[TowerTalk] Teflon Coax with Center That's NOT SCCCS?
k3lr at k3lr.com
Tue Jan 16 20:56:27 EST 2018
For those that do not want to build their own, DX Engineering makes various
lengths of jumpers using RG400 with Amphenol 83-1SP UHF male connectors
(very high quality)on both ends. Hi pot tested and silver soldered - ready
The double shield with RG400 works great.
The K3LR station (11 operating positions) uses all RG400 jumpers.
From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of
Sent: Tuesday, January 16, 2018 8:34 PM
To: Stan Stockton; jim at audiosystemsgroup.com
Cc: towertalk reflector
Subject: Re: [TowerTalk] Teflon Coax with Center That's NOT SCCCS?
Real M17/128-RG400 spec RG400
There are a bunch of "RG400"ish cables our there, so I only buy known
maker with milspec id on jacket.
I have about 100feet of Harbor M17/128-RG400 around, from 3 or 4 diff
sources. I use for "choke in box", test leads, rotator loops for 6M and
Spent forever searching, but ended up settling on milspec RG400, and I
found some UT-141 milspec cable that is raw copper shield, with silver
plated copper center instead of SCCS. (There seem to be about 40
sub-versions of UT141, 3 or 4 have a silver plated copper center instead
Above 6M for rotator loops and similar I like M17/127-RG393, but hard to
find at a reasonable price.
Suggest hitting the auctions and specifically looking for M17/128-RG400
where you can clearly see Harbor Industries and M17/128-RG400 on the
jacket, took some shopping but I don't think I paid more than $1/foot
for the several hundred feet I purchased over the last few years, just
had to watch and wait for a decent deal on a 30+ft length.
If you only need a few feed once, it is always around in 10 - 20ft
lengths for several times that.
On 1/16/18 03:02, Stan Stockton wrote:
> Silver plated stranded center
> 1" bend radius
> .195" OD
> 50 ohms
> Choice by many for chokes
> Stan, K5GO
> Sent from Stan's IPhone
>> On Jan 16, 2018, at 12:13 AM, Jim Brown <jim at audiosystemsgroup.com>
>> All the 0.195-in o.d. TFE coax cables I can find have a center conductor
that is silver-coated copper-coated steel. This is fine above HF, but it's
not great for 160M and 80M, where the steel is contributing to loss.
>> Can anyone point me to a 50 ohm TFE 0.195-in o.d. cable whose center is
NOT coated steel?
>> Likewise, they all have a solid center with a 2-in bend radius. Anyone
know of one with a smaller bend radius?
>> 73, Jim K9YC
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