I think it was a good thread as we always learn something.
Got some private emails with further interesting details.
Discovered RG401, which was out of my radar too.
Thank you specially to Byron, Jim, John and Michael.
73, Maximo - EA1DDO
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Máximo
EA1DDO_HK1H
Sent: jueves, 18 de marzo de 2021 20:26
To: towertalk@contesting.com
Subject: Re: [TowerTalk] RG-402 wound on FT-240 core
Here you can see both, RG400 (FT240-31) and RG402 (FT240-43);
https://i.ibb.co/hKvbfVb/IMG-20200819-174706.jpg
To place it in an enclosure, wound with basic care... seems a good alternative.
73, Maximo
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Lux, Jim
Sent: jueves, 18 de marzo de 2021 19:28
To: towertalk@contesting.com
Subject: Re: [TowerTalk] RG-402 wound on FT-240 core
On 3/18/21 11:36 AM, Michael Tope wrote:
> When using the solder-soaked braided coax, bear in mind that it if you
> flex it enough the solder starts to crack. Often you'll see the solder
> first crack in the area where the shield intercepts the connector
> body. If you are going to form a choke and leave it alone, that
> probably won't be an issue. I don't have any experience using coax
> like this in an outdoor environment, so I would be hesitant to wrap it
> around a stack of toroids and then hang from the feedpoint of an
> antenna without some sort of enclosure to protect it from the
> environment (and to provide mechanical strain relief for the
> connectors). YMMV.
>
> 73, Mike W4EF...............
>
Very much agree. The handforming is nice, but if it's jacketed, it can
crack and you can't see the crack. In fact, you can't see the cracks
sometime in the unjacketed stuff.
Bend radius will also be an issue. Those popular 2.4" cores are about
1/2" on a side cross section. The minimum bend radius for the
handformable stuff is 0.6 inches, so the "turn" would be 1.2" in diameter.
Unless you happen to have a big heap of the stuff sitting around, I
can't really see the advantage over using a flexible coax, other than it
"looks cool". And just like chromed tail pipe extensions, they DO make
the car go a little bit faster, don't they?
> On 3/18/2021 9:19 AM, Byron Tatum wrote:
>> Just a note -- The actual semi-rigid cable (silver plated copper
>> tubing outer conductor 0.141" OD) that is being discussed RG-402 has
>> an equivalent in a "conformable" cable. This conformable cable is the
>> same construction except instead of solid copper tubing outer
>> conductor it has a solder-soaked braid. Easier to work with and same
>> electrical properties. Huber-Suhner produces one called "Sucoform"
>> and another called "Sucoflex". I use the RG-401 size (0.250") for
>> making short jumpers in my VHF/UHF station, using the same connectors
>> made for RG-401 semi-rigid. These connectors are easy to find and not
>> expensive, if you dig around a little. This 0.250" cable has very
>> high power handling ratings at VHF/UHF. There is a Chinese supplier
>> of conformable cables on eBay. You can get both of these sizes with
>> or without a jacket. The Huber-Suhner cable Sucoform has no
>> jacket.Just some limited information from my experience,Byron W5FH
>> _______________________________________________
>>
>>
>>
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