Hello everyone, this is my first post here at CBN, although I've read through quite a few threads here.

Yesterday I decided to build some surface mount piezos for an archtop I have, the plan being to wire the output to the existing one so I could blend the transducers and the p90 already installed. My problem is while testing, ( soldered to its own output jack for test purposes) the pickups are VERY quiet, I had to turn my 40A tube amp up to 100% to get loud volumes out of them, they sounded fine but are unuseable due to this volume issue. Second test, I plugged them into a di box into garage band. Again way too quiet to be useable, even with all settings maxed. (not a good start) I used small disks inside on beer caps encased in silicone, audio cable from some old pedal connector cables, a 500k pot. Another test I did was to remove all insulation from the disk and I mounted it directly to the surface of the guit. louder. but still unuseable. Any sugestions? did I chose the wrong disks? wrong pot? any help could be VERY helpful on the matter. Thanks guys/gals.

Views: 1272

Reply to This

Replies to This Discussion

here is a photo of the pickup, (no insulation on the disks) and the disks I used, beside  a dime for size ref. (10 cents canadain...)

Hope this pics work...

Attachments:

a disk piezo noisey i find ,maybe a rod piezo under the saddle be the way to go .

A rod piezo is the way forward.I`ve used them alongside single coil pickups with volume and tone pots to good effect.No issues with volume but I would certainly copper foil insulate.

Your issue, most likely, is that to play it properly (e.g., with sufficient volume) through a 40-watt amp ( or most any other amp) you need a pre-amp. You gotta boost that low voltage that a piezo generates just from string vibration bending the quartz crystal structure, to something the amp can work with. Most commercial gits that have piezos installed, even ones with rod or ribbon piezos directly under the saddle, have a 9-V battery-powered pre amp built into them, often as part of a combined tuner and EQ system. Pre amps are cheap. They can be sourced direct from China, or you can build your own. There are stomp boxes that can do this as well. There's likely nothing wrong with your discs (although you should make sure of your solder joints, just in case).

It sounds quite odd as they usually but out quite a health signal and you usually ahve to dampen them abit

hot glue on the disk is good

Is there more than one pick up in there and how did you wire them ?

I guess they could be over damped

http://darrenscigarboxguitars.blogspot.co.uk/

The closer to the bridge (where there is more downward pressure and string energy), the louder the piezo will get. Directly under the bridge or saddle would be the best spot.

An archtop bridge is a little different animal. I have an archtop I was experimenting with. I sandwiched two disc piezos in series between the saddle and the base with some cork. It seemed to work pretty well and be loud enough. You have to make the cork exactly the right height to allow some pressure on the discs. That particular archtop is acoustic, so I haven't tested putting it in a circuit with a regular pickup.

I was using typical Radio Shack piezos. Something that fits inside of a bottle cap sounds smaller than that? Where did you get the piezos?

Try a Tillman FET pre-amp.  Google it for build instructions.  You could either build it into the guitar (requires a 9v battery), or into a separate box, but in any case, blending with mag pickups may be difficult.  You may want to consider a separate jack for the piezos to go to a separate amp channel.

hey folks thanks for the replys, I assumed (wrongly) that I didnt need a preamp,when using a firewire sound interface, as if that WAS the preamp. I will probably try and build a simple preamp next. These are my first builds, and Im having a fun time doing so. Also just curious, Ive seen acoustic guitar built in preamps, but as far as pedal preamps, is this one, I know its not the most reputable brand, but they are cheap. http://www.behringer.com/EN/Products/ADI21.aspx, thanks again!

It sounds like something isn't right. Disc piezos generally have really good volume. I'm wondering if there is a cold solder joint or an almost broken wire. It is rod piezos that generally need a preamp with some gain.

When soldering, make sure your wires are pre tinned. You put a drop of solder onto the piezo disc. Then you set the tinned wire on the drop and put the soldering iron on top,of that until,the wire dropps into the solder drop. Then quickly remove the iron.

You have to be careful the solder does not go from the brass exterior to the white center.

