Atari 400 XL – Update and Sound Question
I never owned an Atari when I was younger but always coveted a friend of mine’s unit.
So, when I has the chance to buy an Atari 400 for not too much – I jumped at it.
So – Please excuse me for being ignorant of things Atari here…
I tried to get an RF picture on the unit when I bought it and could not – I could hear the unit clicking when pressing keys – so I surmised that it was working.
I watched the you tube video from “Perifractic's Retro Recipes”
And so I purchased one of the AV mod units from the Brewing Academy – This arrived and I today looked into getting this fitted.
If you have a 400 XL, this ‘might’ be of help - Here’s what I did:
- Open the unit & disassemble – be careful not to snap the little tag at the bottom of the keyboard. Remove the power board, metal casing and take the RAM & processor boards from the main board.
So you now just have the main board
- Set the jumpers on the AV mod board to the 400 XL positions (see instructions)
- Take a piece of link wire - around 3 inches in length. Strip a few mm off each end to expose some wire. Solder one end of the link wire to the ‘inside’ leg of capacitor C187
- Remove the chip marked “TC4050BP” and put the new Video mod board into the socket.
- Put the other end of the link wire into the green connector – the outside terminal
- Then take a single phono wire – about 1 / 2 meters of cable and strip the ends to expose:
- The outer shielding – Put into the ‘Ground’ terminal – The inside terminal
- The centre Core – put into the ‘Composite’ terminal – The next one in
- Remove the RF lead from the case of the machine and put to one side.
- Then reassemble and the machine, finding a suitable path out of the metal casing and out of the back.
- This should give you perfect AV composite signal from your 400 – It did for me anyway..!
Now here’s my ignorance and the subsequent question…
Ignorant bit – I saw the speaker when disassembling the unit. I thought...
‘Ah, it’s like the BBC Micro and early spectrum. All sound output must come through this on-board speaker”
Never having owned one – I did not know. But I don’t this is the case as when playing Star Raiders it’s in silence.
I re-watched Perifractic's video and I then saw he had an additional AC Sound mod board that he purchased from Brian here an AtariAge.
I checked the packaging and I don’t seem to have been sent this board.
Here’s the question(s):
Do I need this AC Sound mod board?
Is all of the above all correct? My fitting and assumptions??
If so – Can I get one??
I’ve checked the brewing academy website an cannot see one
Is it the Audio Companion board that i need that is here:
Please advise me
PS – Does anyone have a 6 Volt power supply for an Atari 410 Program Recorder (tape deck)
(I'm in the UK)
Edited by BazWhite, Sun Apr 14, 2019 2:25 PM.