I would be cautious about buying off of Amazon or ebay. I purchased a
couple of units and they created a lot of RF hash that made reception nearly
impossible (I used them in my truck to find power line noise, 10m hamstick
on the back of the truck). I eventually purchased a Sabrent SBT-FTDI from
Newegg.com for $14 and it was RF quiet. I have used the Sabrent unit for
several years and have had no issues.
I also had a similar experience with shielded Ethernet cables. I purchased
a set of 5 off of Amazon. The shields had resistances of 1-20 ohms. The
drain wire was compressed against the metal shell, not soldered and that
connection varied in resistance. I then purchased 5 Amphenol cables off of
Mouser.com ($7 each). The drain wire on those was soldered to the metal
shell and all had resistance of less than 1 ohm.
As a side note, if you run a cable modem and router for your home
installation, you will likely find the cable modem is grounded via the RG-6,
but the router is floating (no connection to ground). Connecting the cable
modem to the router with a 3 ft shielded Ethernet cable extends the ground
to the router and lowered by 80m noise level significantly.
Jeff, W4DD
-----Original Message-----
From: TenTec <tentec-bounces@contesting.com> On Behalf Of Malcolm McLeman
Sent: Saturday, February 02, 2019 7:12 AM
To: tentec@contesting.com
Subject: Re: [TenTec] USB to serial adapter cable that works with OMNI VI??
Further to my reply below... Have investigated the ex Oriental ebayer's
feedback and this is what he was selling.
USB to RS232 Serial DB9 Converter Adapter Cable For Win7 64 Mac FTDI Chip
On 2/1/2019 5:49 PM, Malcolm McLeman wrote:
> Am looking for the same and wondered if this would be of any assistance.
> The Oriental dealer is not longer on Ebay but there are adapters out
> there using the same chip.
>
> http://ve7sl.blogspot.com/2016/02/usb-ptt-line-keying.html
>
> 73 F5VBU
>
> On 1/30/2019 6:17 AM, Peter Bertini wrote:
>> Need some advice on selecting a USB adapter to provide a serial port
>> for controlling my Omni VI.
>>
>> The Dell machine I am using allows the RTS line to go high when the
>> port is not in use, so it does not play nice with RTS CW keying
>> interfaces.
>>
>> Need an adapter that will allow my N4PY programs and others to work
>> with my Dell.
>>
>> Pete
>> _______________________________________________
>> TenTec mailing list
>> TenTec@contesting.com
>> http://lists.contesting.com/mailman/listinfo/tentec
>>
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