6G Celicas Forums

Hello there, I have a question about my antenna reception. I've had a Pioneer P2900MP for a while now that was connected as to use an external amp outside the deck. In this case, it was using the stock toyota amp. I decided I wanted to use the amp inside the deck instead as to not potentially harm the stock amp in future use. So I had to make my own harness that went from the output of the deck and connect to the cable that was connected to the output of the amp as to bypass the amp completely. After doing so my reception has been worse than it used to be. Stations come in and out sometimes that use to come in clear all the time. My question is does anyone know if the Antenna signal was amplified in the stock amp? Since I bypassed it maybe there is no boost? Or can anyone think of interference issues. In an attempt to fix the issue I decided to by a connector that could also use the window antenna as well. Seemed to help a little bit but not much at all. Thanks for the help!

To start with the glass antenna is only for an OEM Fujitsu Ten split tuner radio. The small plug for the glass or local signal antenna will only work with a tuner that has that capability. On later models the short (glass antenna) would go through the OEM amp to split the signal instead of directly into the back of the radio. The glass is for short range reception and the power antenna is for long distance. If you try to use both on a standard system the short legnth antenna will cause interference on the long legnth antenna. Basically canceling out the reception of the power antenna. No adapter will work with both, you have to have the split tuner or amp. To get the long antenna to work well with an aftermarket radio you need to trim the tuner reception to match your antenna. Refer to your Pioneer radio instructions on where the trim screw is and it'll tell you how to adjust. Move & wrap your short antenna plug away from the back of your new radio so it can't interfere with the long antenna and your reception will be good. I had to do this exact procedure for my Panasoinc and I have excellent reception. If your Pioneer radio doesn't have the capability of triming the antenna, that may be a problem. And just so you know I tried a signal amp for the long antenna before I realized what was happening and that just made the reception worse.

This post has been edited by pyeatts: Jul 11, 2010 - 8:25 PM