[ARC5] Looks Very Interesting

[Michael A. Bittner]

There is no local oscillator for first down conversion in the ARR-1 or the ARR-2.  The YG UHF signal is modulated by a broadcast band frequency.  What looks like the first down converter in the ARR-1 and the ARR-2 is actually a demodulator whose output is the broadcast band frequency.  Hence there is no need for two motors.  It looks to me like the combination of ARR-1 + R-24 + Yardley whould function exactly like the motorized ARR-2.  Mike, W6MAB
  ----- Original Message ----- 
  From: Jay Coward 
  To: mmab at cox.net ; aaf-radio-1 at aafradio.org ; releazer at earthlink.net ; arc5 at mailman.qth.net 
  Sent: Friday, November 22, 2013 5:37 PM
  Subject: Re: [ARC5] Looks Very Interesting


  Remember, the ARR-1 is the tunable VHF front end and first down conversion to MF. The R-24 is the second down conversion and  IF and detector. Since the ARR-1 has a fixed LO, it has a variable frequency IF out. Thus a tunable second conversion down converter / IF in the R-24. To "autotune" this arraignment  you would have to have two motors but have different tuning characteristics for each and synchronize them.
   That's why they developed the ARR-2 and its eventual "autotune" version. And again, the Yardley mechanism is larger than the ARR-1.
  Jay KE6PPF

  -----Original Message-----
  From: Michael A. Bittner <mmab at cox.net>
  To: aaf-radio-1 <aaf-radio-1 at aafradio.org>; releazer <releazer at earthlink.net>; arc5 <arc5 at mailman.qth.net>; Jay Coward <jcoward5452 at aol.com>
  Sent: Fri, Nov 22, 2013 4:35 pm
  Subject: Re: [ARC5] Looks Very Interesting


  I have two ARR-2s, one with, and one without, the motor.  We're not talking ARR-2 here.  If the Yardlley Spot Tuner fits on an R-26, it seems to me it should also fit on an R-24.  I think the ARR-1 or ZB-3 output should be tunable by the R-24.  Or is it just a coincidence that both the the YG system and the Yardley have six channels numbered 1 thru 6?  Mike, W6MAB
    ----- Original Message ----- 
    From: Jay Coward 
    To: mmab at cox.net ; aaf-radio-1 at aafradio.org ; releazer at earthlink.net ; arc5 at mailman.qth.net 
    Sent: Friday, November 22, 2013 4:13 PM
    Subject: Re: [ARC5] Looks Very Interesting


    It would not fit. The later ARR-2 had some models with a motor to change channels rather than a spline cable.
    Jay
    -----Original Message-----
    From: Michael A. Bittner <mmab at cox.net>
    To: Mike Hanz <aaf-radio-1 at aafradio.org>; Jay Coward <jcoward5452 at aol.com>; releazer <releazer at earthlink.net>; arc5 <arc5 at mailman.qth.net>
    Sent: Fri, Nov 22, 2013 2:12 pm
    Subject: Re: [ARC5] Looks Very Interesting


    Couldn't this Yardley gizmo be used on a Broadcast Band ARC-5 with an AN/ARR-1 connected to tune to the six channels of the YG Homing system?