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Thermionic Culture Ltd, April 2018 

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Controls 

 

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2.1  Channels 1 to 12 

 

These channels come as fixed gain stereo pairs. Each pair 
of  channels  has  an 

on/off

  switch.  The  switch  cuts  the 

signal from the mix bus when off and the signal is present 
at unity gain, (at attitude setting 1) when the switch is on. 

 

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2.2  Channels 13 to 16 

 

These are as 

2.1

 

Channels

 but have a mono switch which 

switches to centre each pair of channels. 
 

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2.3  Attitude 

 

This  control  is  a  clone  from  the  Fat  Bustard  and  provides 
exactly  the  same  2

nd

  harmonics  as  are  found  in  it’s  big 

brother. 
Ranging  from  0.01%  to  5+%  it’s  a  very  useful  tool  to  add 
‘character’ to a mix. 
Frequency  response  is  a  little  restricted  at  high  ‘Attitude 
levels so the sound is more ‘valvey’. 

 

2.4  Air 
 
 

The ‘Air’ control provides a boost of higher frequencies  

 

( above 7 kHz ) and it peaks at around 30kHz – well above 

 

the range of human hearing. Because the sound of valves 

 

is soft rather than hard solid state the use of this can create 

 

a lovely velvety sheen to the mix., 

  

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2.5  Output Level 

 

These  controls  vary  the  signal  level  going  to  each  output 
level.  They  are  indented  pots  for  easy  recall.    Set  to  zero 
the  input  on  any  2  channels  will  equal  the  output  with 
Attitude at 1 and Output |Levels at 0 dB. 
As the Attitude is increased the gain will increase by up to 
12dB, so levels will have to be reduced.  

Содержание The Purple Bustard

Страница 1: ...THERMIONIC CULTURE IONIC CULTURE LTD The Purple Bustard vall e su111111i11g 111i cer u ith attitude OPERATING MANUAL...

Страница 2: ...remain charged even after the mains supply has been disconnected It is essential that these capacitors are discharged after the mains supply has been disconnected and the covers have been removed In...

Страница 3: ...Page 1 Introduction 3 2 Controls 4 2 1 Channels 1 to 12 4 2 2 Channels 13 to 16 4 2 3 Attitude 4 2 4 Air 4 2 5 Output Level 4 3 The Eyes 5 4 Inputs and Outputs 6 5 Servicing and Maintenance 7 5 1 Val...

Страница 4: ...vidual level control over any input The only controls are Attitude Air and Output Levels We have provided some simple but unique indication of level at the stereo output by using multicoloured LEDs in...

Страница 5: ...ng from 0 01 to 5 it s a very useful tool to add character to a mix Frequency response is a little restricted at high Attitude levels so the sound is more valvey 2 4 Air The Air control provides a boo...

Страница 6: ...al level 10 dBu upwards Obviously the higher the signal level goes the more likely it is that there will be distortion and the associated second harmonics found in triode valve output stages at high l...

Страница 7: ...onnectors are wired Pin 1 Earth Pin 2 Signal hot and Pin 3 Signal negative cold Pins 1 3 are connected by a small resistor which means that The Purple Bustard will accept outputs from electronically b...

Страница 8: ...ait for the valves to cool down a little DO NOT touch any part of the circuit board The two input valves are in screening cans on the left side of the unit looking from the front The 2 Output Valves a...

Страница 9: ...e for a load of 10k Distortion 0 025 4dBu THD unweighted 30kHz filter Maximum o p level 25dBu MOL 1 distortion The following specs are for Attitude 1 setting Noise 30kHz filter 82dBu Frequency respons...

Страница 10: ...Thermionic Culture Ltd Harlow Essex UK Tel 44 0 1279 414770 email technical thermionicculture com Thermionic Culture Ltd April 2018 Printed in UK...

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