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Series V RangeMaster

Owner’s Manual

April 2020

7

PRODUCT PHOTOS

Rear panel of RangeMaster Gen. V

(Left) Frequency cutoff selector.

(Middle) Rotary switch transistor selector:

OC76, OC44, AC125

Gen. V RangeMasters

(Far right) Gen. III RangeMasters with

large enclosure.

RangeMaster Gen. V transistor
modules

(Left) Three individual biasing modules for
the OC76, OC44, and AC125.

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Summary of Contents for RangeMaster V Series

Page 1: ...ransistor 3 resistors 4 capacitors a potentiometer a switch and a battery That s it The Welwyn preset pot was 10K Ohms 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 The Series V HardWay RangeMaster has three PNP Germanium transistor modules selectable with a three way rotary switch on the ba...

Page 2: ...d 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 But In the summer or under hot lights the temperature rises and the gain of the tra...

Page 3: ...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 at low Boost settings Turning the Boost up just makes it noisy And louder The Ran...

Page 4: ...t of the unit when plugged into a solid state amp This is true of hybrid amps as well like the Crate Palomino or the Peavey Classic 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 V is gua...

Page 5: ... values required to bias each transistor into the middle of its range and they are individually selectable via the 3 way rotary switch on the back of the unit The frequency cutoff selector is a 3 position toggle switch also on the back of the unit which allows the user to select one of three Boost ranges Stock Wide and Full Many PNP positive ground Germanium transistors work well in the RangeMaste...

Page 6: ...Series V RangeMaster Owner s Manual April 2020 6 RangeMaster V Enclosure Layout RangeMaster Gen V component position layout Biasing Module Transistor Bias Module schematic ...

Page 7: ...RangeMaster Gen V Left Frequency cutoff selector Middle Rotary switch transistor selector OC76 OC44 AC125 Gen V RangeMasters Far right Gen III RangeMasters with large enclosure RangeMaster Gen V transistor modules Left Three individual biasing modules for the OC76 OC44 and AC125 ...

Page 8: ...Series V RangeMaster Owner s Manual April 2020 8 ...

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