Cornell Rambler 15 Owner'S Manual Download Page 3

 

 

Introduction 

 

Thank you for choosing a Cornell 

Rambler 15 / Rambler 40

 

amplifier. 

 
Your amplifier employs valve technology, and is hand built to the highest standards.  
Only top quality components are used in our amplifiers, so that you can enjoy years 
of trouble-free use. 
 
Please take time to read this manual, to ensure that you get the best from your 

Rambler 15 / Rambler 40

 

amplifier. 

 

 

Construction and Design 

 

Virtually all modern amplifiers are built using printed circuit boards, which helps to 
speed up production and keep down costs.  There is, however, one major drawback 
with printed circuits - conductor tracks that connect components together often run 
very close to one another, creating a small capacitance.  The result of this in a 
guitar amplifier is a substantial loss in both high frequency response and harmonic 
richness. 
 
Cornell amplifiers are designed to avoid this by having point-to-point wiring 
throughout.  Components are mounted onto a specially designed component board 
which is then sealed, using a conformal coating to prevent noise and the reduction 
of component life caused by moisture penetration. 
 
The hand wiring, carried out by our highly-trained staff, takes time but ensures that 
each of our amplifiers performs to the highest standards of reliability and sound. 
 
The stainless steel chassis holds our specially-designed transformers, and chassis-
mounted (rather than circuit-board mounted)  valves (tubes).   
 
Such attention to detail ensures a very close reproduction of the full harmonic 

spectrum of your guitar’s pick

-ups, resulting in a pure, natural sound that will turn 

heads at any venue and/or that records superbly. 

    

Summary of Contents for Rambler 15

Page 1: ...ambler 15 40 Owner s Manual DC Developments Musical Equipment Design Development Unit 13 Rosshill Industrial Park Southend on Sea Essex SS2 5PZ England Tel Fax 44 0 1702 610964 www dc developments com...

Page 2: ...l instructions before operating the amp WARNING To prevent damage fire or shock hazard do not expose this unit to rain or moisture No user serviceable parts inside Refer servicing to qualified personn...

Page 3: ...t of this in a guitar amplifier is a substantial loss in both high frequency response and harmonic richness Cornell amplifiers are designed to avoid this by having point to point wiring throughout Com...

Page 4: ...cing the dry signal i e the Master Volume The Output Stage The Cornell Rambler 15 has a Class A output design achieved by means of fixed bias resistors The resistance values are selected to complement...

Page 5: ...h should be pointing downward for normal use with 8 Ohms internal speakers only or 8 Ohms external speakers with the internal speakers disconnected and should be switched to point upwards for use when...

Page 6: ...m Lo 47 kOhm CONTROLS Volume Bass Treble Channel 1 Gain Volume Bass Treble Channel 2 Reverb Master OUTPUT Rambler 15 15 3 1 Watts Rambler 40 40 8 2 Watts SPEAKERS 1 x 12 Celestion Jensen Tone Tubby 2...

Page 7: ...s eight valves three pre amp valves 12AX7 ECC83 two 12AT7 ECC81 valves for the reverb two power valves EL84 for the Rambler 15 and EL34 or 6L6 for the Rambler 40 and a rectifier valve GZ34 Warning Whe...

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