M. W. Persons and Associates, Inc.

     Over 30 Years in Business

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Radio Broadcast Technical Consulting and Sales
 
10032 Island Drive, Brainerd, MN  56401

 


Engineer's Log of Mark W. Persons
Your Intrepid Radio Broadcast Engineer's Log Book


   November 21, 2016:   More added to the Hall of Shame
     November 9, 2016:   Calibrating Analog Audio Consoles article in Radio World
       October 11, 2016:   Broadcasters Clinic in Madison, Wisconsin
  September 28, 2016:   Low Pass Filter added to Continental 802 FM Exciter
    September 9, 2016:   Innovative Arc Gap Design
         August 18, 2016:   Josh Jones from Bohn Broadcast Stopped By
               July 6, 2016:   Take Pride in Your Workmanship Article In Radio World
             May 31, 2016:   BE 250 Watt IPA Updated
             May 24, 2016:   SBE Meeting in Minneapolis/St. Paul
             May 21, 2016:   Voice of America in Bethany, Ohio
             May 20, 2016:   Amateur Radio Hamvention in Dayton, Ohio
             May 17, 2016:   Fair Radio Sales in Lima, Ohio
               May 7, 2016:   Hamfest at Duluth/Superior
            April 29, 2016:   Bob Simmons from KNDK Radio in Langdon, North Dakota
            April 27, 2016:   "Testing and Using Power Transformers" article in Radio World
            April 15, 2016:   Brandon Moore from KFAI Radio
     February 17, 2016:   "RF Spectrum Analyzers: Not Just for Consultants" Radio World Article


   December 16, 2015:   "Bench Techniques and Tools of the Trade" Radio World Article
   November 10, 2015:   Harris Low Pass Filter and Directional Coupler
       October 27, 2015:   Nott Radial Chase Upgrade
       October 26, 2015:   QEI Quantum FM Exciter Modifications
   October 13-14, 2015:   Broadcasters Clinic and National SBE Meeting
  September 14, 2015:   Radio World Article about Packaging Equipment for Shipping
    September 3, 2015:   Radio World Article - The Ocean is Cruel to Broadcasters
            June 19, 2015:   Society of Broadcast Engineers Picnic in the Twin Cities
              April 8, 2015:   Radio World Article about Dick Witkovski, 58 Years in Broadcasting
          March 16, 2015:   Update to Continental 802B FM Exciter Power Amplifier Repair
            March 1, 2015:   Radio World Article, Part 2 on Tubes
      February 23, 2015:   Gates Diplomat and Executive Audio Console Modules Worked On
      February 18, 2015:   Good Friend Shane Toven is now with Telos Alliance
        February 6, 2015:   Three-Port FM RF Switch
        January 15, 2015:   A Visit to Broadcast Concepts
        February 1, 2015:   Radio World Article on How Tubes Work
         January 8, 2015:   Interviewed on Live Internet Television


      December 22, 2014:  BC-1G  Refurbished Gates BC-1G 1000 Watt AM Transmitter
      December 3, 2014:   "Repair a High Voltage Blocking Capacitor" Article Published in Radio World
        October 27, 2014:   Calibration Controls for Five AM Power Levels
        October 20, 2014:   VSWR Calibrator for FM Broadcast Transmitters
        October 14, 2014:   Jim Lamke from KOZY/KMFY Radio Stopped By
          October 8, 2014:   Article in Radio World Magazine
          October 1, 2014:   RF Low Pass Filter for an FM translator
   September 22, 2014:   Main/Auxiliary Antenna Switch for 5 KW
   September 19, 2014: ITA  Mystery Solved on What ITA Stands For
        August 13, 2014:  Article about Doing Sports Remotes published in Radio World Magazine
        August 11, 2014:  Moon Over Brainerd
          August 6, 2014:  AM RF Junction Box with Arc Gap
            July 14, 2014:  Clif Groth from Watertown, Wisconsin, Visited Here
           June 23, 2014:  A Trip to the top of the IDS Center in Downtown Minneapolis
              May 7, 2014:  Irritating Sound Article Published In Radio World
              May 7, 2014:  Jordan Zeller Stopped In
           April 12, 2014:  67th Birthday
             April 7, 2014:  Display Floors Opened
            April 5, 2014:  Speech at a Society of Broadcaster Engineers' Conference
            April 4, 2014:  Speech to the Association of Public Radio Engineers in Las Vegas
          March 9, 2014:  SBE HAMnet Chapter of the Air and Art Bell  revised 03-31-14
    February 15, 2014:  St. Cloud Cabin Fever Reliever Hamfest
      February 1, 2014:  Adjust Rules for NRSC Measurements
      January 23, 2014:  Phasor Box Removes RF Hazard
        January 8, 2014:  Where Have All The Broadcasters Gone? Book for Sale
        January 7, 2014:  Resistor and Switch Modification for Continental 802A & B FM Exciters


