Reverend Guitars
goblin_manual.html[6/30/2015 11:38:50 AM]
1st PRE-AMP TUBE -
This is the tube farthest to the right when facing the back of the amp.
12AX7 is stock, however a 12AT7 tube may be substituted for more clean headroom.
POWER TUBES -
(the two large tubes) Use 6V6 type ONLY. Replace when amp sounds too
soft, lacks clarity and volume, or if tubes are noisy or malfunctioning. Tubes are available
from Reverend.
BIASING -
For maximum performance amp should be biased by a qualified technician when
installing new power tubes. Re-bias may not be required if replacing tubes with identical
brand and rating as old tubes. However, bias setting can drift and should be checked
periodically.
IMPORTANT NOTES:
Hum -
Some hum is normal when the VOL or REV is over 50%. This will be noticeable in a
small quiet room. However, excessive hum can be caused by electronic devices located
near the amp or on the same circuit such as fridges, fluorescent lights, computers, light
dimmers, aquarium pumps, etc. Hum can vary with different outlets, rooms or buildings.
Reverb Tank -
The reverb tank should NOT be mounted tight to the cabinet. A small amount
of freeplay is required to prevent vibration feedback.
SAMPLE SETTINGS:
• Settings are recommended for combo amp with wattage switch in high position. Low
wattage position may require increased BASS.
• Use with extension cabinet may require increased TREB and reduced BASS.
• Use at higher volume or with humbucker pickups may require reduced BASS to maintain
clarity.
• Sample settings are intended as close approximations, not exact duplications of the classic
tones listed.
