[TowerTalk] Fwd: F-connectors

Fri Mar 15 06:56:35 EDT 2019

Hi Charlie,
Yeah, I know. But it will tell me if the old cable is still doing its job. I checked the spec sheets for the cables listed below. Loss below is for 100'.
Commscope F660BEF RG6 (copper clad steel conductor. What I have been using)
5MHZ - .58db

Belden 1829BC RG6 (bare copper conductor)
5MHZ - .5db

Belden 8213 RG11 (bare copper conductor)
1MHZ - .2db
The other figure in their chart at 5MHZ doesn't make sense

Belden 8233 RG11 (bare copper conductor)
1MHZ - .14db
3.6MHZ - .3db
No 5MHZ figure.

I wouldn't think I could hear or really measure the difference for 1/4 wave feedlines for my 80M elevated feed 4-sq.
By the way I had made up 3/4 wave feedlines so I can bury them to the Comtek box. The 3/4 wave had a somewhat sharper curve for dumped power into the dummy load.

73,
N2TK, Tony

-----Original Message-----
From: TowerTalk <towertalk-bounces at contesting.com> On Behalf Of charlie carroll
Sent: Thursday, March 14, 2019 8:15 PM
To: towertalk at contesting.com
Subject: Re: [TowerTalk] Fwd: F-connectors

Measuring at 50 MHz, the difference in loss / 100 feet is about 0.4dB for the 2 cables.  Make it a 1/4 section at 80 meters and you're near
0.1 dB difference in loss.  Good luck making meaningful measurements.

73 charlie, k1xx

On 3/14/2019 7:49 PM, N2TK, Tony via TowerTalk wrote:
> Yeah I know. But if the loss difference is low that tells me something too. I also have some 3/4 wave new RG6 made up I can use to compare to some new RG11.
>
> Sent from my iPhone
>
>> On Mar 14, 2019, at 7:34 PM, Gedas <w8bya at mchsi.com> wrote:
>>
>> Well between the RG-6 & RG-11 you know which coax will have lower loss.  And unless you collected trusted data 20 years ago on the old RG-6 you really will not know if you just had crappy coax and connectors from the start or if something changed over the years.
>>
>> Gedas, W8BYA
>>
>> Gallery at http://w8bya.com
>> Light travels faster than sound....
>> This is why some people appear bright until you hear them speak.
>>
>>> On 3/14/2019 6:56 PM, tony.kaz--- via TowerTalk wrote:
>>> I am now curious. I assume a good test would be to measure the loss of my 20+ year old 1/4 wave RG6 feedlines for my 80M 4-sq on 3.5 and then make up an RG11 1/4 wave and see how the loss compares. Will do that over the next couple of weeks.
>>> 73
>>> N2TK, Tony
>>>
>>> -----Original Message-----
>>> From: TowerTalk <towertalk-bounces at contesting.com> On Behalf Of Paul 
>>> Christensen
>>> Sent: Thursday, March 14, 2019 1:46 PM
>>> To: towertalk at contesting.com
>>> Subject: Re: [TowerTalk] Fwd: F-connectors
>>>
>>>> Important: Most RG-6/RG-11 is copper clad steel (CCS). Make sure you DON'T nick or cut the thin copper layer when prepping for connectors or you'll be transmitting through steel coax..."
>>> It doesn’t take much of a nick either to later find a build-up of rust particles when opening up an unsealed F connector.  For the last two years, I've been purchasing 1,000 ft rolls of Belden 1829BC from Markertek.   Price is approx. USD $150 per roll.  It's gel-flooded RG6 with a solid copper inner conductor and works well with old and new SNS compression connectors like the new PPC EX6XLSPlus I mentioned earlier.  A solid copper inner has the added advantage of lower voltage drop when used in DC power-passing applications on extended runs.
>>>
>>> Paul, W9AC
>>>
>>>
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