AB100 Class AB Power Amplifier

[bullittstang]

Here’s a pic of my boards. I think I have 6 pairs left

 

[RickRay]

Here is mine, pretty sure an earlier version.

 

[bullittstang]

Looks identical, except mine give the option of four 25mm dia. Caps like yours, or 2-35mm caps, easier to find in the 10k+ capacitance at 63v or 80v. To really push the limits!!

 

[Freecrowder]

Are the Prasi gerbers available?

 

[poseidonsvoice]

@Freecrowder

Post in thread 'AB100 Class AB Power Amplifier'

2021-07-28 12:40 pm

Here are some info files. for the sch and stuffing guide posted. hope its the same thing you want.

• prasi

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Posts 1121 and 1123.

Best,
Anand.

 

[RickRay]

I am building a couple of integrated amps for my kids. My plan is to use the Hypex SMPS400A400 which will put out about 62V normally on 115VAC. I will run these at 36dB gain. I am using 2SB1560/2SD2390 outputs with .39 emitter resistors. I am listing the input section transistors to find out if there is something better to use.
For Q1, Q2, Q4 I plan to use BC546
For Q7 I plan to use BC556
For Q3, Q5 I plan to use TTC004B
For Q6 I plan to use TTA004B

Does anyone have better recommendations for readily available transistors for the input section?

 

[RickRay]

Would BC639/640 be a better selection than BC546/556?