These comments are from a “newbie". I am trying to get satisfactory volume from a rod piezo pickup inserted in the bridge of a licence plate CBG. The bridge is the outer shell of a barrel bolt. I have the piezo just lying in the channel; I get no where the volume as I get with a disc piezo placed within the sound box. Should the rod be fixed in the channel with something like a two pot epoxy?

Also I seem to get better results with disc piezo's when I have them connected straight thru, i.e. no volume or tone pot. The above is based on very few observations

Views: 1428

Replies to This Discussion

I cut one down for this 2 string build i did. The rod was cut down to a 1 1/4" length to work in the carved bone skull bridge. What i made up was a tester to make sure the rod is still in working order after i cut it. 2 alligator clips soldered on an input jack. I started using the 2" uke rods on my 1x2 neck width bridges. But now and then i still have to cut one for custom orders. I use a pair of sidecutters and snip the rod off on the side of it, sometimes it is necessary to take a pair of pliers and resquare the end of the rod after cutting. But i always test the rod after cutting or removing the 1/8" plug off the end of the wire. Better to make sure it`s working before sticking it in the bridge base and stringing up the build.

Here`s 2 custom rod bridges i did for a customer that wanted them to use on flat top mandolins, both have black buffalo horn saddles. The bridge bases were constructed with 3 pieces of wood laminated together with the inner piece being 1/8" thick to give the rod and saddle an exact fit.

I have tried both solutions too. The rod piezo in far weaker than the disc.

Today I tried an other solution. I cut my bridge in two.

  Strings//// 0.0787 inches of wood////  the rod piezo//// then the rest of the bridge.

The volume is higher but and that's where this piezo is not usable at all, the volume is not the same for all the strings. I would say that the middle string has some volume and the other strings are weak.

It's a lap steel guitar, the tension is high, the tail is tight, the vibration very good. So, what's wrong when it is written on the add that it's a good piezo ? !

You need very hard wood to transfer the vibration to the rod. Randys' method of using bone would be very effective as it is very hard/dense material. I've used bamboo skewers.....not as good as bone or steel, but does provide a reasonable transference of vibration/sound to the rod piezo. Average density hardwood, will dampen the vibrations to some extent.

I tried the rod piezo in the channel of a barrel bolt. It did not work even when the rod was cemented in with very dense plaster cement. I got a great result by boring a 1/8 hole down the centre of a 10 mm brass rod and inserting the piezo. It fitted very snugly. With this arrangement  the piezo was about 4 mm below the strings with a full metal connection

The whole basis of a rod piezo is it has to have pressure on it to work correctly. Unlike a disc piezo that works off vibration. So when your using the rod in a slotted bridge you need a dense material for the saddle, be it bone, exotic woods, even a brass rod. It works from string pressure on the saddle transferring the pressure to the rod.  Can`t explain it any easier....lol. just look at my photo`s i`ve made alot.

Correct :-)

Ok, I have checked.  The rod although it's brand new doesn't work. Only the middle ceramic bump reacts.

So I took an other one. It works but as the strings of my lap steel don't correspond to all the bumps, some strings have a weak volume. As the difference in volume is too big, I can't use this rod for this kind of guitar.

The wood I use is a dry, very good rose wood.

When I put the rod piezo inside the brass threaded rod bridge I didn't (couldn't) line up strings and bumps unless accidentally. It worked fine. I did not shorten the rod for a 3 string CBG. It was a licence plate resonator CBG.

You can get flexible/bendable piezo rods that have a continuous pickup surface rather than set wafers along the length like these

http://www.ebay.co.uk/itm/271089542173?ssPageName=STRK:MEWAX:IT&...

http://www.suntekstore.com/goods-15005697-bendable_piezo_cable_unde...

and so you don't have the problem of lining up the strings.

 

These give you an idea of how flexible they are

 

Piezo cable is available in the USA from "Experimental Musucal Instruments". It is sold by the inch

http://windworld.com/products-page/electronic-hardware/

RSS

The Essential Pages

New to Cigar Box Nation? How to Play Cigar Box GuitarsFree Plans & How to Build Cigar Box GuitarsCigar Box Guitar Building BasicsCigar Box Guitar Parts Store

Site Sponsor

Recommended Links & Resources


Discussion Forum

Piezo location

Started by Jack Noller. Last reply by CJWilky Mar 29, 2016. 9 Replies

Preamp for rod piezo?

