Has anyone tried the KA2206 for a small amplifier?

Datasheet:  http://pdf.datasheetcatalog.com/datasheet/SamsungElectronic/mXvvrus.pdf

Thanks for the replies. The info was very helpful!

I am repairing a Laney HCM30. Since the circuit board is the same as the version with reverb, I thought I would go ahead and add the reverb.  The service diagrams can be downloaded here: https://elektrotanya.com/laney_hcm30r_sch.pdf/download.html

The reverb tank shown in the Laney diagram is BB3E1B. It doesn't say whether it was a type 1 or type 8, however. I'm guessing it's a type 1. A google search of that tank gives zero results, and there seem to be no tanks with that same code available online.

Here are some questions:

1. The input and output impedances between a type 1 and type 8 with "BB" are:
Type 1   input 150 ohms, output 2250 ohms
Type 8   input 190 ohms, output 2575 ohms

How critical is it to match those impedances? Can a type 8 be used in place of a type 1?

2. From the Accutronics web site, in the digit for the connectors,  "E" means there is "No Outer Channel". (This is the same for both type 1 and 8.)  How critical is it to find a tank with that digit?

3. For the connectors digit, how critical is it whether the input and output is grounded or insulated? Can I substitute one of those for a tank with "No Outer Channel"?

Thank you.

Oops, sorry about it being so huge. Thanks for the re-size.   

Here's the schematic minus the power supply. Comments, critiques, suggestions all welcome. 

One question - how do I determine the current requirement for the power supply? (I plan on using an unregulated power supply.)

Quote from: J M Fahey on October 08, 2010, 07:34:54 PM
To make a long story short, 2003 (and 2009) is optimized to the max for 12.6V, sacrificing some little details; while 2005 and others (2006/30/40/50/52)  work better with higher voltages, because they are "big op amps",  which 2003 and 2009 are not.

Not sure about the 2009 being optimized for 12.6V. The data sheet shows electrical characteristics given for Vs of 24V and 18V. I'm basing the design on a supply voltage of 24V. I came up with a JFET preamp using a J201, and am working on the power supply. Hope to have a schematic up in a day or two.

JM and DJ,

Thank you for taking the time to reply. The amp project is in the research stage and your posts have been helpful.

Thanks again.

Thanks, DJ,

I did understand which pots did what, but the fourth connection on the vol pots had me scratching my head.

JM,

I took a look at the datasheet for the TDA2005 and it has basically the same circuit as the TDA2003. However, I have a question regarding the potentiometers, P3 and P4, from the TDA2005 figure 27. Those look like volume controls, but I don't understand why the schematic shows 4 connections. (Same situation exists in the TDA2003 schematic.)

Thanks again for your help.

Thanks for the reply and the links, JM, they've been helpful. I am looking at keeping the project to about 10 Watts and is designed to drive 4 Ohm speakers.

Greetings from a complete guitar amp noob.

Has anyone used a TDA2009A chip for a guitar amplifier? I searched the forum with no results. Here is the datasheet:

http://pdf1.alldatasheet.com/datasheet-pdf/view/25041/STMICROELECTRONICS/TDA2009A.html

Figure 13 is a schematic for a 10W amplifier. It calls for 4 ohm speakers, and I just happen to have a pair.

Also, will I need a pre-amp with this?

Thanks for any help.