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Hi Everyone,I live w/in 1500-meters of about 15-radio/TV transmitters...so I have an RFI issue. See below for the other means I've used to address this issue, but am always looking for MORE / BETTER!
Just wondering if there might be any benefit (or detriment) to taking a run of cryoed Romex and stripping the outer covering off (so that there are 2-insulated conductors and 1-uninsulated ground wire) and then twisting the conductors together (twisted pair). I was then considering taking either foam pipe insulation or an air-hose and use it to cover the pair. I'll buy a 10-gauge insulated ground wire and wrap it around the pipe insulation in the opposite direction that the conductors were twisted. I'm considering usin this to run from my breaker box to my dedicated outlet in my listening room.
Essentially this is a modified form of what Chris VenHaus uses for his flavor 2 power cord recipe. Chris comments on his DIY recipe page, "there is > 1/8" spacing between the safety ground and inner conductors by using the heavy walled high-pressure air hose as a spacer. Combined with the shield removal and the counter-spiralled ground, I believe this design may achieve the absolute lowest capacitive coupling between the inner conductors and safety ground."
The other thought that came to mind was, hhmmmm, if this works w/twisted pair, why not star-quad (i.e. modified Flavor 4 recipe)?
I understand that the insurance comany may not like my idea, though if I do embark upon this mission I will be very careful during assembly and installation.
Thanks in advance for the feedback!
Regards,
Doug
Here's what I got goin' on already w/in the electrical system:
-Dedicated 20-Amp line.
-Furutech FP-15cu outlets
-Modified Monster HTS3500 mkII (added Furutech IEC, VH-Audio Flavor 4, reinforced all traces on all boards, bypassed filtration for amps, and use all Furutech FP-15cu outlets..)
-All cords are VH-Audio Flavor PCs, all use Furutech cu terminations
-Z-Sleeve Extra Heavies on every power cord (waaay good!!)
-A couple of HighWire PowerWraps
-DIY Cable lifters
-Walker SST on all connection points (plugs & IECs, wire-IEC/plug junctions, etc...)
-DIY Jon Rish SQ&D (super quick & dirty) isolation transformer for CDP
-Multiple sized ferrite cores/chokes on power cords all over the house....fridge, fans, computer, etc...but not used in the audio system
-A couple of Quantum ElectroClears
-Some DIY BC86 parallel filters (following some of Al Sekela's suggestions)scattered about the house.
-2 DIY Richard Gray Power Conditioner (Hammond 193L)Heya Matt (GooberDude)! Heya MichaelV!
Follow Ups:
I think this is meant as an audiophile upgrade to Romex, as it uses solid copper wire. It is twisted, which will help reject the broadcast RF. It has 30-ampere capacity.
Al,This Oyaide cable looks great! Though as you said, it is a bit pricey...and unfortunately above my budget. That would add up to nearly $800 for my application.
I may just stick with Chris VenHaus' 10-2 Cryoed Romex (no shield), and/or explore GlenB's suggested cable(s) a bit further.
In your opinion are there any protential drawbacks to using conduit that is hard connected to the breaker box, etc... Specifically issues with perceived constriction of dynamics (with analog components /amps) as a direct result of using the conduit....similar to what one could experience when using shielded power cords vs unshielded. Or is this just a flawed comparison that I'm drawing here?
GlenB has not experienced any issues.....
Thank you for taking the time to respond.Best Regards,
Doug
Steel is generally a bad material to have around wiring for audio: all the better outlet devices avoid steel parts. If you have to have steel conduit and can get at the outside of it before the wall is closed in, consider apply some sort of acoustic damping material to it.Two of my dedicated circuits are routed in aluminum armored cable. The only complaint I've had from a reliable audiophile has been a sense of reserve: perhaps that is the constricted dynamics you are worried about
Al,Good to know about the steel conduit and of your experience with the armored cable that you're using.
Thank you once again.
Best,
What you propose about stripping the outer jacket off Romex and replacing it with foam pipe insulation or air hose is madness. There's so many things wrong with that. At the top of the list is that the coverings you add may cause the conductors to overheat during use. The ampacity of electrical conductors is based on their ability to dissipate heat. If you restrict that ability, the ampacity is reduced and the wire has to be derated. If you need shielding, try installing type MC cable (armored cable) or individual conductors in EMT.
OK,GlenB, Thank you for telling me as it is. Thanks for the good idea too.
I'll look into the armored cable / flexible conduit. Another gentleman emailed me with a similar response and suggestion. ....Yeah, in retrospect, this doesn't seem like such a hot idea....oh well, thank goodness I asked before just going ahead with my hair-brained concept....
Question: Do you know if there are any issues associated with constricted dynamics when using the armor/conduit/external shield, similar to what many've experienced with (internal foil/mesh)shielding on regular PCs vs. non-shielded PCs, especially for analog components? Or am I "barking up the wrong tree"..."2-different animals"....?
Thanks again,
Doug
My dedicated line consists of individual type THHN/THWN wire in EMT. I can't say I've ever been able to hear any negative effects.
GlenB,Good to hear.
Thank you.
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