Hot Tubes - Audio effect pedal Electro Harmonix - Free user manual and instructions

Product Type	Overdrive pedal (reissue of 1978 classic)
Model	Hot Tubes
Brand	Electro-Harmonix
Power Supply	9V DC (center negative), 18mA draw; can use 9V battery or optional AC adapter (50mA min)
Input Impedance	100 kΩ
Output Impedance	350 Ω to 3 kΩ (depending on VOLUME setting)
Controls	OVERDRIVE knob, TONE knob, VOL knob, TONE switch (ON/OFF), footswitch
Indicators	LED (illuminated when effect engaged)
Input Jack	1/4" audio input
Output Jack	1/4" audio output (labeled AMP)
Battery	9V battery; requires removing 4 screws to change
Dimensions (approx)	2.75" x 4.5" x 2" (70 x 113 x 50 mm)
Weight (approx)	0.5 lbs (225 g)
Bypass	True bypass (when effect disengaged)
Warranty	One year from date of purchase; online registration required
FCC Compliance	Class B digital device
Construction	Compact pedalboard-friendly enclosure
Maintenance	Clean with dry cloth; avoid moisture
Spare Parts	Not specified; contact manufacturer for service

Frequently Asked Questions - Hot Tubes Electro Harmonix

How do I power the Hot Tubes pedal?

You can power the Hot Tubes using a 9V battery (remove bottom plate) or an optional 9VDC AC adapter with center negative plug delivering at least 50mA. The pedal draws 18mA at 9VDC.

What do the controls do?

The OVERDRIVE knob controls gain/distortion. The TONE knob adjusts from warm bass to bright treble. The VOL knob sets output volume. The TONE switch (ON) enables the tone knob; OFF disables it for a more direct tone.

How do I change the battery?

Remove the 4 screws on the bottom plate, take off the plate, and replace the 9V battery. Be careful not to touch the circuit board to avoid damage.

Is the Hot Tubes true bypass?

Yes, when the effect is disengaged (LED off), the pedal is in true bypass mode.

What type of adapter should I use?

Use a 9VDC AC adapter with a center negative plug and at least 50mA current. The pedal's power jack accepts such adapters.

Can I use the Hot Tubes with a battery and adapter simultaneously?

Yes, the battery can remain in place when using an AC adapter. The adapter will power the pedal and the battery will not be drained.

What is the input impedance?

The input impedance is 100 kΩ, making it suitable for guitar and other instrument signals.

How do I clean the pedal?

Clean the exterior with a dry cloth. Avoid using liquids or solvents, and keep the pedal away from moisture.

What is covered under warranty?

Electro-Harmonix will repair or replace the product if it fails due to defects in materials or workmanship within one year of purchase. You must register online within 10 days and provide proof of purchase.

How do I contact customer support?

For USA/Canada, call 718-937-8300 or email [e-mail]. For Europe, call [phone] or email [e-mail]. Others can email [e-mail].

USER MANUAL Hot Tubes Electro Harmonix

Congratulations on your purchase of the Hot Tubes overdrive, a faithful reissue of the original 1970s Electro-Harmonix classic, now in a compact pedalboard-friendly enclosure. Since its initial release in 1978, countless musicians have prized the scorching tube amp simulation the Hot Tubes delivers. They consider the original Hot Tubes to be indispensable, so it is rarely available on the vintage market. Now there is no need to search. The Hot Tubes reissue gives you the exact same tone and drive as the original.

- CONTROLS -

OVERDRIVE Knob – Controls the amount of input gain and distortion delivered by the Hot Tubes. As you turn OVERDRIVE clockwise, the distortion ranges from mild tube-like breakup to saturated distortion.

TONE Knob – Creates a range of tones from warm bass to bright treble as the knob is turned clockwise.

VOL Knob – Sets the output volume of the HOT TUBES.

TONE Switch – When this switch is set to OFF, the HOT TUBES Tone knob is disabled, resulting in a more powerful, direct tone. When the TONE SWITCH is set to ON, the TONE KNOB behaves normally.

FOOTSWITCH and LED – The footswitch selects whether the HOT TUBES is engaged or in true bypass mode. When the effect is engaged, the LED will be lit.

INPUT Jack – This 14 " jack is the audio input for the HOT TUBES. The input impedance is 100k .

AMP Jack – This 14 " jack is the audio output from the HOT TUBES. The output impedance depends on the VOLUME setting, ranging from 350Ω to 3kΩ.

9V Power Jack – The HOT TUBES can run off of a 9V battery or you can use an optional 9VDC AC Adapter capable of delivering at least 50mA to the 9V power jack. The AC Adapter must have a center negative plug. The battery may be left in or taken out when using an AC Adapter. The Hot Tubes draws 18mA at 9VDC.

- CHANGING THE BATTERY -

To change the 9-volt battery, you must remove the 4 screws on the bottom of the HOT TUBES. Once the screws are removed, you can take off the bottom plate and change the battery. Please do not touch the circuit board while the bottom plate is off or you risk damaging a component.

- WARRANTY INFORMATION -

Please register online at http://www.ehx.com/product-registration or complete and return the enclosed warranty card within 10 days of purchase. Electro-Harmonix will repair or replace, at its discretion, a product that fails to operate due to defects in materials or workmanship for a period of one year from date of purchase. This applies only to original purchasers who have bought their product from an authorized Electro-Harmonix retailer. Repaired or replaced units will then be warranted for the unexpired portion of the original warranty term.

If you should need to return your unit for service within the warranty period, please contact the appropriate office listed below. Customers outside the regions listed below, please contact EHX Customer Service for information on warranty repairs at [e-mail] or [phone]. USA and Canadian customers: please obtain a Return Authorization Number (RA#) from EHX Customer Service before returning your product. Include with your returned unit: a written description of the problem as well as your name, address, telephone number, e-mail address, and RA#; and a copy of your receipt clearly showing the purchase date.

United States & Canada

EHX CUSTOMER SERVICE

ELECTRO-HARMONIX

c/o NEW SENSOR CORP.

55-01 2ND STREET

LONG ISLAND CITY, NY 11101

Tel: [phone]

Email: [e-mail]

Europe

JOHN WILLIAMS

ELECTRO-HARMONIX UK

13 CWMDONKIN TERRACE

SWANSEA SA2 0RQ

UNITED KINGDOM

Tel: [phone]

Email: [e-mail]

This warranty gives a purchaser specific legal rights. A purchaser may have even greater rights depending upon the laws of the jurisdiction within which the product was purchased.

To hear demos on all EHX pedals visit us on the web at www.ehx.com

Email us at [e-mail]

FCC COMPLIANCE

Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.

Modifications not expressly approved by the manufacturer could void the user's authority to operate the equipment under FCC rules