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Series III RangeMaster 

Owner’s Manual

 

 

November 2016 

 

PRODUCT PHOTOS 

 

RangeMaster Gen. III 

Note Welwyn-type isolated 

potentiometer. 

 

 

 

 

Summary of Contents for RangeMaster III Series

Page 1: ...sually a Mullard OC44 or NTK 275 or a Mullard OC 71 The circuit consists of 1 transistor 3 resistors 4 capacitors a potentiometer a switch and a battery The Welwyn preset pot was usually 10K or 20K The boost knob was scratchy when adjusted due to the DC voltage present on the pot This is the way the original was designed it is normal for this device With one exception the Series III HardWay RangeM...

Page 2: ...tery and a dead battery and ensures that you will get optimum performance of your RangeMaster throughout the life of the 9V battery A 9V wall wart supply is not an option this is a PNP device Almost all stomp boxes are NPN They hate each other Germanium transistors are temperature sensitive I bias the transistors at 70 degrees F In the summer or under hot lights the temperature rises and the gain ...

Page 3: ...amp The switch can be noisy when turned on pop and was not really meant to be switched on while playing you either played with it ON or OFF no switching during a solo The Boost control is sensitive and as mentioned earlier scratchy so it too was meant to be set at the sweet spot and then left alone Some nice distortion gain and harmonics are evident even at low Boost settings Turning the Boost up ...

Page 4: ... you won t get the best performance out of the unit when plugged into a solid state amp I hope you have many years of enjoyment with your RangeMaster If you have a question or comment you can always reach me through contact info at hardway vintage com or email me at d hayward hardway vintage com Thanks again and Best Regards Don This RangeMaster Series III is guaranteed to be free from manufacturi...

Page 5: ...vember 2016 5 SCHEMATICS 1966 Simplified RangeMaster Schematic Left The 3K9 resistor Re and the 68K resistor Rb are adjusted in resistance until the Germanium resistor is operating in the middle of its range Cartoon Pencil drawing of circuit ...

Page 6: ...Series III RangeMaster Owner s Manual November 2016 6 PRODUCT PHOTOS RangeMaster Gen III Note Welwyn type isolated potentiometer ...

Page 7: ...Series III RangeMaster Owner s Manual November 2016 7 ...

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