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USB to 9 pin com port adapters
Author Post

Jamie, GW7SMV

Wed Dec 28 2011, 09:41AM
hi , I've a new PC for the shack but its only got 1 9 pin com port.
I need another 2 com ports so can anyone recommend some USB to Com Port adapters that work ok ?
Its a small form factor PC so it also takes half size pci cards too.
73
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Dai, G8FXM
Wed Dec 28 2011, 11:43AM
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Registered Member #2
Joined: Mon Mar 17 2008, 06:10PM

Posts: 204
 Try eBay for a dual serial port card. I bought one a while ago and when inserted it gave me two addittiinal com ports. You can if course put two cards in if you have enought soared slots and gain 4 additional ports.
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Jamie, GW7SMV
Thu Dec 29 2011, 10:19AM
Jamie, GW7SMV
Registered Member #197
Joined: Mon Apr 07 2008, 10:41AM

Posts: 13
 cheers
forgot to mention that I've installed W7 64bit.
so may have a problem with an older card for drivers
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Dai, G8FXM
Fri Dec 30 2011, 06:46PM
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Joined: Mon Mar 17 2008, 06:10PM

Posts: 204
 I've done this with Vista without any driver issues, just plug an play, but I did install the drivers that came with the card just in case. There are 4 port serial cards out that if you need it. If you cant find a supplier let me know and I'll forward the supplier I used. Just PM me or email to
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Ian, G5WQ
Sun Jan 08 2012, 08:32PM
Ian, G5WQ
Registered Member #81
Joined: Sun Mar 23 2008, 07:57PM

Posts: 29
 hi jamie , ZL is still looking for GW



if this pcb physically fits in the case and into a pci slot you could cut the metal support in half if reduced size is needed , it uses a ribbon for one socket .

or get usb adapters like one below , pricey .





or these



if running digi interfaces etc might be worth swapping to a G4ZLP USB MINIPRO , see website ZLP electronics

73 ian
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Jamie, GW7SMV
Mon Jan 16 2012, 11:36PM
Jamie, GW7SMV
Registered Member #197
Joined: Mon Apr 07 2008, 10:41AM

Posts: 13
 Thanks Ian,
yes went for the usb to serial from ebay, they've installed ok on win 7 64bit so just need to test sometime.
73
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Jamie, GW7SMV
Tue Feb 14 2012, 06:30PM
Jamie, GW7SMV
Registered Member #197
Joined: Mon Apr 07 2008, 10:41AM

Posts: 13
 tried to use the converters but no joy !!
anyone using G4ZLP usb interface with windows 7 64 bit ?
like the look of the one for 2 radios at the same time.
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Stewart, G0LGS
Sun Mar 04 2012, 10:13PM
Stewart, G0LGS
Registered Member #477
Joined: Sat May 31 2008, 10:23AM

Posts: 22
 I failed to get the Maplin USB to Serial converter to work in my Windows 7 64bit Desktop, but they work on Windows 7 32bit on my LapTop.

I managed to find two (2nd hand) different dual port PCI cards that work fine so I have 4 working serial ports.
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Jamie, GW7SMV
Mon Mar 05 2012, 03:04PM
Jamie, GW7SMV
Registered Member #197
Joined: Mon Apr 07 2008, 10:41AM

Posts: 13
 bought the g4zlp pro+ for my icoms, very pleased and works a treat with W7 64bit.
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Rob, OH8GAD
Fri Oct 18 2013, 06:48PM
Rob, OH8GAD
Registered Member #2101
Joined: Thu Oct 17 2013, 12:09PM

Posts: 1
 At work, we use a Belkin USB to serial port adapter. Everyone has the same type, but PCs vary from Windows XP, Windows 7 and Linux Mint. The adapter works on all of them. I can't remember the model number, though, I'd need to check on Monday.
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