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YCS basics 50 Foot DB9 9 Pin Serial / RS232 Male/Female Extension Cable
YCS basics

YCS basics 50 Foot DB9 9 Pin Serial / RS232 Male/Female Extension Cable

Bottom line: The YCS basics 50 Foot DB9 9 Pin Serial / RS232 Male/Female Extension ($19.97 on Amazon as of 2026-10-06): 50-foot run puts serial devices across a room or in another rack from the host; main trade-off: not a null modem cable; PC-to-PC links need a separate null modem adapter.

$19.97

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By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014. For retro PC hardware and period-correct parts, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference.

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ 50-foot run puts serial devices across a room or in another rack from the host
  • ✓ Male-to-female DB9 ends extend an existing serial cable without replacing it
  • ✓ Straight-through pin-to-pin wiring matches standard RS232 extension use
  • ✓ Suits retro setups: serial terminals, external modems and console ports
  • ✓ Light gray jacket blends with beige-era retro PCs and lab equipment

Cons

  • ✗ Not a null modem cable; PC-to-PC links need a separate null modem adapter
  • ✗ 50 feet leaves a lot of slack coiled up in a desk-side setup
  • ✗ Long RS232 runs may need a lower baud rate to transfer data reliably
  • ✗ Male/female only; male-male or female-female ports need a gender changer

Manufacturer description

The YCS basics 50 Foot DB9 Serial Extension Cable gives you 50 feet of reach between an RS232 device and the port it connects to. One end has a male DB9 connector and the other a female DB9. It fits between an existing serial cable and its port, so you get a longer run without rewiring anything. This is a straight-through cable, not a null modem cable. Each of the nine pins connects to the same pin at the other end. That is the standard wiring for an extension. Use it to move a serial console, barcode scanner, UPS management port, network switch console or retro PC peripheral farther from…

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SpecPicks Verdict

SpecPicks scored YCS basics 50 Foot DB9 9 Pin Serial / RS232 Male/Female Extension… using a rating × review-volume × price-fit model applied to published specs and reviews across the cables & connectors category. YCS basics's cables & connectors lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for cables & connectors of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

Is this a null modem cable?

No. The YCS basics cable is straight-through, so each of the 9 pins connects to the same pin at the other end. It extends an existing serial connection and does not swap the transmit and receive lines.

Can I use it to connect two computers over serial?

Not by itself. Two computers or two DTE devices need crossed transmit and receive lines. Add a DB9 null modem adapter at one end, and this 50-foot cable then works as the long run between the machines.

What connectors are on each end?

One end has a male DB9 (9-pin) connector and the other has a female DB9 connector. That lets it plug between a standard serial cable or device and its port.

Will it work with a retro PC serial modem or terminal?

Yes, if the device and the PC both use DB9 serial ports and the device normally connects straight-through. Older hardware with DB25 serial ports needs a DB9-to-DB25 adapter on that end.

Does a 50-foot serial cable slow down data transfer?

RS232 signals weaken over long runs, especially at high baud rates. If you see dropped or garbled data over the full 50 feet, lower the baud rate on both devices. Check your device's documentation for its supported range.

Key Features

  • 50 feet long
  • Light gray
  • One male connector
  • One female connector
  • Straight through (not a null modem cable)

Full Specifications

BrandYCS basics
ColorGray
Gauge28
ModelPCELPN-53973186
Cable TypeSerial
Item ShapeRound
Unit Count1 Count
Part NumberD9MF50-B
Connector TypeSerial
Number of Pins9
Special Feature28 AWG
Connector GenderFemale, Male
Compatible DevicesModem
Indoor Outdoor UsageIndoor, Outdoor
Customer Package TypeStandard Packaging
Connectivity TechnologySerial Port
Recommended Uses For ProductComputer lab industrial
Other Special Features of the Product28 AWG

Ready to buy?

YCS basics 50 Foot DB9 9 Pin Serial / RS232 Male/Female Extension Cable is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $19.97

*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.

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YCS basics 50 Foot DB9 9 Pin Serial / RS232 Male/Female Extension Cable
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