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Some tube vendors refer to their power tubes for their "break up" characteristics by labeling their 
sets with terms like: 

"

soft

"

, 

"

medium

"

 or 

"

hard

"

. Usually, power tubes labeled 

"

soft

"

 are of the 

low  /  lower  plate  current  drawing  type.

 

Many  vacuum  tube  vendors  use  their  own  numeric 

measurement  system.  Some  examples:

 

the  Sovtek

  EL84  grade  for  the  Aero

 

33

  is  an 

IP 

number

 range from 

# 12

 through # 

15

. The original Groove Tube

 rating scale for the Aero

 

33

 

would be a grade 

# 1

 through 

# 3

.    

 

 

WARNING

: 

 

Never remove any of the four EL84/6BQ5 power tubes in order to attempt cutting 

the power of the amplifier in half. The Aero

 

33

's

 

 

EL84 power tube circuitry shares only one 

cathode resistor. Removal of one or more of the power tubes will cause the other EL84

s 

to 

catastrophically malfunction and fail.  

Note

: the 12AX7 pre amp tubes in your amplifier are 

internally self biased and need no adjustment.    
 

 
Under-biased Power Tubes

: 

 

 

 
 
EL84

/

6BQ5

 power tubes that are under biased, 

(or drawing too much current)

, will usually create 

the following symptom: a low, background

 "

hum

" 

sound coming from the amp, which may get 

louder  as  time  passes.  You  should  inspect  the  plates  of  the  power  tubes 

(the  flat  grey  colored, 

metallic, square section inside the 

center

 of the power tube/s). 

Make sure your amplifier is on. 

Do not

 

confuse  the  yellow  /  orange  filament  glow  on  the  top  and  bottom  of  the  power  tubes  for  the 
center plates.  
 
If the plates  in  the center of the  tube are  glowing  a  dull 

"

red

"

  or are 

"

cherry  colored

"

  from  the 

center

,  (see  reference  photo  on  next  page)

,  then  the  power  tubes  are  under  biased  and 

must  be 

replaced with a

 

lower 

(

IP

)

 plate voltage / current drawing 

- set. If not replaced, they will fail 

and 

"

short out

"

 in short order, and the H.T. fuse will blow. Another sign of under-biased power 

tubes - the descriptive, colored lettering/labeling on the tube

(s)

 has turned a bright, frosted white 

color, or occasionally - completely burned off 

 
 

 
 
 

 
 
 
 
 
 
 
 
 
 
 
 
 

 

 
 

 
Copyright 1999-2017, Komet

Amplification. Group, L.L.C.  May not be reproduced in any form without express written consent from Komet

Amplification.  

 

Содержание Aero 33

Страница 1: ... Komet Aero 33 Owner s Manual Copyright 1999 2017 Komet Amplification Group L L C May not be reproduced in any form without express written consent from Komet Amplification ...

Страница 2: ...d in nanoseconds they can cause considerable or permanent damage to electronic equipment Electrical surges can damage electrical equipment by burning or fusing internal wires or by the gradual degradation of a device s internal components The best way to prevent damage is to unplug your amplifier when not in use NOTE Devices such as refrigerators and air conditioners require large amounts of energ...

Страница 3: ...ts have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped 12 CAUTION To disconnect the unit completely from the Mains unplug the unit Turning the power switch off does not completely disconnect the unit from the Mains 13 Do not defeat the safety purpose of the polarized or grounding type plug A polarized plug has two blades w...

Страница 4: ...uct must not be disposed of with other waste Instead it is your responsibility to dispose of your waste equipment by handing it over to a designated collection point for the recycling of waste electrical and electronic equipment The separate collection and recycling of your waste equipment at the time of disposal will help conserve natural resources and ensure that it is recycled in a manner that ...

Страница 5: ... option with most amplifiers is to roll down the treble control The treble control is passive reduces a portion of the signal so the result is a loss of gain and muddy distortion The Hi Cut feature allows you to set the preamp EQ for the right balance by darkening or brightening the overall tone without changing the basic EQ setting 5 Presence Control affects the highest frequencies in the output ...

Страница 6: ...art displays the placement of the power and pre amp tubes V1 to V7 7 Fast Gradual switch enables the musician to alter the response characteristics of the amplifier to suit their playing style A simple flip of the switch lets you choose between two different responses to your picking dynamics and guitar s volume control settings This is not an extra gain stage or gain boost circuit Instead it func...

Страница 7: ...is another excellent 12AX7 option With this factory stock tube compliment the Aero 33 sounds powerful complex and detailed The distortion is balanced and harmonically rich Please note you may find that some pre amp tubes whether newly manufactured used or even n o s may be too microphonic for the first gain stage V1 of a Komet amplifier A microphonic preamp tube is a condition in which a tube will...

