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Frenzel Tube Amps
renzel Tube Amps
renzel Tube Amps
renzel Tube Amps
2011 Copyright by Frenzel Tube Amplifiers. All rights reserved. All designs, technical data, pictures, and information are
copyrighted and may not be reproduced without the permission of Frenzel Tube Amplifiers.
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STANDBY SWITCH – turns ON high voltage to tubes. Allow tubes to warm up 3- 5 minutes before turning to ON (up)
position. This protects tubes and lengthens tube life. Turn to OFF position(down) when amp temporarily not in use.
REAR PANEL CONTROLS:
EFFECTS LOOP – is a passive insertion point between the preamp and the power amplifier. The SEND jack is the output of
the preamp. The RETURN jack is the input to the power amp. For normal operation these two jacks are connected together
by a push/pull switch on the SEND LEVEL. To use the EFFECTS LOOP, pull the switch out on theSEND LEVEL control.
This will open the loop and allows you to insert an effects unit into the jacks. The SEND LEVEL controls the output level of
the SEND jack and can be used to adjust the level to meet the requirements of the input drive level your effect. Boost and
distortion pedals can be used in the loop, but they usually work better in the front of the amp before the preamp. This is
what they were designed for. The loop works best with studio digital effects that are designed to go after the preamp like
Chorus, Delay, Reverb, Mixer, Volume, etc. ( Only on amps with the Effects Loop upgrade.) The SEND jack can also be
used without the EFFECTS LOOP function to drive a recorder, mixer, or another amp. This function does not require the
switch on the SEND LEVEL control to be pulled out. ( Only on amps with the Effects Loop upgrade.)
DUAL SPEAKER JACKS – connects output of amp to speakers. The jacks are wired in parallel.
IMPEDANCE SELECTOR – selects the output impedance for the speaker to 4 – 8 -16 ohms. Set the switch to match the
impedance of the speaker.
POWER ATTENUATOR – Sets power level output of the amplifier.
EDGE SWITCH FOOT PEDAL JACK – remotely controls Edge switch on Presence control with a foot pedal. When the foot
pedal is plugged in the switch on the Presence control is bypassed. (Only on amps with this upgrade option.)
REVERB PEDAL JACK - remotely turns the Reverb ON and OFF with a foot pedal. (Only on amps with the Reverb upgrade
option.)
FUSE - protects the power supply. Use a 3 amp SLO-BLO type fuse only.
POWER CORD – connects amp to electrical outlet. The power cord is a three prong grounded cord. Always plug into a
grounded outlet to prevent electrical shock. The line voltage is shown over the power cord bushing. Be sure that the
voltage matches your line voltage.
TUBE LAYOUT CHARTS
CAUTION WARNING - VERY IMPORTANT! The large power tubes are removed for shipment. They are packed inside the
cabinet. There is a tube location chart on the chassis of the amp. Please take care when re-inserting the tubes to make
sure the tube guide pins are aligned with the slots in the tube sockets and that the correct tube is inserted into the correct
socket. FAILURE TO DO IS MAY CAUSE DAMAGE TO THE TUBES OR THE AMP.
