ARCADEFORGE / UMSA – Ultimate SCART Adapter

Connect a suitable 15 kHz RGBHV source to an RGB SCART television, with sync processing and a separate audio input.

15 kHz RGBHV → RGBS · RGB SCART · 5 V power

UMSA – Ultimate SCART Adapter

UMSA - Ultimate SCART Adapter
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UMSA - Ultimate SCART Adapter
UMSA - Ultimate SCART Adapter
UMSA - Ultimate SCART Adapter
from 29,95 EUR
19 % VAT incl. excl. Shipping costs
Case
Power Supply Unit
Power Supply Adapter
SCART RGB Cable
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Shipping time: 3-4 Days
Product no.: UMSA
Reviews: (2)


Products description

ARCADEFORGE / UMSA – ULTIMATE SCART ADAPTER

From your computer to an RGB SCART TV.

UMSA connects an RGBHV source already configured for 15 kHz output to a suitable RGB SCART television. It combines the sync signals using logic and routes separately supplied audio to the SCART connector.

01 / VIDEO

RGBHV to RGBS

The 15 kHz RGBHV signal at the VGA connector is adapted for your television’s RGB SCART input.

02 / SYNC

Select the sync polarity

A jumper lets you configure the adapter for positive or negative sync signals from your source.

03 / AUDIO

Add sound separately

The RCA inputs route audio to the SCART connector alongside the picture. VGA itself does not carry audio.

Specifications at a glance

Input
15 kHz RGBHV via HD15 D-sub (VGA connector)
Output
15 kHz RGBS via SCART
Audio
Separate RCA inputs, forwarded to SCART
Sync
Logic-based combination; jumper-selectable polarity
Power
Regulated 5 V required
Important
No conversion from 31 kHz VGA to 15 kHz

Plan your setup

What you need

  • A source that actually outputs 15 kHz RGBHV. Having a VGA connector alone is not sufficient.
  • A television with an RGB-capable SCART input and suitable VGA, RGB SCART and audio cables.
  • A suitable regulated 5 V supply. Your graphics hardware and software must support the required video signal.

Connection & setup

  1. Configure the source for suitable 15 kHz output before connecting it to the television.
  2. With the equipment powered off, connect VGA, RGB SCART and any separate audio cables.
  3. Set the sync jumper for your source, connect the 5 V supply and start the configured signal chain.

Complete your signal chain

Explore Sync Strike for the opposite signal direction

Package contents & setup requirements

Included

  • UMSA board

Also needed

  • Regulated 5 V supply
  • Matching VGA and RGB SCART cables; additional audio cable for sound
  • Suitable video source and RGB SCART television

Fits your setup when …

  • The source already outputs 15 kHz RGBHV through HD15
  • The TV accepts RGBS through SCART; UMSA does not convert 31 kHz VGA to 15 kHz

PSU, enclosure and cables are outside the basic package. Check the extras offered above.

Before you buy

Will standard 31 kHz VGA output work?

No. The source must already output 15 kHz RGBHV. UMSA is not a downscaler and does not change the line frequency.

Why is there no sound?

VGA carries video only. Connect your source’s audio output to UMSA’s RCA inputs as well.

Can I use a Raspberry Pi?

Only with suitable additional hardware and software providing 15 kHz RGBHV. An HDMI output cannot connect directly to UMSA.

Customer reviews:

 am 22/10/2026     Evaluation:

Works like a charm! The only thing that is missing is the 662 IC for 12V switching, but who really cares about that am I right? Makes the experience even more authentic. Great product!

 am 23/01/2026     Evaluation:

Got mine, doesn't work as they say, correct resolutions set up but the thing it should do, set the correct sync, doesn't work.
Mine is missing the IC2 "622" circuit so that might be the issue, have tried the contact form, but I don't get any sort of reply.


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This Product was added to our catalogue on 01/04/2021.

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UMSA - Ultimate SCART Adapter
Works like a charm! The only thing that is missing is the 66
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