[Kenwood] Kenwood TS850 - improved audio quality and reducedoutput

[Peter Ravn]

Hello Mike

"First, ALC does not indicate of how much RF output power your transmitter is producing. ALC voltage is not like an RF driving signal, meaing the higher the ALC meter reading the higher RF output the final amplifier will produce."

No wonder you were puzzled. The power meter on the TS850 was naturally what I meant. Although it may not be very accurate, it does indicate the fall in RF output.

73
Peter
OZ8CTH




  ----- Original Message ----- 
  From: Michael Waldrop 
  To: Kenwood at mailman.qth.net ; Peter Ravn ; Dave Edwards 
  Sent: Sunday, November 09, 2008 9:18 PM
  Subject: Re: [Kenwood] Kenwood TS850 - improved audio quality and reducedoutput


        I agree, use a microphone designed for the radio. 

        By the way, the transmitter's speech amplifier is only designed to pass a certain range of audio frequencies. Trying to pass audio frequencies outside the upper and lower audio frequency limits of the speech amplifier is like trying to push a complete hard boiled egg through the small opening of a soda bottle without messing up the egg. No, creating a vacuum inside the bottle does not count...:) 

        73
        Mike
        W5RKL


        --- On Sun, 11/9/08, Dave Edwards <kd2e at comcast.net> wrote:

          From: Dave Edwards <kd2e at comcast.net>
          Subject: Re: [Kenwood] Kenwood TS850 - improved audio quality and reducedoutput
          To: w5rkl at yahoo.com, Kenwood at mailman.qth.net, "Peter Ravn" <fasan5 at privat.dk>
          Date: Sunday, November 9, 2008, 1:39 PM


          Plus...to avoid complications (and probably end up with a better signal!!) I'd suggest removing all that slop, and plug in an MC60 microphone and have fun on the air!!

          ...Dave
            ----- Original Message ----- 
            From: Michael Waldrop 
            To: Kenwood at mailman.qth.net ; Peter Ravn 
            Sent: Sunday, November 09, 2008 2:14 PM
            Subject: Re: [Kenwood] Kenwood TS850 - improved audio quality and reducedoutput


                  Hello Peter,

                  What do you mean by

                  "No matter what I do, it is impossible to reach the magic 100 watt on the ALC meter"

                  First, ALC does not indicate of how much RF output power your transmitter is producing. ALC voltage is not like an RF driving signal, meaing the higher the ALC meter reading the higher RF output the final amplifier will produce.

                  ALC is a "control voltage" that is used to "control an earlier stage's gain" in order to bring the final amplifier back into a more "linear state". ALC voltage is produced when the final amplifier is "no longer operating in a linear state". Therefore, as the ALC voltage increases (higher ALC meter indication) the more "reduction in gain" of the earlier stage occurs.

                  73
                  Mike
                  W5RKL


                  --- On Sun, 11/9/08, Peter Ravn <fasan5 at privat.dk> wrote:

                    From: Peter Ravn <fasan5 at privat.dk>
                    Subject: [Kenwood] Kenwood TS850 - improved audio quality and reduced output
                    To: Kenwood at mailman.qth.net
                    Date: Sunday, November 9, 2008, 11:43 AM


                    After having replaced the HC5 microphone with the ATR30 by Audio Technica,   the audio quality of my Kenwood TS850S has improved considerably. As before I use the W2IHY 8 band equalizer and the EQ Plus by W2IHY, and the settings on the equalizers are on the whole as with the HC5. Only the processor gain and mike gain on the transceiver have been increased from 9 to 10 o'clock.
                    While audio quality has improved, output has gone down from 100 to about 85 watt. No matter what I do, it is impossible to reach the magic 100 watt on the ALC meter. Most surprisingly of all, the output from the equalizers to the transceiver are higher with the ATR30 than with the HC5. So where do the extra15 watt disappear into?

                    Thanks once again
                    OZ8CTH/Peter
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