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An on-going headache I keep coming up against is the explosive-pops and scary noises that occur from your guitar chord plug inserted into the '65 Reissue Twin Reverb or Deluxe Reverb PCB input jacks. My normal solution has been to remove the problematic jacks and wire in Switchcraft 12A or L12A open-frame phone jacks with normals, using short insulated wires. Today I found myself out of them, and, once again, tried to find a solution using the stock jacks:
Three of the four jacks on this Fender Twin I had on in the service cradle were working ok, but Normal Ch Jack #1 just would not cooperate. Removed from the PCB, as well as others that have been removed, or brand new un-used jacks, installed predominately in the Normal Ch positions just seem to have a sloppy plug fit (using Switchcraft 280 plugs), and the slightest movement of the plug/chord inserted in that jack would result in explosive scary noises.
One of my gripes on this part is the wrap-around wire 'hoop' that is pressed into the slotted grove of the mounting ground sleeve pressed into the plastic mold. I've gone to the extent of pulling on the solder terminals and folding them over a bit before soldering on the front, and making sure the rear terminals seat fully.
Playing with the Switchcraft 12A open frame jacks and comparing the force applied to the plug inserted vs that of the Fender jacks (I forget who the mfgr of these jacks is), the Fender jacks is way lower in applied force. The ID of the machined sleeve of them vs that of the Switchcraft 12A is within 0.002"....being more than tight enough, as long as there is adequate contact force exerted by the Tip Spring.
I tried cutting away enough space on the top of the jack, so I could seep in a little flux and then heat up the machined ground sleeve/hoop ground and solder those two parts together, just to see if that helped. I was still getting the same explosive sounds when the plug moved, or tapped on the plug.
I found then using a small KANT TWIST clamp to hold the back end of the molded plastic body firmly against the PCB while soldering the Tip/Normal terminals into the PCB, plus increasing the tension of the jack's Tip Spring seemed to minimize or eliminate the sloppiness, and was no longer getting chord-induced movement of the plug inserted in the jack to cause those scary noises.
Having already de-soldered, re-soldered a number of jacks into Normal Ch Jack #1, I was at the threshold of having the solder pad adhesive fail if I pursued swapping out any more jacks. But it did seem to be the clamping of the back end of the jack, and increasing the tension that solved that noise problem.
Three of the four jacks on this Fender Twin I had on in the service cradle were working ok, but Normal Ch Jack #1 just would not cooperate. Removed from the PCB, as well as others that have been removed, or brand new un-used jacks, installed predominately in the Normal Ch positions just seem to have a sloppy plug fit (using Switchcraft 280 plugs), and the slightest movement of the plug/chord inserted in that jack would result in explosive scary noises.
One of my gripes on this part is the wrap-around wire 'hoop' that is pressed into the slotted grove of the mounting ground sleeve pressed into the plastic mold. I've gone to the extent of pulling on the solder terminals and folding them over a bit before soldering on the front, and making sure the rear terminals seat fully.
Playing with the Switchcraft 12A open frame jacks and comparing the force applied to the plug inserted vs that of the Fender jacks (I forget who the mfgr of these jacks is), the Fender jacks is way lower in applied force. The ID of the machined sleeve of them vs that of the Switchcraft 12A is within 0.002"....being more than tight enough, as long as there is adequate contact force exerted by the Tip Spring.
I tried cutting away enough space on the top of the jack, so I could seep in a little flux and then heat up the machined ground sleeve/hoop ground and solder those two parts together, just to see if that helped. I was still getting the same explosive sounds when the plug moved, or tapped on the plug.
I found then using a small KANT TWIST clamp to hold the back end of the molded plastic body firmly against the PCB while soldering the Tip/Normal terminals into the PCB, plus increasing the tension of the jack's Tip Spring seemed to minimize or eliminate the sloppiness, and was no longer getting chord-induced movement of the plug inserted in the jack to cause those scary noises.
Having already de-soldered, re-soldered a number of jacks into Normal Ch Jack #1, I was at the threshold of having the solder pad adhesive fail if I pursued swapping out any more jacks. But it did seem to be the clamping of the back end of the jack, and increasing the tension that solved that noise problem.
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