[TowerTalk] Siamese type Coaxial Cable with /4 wire needed.

[n8de at thepoint.net]

Why the 4-wire control cable?

You can use the coax for switching ... I invented the idea in the  
70's... it's very much like what is in the ARRL Antenna Handbook (and  
the ARRL Handbook) ...
similar switching is available from MFJ/Ameritron .. and was used by  
Drake and Heathkit years ago.

Just need to build a small blocking circuit at each end of the coax.

73
Don
N8DE


Quoting jimlux <jimlux at earthlink.net>:

> On 1/7/16 4:23 AM, John K0CQW wrote:
>> Looking for 8X type coax with 20 ga / 4 wire control Siamese together.
>> approximately 50 feet.(OR variations)
>>
>
> You might find some 75 ohm coax with wires as used in security/video/
> ENG systems.
>
> Belden 9265 is RG59 + a shielded twisted pair. 9165 has 3 pairs.
> http://www.belden.com/techdatas/english/9265.pdf
> 1dB/100ft loss at 10 MHz
>
> There's also Belden CCTV cable RG6 + 18/2
>
>
>
>
> For only 50 ft, I'd get some black heat shrink and use it to bundle
> your coax and control cable. something like a half inch of heat shrink
> every foot.
>
> Or, depending on the environment, just spiral black tape the length of it.
>
>
>>  Any sources ?
>>
>> Looking to get a OM on the the air in a assisted living.
>>
>>  Working with a Icom AH-4.
>
> Are you fixed on the AH4?  There are other remote tuners that can be
> powered/controlled via the coax.
>
>
>
>>
>> HAVE to make this a "CLEAN" installation.
>>
>>  Specifically looking for the coax and control wire together.
>>
>> Thanks de John KØCQW
>> _______________________________________________
>>
>>
>>
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