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12 

LIMITED WARRANTY – 

Valid in USA and Canada only

 

 

Andrews Amp Lab Inc. warrants this product to be free of defects in materials and 
workmanship for a period of five (5) years from the original date of purchase 

to the 

original purchaser

. For subsequent owners, the length of warranty shall be for a 

period of 1 year 

from the original date of purchase

. During the warranty period, in the 

unlikely event that a defect occurs, Andrews Amp Lab will at its discretion, repair or 
replace the product at no charge to you for parts or labor. You must provide a copy of 
the original purchase receipt in order to receive warranty service. 
 
What is covered:   

  All components other than vacuum tubes and footswitches are covered for the 

periods listed above.   

  Vacuum tubes and footswitches are covered for a period of 90 days from the 

original date of purchase.   

 
What is not covered:  

  Any damage due to abuse, accident, improper AC power, lightening, AC power 

surge, flood, moisture, rain, solvents and other liquids, fire, smoke, improper 
connections, improper bias adjustment, improper service, defective tubes not 
installed Andrews Amp Lab or it’s authorized agent or normal wear and tear  

  Any amp with altered, defaced or removed serial numbers 

  Any product that has been altered or modified in any way not authorized in 

writing by Andrews Amp Lab Inc.    

  Andrews Amp Lab Inc. shall not be liable for any consequential and/or 

incidental damages. 

 
How to obtain warranty service:  Contact Andrews Amp Lab to arrange for service by 
calling 770-671-0485 or e-mailing [email protected] or check the web at 
andrewsamplab.com or andrewsamps.com for the latest contact information. After 
confirming warranty status, send or bring your amp to the location specified. If 
shipping, you are responsible for the cost of getting the amp to us and we will pay the 
return shipping costs.  
 
 
 
 
 
 
 
 
 
 
 
 

Copyright 2006 - 2012 Andrews Amp Lab Inc.  All Rights Reserved 

Содержание Para-Dyne 20

Страница 1: ...OPERATION MANUAL Head and Combo 11 03 2012 ...

Страница 2: ...2 ...

Страница 3: ... channel dynamic tone of the amp As with all Andrews amps these models are built to the highest standards of craftsmanship and are finely tuned for the ultimate tone This manual will help you to get the most from your new amp Please feel free to contact us with any questions at andrewsamps com ...

Страница 4: ...uperior tone and are rated to withstand extreme heat for high reliability Output impedance is switchable to 4 8 or 16 ohms and 2 speaker jacks are provided CUSTOM DESIGNED CHASSIS Our durable welded steel chassis is designed specifically for our amp models so that every part can be mounted in the optimal location for lowest noise and highest stability CUSTOM DESIGNED CABINET Our cabinets are speci...

Страница 5: ...properly grounded Never remove or defeat the ground pin from your power cord Always unplug the amplifier before changing tubes or fuses Use only correctly rated fuses See the rear panel and this manual for proper fuse ratings This amplifier can create high sound pressure levels Please use proper hearing protection and or maintain an adequate distance from the amplifier to avoid hearing damage Tube...

Страница 6: ...he clean channel Use it in conjunction with the bass control to balance the bass response of the clean channel vs the lead channel In general bass and or depth should be turned up for playing at lower volumes and down for higher volumes 5 GAIN CONTROL This is for adjusting the gain or overdrive of the lead channel It is used in conjunction with the MASTER VOLUME control 6 TREBLE CONTROL This contr...

Страница 7: ...turns on the main power to the amplifier Always turn off the POWER switch when not using the amp for several hours or more 12 PILOT LIGHT This light indicates when the main power is turned on For bulb replacement simply unscrew the red lens grab the bulb with your fingers push in while turning counterclockwise and release Replace with a standard 47 bulb The lens thread fits many standard lamp lens...

Страница 8: ...simplify measurement and adjustment of the idle current of the output tubes Bias adjustment is necessary whenever the output tubes are replaced See page 10 for bias adjustment instructions and precautions The adjustment control is located on the underside of the chassis near the test points 4 SPEAKER JACKS Always use the jack labeled MAIN first If an additional cabinet is to be used meaning that t...

Страница 9: ... generally not recommended for overdrive and distortion effects a Send Connect the input of your effects chain here b Return Connect the output of your effect chain here c Level Adjusts the level of the loop signal For best results first try the LOW level setting The LOW will work best for most applications The HIGH setting may produce slightly less background hiss but is only usable for line leve...

Страница 10: ...he output tubes in place and remove the tubes Install a new matched pair of the same type of output tubes that came installed in your amp i e EL34 6V6 or 6L6 3 Utilizing a digital multi meter set for DC Volts or millivolts measurement and select a range that will show 0 100 millivolts Insert the black meter lead into the black test point terminal and insert the red meter lead into the red test poi...

Страница 11: ...ey fail If you notice that your amp is gradually loosing volume headroom or punch or if you notice that low notes are sounding a little flabby it might be time for a new matched set of high quality output tubes This could happen after a several months or it might take several years depending on how much and how hard the amp is played Don t forget about biasing the output tubes Similar symptoms can...

Страница 12: ... not covered Any damage due to abuse accident improper AC power lightening AC power surge flood moisture rain solvents and other liquids fire smoke improper connections improper bias adjustment improper service defective tubes not installed Andrews Amp Lab or it s authorized agent or normal wear and tear Any amp with altered defaced or removed serial numbers Any product that has been altered or mo...

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