Vintage Guitar Article "how input jacks work"

Trick #1. In the case of the #1 jack, when you do not have your guitar plugged into the amp (either jack) the “switch” is closed – since it is grounded, the amp is turned off for low noise, and no chance of runaway. The 1 meg resistor is the “grid load” resistor for the first tube stage of the amplifier.

Resistors R1 and R2 (soldered directly to the Hi input jacks) are input resistors and set the amp's input impedance but also function as the first preamp tube's grid leak resistors. Resistors R3, R4, R5 and R6 are grid stopper resistors (remove frequencies above human hearing) but also function as mixing resistors to reduce interaction between two simultaneous inputs.

JACK, 1/4", MONO INPUT, CLOSED CIRCUIT, PC MOUNT, BRITISH STYLE, EXTRA-TALL LEGS. Common input jack in certain B-52®, Epiphone®®, and other specialty brand amps. Also may be used as a replacement for the rear panel jacks FX loop jacks on the Marshall® MG100DFX and also as the speaker jacks on the MG100HDFX.

John LeVan has written five guitar repair books published by Mel Bay. His best seller, Guitar Setup, Maintenance & Repair, is a hands-on guide with a forward by Bob Taylor.John also authored PG’s Guitar Shop 101 column, hosted several PG DIY videos, and is an authorized warranty technician trainer for Taylor Guitars. To learn more about John’s repair and restoration workshops for players ...

Hi. I want to wire an extra output on my acoustic that is a direct signal from the piezo pick up so I can route this to an external pre amp. Can I just connect to the input jack of the acoustic pre amp and run the output straight from there or will this cause an unwanted feedback loop?

If your guitar amp’s speakers are wired in “series,” this means, you simply add up the ohms of each speaker and that’s your total ohm count. For example, I have two 8 ohm speakers, and if they’re wired in “series,” that means my speakers have a total of 16 ohms.

The so-called "input" jack of a guitar is actually an output jack that sends the signal from the pickups out to the amplifier. Over time, the jack itself can become loose or the wires that are connected to it can become loose as well. While replacing the jack is a simple solution, it can also be fixed, saving you the time of the replacement.

In this video, I demonstrate how to wire up the jack. ... Wiring Electric Guitar - 1 Pickup 1 Volume 1 Input Jack - Duration: 19:52. AxMax 320,988 views. 19:52.

One of the more common problems that most electric guitar players will eventually come across is a dead signal. Sometimes it might be the pickup wiring, the guitar’s circuitry or even something as simple as using a bad cable. And sometimes the problem can even stem from the output jack (sometimes wrongly referred to as an input jack), and if that’s the case then you’re in luck because ...

The various pickups, pots, switches, and caps eventually direct the signal generated by the pickups to the output jack. Diagram #13 shows a typical mono jack and how it should be connected. Diagram #14 shows how to wire a stereo output jack to turn on an onboard power source (battery) when a 1/4" mono plug is inserted.