RG-400 is way better in my opinion because of stranded center conductor.
Stan, K5GO
> On Sep 22, 2017, at 6:01 PM, Grant Saviers <grants2@pacbell.net> wrote:
>
> I've made 20+ with RG142 using the "cookbook" smaller coax turns and core
> counts, 160 to 10. Measured with my VNWA the L & R values are near the
> expected. The TFE is UV resistant and some chokes are in PVC junction boxes
> and some not. At 6m the RG142 is at its QRO limit, below that it is fine
> QRO+. My 142 is the double braid silver plated version, it comes both ways
> with the same obsolete RG unless it is MIL marked as mine is.
>
> Grant KZ1W
>
>> On 9/22/2017 13:48 PM, Jim Brown wrote:
>>> On 9/22/2017 8:16 AM, David Needham wrote:
>>> I have made several full power CM chokes for 80m and 160 m using RG213 and
>>> Mix 31 toriods per your articles. Do the number of cores or turns count
>>> change if I use RG142 for lighter weight?
>>
>> Dielectric and o.d. of the coax both affect resonance. I have no data for
>> RG142, but I suggest that you start with the guidelines for RG59/RG8X.
>>
>> 73, Jim K9YC
>>
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