View source for Hirose 7-pin DUB

The '''Hirose 7-pin DUB''' connector (also called '''locking 7-pin DIN''' or '''7-pin DUB connector''') is a circular locking connector manufactured by Hirose Electric, used on U-matic VTRs and some professional S-VHS equipment for carrying [[Y/C DUB color-under]] signals.

== Overview ==

The connector features a locking ring mechanism similar to a BNC connector, providing a secure connection resistant to accidental disconnection. It carries separated luminance and chrominance video signals at color-under frequencies, along with sync and framing pulse signals.

The Hirose 7-pin DUB connector is found on most U-matic decks as "DUB IN" and "DUB OUT" ports, enabling direct machine-to-machine dubbing and connection to time base correctors without the signal degradation introduced by composite encoding and decoding.

== Part Numbers ==

{| class="wikitable"
! Part Number !! Type !! Usage
|-
| RM12BPE-7P (71) || Male plug || DUB OUT (on VTR)
|-
| RM12BPE-7PH (71) || Male plug (right-angle) || DUB OUT (on VTR)
|-
| RM12BPE-7S (71) || Female socket || DUB IN (on VTR)
|}

== Pinout ==

{| class="wikitable"
! Pin !! Signal !! Description
|-
| 1 || Y || Luminance
|-
| 2 || C || Chrominance (color-under frequency)
|-
| 3 || GND || Ground (Y)
|-
| 4 || GND || Ground (C)
|-
| 5 || Sync || Composite sync
|-
| 6 || CF || Color framing pulse
|-
| 7 || GND || Ground (Sync/CF)
|}

Note: Pinout may vary between manufacturers. Some early JVC S-VHS equipment used the same physical connector with a different pinout for standard-frequency Y/C signals.

== Compatible Equipment ==

The Hirose 7-pin DUB connector is found on:

* Most Sony U-matic decks (VO-5800, VO-5850, BVU-series, etc.)
* Some JVC professional S-VHS decks
* Time base correctors with DUB input support (DPS-295, FOR-A FA-300, etc.)
* Transcoders such as the [[Digital Processing Systems DPS-210]]

== Sourcing ==

The connectors are still manufactured by Hirose Electric and available from electronics distributors such as Digi-Key and Mouser. Pre-made DUB cables with genuine Hirose connectors are available from specialist suppliers.

== See Also ==

* [[Y/C DUB color-under]] — Color-under Y/C signal format
* [[Mini-DIN-4]] — Standard S-Video connector (4-pin)
* [[S-Video (Y/C)]] — Standard Y/C signal format
* [[BNC]] — Common professional video connector

[[Category:Connector types]]