> I've been reading the phasing posts with interest, to make a long story > short I recently moved my radios to another room much closer to my 2 400' > LW's and find that the antennas with the much shortened coax leads are > overloading my Quantum Phaser with it's untuned front end unless I turn the > 10-15 db internal amp control almost down to nothing which actually leaves > me with very low S meter readings and not a lot of signal. My radios work > fine without the Phaser with these same antennas with no overloading and > much higher signal strengths. > Does anyone here use or know of any phasers which can be used with LW's like > this or even Beverage antennas with no overloading, or perhaps a way of > cutting some of the signal down before it hits the Phaser? Or maybe even > tuned traps to filter out strong locals? Thanks
It's interesting that shortening the coax brough problems. Most coax has a very low loss at AM BCB freqencies. Have you tried simply adding the coax back to the feed and coiling it up under the bench? The Quantum phaser uses the amplifier for two purposes. First is obviously to boost the signal. The second is to present a very high impedence to the phasing circuit. This seems to smooth out the level changes as the phase knob is turned. Like any amp, this has a limited headroom. There are a couple of possibilities. Have you tried dropping each of the input levels to the halfway point? That may do what you need. I have made a two-section notch filter to use in my truck. When parked right next to a tower, it makes a big difference. It was simple to build. I think I wrote up a description of it recently. That would only help with your 830 problem though. If you can find a passive phaser and then add an external high quality amplifier like a DX Engineering RPA-1 I think you'll be fine. It is possible to modify the Quantum, but I'm not sure I would. It'd be better to find another. Craig Healy Providence, RI _______________________________________________ IRCA mailing list [email protected] http://arizona.hard-core-dx.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: [email protected]