The white center is your positive. Brass exterior is negative.

On preamps, with disc piezo they are more used for impedance matching than for gain. The discs are much higher impedance than a standard pickup. You get a much better sound.

The Tillman preamp is a classic. It only has 7 parts. You may have a problem getting the transistor for it locally. It is obsolete and not everyone carries it. There is also a quick and dirty preamp by Francis Deck. I have built this one and it works. I was able to buy all the parts locally. It only has 6 parts.

That wire doesn't look right. What guage is it. It seems way too thick. The right guage and material  makes a difference.

the wire isnt really thick at all, its just the rubber insulation, they are pedal to pedal cords...

Have you tried  de soldering the volume and testing the signal from just one of piezos ?

I would do this in this situation

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

Forum

First build in years.

Started by Cause the Blue rat in Building Secrets, Tips, Advice, Discussion. Last reply by Cause the Blue rat 11 hours ago. 55 Replies

Tuning

Started by Clyde B. Bumgarner in Building Secrets, Tips, Advice, Discussion. Last reply by Cause the Blue rat 11 hours ago. 1 Reply

The Tremoloa - History's Weirdest Slide Guitar

Started by Shane Speal shanespeal.com in Feature Articles. Last reply by Don Randolph yesterday. 4 Replies

A Young Frank Zappa Performs Music on a Bicycle with Steve Allen

Started by Shane Speal shanespeal.com in Feature Articles. Last reply by Don Randolph yesterday. 13 Replies

Amp wattage

Started by Joe Williams in Performances, How to Play, Lessons, Concerts. Last reply by Joe Williams on Monday. 4 Replies

VIDEO: The World's Most Irritating Instrument

Started by Shane Speal shanespeal.com in Feature Articles. Last reply by Titch the Clown on Friday. 19 Replies

Lace pickup prints

Started by Andries D. EKER in Building Secrets, Tips, Advice, Discussion. Last reply by Andries D. EKER on Friday. 15 Replies

Latest Activity

Jim Morris commented on Erasmo Coco's video
Thumbnail

Solstice 2 String Diddley Bow

"Happy summer to you. Sounds great!"
3 minutes ago
James Matthews commented on James Matthews's photo
Thumbnail

proj-007-01

"Found this hefty keyholder cabinet at Goodwill for $1.99.  One of the hinges is missing its…"
3 minutes ago
James Matthews commented on James Matthews's photo
Thumbnail

proj-005_006

"Found some more boxes at one of the Goodwill stores for $1.99 each.  I think they're…"
5 minutes ago
James Matthews posted photos
6 minutes ago
Jim Morris commented on Andries D. EKER's video
Thumbnail

Ripple on the Water A D Eker on Jack Daniels 3 String 2018

"Jack Daniels and ripples in the water is a good thing!"
19 minutes ago
Andy Busch commented on Rev. Todd Hanson's photo
Thumbnail

Box score!

"That one third from the left end, second row down: I just scored one of those last night. …"
30 minutes ago
Andy Busch commented on Rev. Todd Hanson's photo
Thumbnail

Fathers day1.5

"You're a good son-in-law, Rev.!"
31 minutes ago
Andy Busch commented on Dave Lynas's photo
32 minutes ago
Jim Morris commented on Richard Sundberg's video
Thumbnail

Time Portals, Machines, and Witch’s Brew

"Two witches!! What sorcery is this?? Sounds fantastic."
34 minutes ago
Jim Morris commented on James O Lunsford's video
Thumbnail

Have You Ever Seen The Rain on CBG

"Good one on a rainy day here in WV"
39 minutes ago
the anonymous pick commented on the anonymous pick's video
43 minutes ago
Erasmo Coco posted a video

Solstice 2 String Diddley Bow

Summer solstice. . Great ! Instrument built out of junk or recycled material or garbage. Call it what you want , feels like a Diddley Bow to me. It is what i...
1 hour ago

Music

Loading…

© 2018   Created by Ben "C. B. Gitty" Baker.   Powered by

Badges  |  Report an Issue  |  Terms of Service