[Moon-Net] SPIDs

serge ve1kg at eastlink.ca
Wed Nov 2 21:08:15 CET 2016

Thank you Alex for correcting me. Yes the IQ+ does not decode but MAP65 does. However for map65 to decode it requires signal from the IQ+ so it is really a play on words.
What I should have said is the following  The combination of the IQ+ & MAP65 does not decode as well as my 40 year old ICOM 275A & WSJT 7.
I will try to do what you suggested regarding more gain at the input of the IQ+.
Thank you Alex always a pleasure to hear from you
Serge VE1KG
  ----- Original Message ----- 
  From: Alex Artieda 
  To: 'serge' ; 'Peter Connors' ; moon-net at mailman.pe1itr.com 
  Sent: Wednesday, November 02, 2016 5:58 PM
  Subject: RE: [Moon-Net] SPIDs

  Hello Serge


  Many times I said "the IQ+ don't decode" is the software who decodes, if you are presenting just 20dB gain at the input of the IQ+ then you are not following the specifications, you must have at least 24dB, regarding WSJT, install WSJT10, I really don't understand why people insist WSJT7 decode better, Joe already said that many times.




  73 de Alex, ZS6EME


  From: moon-net-bounces at mailman.pe1itr.com [mailto:moon-net-bounces at mailman.pe1itr.com] On Behalf Of serge
  Sent: Mittwoch, 2. November 2016 15:19
  To: Peter Connors; moon-net at mailman.pe1itr.com
  Subject: Re: [Moon-Net] SPIDs


  Peter & all GA

  Just set up your rotor. Run to it good size shield wires. 80M is a long length. Just measure the voltage at the end of the line with the rotor hooked up & see if the voltage drops when you activate your rotor with a load & adjust voltage accordingly. I do not know what is the current is when rotor is activated but the controller should provide the required voltage & available current at the rotor. 240 feet of cable is long cable but it should work if a good size cable is used. There is I believe 4 wires 2 for power & 2 for data.

  GL Peter

  Serge VE1KG

    ----- Original Message ----- 

    From: Peter Connors 

    To: moon-net at mailman.pe1itr.com 

    Sent: Wednesday, November 02, 2016 1:57 PM

    Subject: Re: [Moon-Net] SPIDs


    This is of  interest to me because I am in the process of assembling an eme station using the RAS with a ~80m cable run so I have searched the internet (and the Moon-net archives back to 2012 so far) for information. While there are significant differences in systems that experience problems/no problems there is no single definitive source of information on 'the right way to do it'. 

    From what I have read, the difference in the outcome for different stations appears to be affected by whether the RAS is HR (which appears much less noise immune), the motor cable size/resistance, power supply regulation, psu sharing between the controller and the motors, the model of the controller, the sensor cable construction and its screening/earthing. The degree of mechanical imbalance/inertia in the array will also affect the startup currents and thus the voltage drop and/or noise spike in the system. Anything I have fogotten? Maybe the firmware...

    What one station will 'get away with' is not always replicated by another with different system values, and the lack of a full set of parameters can leave a Spid user in the dark. Meanwhile, the information search turns up all sorts of useful stuff - and its fun!

    Pete, G4PLZ

    On 02/11/2016 11:09, Bjorn wrote:

      Some areas of interest pops up at an "even timesppread basis", and has almost the same content every time. Maybe creating an archive type of wiki would be a good plan?


      But anyway, time for a repeat:

      I am running approx 19V to my RAS/RAK rotators. Good cabling (of course shielded) and good power/cabling in the PS-line, No zeroing of directions at powr faults and no problem starting both az/el at the same time. No lost pulses. Be aware that the motor can take up to 10A in the startup spike, so starting both at the same time = could be up to 20A, if voltage drops too much = lost pulses. 


      73 de SM7SJR, Bjorn




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