Страница 8: ...chords a loss of tightness or punch a weak sounding treble and bass and loss of certain sonic frequencies or note bloom We suggest that you first start by replacing your power tubes Pre amp tubes can last a very long time and do not necessarily need to be replaced as often as the power tubes However we do recommend that you have both the pre amp and power tubes properly tested by a technician betw...

Страница 9: ...r tubes that are under biased or drawing too much current will usually create the following symptom a low background hum sound coming from the amp which may get louder as time passes You should inspect the plates of the power tubes the flat grey colored metallic square section inside the center of the power tube s Make sure your amplifier is on Do not confuse the yellow orange filament glow on the...

Страница 10: ...er cables 16 to 18 gauge is sufficient made with quality male input plugs The speaker cable plugs should be soldered directly on to the internal speaker cable wires Using a quality made speaker cable will ensure a tight fit from the amplifier s speaker jacks to the speaker cabinet Your speaker cabinet should be equipped with a quality brand input jack We prefer and use the Switchcraft 11 mono inpu...

Страница 11: ...del ALWAYS make certain that your AC power cable is unplugged when replacing any fuse Mains Fuse blowing Unplug amplifier from the wall AC Remove the power tubes see precautions section Install a new 3 Amp slow blow fuse 2 Amp slow blow 240V Plug into the wall AC and turn the amp on with no power tubes in the sockets Should the mains fuse continue to blow with no power tubes installed then your am...

Страница 12: ...f two things Under normal operating conditions this symptomatic sound can be the result of weak power tubes i e power tubes that have reached their operational lifespan You may also notice this symptom when the volume control and saturation control are completely dimed out 100 even with new power tubes This is a result of both the power tubes and output transformer reaching complete saturation and...

Страница 13: ... with us to have your amp shipped back to Komet Amplification for factory service CLEANING We recommend cleaning your head box tolex with a slightly damp warm cloth towel Please be very careful when cleaning the front panel of your Aero 33 head box The points of the plexi glass triangle Komet logo could possibly catch on a cleaning cloth We recommend that you clean the triangle Komet logo starting...

Страница 14: ...prove tremendously after being played over time The harmonic complexity will continue to improve the tone will sweeten up and become even more fluid and resonant Have fun Thank you for purchasing our product Michael Kennedy Holger Notzel Co owners Komet Amplification CONTACT Komet Amplification 1865 Dallas Drive Baton Rouge LA 70806 1454 225 926 1976 Email info kometamps com Website www kometamps ...

Страница 15: ...4 X 12 16 Ohm Speakers in series parallel for 16 Ohms Note Komet Amplification recommends using a 16 Ohm load with their amplifiers for the best sonic results Copyright 1999 2017 Komet Amplification Group L L C May not be reproduced in any form without express written consent from Komet Amplification ...

Страница 16: ...Komet Airbrake Manual Copyright 1999 2017 Komet Amplification Group L L C May not be reproduced in any form without express written consent from Komet Amplification ...

Страница 17: ...e overall sound of an amplifier The Komet Airbrake sounds very natural and transparent at reasonable levels of attenuation It allows the user to bring the level of a 50 60 Watt Komet amplifier down to that of a cranked 20 to 25 watt amplifier all the while retaining its distinct voice and dynamics It is therefore best suited to match Komet amplifiers to a smaller room or in a quieter playing setti...

Страница 18: ...6 Keep in mind that the combined load of both cabinets or both speaker loads will be 8 Set your amplifier s impedance selector accordingly to 8 Do not use two 8 speaker cabinets The combined load will be 4 which is below the Komet Airbrake 8 16 Ohm operating range For the same reason do not use two 4 cabinets Never combine two cabinets of different impedance ratings for example an 8 cab and a 16 c...

Страница 19: ...apability for the Komet Airbrake is 200 Watts under full attenuation You should not have a problem using the Komet Airbrake with a 100W amplifier but it is always best to operate your 100W amplifier and attenuator within reason Note we do not recommend adjusting the Ohm settings via the adjustable lugs located on one of the resistors within the unit They are factory set Final note The Komet Airbra...

Страница 20: ...The Komet Airbrake Layout Copyright 1999 2017 Komet Amplification Group L L C May not be reproduced in any form without express written consent from Komet Amplification ...

Страница 21: ...setting forth the name address and daytime telephone number of the owner together with a brief description of any claimed defects Parts or product for which replacement is made shall become the property of Komet Amplification The customer may be responsible for all costs of transportation and insurance both to and from Komet Amplification depending on result of inspection and validation of warrant...

Страница 22: ... amplifier We are a commercial address Please check any corresponding box on shipping label Please do not return ship your amplifier for Home Delivery service or Saturday delivery Please do not send for early morning before 9 00 A M delivery We prefer afternoon delivery Note Komet Amplification will not be held responsible for any Komet amplifier amplifier component or contents damaged or lost dur...

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