   December 31, 2012:  2013  Year End Review
   December 18, 2013: 
Fix a Transmitter Tube Socket Article in Radio World
   December 10, 2013:  Mark's Mother June Passed Away
     November 6, 2013:  Article Published in Radio World
     November 1, 2013:  Bill Satre Stopped By
       October 11, 2013:  More Power Scotty!
         October 9, 2013:  Long Time Client Rod Grams Passed Away
  September 28, 2013:  Trouble in a Harris FM 300 Watt IPA Module
  September 25, 2013:  Shorted Quarter Wave Stub for FM using 7/8" Rigid Line
         August 29, 2013:  A Trip to KLOH Radio
         August 26, 2013:  Randy Wabik visited from WEBC Radio
         August 23, 2013:  Pallet Amplifier for a BE IPA module
           August 9, 2013:  Dinner with Lou Buron and Mary Campbell
           August 6, 2013:  Radio Systems Audio Console Repair Job
           August 1, 2013:  Four AM Stations Sharing One Site Article in Radio World
             July 16, 2013:  Harris Z10 Rectifier Module Repair
             July 13, 2013:  Emergency Power Transformer Replacement for KCLD-FM
            June 23, 2013:  Collins AM RF Switch Repaired and Improved
            June 21, 2013:  SBE Chapter 17 Picnic
              June 9, 2013:   A Visit to iHeart Media in Minneapolis
              May 22, 2013:  Radio World Article on Shorted Quarter Wave Stubs
              May 20, 2013:  A Visit to Crown Broadcast in Elkhart, Indiana
              May 20, 2013:  A Visit to Fair Radio Sales
              May 18, 2013:  Voice of America
              May 17, 2013:  Hamvention in Dayton, Ohio
              May 16, 2013:  A Tour of Electronic Research in Chandler, Indiana
             May 15, 2013:   Microphone Museum and 88 Nine Radio in Milwaukee, Wisconsin
               May 8, 2013:   Still More FM Exciters in the Shop for Repair
               May 4, 2013:   Hamfest in Superior, Wisconsin
            April 25, 2013:   FM Combiner Configured and Tuned
            April 17, 2013:   DX Listener Reports from Norway and Finland
            April 10, 2013:   Radio World Article on FM Exciter Repairs
              April 1, 2013:   Dihydrous Monoxide Discovered
          March 26, 2013:   New On/Off Swiches for a Continental FM Transmitter
            March 7, 2013:   Two Manual Audio Switchers
      February 14, 2013:   LPB 20 Watt AM Transmitter Repaired and Modified
        January 16, 2013:   "Your Scope Is a Tool for All Seasons" Article Published in Radio World


