|Instructions for replacing strings and dealing with buzzes|
Eventually you will have to replace a broken string. It makes sense to have a few extra strings on hand in case one breaks. If you aren't aware of what string gauges are on your instrument and you've lost your tuning/string gauge chart, you can click on the link to the left to download your tuning chart and prices for complete sets of strings. I offer replacement strings for all hammered dulcimers but you'll need to determine the sizes of which ones you'd like to replace. Go here if you need help sorting that out.
Fortunately strings don't break all that often. The steel strings rarely break just the occasional high note. The brass or phosphor-bronze is another story. It is considerably more fragile and at higher tension. The wound strings don't usually break but go dead a little sooner.
On the steel courses I sometimes use a continuous length of wire unless you specified all loop end strings. On new instruments, I now install all loop end strings.
The following procedure is for a continuous piece of wire
For loop end strings
You'll need two strings per course. Restringing with looped strings is nearly the same (see above) only you are not winding the wire around the hitch pins merely placing them over the hitch pin. I recommend using masking tape to hold the looped end on the hitch pin while you attach the free end to the tuning pin. Run the free end past the other tuning pin about an 1 1/4" and cut it to length and then follow the instructions in the previous section. Make sure you thread the string through any holes they need to go through before tightening.
Replacing a string on the top end small offset bridge (the 3 courses on the 3/13/12, 3/17/17, 3/16/15/8 , 3/16/18/9, and the Linear Chromatics) takes some special attention. Note carefully how its neighbor is strung. Make sure you thread the wire through the appropriate hole on the main treble bridge before attaching one end of the wire to the top tuning pin of the pair. Than wind the string around the single hitch pin on the small hitch bridge. Secure this wind with a piece of masking tape forced down hard so it doesn't just pop off. Than thread the free end through the main treble bridge before attaching it to the lower tuning pin. Increase tension on the course slightly but before tightening take a small screw driver or your fingernail and push the string downward to the bottom of the hitch pin where it winds around that hitch pin. This will insure that the course makes good hard contact with the small metal saddle. If it doesn't make good contact the course will sound thin. On the upper courses of the Linear Chromatic's left hand treble bridge you must make sure that the wire is pushed down to the bottom of the tuning pin so it makes good contact on the left hand low bridge. This treble 2 bridge gives you notes on either side so you will have to have good contact on the saddles on both sides if you want two good notes.
Replacing strings if you have dampers
Replacing strings if you have dampers is a whole lot easier if you remove the damper flappers and set them to the side. To accomplish this unscrew the screws that hold the bottom pillow block . Holding the damper in place, carefully remove the screws from the lower pillow block. Than, with control and holding onto the lower pillow block, slide the tube end out of the hole in the top pillow block keeping the pillow block assembly (tube, flapper and lower pillow block) together. Let the flapper rotate in your hand to take the tension off the spring.
Don't let the pillow block or damper flapper strike the instrument as it rotates. You don't have to remove the top pillow block. You won't be able to take the flappers far from the instrument unless you remove the attached cord but if the cord shows a lot of wear, you may want to cut and replace the cord.
Reinstalling the damper and lower pillow block is all those steps in reverse. Slip the top end of the tube into the top pillow block. Rotate the tube/flapper until it rests on the stop pin located on the top pillow block. This will set the proper amount of tension or pre-load on the spring. Once the tension has been set place the bottom pillow block over the screw holes and reinsert the screws. Make sure the end of the screw goes in the pilot hole on the instrument. You know you've done it right if the damper is being held in the up position by the spring and it rotates on its axis.
Replacing all your strings
Remove all strings by backing out the tuning pins and pulling the ends through the holes with a cutter or needlenosed pliers. Remove all acetal rod keeping it in order. Remove bridges. Clean bridges and instrument using a small paint brush to get dust between pins. Adjust depth of tuning pins so that only about 1/8" of thread is showing above the face of the instrument. The tuning pins are fine threaded screws and act like them. Clockwise will screw them in and vice versa. Began stringing using proper guages of wire following instructions on replacing a string. The loop end can be held in place by piece of tape pressed on top the hitch pin. Leave strings a bit loose until you reinstall your acetal rod rotating it one quarter turn on the treble bridge. Tighten a top course, a middle course and a bottom course on both the treble and bass bridges. Use those courses to make sure you have that bridge located in the proper position to obtain the fifth interval. An electronic tuner can help with this. Adjust placement of bridge so there is clearance for all courses. Once the intonation and clearance is OK tighten and tune all strings. Your done.
|Before you ever began searching for buzzes or anomalies make sure your instrument is in excellent tune. Sometimes what can sound like a buzz is just two strings in a course which are not tuned in unison. Once you are satisfied that the instrument is in excellent tune and you still get what you consider buzzes proceed.
99% of all buzzes on my instruments are caused by insufficient string contact on the 1/8" diameter plastic (acetal) or metal saddle running in the groove on the long narrow bridge on the right side of the instrument. The usual problem strings are the tails of strings coming off the bass bridge. This tails aren't played but they can either buzz or vibrate sympathetically when notes you usually play are struck.
Locate the offender by striking the suspected course vigorously with your left hand while your right hand attempts to mute the buzz by pressing downward with a finger along that saddle. This can be difficult if you have dampers. You can also use masking tape to selective dampen tails. The buzz is usually caused by a string tail which is neither down hard on the saddle or clearly off the saddle. The string is hovering close enough to the saddle so that when the course is struck it buzzes against the saddle. The solution is to loosen the tuning pin and string enough so that you can rewind the string closer to the bottom of the tuning pin (to make greater contact with the saddle) or rewind the string slightly higher on the pin which would lift the string clear of the saddle. Either way you should have eliminated this type of buzz. You may have to check all the courses before you find the offending string as sometimes you will strike one course and the buzz will actually be the tail of another course.
Sometimes buzzes may occur because a bridge (or the string) shifted and the string rattles against a bridge when struck hard. To eliminate these first just try and move the string to the side. If that doesn't work your going to have to tap or move the bridge slightly using a sawed off pencil with the erasure end againest the bridge. Move the bridge just enough to give the vibrating course clearance. Make sure you don't move the bridge so much you cause additional problems or buzzes
Occasionally on my larger instruments the wound strings may have become too close together so that when struck hard they literally bang into each other. If that seems to be the case separate the individual strings in the course. If the strings won't maintain that separation you can put just a slight groove in the top of the saddle with a knife or sharp file. Don't go too deep or you'll kill the tone of the string. Do not groove the treble bridge saddle as this will affect the fifth interval. Sometimes its a simple matter of just pushing the strings apart with your finger.
Buzzes or unexplained rattles can sometimes be caused by something that is vibrating in sympathy with a course that is being struck. This could be almost anything from a damper part to a loose knob on a stand. You have to think outside the box to locate these guys.
Some people don't want to hear anything sympathetic so they'll weave small pieces of leather or felt between the two strings in the course effectively damping all tails and anything that could potentially vibrate in sympathy. I don't recommend doing this as I really think the tone of the individual courses benefits from having a freely vibrating tail but that decision is yours.
Instructions for shipping your instrument (for major string replacement)