[Heathkit] monitor scopes

[Bob Macklin]

Also by using the trapezoidal display you instantly can see both the linearity and modulation level.

Bob Macklin
K5MYJ
Kent (Seattle), Wa,
"Real Radios Glow in the Dark"

  ----- Original Message ----- 
  From: Michael Waldrop 
  To: Bob Macklin ; heathkit at mailman.qth.net 
  Sent: Sunday, September 28, 2008 10:32 AM
  Subject: Re: [Heathkit] monitor scopes


        I could not agree more Bob.

        73
        Mike
        W5RKL


        --- On Sun, 9/28/08, Bob Macklin <macklinbob at msn.com> wrote:

          From: Bob Macklin <macklinbob at msn.com>
          Subject: Re: [Heathkit] monitor scopes
          To: w5rkl at yahoo.com
          Date: Sunday, September 28, 2008, 12:04 PM


          in actuality in the case of SSB operation, Rx IF display is the least useful thing. On a crowded band using SSB or CW all you will see is noise.

          We used to use the Rx IF monitoring in the AM days to look at the sending stations modulation. In the case of SSB this really only works when the sending station is transmitting constant tones.

          You might just as well hook up a real scope to monitor the IF for test purposes.

          The owner of the Transmitter should have method of monitoring his own modulation. That's were the SB-610, SB-614, and HO-10 come into play.

          Bob Macklin
          K5MYJ
          Kent (Seattle), Wa,
          "Real Radios Glow in the Dark"

            ----- Original Message ----- 
            From: Michael Waldrop 
            To: Bob Macklin 
            Sent: Sunday, September 28, 2008 9:55 AM
            Subject: Re: [Heathkit] monitor scopes


                  Although receiver IF monitoring is a nice thing to have, that is not the only important thing to consider about a monitor scope. A monitor scope should be able to produce a clean display of the actual RF signal being transmitted. This allows the operator to determine, at a glance, whether his/her transmit signal is flat topping, the transmitter is being over modulated, the transmitted signal contains parasitic emissions, equality in sidebands (LSB and USB), non-linearity in the transmitted signal, or AC ripple on his/her transmitted signal. These are only a few of the things a monitor scope can display to the operator.


                  73
                  Mike
                  W5RKL


                  --- On Sun, 9/28/08, Bob Macklin <macklinbob at msn.com> wrote:

                    From: Bob Macklin <macklinbob at msn.com>
                    Subject: Re: [Heathkit] monitor scopes
                    To: "Michael Tortorella" <w2iy at verizon.net>, heathkit at mailman.qth.net
                    Date: Sunday, September 28, 2008, 9:46 AM


                    What features of a monitor scope are you interested it in.

                    Both scopes display the RF on the feed line. The SB-610 CAN display the Rx IF. But it can be wired to display the audio. If the IF is to be displayed it must be wired for the proper IF frequency.

                    The SB-610 also has the needed tone generators for adjusting a SSB Tx.

                    I have both. The SB-610 in on my SB-301/SB-401 station. My SB-614 is on my DX-60/HG-10/HR-10 station. I am currently only using them to monitor the Tx RF.

                    Bob Macklin
                    K5MYJ
                    Kent (Seattle), Wa,
                    "Real Radios Glow in the Dark"

                      ----- Original Message ----- 
                      From: Michael Tortorella 
                      To: heathkit at mailman.qth.net 
                      Sent: Saturday, September 27, 2008 9:53 PM
                      Subject: [Heathkit] monitor scopes


                      G’day all, can anyone comment on the relative merits of the SB-610 and SB-614 monitor scopes?  As far as I can tell, the major difference is that the SB-614 runs off audio while the SB-610 needs an IF connection.  But there may be other things to be aware of…any comments from users of either or both would be most welcome.

                      aTdHvAaNnKcSe and 73 to all

                      Mike W2IY


                 

       

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