Started by Mark Reaney. Last reply by Bruce Trappes Sep 27, 2015. 2 Replies

Tuneable water bottle bongo

Started by C Cook. Last reply by C Cook Jan 18, 2015. 4 Replies

Bass Uke set up?

Started by Tom Lauten. Last reply by Tom Lauten Jan 2, 2015. 2 Replies

Cable Piezo

Started by Seasick Mick Feb 10, 2014. 0 Replies

Piezo rezo

Started by Bert the Welder. Last reply by nailtown slim Dec 16, 2013. 7 Replies

Compressor for piezo

Started by Wade Aug 2, 2013. 0 Replies

Piezo forms and size

Started by Kevin M. Kraft. Last reply by HarleyTodd Jun 27, 2013. 5 Replies

PIEZOs - To Glue, or not to Glue....

Started by Keith Stanford. Last reply by Eric Johnson Mar 19, 2013. 1 Reply

Piezo for a wash tub bass?

Started by Tony. Last reply by Tony Feb 15, 2013. 6 Replies

Multiple Piezo Installation

Started by Redbelly. Last reply by Alan Jan 18, 2013. 9 Replies

Hoboking Standard

Started by Alan Jan 18, 2013. 0 Replies

Rod PiezoInside the Bridge

Started by Redbelly. Last reply by Redbelly Dec 19, 2012. 24 Replies

piezo between box and neck?

Started by matthew. Last reply by Mark Dec 12, 2012. 4 Replies

Piezos...extreme frustration

Started by Tim Fleischer. Last reply by Keith Stanford Dec 5, 2012. 9 Replies

Which kind of piezo to choose?

Started by Alan. Last reply by Alan Nov 6, 2012. 8 Replies

Sources for PVDF sensor cable

Started by Flatfish. Last reply by Randy S. Bretz Oct 6, 2012. 3 Replies

piezo on concrete block guitar

Started by Wade. Last reply by rusty case Oct 5, 2012. 2 Replies

Latest Activity

Papa D posted photos
1 hour ago
Papa D commented on Papa D's photo
Thumbnail

Lunchbox

"Also have a fender lunch pale, they have some kool one's out now"
1 hour ago
Papa D commented on Papa D's photo
Thumbnail

Ashton

"Thanx Guys, Tru Oil at it's best, love the aston box's."
1 hour ago
bemuzic commented on bemuzic's video
Thumbnail

Outtakes from a gusty busk!!

"thanks Poorness, it kept me on my toes!"
4 hours ago
BrianQ. left a comment for Jesús Pavón Díaz Pavon
4 hours ago
Poorness Studios liked Randy S. Bretz's video
4 hours ago
Jesús Pavón Díaz Pavon is now a member of Cigar Box Nation
4 hours ago
Lappy commented on Lappy's photo
Thumbnail

rezzo 7

"Thank you kindly Brian!"
7 hours ago
bemuzic commented on bemuzic's video
Thumbnail

Outtakes from a gusty busk!!

"thanks Doug and AGP, it was a pretty good day between the gusts!"
10 hours ago
BrianQ. liked Doug Thorsvik's video
11 hours ago
Taffy Evans replied to Infirmity Citrus President's discussion Is there a way to remove tobacco smell from cigar boxes?
"Haha, I recon your cigar box would smell better than your amp, especially after it warms up. Taff"
12 hours ago
Bernie Edwards liked Lappy's photo
12 hours ago

Music

© 2022   Created by Ben "C. B. Gitty" Baker.   Powered by

Badges  |  Report an Issue  |  Terms of Service

\uastyle>\ud/** Scrollup **/\ud.scrollup {\ud background: url("https://storage.ning.com/topology/rest/1.0/file/get/963882636?profile=original") no-repeat scroll 0 0 transparent;\ud bottom: 25px;\ud display: inline !important;\ud height: 40px;\ud opacity: 0.3 !important;\ud position: fixed;\ud right: 30px;\ud text-indent: -9999px;\ud width: 40px;\ud z-index: 999;\ud}\ud.scrollup:hover {\ud opacity:0.99!important;\ud}\ud \uascript type="text/javascript">\ud x$(document).ready(function(){\ud x$(window).scroll(function(){\ud if (x$(this).scrollTop() > 100) {\ud x$('.scrollup').fadeIn();\ud } else {\ud x$('.scrollup').fadeOut();\ud }\ud });\ud x$('.scrollup').click(function(){\ud x$("html, body").animate({ scrollTop: 0 }, 600);\ud return false;\ud });\ud });\ud \ua!-- End Scroll Up -->