[Heathkit] monitor scopes

[Michael Waldrop]

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


          
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          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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