Does anyone have a simple (audio + svideo) schematic diagram for a svideo modulator for the 264 series such as C16 and Plus/4?
I know there are some for the C64 and C128.
thanks
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letzter Beitrag von itguy am
S-Video Modulator 264 Series
- itguy
- Erledigt
-
Do you want a Replacment for the original Modulator ?
The 264 Series still have S-Video output.
The same Pinout like C64. -
What do you mean with "simple" ?
but look here:
http://www.zimmers.net/anonftp…hematics/computers/plus4/especially here:
http://www.zimmers.net/anonftp…s/plus4/c116-251239-1.gif
or here
http://www.zimmers.net/anonftp…_314001-03_(1984_Oct).pdf -
s-video is supported out oft the box at the video -connector.
There is no need for a change or and modification.
Except your modulator not working or you need a hosiden-connector. -
Do you want a Replacment for the original Modulator ?
The 264 Series still have S-Video output.
The same Pinout like C64.
Yes a replacement for the original modulator. -
But why ?
The original works fine and it makes a real nice Quality ?! -
bad modulator
sure? Never heard about a defective modulator.
Any other failures are excluded? -
Here you go:
Alles anzeigenCode- Video amp for TED or VIC-II. To be used in place of the RF
- modulator, generating better signal quality.
- Note: This circuit removes the CVBS output! It's Y/C only!
- ___ R1
- chroma in -----|___|---+ +5V
- | |
- | |
- R2 | |
- ___ | |/
- +----|___|---*----| T1
- | |\
- | R4 R3 V
- | ___ ___ |
- *--|___|--*--|___|--+
- | |
- | | || C1
- --- +--------||---------- chroma out
- GND ||
- D1 R5 +5V
- ___ |
- luma in ---|<|--*--|___|--*-------------------+
- | | |
- | | |
- | |/ === C2
- +-------| T2 |
- |\ |
- V |
- | R6 R7 |
- | ___ ___ |
- +--|___|--*--|___|--*
- | |
- | ---
- | GND
- |
- +--------- luma out
- T1 = T2 = BC547B
- D1 = 1N4148
- R1 = R2 = 510 Ohm
- R3 = 68 Ohm
- R4 = 270 Ohm
- R5 = 470 Ohm (if 6569, use 1 KOhm for TED and 8565)
- R6 = R7 = 150 Ohm
- C1 = 1nF
- C2 = 100nF
- Do _not_ use metal film resistors, keep connections short.
- luma in = pin 23 on TED, pin 15 on VIC-II
- chroma in = pin 13 on TED, pin 14 on VIC-II
- luma out = pin 1 on video output
- chroma out = pin 6 on video output
- These 2 video amps might work on other outputs if they are designed as
- follows:
- Chroma: The output is open source and should be terminated with 1 KOhm
- to GND
- Luma/Sync: The output is open drain and requires an external pullup
