[TowerTalk] What coax is this?

[Mark - N5OT]

But boy is RG303 pricey!

Even still, I make my UN-UNs and line isolators out of it because the 
little beads that fit around it are so much cheaper than the big beads 
that fit around RG213!

Mark N5OT


On 8/7/2019 9:19 AM, N4ZR wrote:
> Yup, you and K1XX agree on this - thanks!
> 
> 73, Pete N4ZR
> Check out the Reverse Beacon Network
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> On 8/7/2019 9:26 AM, Paul Christensen wrote:
>> Pete,
>>
>> When faced with the problem of getting enough turns through a core, I 
>> often use RG303 (equiv. Belden #84303).  It's O.D. is 0.17-inch and 
>> its materials composition is in the same class as RG142.  RG303 is 
>> used in several Alpha amplifier models.  You'll also see it used in 
>> several models from Balun Design.
>>
>> Paul, W9AC
>>
>>
>> -----Original Message-----
>> From: TowerTalk <towertalk-bounces at contesting.com> On Behalf Of N4ZR
>> Sent: Wednesday, August 7, 2019 8:47 AM
>> To: towertalk at contesting.com
>> Subject: Re: [TowerTalk] What coax is this?
>>
>> John and others - I recently bought 10 feet of what is sold as surplus 
>> RG-400.  At least it has silver-plated shield and center conductors, 
>> though no printed markings.  My plan was to wind a common mode choke 
>> for my 160-meter Inverted L. I was using a #31 big snap-on, and found 
>> it impossible, because of the stiffness of the coax, to get more than 
>> about
>> 8 turns on the core, and they wouldn't lie down at all.  The jumper I 
>> have is extremely flexible, and would be a cinch for the job.
>>
>> 73, Pete N4ZR
>> Check out the Reverse Beacon Network
>> at <http://reversebeacon.net>, now
>> spotting RTTY activity worldwide.
>> For spots, please use your favorite
>> "retail" DX cluster.
>>
>> On 8/6/2019 8:50 AM, john at kk9a.com wrote:
>>> Why do you want this?  RG-400 is available surplus for $<2 ft,
>>> Amphenol connectors fit it perfectly and it is excellent for
>>> connecting equipment in the shack.  I have used Teflon coax outdoors
>>> too with no issues.  If you hate soldering you can buy RG-400 /
>>> Amphenol 83-1SP assemblies at DX Engineering.
>>>
>>> John KK9A
>>>
>>> N4ZR wrote:
>>>
>>> Maybe 8-10 years ago at Dayton I bought a 3-foot jumper of coaxial
>>> cable with PL-259s (and reducers) on both ends.  It looks like RG-400,
>>> about the same diameter and with the clear jacket, but is much more
>>> flexible, and the braid is not silver-plated.  Anyone know what this
>>> is, and where I can get more of it?
>>>
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