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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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
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:
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especially here:
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or here
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I know about those ones, but they are not svideo. Those are a rf modulator. I do have a service manual for C16 and Plus/4
I am only after a schematic diagram for a svideo modulator for the 264 series, so that I can replace the rf modulator with a svideo modulator.
An example is the Super Video modulator from 16x8 for the C64C/128 similar to
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Simple means just the basic features.
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
bad modulator
sure? Never heard about a defective modulator.
Any other failures are excluded?
yes. it is definitely a bad modulator.
That is the reason why I want to replace with a svideo modulator.
Here you go:
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
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Thanks. I will try it.