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



Technical Tips from Mark W. Persons

Ideas that might help you at a Radio Station

Console rebuilding

A typical view of the M. W. Persons shop.  Ideas abound when products are installed at radio stations and when they come to the Repair Shop

Always plenty to do keeping radio stations on the air.

AM Tips:
AM RF Harmonic Trap

AM RF Junction Box with Arc Gap  New 08/06/2014
AM Unipole Detuning
AM Coil Cleaning
AM Field Intensity Meter Repair
AM Receive Loop Antenna  Revised 01/06/2014
AM Receive Wire Antenna
AM Gas and Air Arc Gaps 
BE AM5E Cooling Fan Modification 
Collins AM RF Switch Repaired and Improved 
Dummy load modifications to make it safe 

Dayton Industrial AF315 Receiver Modifications
GMC Car Radio Noise
Grounding Rod/Shorting Stick for Transmitters
Harris MW-1 PA Module Repair 
Harris MW-10 Time Delay Relay
LPB 20 Watt AM Transmitter

McMartin BA-1K AM Transmitter
Metal Box for AM Tuning Components
Nautel ND1 Front Door Brace
Nautel J1000 Air Filter Cleaning 
RCA AM Oscillator Frequency Change
RF Oscillator for an older AM transmitter
F Mixing Products on AM and FM
Tower Welding
Transmitter Pass/Reject Filter
Variable Coil Repair
FM Tips:
Antenna Troubleshooting
Antenna Repair
BE FM 25T FM Transmitter Repair
BE FM 35A FM Transmitter Repair
BE FX-30 Exciter Meter Replacement
BE FX-30 Exciter Repair
BE 250 Watt RF IPA/Driver Amplifier Repair 

CCA FM Exciter Modification for Frequency Agility 
CCA FM Transmitter High Voltage Blocking Capacitor Repair
Collins/Continental 2.5 KW FM Transmitter Repair
Collins/Continental 815A 5 KW FM Transmitter IPA  Updated 04/25/2014
Collins/Continental 20-25 KW FM Transmitter Updates
Collins/Continental AM and FM Pushbutton Switches
Collins/Continental FM Transmitter Maintenance
Collins/Continental FM Transmitter IPA Drive Belt
Continental 802A FM Exciter PA Module Repair 
Continental 802B FM Exciter PA Module Repair  Updated 03/16/15
Continental 802A & B Power Regulator Upgrade  New 01/07/2014
Custom 100 Watt RF Amplifier 

Cutting Stainless Steel 
Grounding Rod/Shorting Stick for Transmitters
Energy-Onix SST-30 FM Exciter Repair
FM Interference
Filament Voltage Control Extended Range 
Harris 150 Watt RF Preamplifier Modification 
Harris 300 Watt RF IPA Amplifier Modification 

Harris FM-20K Transmitter PA Door
Harris FM-20K Transmitter work
Harris HT-5 Filament Adjust Modification 

Harris FM-25K and 35K Repairs
Harris MS-15 and MX-15 FM Exciter Updates
Harris Z10 Rectifier Module Repair 
High-Voltage Transformer Repair
Harris THE-1 FM Exciter Repair
Harris FM Exciter Power Cable
Low Pass Filter for FM Translator  New 10/01/2014
Power Connector Block Problem 

QEI Modulation Monitor Calibration
Stub Protector for FM Exciters and Transmitters

Silicon Valley 0101-500CH 500 Watt Amplifier Repair
Transmitter Power Output Chart
Tube Socket Repair
Studio-Transmitter-Link Tips:
Diversity Antenna Switch for STL Systems

Hum and Buzz in STL Receive Preamplifier 
Moseley PCL-606 STL Receiver Repair
Nicom STL Receiver Upgrade

Transmitter Building Tips:
Gate Lock Weather Covering
Transmitter Site Cooling Fan Setup
Transmitter Site Building Air Filters

Studio Tips:
Arbitron Equipment Installation
Gates Diplomat and Executive Audio Consoles

Grounding for an Arrakis 1200-10S Console
Grounding for an Arrakis 2000SCT-12S Console
Stanton C.500 CD Player Remote Control
Harris Stereo-5 Audio Console upgrade
Marti RPU Receiver Relay Modification
Power fuse fix for Radio Systems Audio Consoles
Equipment Rack Grounding
Miscellaneous Tips:
Audio RF Filter
Audio Processing Repair
CBS 444 Audimax III Repair and Modification
Frequency Measuring
Hall Of Shame
Integrated Circuit Adapter
New Old Stock Tube Conditioning Treatment 

RF Radiation Measurements
Temporary 450 MHz RPU Antenna
Trouble in a 120 VAC Plug
Trouble in a 3-phase/240 VAC fused disconnect
Standards...How would we get along without them?
Maintenance list for backup power generators

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


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page last edited 03/16/2015