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- Short: Increase audio output of standard amiga audio device
- Author: cyborg@eanet.de
- Type: hard/misc
-
- This small piece of hardware will in/decrease your amiga audio output.
- Or any other audio source.
-
-
- What does it cost?
-
- Peanuts! In germany the parts cost app. 2,20 DM = 1,10 Euro or 1$ US
-
-
- You need: 1x TL072CN ( or better , but then the layout has to be changed! )
- 2x 1M variable resistors ( small [same size of the TL072CN] )
-
- some small cables
-
- you will find a layout inside the archive.
-
-
- WARNING: If anything breaks, don`t ask me, it`s allways your fault!
-
-
- 2.Warning: This is only a SIGNAL-AMP! Not a POWER-AMP!
-
- this means, the cuircut should only be used between the
- normal amiga output and an external HIFI-AMP!
-
- What you should NOT do!
-
- Do not connect a speaker directly to the device, you can blow up
- the device and your amiga power supply! It`s a Signal-AMP !
-
- What it does:
-
- It (normaly) increases the amiga audio signal. It`s channel independent,
- you can change the ampvalue with the resistors.
- If your are nuts, you use this device to decrease the output signal, but
- that`s really nuts!!
-
- How to adjust the volume:
-
- The resistors have to be in the middle position. That`s a ampvalue of 1:1,
- which means , that you won`t get any change to the volume.
-
- Dependent of how you connected the resistors you get a louder output in one
- direction and a less louder output to the other. It`s a none linear
- loudness change, so don`t wonder if nothing happens if you change it only a
- bit.
-
- How to connect:
-
- In a tower it`s easier because most tower-rebuilds have a normal pc-powersupply
- where you can easyly get your +-12V and 0V. in a normal Amiga you have to
- connect it internal to the main power connector. You have to be carefull
- there! If you don`t which pin has which voltage look into the A500!
- UserGuide. You will find a layout of the connector which HASN`T changed
- on the A1200. It`s still the same layout.
-
- I already had to seperat audio cables in my tower, so i used them from the
- chinch connectors to the device and plug the device directly to my tower
- audio-connectors.
-
- YOU CAN cut the connection on the mainboard or in the connectors before
- they go out of the Amiga and "solder the device to the mainboard" But thats
- not recommend. I would buy a "digitial"-audiocable (it`s noisereduced, don`t
- ask!, just buy it. costs 100% more, but you need only inches ) and some
- chinch connector and but it external, so that it could be removed or reused
- it i.e. your CD-Drive!.
-
- Why did I do it?
-
- Because the signal level of the amiga was so low that everytime i changed
- to tape or cd at my tuner i has to change the loudness controll.
-
- AND , mostly :
-
- If i`ve watched cdiwith the amiga, i had to turn the tuner to max. loudness
- to hear the silent parts. Now i don`t need it anymore.
-
-
- ============================= Archive contents =============================
-
- Original Packed Ratio Date Time Name
- -------- ------- ----- --------- -------- -------------
- 1600 517 67.6% 28-Aug-00 10:05:10 tl072CN.iff
- 2999 1438 52.0% 28-Aug-00 12:09:22 tl072CN.readme
- -------- ------- ----- --------- --------
- 4599 1955 57.4% 28-Aug-100 19:27:16 2 files
-