DW,
Well, this is a multipart question but let me try to be brief.? There are several types of speech processors and the SP-75 is illustrative of a compression type, not a clipper, etc.? The speech processor basically raises the amplitude of the lower amplitude speech components while not allowing the higher amplitude ones to go much higher.? This results in an increase in talk power.? It improves intelligibility and there is no splatter, assuming only a certain amount of compression is used (how many db varies from rig to rig).? In other words intelligibility is increased under difficult band conditions.? Your average power goes up so if you use a linear, you are significantly increasing the duty cycle.? For some "marginal" amps, you may have to limit the input power since their power supplies, cooling, etc. might not be able to handle the increased duty cycle. When you take a look at the specs for a linear, look at the CW and AM capabilities with respect to SSB.? Many legal limit (for SSB) amps can't do legal limit in all modes (incl. AM and CW). 73, Evan, K9SQG -----Original Message----- From: DW Holtman <[EMAIL PROTECTED]> To: drakelist <[EMAIL PROTECTED]> Sent: Thu, 4 Oct 2007 1:11 pm Subject: [drakelist] SP-75 Speech Processor Hello, ? Will?a SP-75?Speech Processor really improve my signal, so in situations where I'm barely heard, my signal will be easier to copy? How does it do this? Dosen't increasing the audio cause splatter? Why didn't the original manufactures use the most optimal audio modulation? ? I'm completely ignorant on the use of speech processors. I have a SP-75 that does not work, and was wondering if spending the time to fix it, would be time well spent. ? Thank you in advance. ? Best, DW Holtman WB7SSN ? ________________________________________________________________________ Email and AIM finally together. You've gotta check out free AOL Mail! - http://mail.aol.com