     December 31, 2012:  2012  Year End Review
     December 29, 2012:  New Telephone Interface for Digital and IP Phones
     December 27, 2012:  New RF Amplifier for Continental 802A FM Exciter
       December 5, 2012:  Del Dayton stopped by
     November 21, 2012:  Avoid Hall of Shame article Published in Radio World
         October 11, 2012:  Mark appeared on Internet Television...Again!
         October 10, 2012:  Installing Connectors article Published in Radio World
      October 9-11, 2012:  Wisconsin Broadcasters' Clinic
          October 2, 2012:  Dan Zimmerman stopped by at M. W. Persons
     September 6, 2012:  Visiting Roger Utnehmer at WBDK Radio
          August 28, 2012:  Three Continental Exciters in the Shop
          August 27, 2012:  Continental 802A&B RF Amplifier Upgrade
          August 20, 2012:  Hum and Buzz in STL Preamplifier
          August 17, 2012:  Silicon Valley 500 Watt RF Amplifier Repair
  August 10 & 12, 2012:  Visiting Clients in Southern Minnesota
              July 26, 2012:  Visit to the WHBY AM Transmitter Site
             July 20, 2012: 
Building Cooling article Published in Radio World
             July 20, 2012:  Rick Keefer picked up a Rebuilt Transmitter
           July 11, 2012:  Energy-Onix SST-30 FM Exciter Repair
           July 10, 2012:  Conditioning New Old Stock Tubes
           June 21, 2012:  Dinner with Jim Zastrow and an SBE Meeting
           June 20, 2012:  Keep That Transmitter Building Cool article published in Radio World Magazine
           May 30, 2012:  FM Transmitter picked up for Refurbishing
           May 26, 2012:  Harris 150 Watt RF Preamplifier Updated
           May 9, 2012:  Where Have All the Engineers Gone? article published in Radio World Magazine
           May 7, 2012:  Frequency agility made easier on a CCA FM Exciter
           May 3, 2012:  Broadcast Electronics AM5E transmitter cooling system improvement.
           April 28, 2012:  Harris MW-1A PA module repair page updated.
           April 24, 2012:  FM exciter from Hong Kong repaired here.
           April 23, 2012:  Meter replaced in Broadcast Electronics FX-30 FM Exciter.
           April 13-20, 2012:  Mark attended the National Association of Broadcasters annual convention in Las Vegas. 
           April 12, 2012:  Mark celebrated his 65th birthday, but is still a working guy.
           April 1, 2012:  Cycles per Second to Hertz Conversion explained.
           March 16, 2012:  Just unpacked an FM exciter from a station in Florida.  Then four more exciters arrived from a client in California.  That makes five waiting for repair bench time. 
           March 14, 2012:  "Better Living Through Tower Welding"
article published in Radio World Magazine.
           February 25, 2012:  Jim Offerdahl paid a visit bringing equipment for repair
           February 23, 2012:  Broadcast Engineer Marv Olson stopped in to visit
           February 22, 2012:  Dan Houg stopped by to pick up uninterruptible power supplies
           February 16, 2012:  WMIN 1010 AM Sauk Rapids, MN, heard in Finland
           February 8, 2012:  A visit from Steve and Barb Gretsch
           February 1, 2012: "FM Exciter Modifications and Repairs" article published in Radio World Magazine.

           January 23, 2012: New devices for remote broadcast telephones via cellular.  Tech Tips section of Max-ZII page


December 12, 2011: Christmas Letter.
October 19, 2011: "Rebuild That Relic of an AM Transmitter" article published in Radio World Magazine.
October 17, 2011: John and Nina Heltemes visit from Faribault, Minnesota.  Details

October 6, 2011:  Doug Thompson, radio broadcast engineer, stopped by to visit.  Details
October 5, 2011: "Hey, What's his at 1300 KHz?" article published in Radio World Magazine.
September 1, 2011: "How Did That Wireless Tower Get There?" article published in Radio World Magazine.

August 3, 2011: Mark is interviewed again at TWIT TV.  Details
August 1, 2011: Change of Business Plan.  Details
July 11, 2011: KEYL Radio gets a new transmitter.  Details
June 25, 2011: 540 WXYG Radio officially goes on the air.  Details
June 19, 2011: Repairs and updates to a Harris MX-15 FM Exciter.  Details
June 15, 2011: "A Mod Solves Transmitter Troubles" article published in Radio World Magazine
June 3, 2011: More custom-built equipment shipping from M. W. Persons.  Details
May 13, 2011: A Water Tower With No Adverse Effect article in Radio World.  Details
May 7, 2011: Hamfest in Duluth, Minnesota.  Details
May 4, 2011: New 25 KW FM transmitter installed at KBOT Radio.  Details
March 23, 2011: All-Station Audio Take-Over article published in Radio World magazine.  Details
March 23, 2011: Mark interview on TWiT Television 
Details
March 14, 2011: Tower vs. Tower article published in Radio World magazine.  Details

January 26, 2011: Interview on TWiT Television  Details
January 12, 2011: What's in YOUR Toolbox article in Radio World  Details
January 4, 2011: Tower light replacement in winter  Details


December 31, 2010: Year end review  Details
December 1, 2010: Blower motor replacement  Details
December 1, 2010: He's the Man in the Van article in Radio World  Details
October 26-28, 2010: Broadcasters Clinic in Madison, WI.  Details
October 15, 2010: Power generator maintenance article in Radio World.  Details
September 24, 2010: New transmitter at KBUN Radio.  Details
September 21, 2010: High voltage transformer repair.  Details
September 16, 2010: Continuing education class.  Details
September 8, 2010: Tyranny of Power article in Radio World.  Details
August 23, 2010: New transmitter installed at WBHR Radio.  Details
August 21, 2010: Chris Serani stopped by.  Details
August 9, 2010: New transmitter installed at KLTF Radio.  Details
May 21, 2010: Midwest Radio in Green Bay, WI.  Details
April 10-15, 2010: NAB Convention.  Details
March 29, 2010: WXYG Radio under construction.  Details
January 25, 2010: CCA FM Transmitter trouble.  Details
January 22, 2010: Allen Bailey visits.  Details
January 18, 2010: A Nautel AM transmitter to work on.  Details  Updated 2/18/2010
January 8, 2010: Snow in Minnesota.  Details   Updated 1/26/2010


