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 NEW  Matt presents bias and operation data for the 6V6 tube in SE operation - 6V6 Single-Ended (SE) Ultra Linear (UL) Bias Optimization.

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It is currently 16 May 2021, 01:23

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PostPosted: 02 May 2021, 18:47 

Joined: 15 Mar 2021, 21:11
Posts: 6
5_1_21 Blog approximation of my work.pdf
Study the new way that I will build the amplifier after your comments. I'm eliminating the resistor and the capacitor between pins 1 and 8 producing a gain of 20 which is that set internally by the IC according to the author of the blog. He doesn't show your 100 uF capacitor in parallel (?) to the power and pin 6. Like you he shows a Zobel network. The in series capacitor to the speaker has a value of 250 uF instead of your 470 uF. The in parallel volume resistor with a value of 20 kOhm between the audio input and pin 3 looks like what? The PNG file that I attached? Because it has an unusual schematic symbol and both of you agree that it controls volume. On your recommendation I'll use a 470 uF capacitor in series with the Audio Out section for better bass. Also since the 9 volt battery is acceptable, I'm using just that with a 100 uF capacitor in parallel. Pin 7 (Bypass) is non-essential so I'm ignoring it or if need be I'll connect a 0.1 uF capacitor.

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PostPosted: 03 May 2021, 12:36 
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Joined: 06 Apr 2009, 10:08
Posts: 1748
Location: US Pacific Northwest
Yes. That is the minimum parts layout as detailed in the LM386 data sheet. It will work just fine.

It's all about the Glass!
Cascade Tubes Blog

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