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Tube Fx Loop Board

Tube Effects Loop

Details

World’s 1st sub-miniature vacuum tube Dumbleator style Fx loop. Two Models available.

This series Fx Loop utilizes a 6N17B sub-miniature military-grade, dual-triode vacuum tube. It employs high voltage, has zero-loss, is built on a PCB and includes an optional true-bypass switch.
This all tube FX loop add-on module can be fitted to virtually any guitar tube amplifier.

The FX loop is optimized for insertion between preamp and driver stages, the low noise, non-clipping, analog effects loop utilizes a 6N17B sub-miniature dual-triode vacuum tube. It is designed with a cathode-follower send stage and a return gain stage both of which can be adjusted.

The FX loop is optimized for insertion between preamp and driver stages, the low noise, non-clipping, analog effects loop utilizes a 6N17B sub-miniature dual-triode vacuum tube. It is designed with a cathode-follower send stage and a return gain stage both of which can be adjusted.
There are two versions: Standard (SFx) and TriLator (TFx). The TriLator adds frequency specific feedback on the return gain stage and is essentially the same as the famous Dumbleator used with many Overdrive Special amps.

The mounting requirements are simple (Power, Ground, Signal In, Signal Out, 2 heater wires) and it is held in place by chassis mounting the ¼” jacks.

Power drain on the B+ is minimal as the unit features a voltage regulator to minimize noise and simplify installation. This eliminated the need for a voltage dropping resistor. Similarly, heater current draw is minimal. The 2 internal trim (level) pots that can be accessed directly through the jacks (no chassis removal) or internally by using a small flat-bladed screwdriver.

The PCB footprint is small (3 holes), yet both the send and return levels, spaced at 1.5″, can be adjusted for nearly any loop requirement. Low cost stomp boxes and pedals work just as well as thousand-dollar rackmount effect units.
The Send is configured as non-interrupt, so it can be used as a Preamp/Slave Line Out. When no connection is made, the unit accurately passes signal but there is also an optional panel mounted true bypass switch.
This FX loop kit makes inserting any effect or pedal, less intrusive to the tone of your amp.

Kit includes all cables and wires plus detailed instructions and also detailed layouts for Trinity Amps products.

Pricing Options

Canadian Customers Click 'Inquire' to receive up-to-date CAD pricing and shipping. Include postal code for quote.
$ CAD
We price affordably while managing fluctuating exchange rates with our suppliers. Our CAD best price guarantee accurately reflects our costs.
Tube Fx kit
$90 USD
Tube Fx Loop with 6N17B sub-miniature, dual-triode vacuum tube.

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FX KIT

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Payments can be made through PayPal to sales@trinityamps.com. Payments can also be made using Interac e-Transfer, money order, cashier’s or personal check to Trinity Amps Inc.

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All prices are listed in US dollars. Orders ship from Brighton, Ontario, Canada, applicable taxes not included. Specifications and prices subject to change without notice.

Trinity Amps Inc.
+1-613-438-5854 Canada EST

14656 County Rd. 21
Brighton, ON
Canada
K0K 1H0