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1. #Fender amp red knobs install
2. #Fender amp red knobs mod
3. #Fender amp red knobs mods
4. #Fender amp red knobs zip

#Fender amp red knobs install

R26 Remove and Install a 500pF SM 500v+ rated in its place and add 4.7M. 002uF CDE 6PS Increases gain and shapes dynamics more toward lead and rock tones with more depth and warmth in the coloration

#Fender amp red knobs mod

I'd say this mod is more for people who like the stock clean channel tone for indie/surf stuff and are looking for a better Drive channel and overall response.Ĭ11.

It's a bit less involved and for people that don't want to mod their clean channel, because they're pretty happy with it. Here's a different version of the mod that was applied to a similar Fender Red Knob Dual Showman Reverb Head.

#Fender amp red knobs zip

New Zip Ties applied to existing wire networks after heater wire replacement. (keep in well ventilated area until glue is cured after 24hrs) I like to use Goop or Shoe-Goo, because it holds up on the road very well at all temperatures. This will get rid of reverb noise and oscillation issues related to turning the reverb up.Ĭheck the reverb tank and hard wire the wires to the reverb transducer pins with teflon coated stranded wire of the same gauge instead of the PVC coated stuff, this will further reduce reverb noise issues.įlexible vibration dampening and securing glue applied to all new filter caps and new film caps, for structural integrity against vibration. Remove the Orange and Yellow reverb pot wires, cut the traces where pot pins are and attach shielded wires to the pot instead. Replace the Phase Inverter input grid wires with Teflon Coated 22 awg to reduce noise from the poor quality PVC coated wire. This will remove microphonics and noise related issues with the crappy PVC coated signal wires picking up EMI and creating oscillations. Replace all low voltage signal wires to preamp tube input grids on pins 2 and 7 of each preamp tube (except the phase inverter) with Canare GS-4 shielded. If experiencing channel bleed, microphonic noise or excess reverb hum, swap preamp tubes with tested good tubes and it will clear these issues up. especially near the big voltage drop resistors where a lot of heat is dissipated. Be sparing with fluid or use D100 Fader Luber to maintain motion control grease. Use DeOxit D5 Contact Cleaner (These amps are notorious for switching related issues from bad jacks)Ĭlean pots with DeOxit Fader Lube. Tighten, clean or replace bad jacks as needed. V5, V6, V10, V11 = Sino 6L6WGS (Black Plate RCA Style) Apex Matched Quad with Bias set to factory spec 40mVDC Between TP202 & TP203 0VDC Between TP201 & TP202 All controls to zero with no input signal. 12AT7WC or JJ ECC81 (Do not use Sino 12AT7 for the Phase Inverter on this amp) V1 = Sino 7025 or JJ ECC83S (CH2 Stages 1&2) V7 = Sino 7025 or JJ ECC83S (CH1 Stages 1&2) If using extension cabinets, keep 16ohm wiring. Wire stock combo speakers for 4ohm & Switch Impedance switch to 4ohm setting. R42 = Add 1000pF 1kv ceramic in parallel to this resistor to tighten drive channel dynamics and reduce noise. R30 = Install 47pF 1kv ceramic from input to wiper. R13 = Install 47pF 1kv ceramic from input to wiper. Make sure wires are tightly twisted with as many turns you can get without damaging the wire, because this will further reduce hum and vibration noise. Use solid core or stranded silver plated teflon coated 18AWG up until last power tube and then switch to solid core or stranded silver plated teflon coated 20AWG. I prefer to elevate this wiring above the sockets to isolate it. Install new isolated twisted heater wire for all tubes to further reduce AC hum/noise. R303 = 100R 1/2W CF Lift ground side and attach to DC elevator circuit between 100k and 1M R302 = 100R 1/2W CF Lift ground side and attach to DC elevator circuit between 100k and 1M Make sure 100k GND point is where R302 and R301 used to be grounded. Add 47uF 100v electrolytic cap in parallel to the 100k resistor. R131 = 12k 3W Metal Film Preamp Node C Voltage AdjustĦ.3VAC Heater Supply for Tube Filaments Hum Reduction ModĪdd DC heater elevator with 1M 1W CF attached from C306 B+ node to 100k 1W CF, with other end of 100k attached to ground. The amp stands up to high dollar boutique amps after the following mods.

#Fender amp red knobs mods

Thought I'd share some excellent sounding mods for the Fender 'The Twin' Red Knob Combo.