-output with a filter, then to a ground pole antenna (~70cm).
when i turn on the power supply for the amp (13.8V, 8A/10max) nothing happens. the power supply has an ampere meter, but that doesn't show any activity.
product page of the pallet amp says: 1-3mW input. on the pallet amp itself the rf input is labeled with 10mW max. is there a "official" manual?
from the datasheet of the si4713 i can read: tx power up to 118dBµV, which should be something around 12.5mW
is it possible that i destroyed the pallet, because i exceeded by 2.5mW? why is it not working — am i missing something? do i have to apply voltage to the vco-pads in any case?
hope you guys can help me — thanks a lot in advance!
hans
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Thu Jan 30, 2014 2:29 am |
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pcs
Site master


Joined: 18 Jan 2002 Posts: 3099 Location: Radio Land |
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After discussing this directly via e-mail it turns out to be a problem of poor wiring and a lack of series capacitor in exciter module.
In short; there is no problem with the pallet itself.
_________________ Best regards,
Marko - PCS Electronics
--------------------------------------------------------
Turn your PC into a FM radio station!
http://www.pcs-electronics.com
fax +386 4 2316 128 |
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Thu Jan 30, 2014 3:41 pm |
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honsey
New registered user

Joined: 29 Jan 2014 Posts: 7
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yes — thanks again for the fast support. got it all running now!
ciao,
hans
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Tue Feb 04, 2014 11:36 am |
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