I did a full electrical restoration of this vintage Silvertone guitar amp for my close friend. Silvertone was a brand manufactured by Danelectro and sold at Sears. This amp is a 10-watt 1x12" with 2 12ax7 preamp tubes, and 2 6v6 power tubes. One 12ax7 is for the guitar channel, while the other is for the microphone channel. When I received it, the tubes had been recently replaced, and it would produce sound, but was very muffled. The tremolo circuit also didn't work at all. I began by disassembling and cleaning the cabinet, vacuuming out the debris from the inside, and then removing the control panel. I sprayed Deoxit through all the pots and jacks and wiped the jack contacts with q tips. This eliminated most of the crackling and left the pots feeling smooth. However, it did nothing to improve the tone or repair the tremolo. The next line of attack involved replacing all of the capacitors, which are prone to failure with age. I went through the whole amp and recorded all of the capacitor values and purchased suitable replacements. This was my first time working with something that is wired entirely "point-to-point" style without a circuit board. This makes it a bit more challenging to translate the schematic to the physical locations of the components. In this case, I was simply swapping capacitors one at a time, so it was still very straightforward. The new caps brought some brightness and clarity back to the amp, but did not bring the tremolo back to life. Luckily, I was able to find the schematic for the amp online. This allowed me to check the values of the resistors in the tremolo circuit with a multimeter, as some of the resistors were deteriorated to the point that I could not be certain what their original values were by looking at them. This is where the point-to-point wiring system proved challenging. The physical layout looks nothing like the schematic, but after comparing components, I eventually got acquainted with the circuit. The most obvious culprit was a 1M ohm resistor which was reading closer to 10K. Because resistors are inexpensive, I decided to replace all the resistors in the tremolo circuit for good measure. This put the tremolo back in action! Another crucial safety upgrade is to ground the chassis and install a grounded 3-prong power cord. The original came with a simple 2-prong power cord with an affectionately nicknamed "death cap" that hopefully explodes instead of sending you to the hospital in the event of an electrical fault. Thankfully, grounded cords are widely available at hardware stores and easy to install. This ensures a direct connection between the metal amp chassis and the earth ground. All that was left was to upgrade the speaker. The original paper cone speaker had seen better days, especially after spending over a decade in the Houston humidity, and had torn. I sourced a 30W Celestion G12L-30 speaker secondhand, which dropped right in beautifully. This speaker should allow the amp to be pushed to its limits with no fear of it burning out. My friend wanted to keep the worn-in appearance of the amp as-is, so no repairs were done to the cabinet or grill cloth. I am happy to see this old beast back in action!