must be sent back in the original packaging or equivalent packaging. The cost of return
shipping to Science Amplification is to be paid by the owner. Science Amplification is not
responsible for damage caused in return shipping. Science Amplification will pay for the
return shipping after the warranty work is completed.
In general, we will be able to fix your amp for free, and help with tube changes, etc. if needed.
We will also be happy to modify the amp in any way possible until the amp is perfect for you.
Non-warranty repair is also available – please inquire for shop rates. Don't hesitate to contact
us!
Care and Maintenance
If plexiglass panels need cleaning, use only a soft clean, and dry 100% cotton cloth to wipe off
smudges with just a little pressure to avoid scratching. If needed dampen the cloth with a little
water, or use Novus brand plastic polish. Avoid harsh alcohol-based cleaning products as they
may cause the acrylic to “bloom.” Also avoid the ubiquitous “microfiber” cloths, which can
leave lint and/or tiny scratches the plexiglass in some cases since they vary so greatly in
quality.
Periodically check the 4 mounting screws on the bottom to make sure they are tight. These
screws secure the chassis to the head cabinet, and also insure contact to the aluminum RF
shielding plate inside the cabinet.
If possible, move the amplifier when the tubes have had the chance to cool down for a couple
minutes. Because the tubes get very hot, the elements inside become more vulnerable to
physical damage until the tubes have cooled. In general, try to move the amp off stage last.
Tube Chart
Birds-eye view of the Hellhawk's tube layout. Only replace tubes with specified types listed
below:
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