Epiphone Valve Junior Modifications
Unleash the tone of your Epiphone Valve Jr. The Valve Jr is quickly becoming one of the best selling tube amps, it has pretty good tone and the price is right. However, these amps can tend to be a bit noisy and sound a bit thin. After these mods your amp will sound fantastic, with less noise and be more reliable. After these mods the tone will rival that of boutique amps costing many times more. Your Epiphone Valve Jr may be small in size but it doesn't need to sound small.
This kit works for all versions of the Valve Jr. Both the Head and the Combo.
This kit includes all the parts and detailed instructions with photos for all the following mods.
Tone - Get rid of that thin bottom, honky mids, and lack of clarity with High Quality Sprague Orange Drop Caps and corrected resistor values for the input stage to increase the gain and minimize noise. The cathode cap is replaced to provide full tone range resulting in full low end without being flabby
Tube Bias - The preamp tube is running to cool causing the amp to sound harsh and cold, adjusting the cathode resistors let the pre-amp tube run a bit hotter for a smoother and warmer tone. The power tube is running to hot causing the amp to sound brittle, cooling down the power tube improves the tone of the amp and increases the tubes life.
Brightness - Like to play at low volumes but find the amp too dark? The brightness mod adds sparkle to your tone at low volumes. As you turn your amp up the brightness mod loses its effect so the amp never sounds brittle at high volumes.
Power Stiffening - Both the Cathode cap on the power tube and the filter cap in the first filter stage are replaced with corrected values to reduce noise, increase frequency response and increase dynamics.
Noise Reduction - Isolates the input jack from the chassis preventing ground loops. Increase the capacitance of the first filter stage by 5x reducing ripple current and noise.
Proper Lead Dress - Take a look inside a boutique tube amp and you will see all the wires carefully twisted and placed for greatest reduction in oscillation and noise. The Valve Jr has all the internal wires zip tied together. I give clear instructions on dressing the leads inside the amp for optimal performance, this results in lower noise and less chance for oscillation.
Included in the kit is all the components necessary to get your amp in top shape and the detailed instructions to make the changes easy. If you have a basic understanding of electronics and soldering skills you can do these mods in less than an hour.
"Have us Install" price includes parts and labor. We will bill you return shipping upon installation completion and which will be comparable to the cost of shipping it in. You can view USPS Parcel Select shipping rates HERE . Since we're located in the Pacific Northwest you can calculate shipping cost by how many zones it crosses to reach us from where you ship it from.
WARNING: Performing these modifications WILL void the warranty on your amplifier. Working on amps can be deadly if you do not take proper precautions. Follow these instructions very carefully. If you are at all unsure of your ability to perform these modifications STOP and take your amp to a professional to be modified. You can also send your amp to me for modification.
No Warranty: This kit and the instructions included do not include any warranty of any kind. The modifications to your amplifier are at your own risk and you agree to completely hold harmless the seller of this kit against any and all claims. Tube amplifiers contain parts that operate at very high temperatures and deadly voltages. If you are not sure of your abilities to perform these modifications then do not perform them