[Coco] CoCo2 Composite Boards (update)

[Zippster]

Joe,

Both video and audio are AC coupled (cap).  There’s a darlington transistor used
for amplification and it’s AC coupled both in and out, so it’s definitely buffered.

Here is the audio portion of the circuit.

< https://googledrive.com/host/0B1sgl615FlGnVVFhLTRtbVR4R2M/Audio.jpg <https://googledrive.com/host/0B1sgl615FlGnVVFhLTRtbVR4R2M/Audio.jpg>>

- Ed


> On Mar 7, 2015, at 5:58 AM, Joe Grubbs <jsgrubbs at hotmail.com> wrote:
> 
> Ed, meant to ask you, in this design how is the audio coupled? Resistor and cap, or is there some kind of buffer (simple emitter follower or otherwise) in there?
> 
> 
> --- Original Message ---
> 
> From: "Zippster" <zippster278 at gmail.com>
> Sent: March 6, 2015 8:58 PM
> To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
> Subject: Re: [Coco] CoCo2 Composite Boards (update)
> 
> Yep, that’s what I’ve been using.
> 
> - Ed
>