Sonofusion Replication and Research

[altrez]

Can anyone recommend a good audio amp for my replication?

Thank you,

-Altrez

[eternalightwithin]

A Class D amp for sure

Try one from partexpress.com

maybe this one?
Kicker 100W Car Audio Stereo Input Sub Amp with Housing

[altrez]

A Class D amp for sure

Try one from partexpress.com

maybe this one?
Kicker 100W Car Audio Stereo Input Sub Amp with Housing

Thank you I will check it out.

[altrez]

I have found an amp that will do the job:

Amazon.com: Sure 4x100W @ 4 Ohm TK2050 Class-D Audio Amplifier Board: Electronics


-Altrez

[altrez]

Amp is on its way!

Amazon.com: Sure 4x100W @ 4 Ohm TK2050 Class-D Audio Amplifier Board: Electronics

Now I was not sure what type of amp to purchases so I hope it works. I could not find any amp that said it supported Ultrasonics but I would think that as long as its a clean sine wave it should work.

-Altrez

[altrez]

I am looking at this:

20 MHz Digital Function Signal Generator SFG-2120 - eBay (item 360356119846 end time Apr-09-11 15:24:21 PDT)

Does anyone see any issues with this? Can anyone recommend a better one that's cheaper?

Thanks!

-Altrez

[altrez]

piezoelectric transducer's have arrived! I have attached a pic.

-Altrez

[citfta]

Couple of questions

Hi altrez,

I have a couple of questions if you don't mind. What frequency are the piezo transducers designed for? Most of the piezo transducers I am familiar with only put out a strong signal on a very narrow range of frequencies. Earlier in the thread someone mentioned a frequency of around 47 khz. I am not sure where they got that as I have not read all the background material yet. According to the specs on the amplifier you ordered it is only rated to 20 khz before the output starts dropping off. I am afraid that at 47 khz your output may be down to almost nothing. If you are going to be using a power amp you can probably build a small oscillator circuit that can be tuned across the range you want and then you wouldn't need that expensive signal generator. I hope I am not discouraging you. You were asking for comments and these were some of the things I was wondering about as I was looking at your thread.

Take care, Carroll

[altrez]

Hi altrez,

I have a couple of questions if you don't mind. What frequency are the piezo transducers designed for? Most of the piezo transducers I am familiar with only put out a strong signal on a very narrow range of frequencies. Earlier in the thread someone mentioned a frequency of around 47 khz. I am not sure where they got that as I have not read all the background material yet. According to the specs on the amplifier you ordered it is only rated to 20 khz before the output starts dropping off. I am afraid that at 47 khz your output may be down to almost nothing. If you are going to be using a power amp you can probably build a small oscillator circuit that can be tuned across the range you want and then you wouldn't need that expensive signal generator. I hope I am not discouraging you. You were asking for comments and these were some of the things I was wondering about as I was looking at your thread.

Take care, Carroll

Hello citfta,

Thank you so much for taking the time to comment! The ones I am using have been tested up to 74.51 kHz. I only need between 20-25 kHz so the amp should give close to full power at that frequency.

When I move deep into the larger units a yet untested area in this field I will need to build a custom AMP that does not filter any of the output.

I have thought about building a small oscillator but really need the generator for some other projects as well. Once I can confirm what I need then I can simply build one near the right frequency for my reaction chamber.

I have a function gen that goes up to 2 MHz however its a bit dodgy and I don't want to spend hours of valuable lab time working with something that could cause lots of headaches.

With that being said I would love to find a good frequency generator for a cheaper price.

Take care,



-Altrez

[citfta]

Hi again,

Would something like this work for you?

GW Instek 2 MHz Function/Signal Generator GFG-8020H - eBay (item 270727738432 end time Apr-05-11 14:41:34 PDT)

I hope that link came through ok. I just did a search on Ebay for signal generator. There are several listed there. A lot of them were under a $100.

See ya, Carroll

[altrez]

Hi again,

Would something like this work for you?

GW Instek 2 MHz Function/Signal Generator GFG-8020H - eBay (item 270727738432 end time Apr-05-11 14:41:34 PDT)

I hope that link came through ok. I just did a search on Ebay for signal generator. There are several listed there. A lot of them were under a $100.

See ya, Carroll

Hey citfta,

That is the one I have now. It works but it will not hold a constant signal for very long. And looks dirty on my Scope.

Thanks again!

-Altrez

[Slovenia]

Thanks!!

Thanks again for sharing with me Altrez!!

[altrez]

Thanks again for sharing with me Altrez!!

You are welcome if you need help with anything in sono let me know.



-Altrez

[altrez]

I received my new amp today an have a 130db circuit ready to test. I will post some pics soon. Getting very close now =)

-Altrez

[altrez]

Starting to get some parts together guys. Here is a pic of my amp. With any luck I should have the glassware in soon.

-Altrez