> http://www.analog.com/en/audiovideo-products/audio-signal-processors/ad1990/products/product.html
One problem with this class of device is the bridge tied outputs. The speaker(s) are no longer ground referenced - both sides must float. This increases RFI issues (not the RF chokes in the output) and will not allow the use of a three conductor jack for speaker output. 73, ... Joe, W4TV On 5/27/2011 7:51 PM, Brendan Minish wrote: > The surplus Motorola speaker are truly excellent speakers for radio use, > both mobile and in the shack. > They have high efficiency and a frequency response that is ideal for > Radio use. > > I don't know what type of AF amp the KX3 will use but there are now some > really superb class 'D' switching audio amp chips available that can > generate lots of clean audio with very high power efficiency > See > http://en.wikipedia.org/wiki/Class_D_Amplifier > and > http://www.analog.com/en/audiovideo-products/audio-signal-processors/ad1990/products/product.html > > Also Motorola made some amplified speakers these are very good for noisy > vehicles too > > On Fri, 2011-05-27 at 12:09 -0700, George Winship, NC5G wrote: > >> Thanks Wayne, for your prompt reply. I will check out this out. Presently I >> use an old Motorola mobile speaker with the IC-730. Most of my mobile ops >> are in a 1995 3/4 ton Chevy. No CD, but maybe can find an old cassette >> interface. > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html