December 21, 2009: A Gates BC-1G Transmitter to retune.  Details  Updated 2/18/2010
November 20, 2009: Pass/reject filter for WJON Radio.  Details
November 19, 2009: Michael Bovey stopped by.  Details
November 10, 2009: Emergency replacement of a power transformer.  Details
October 31, 2009: Stu and Jane Muck came to visit.  Details
October 2, 2009: Jim Zastrow visited.  Details
September 21, 2009: Garrett Wollman stopped by.  Details
August 31, 2009: 
Engine noise in GMC van radio.  Details
August 21, 2009: KNSP Radio gets a new transmitter.  Details
July 20, 2009: A Collins 820E-1A Transmitter work on Details
July 7, 2009: RF and cows Details
June 21, 2009: HD Radio Testing.  Details
June 13, 2009: Vietnam Veterans Honored.  Details
May 21, 2009: RF radiation and SBE meeting.  Details
May 7, 2009: Arbitron equipment installed.  Details  Updated 4/19/2010
April 1, 2009: 
April Fools Stories.  Details
January 29, 2009: KYCK in Crookston, MN,
gets a new main transmitter.  Details
January 20, 2009: Talked to SBE Chapter 17 about spectrum analyzers
Details


December 29, 2008: Transmitter retuned and installed at KMSU Radio in Mankato, Minnesota
December 19, 2008: KFAI in Minneapolis, MN, goes IBOC.  Details
December 9, 2008: WPPI is now WMIN Radio and on the air.  Details

December 5, 2008: New spectrum analyzer added to test equipment list.  Details
April 29, 2008: Coil Crushed in Detuning Network.  Details
February 8, 2008: Tour of Broadcast Electronics in Quincy, IL.  Details
February 5, 2008: HD Radio Class in Quincy, IL.  Details


September 14, 2007:  FMeXtra tested at WHMH Radio in Sauk Rapids, MN.  Details
September 5, 2007 Detuning another AM re-radiator.  Details
March 9, 2007: FM Antenna repaired at KSUM.  Details
December 14, 2007: 
New Station built at Blackduck, MN. Details
January 15, 2007:  Relay Box for satellite receivers.  Details


September 7, 2006:  New Tech-Tips section on this website.  Details
August 8, 2006:  Newly revised and expanded Used Equipment section on this website.  Details
April 29, 2006:  Mark spoke before the Minnesota News Network.  Details

February 2006: Paula is interviewed for Her Voice Magazine  Details


June 23, 2005:  A limited quantity of new Zercom Broadcast Products has become available.  Details
January 6, 2005:  New 1 KW AM RF Switch.  Details
January 4, 2005:  Mark gave a speech to the Lakes Country Computer ClubDetails


November 29, 2004:  Now in stock, a large selection of new and used oil-filled capacitors, dummy loads, and RF switches.  Details
April 1, 2004: Negative Electricity Discovered.  Details
February 24, 2004:  EAS Multi-Station Relay Panels.  Details


November 17, 2003:   Wind generator tower detuning project at KLOH Radio in Pipestone, MN.  Details
September 12, 2003:  Mohawk Military Reunion  Details 
  
January 10, 2003:   Water tower detuning project at KBUN Radio in Bemidji, MN.  Details


September 11, 2002: AM Expanded Band article in Radio World Magazine written by Mark Persons  Details
May 8, 2002: FM antenna article in Radio World Magazine written by Mark Persons  Details


October 2001: Radio World article by Mark Persons.  Details
June 13, 2001: A tornado takes down tower at Brainerd and knocks out power to the city for 25 1/2 hours.  Details
May, 2001, Mark Persons became a Certified Broadcast Networking Technologist with the Society of Broadcast Engineers.  He is qualified and certified to plan, build, modify, and maintain computer networking systems.
       
March 12, 2001: New Minnesota Contractor licensing
Details


August 2000: KQWB-AM Changes frequency.  Details

A bit of ancient Radio history


The stories go on and on.  Stop in again sometime.  I'll leave the soldering iron on for you. 
Mark W. Persons
  
Ham WMH

Questions?  Email Mark Persons:  teki@mwpersons.com    

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page last edited 11/21/2016