Model 277 M Series Euro Module

 

M-Series 277 Stereo Tube VCA/Preamp/Overdrive $380

Before Wendys were Walters “and ships were made of wood” as the saying goes…Or put another way—when Bobs & Dons were Raymonds & Laurens: the synths were wrought of glowing glass tubes and VCAs shaped the sound as well as controlled it.

Trogotronic issues the M-Series 277 with this in mind. Our design offers a high-gain Vacuum Tube Stereo VCA without sonic compromise. Tube Harmonics, Bass-Heavy Compression & Stereo Imaging are applied with 2 Discrete High-Voltage VCA Circuits.

The Model 277 Tube Analog VCA delivers:

  • 2 Tube VCAs
  • 2 CV Amplitude Inputs with Attenuator Knobs (1 per channel)
  • 2 CV Drive Inputs with Attenuator Knobs (1 per channel)
  • Ample gain for use as a Stereo External Input Preamplifier
  • Zero to +5 volt CV-Range compatible w/most LFOs, Envelopes etc.
  • Warm Tube-Harmonics
  • Compression with Low-End Enhancement 
  • Compelling Stereo Imaging
  • CV Controllable Panning
  • Pannable Stereo High-Gain Tube-Overdrive Effect
  • Warms cold digital effects & low-voltage solid-state signals
  • Included High-Current Power Supply = low impact on your rack’s “built-in” supply
  • 4 CV Lamps: 2 Blue (Amplitude A & B) / 2 Red (Drive A & B) 
  • 2 Slovakian Max. Gain, Twin-Triode Vacuum Tube run at high-voltage

Yes: “high voltage”—no small task for a euro module. Reason being: even the best euro format power supplies were never intended for providing “B+” (arcane engineer speak denoting High Voltage feed for vacuum tubes). Rather than compromise both the operating specs of the tubes & capacity of your modular’s power supply the M Series 277 includes a wall-wart to deliver both High Current & High Voltage to the valves without taxing your rack’s supply. Low voltage / low current circuits patch via included ribbon cable & use only a modest amount of power (see specs below for details). 277 provides front & rear jacks for the included supply to facilitate access from outside OR inside your rack (cuts down on added wires getting tangled with patch-cords on the frontside).

Use at the end of a patch: Rich tube harmonics & brawny compressed low-end add warmth to your cold digital effects / signals while reinforcing plastic sounding low voltage analog sound.

Use to portray mono signals as vast stereo audio panoramas: The 2 discrete channels run in parallel add depth to mono signals (patched to both inputs) with organic stereo imaging built into the circuit. The same mono signal can be dynamically panned via CV Amplitude inputs.

Use as a stereo overdrive effect: The Drive CV is discrete (1 for each channel independent of the other) so creation of dynamically panning stereo overdrive effects via CV Drive is a cinch.

Use as external input stereo preamplifier: Gain afforded by the 277 is more than adequate to make even the tiny signal of a guitar or microphone patched straight to the input scream. As a modular synth is more than 1000 times louder you may well wonder what happens when such signal is fed through the 277 with controls all set to “eleven”; Results are comparable to “Max” feeding nitrous to his supercharged steed on a post-apocalyptic Australian byway. In other words: before powering up a model 277: full-body horse-hide body-armor is compulsory!

Video Samples:

Specs:
  • Euro-Format
  • 15HP
  • Depth 2.25″ (with power cable attached)
  • +12v rail peak current 30ma; avg. current 22ma
  • -12v rail peak current 5ma; avg. current 3ma
  • 12vac supplemental high current power supply: Included
     
     

    Price: 100-120v $380 / 100-240v $400

Accessories

All Trogotronic instruments come complete with pretty much everything needed to “plug & play”. Still, herein are replacement parts should ever something go missing (plus a few extra options should ever such a fancy strike).

OEM 100-120vAC—AC Replacement P/S
for 77/177/277/676/667 $12

ECC83 High Gain x 100 per stage OEM for 77/177/277/676/667 $12

ECC81 Low Gain x 60 per stage for 77/177/277/676/667 $12

ECC82 Medium Gain x 80 per stage for 77/177/277/676/667 $12

Black Euro Bolt Set 50 or 100 from $7.50
Includes Made in USA Hex Driver Tool

Stainless Euro Bolt Set 50 or 100 from $7.50
Includes Made in USA Hex Driver Tool

Red Euro Bolt Set 50 or 100 from $20.00
Includes Made in USA Hex Driver Tool

Euro Ribbon Cable 16 Position Polarized
12″ (30cm) $4.00

OEM Small Replacement Knob
for 669/676/ all M»Series Modules $1.50

White Small Replacement Knob
for 669/676/ all M»Series Modules $2.00

Red Small Replacement Knob
for 669/676/ all M»Series Modules $2.00

Blue Small Replacement Knob
for 669/676/ all M»Series Modules $2.00

Yellow Small Replacement Knob
for 669/676/ all M»Series Modules $2.00

Purple Small Replacement Knob
for 669/676/ all M»Series Modules $2.00