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Author Topic: Cables with BNC Connectors/Adapters Are Generating A Superoir SQ  (Read 194718 times)
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manisandher
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« Reply #90 on: September 13, 2014, 07:35:37 pm »

Hi George, thanks for the 'warning'. I suspect the jacket in the photo looks transparent because of the flash photography. I can't believe that anyone would sell counterfeit cable that retails for only $3/m - doesn't seem worth their while - and the eBay seller definitely looks like a genuine RF dealer.

But I totally agree that it'd be better to get the K03252D cable. 'Better' more from a psychological point of view than sound POV perhaps, because we have no idea if they actually sound different. If the real point is impedance matching, then there might not be a difference in sound.

The K02252D cable has cost me very little, so I'm inclined to go ahead with the purchase because the K03252D cable looks much harder to obtain. If anyone knows where I could get 20m of K03252D then please let me know asap, as in which case I would definitely cancel my order.

Cheers, Mani.
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vrao
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« Reply #91 on: September 13, 2014, 07:53:37 pm »

This is what looked interesting.

http://www.cablesondemand.com/category/CORG142/product/CO%2D142BNCX200/URvars/Items/Library/InfoManage/CO-142BNCX200.htm

*edit* this cable has the similar specs as the H+S cable
http://www.amphenol.ru/pdf/RG-142.pdf

Any good BNC to RCA adapter?
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manisandher
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« Reply #92 on: September 13, 2014, 08:33:29 pm »

Hey VJ, the performance looks similar to the 'expensive' K03252D H+S cable. But then again, the 'cheap' K02252D H+S cable seems to have similar performance too.

Not too sure about the description of the Amphenol either:

"Solid Silver-coated Copper Clad Steel Conductor". Sounds more like the K02252D than the K03252D.

Mani.
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« Reply #93 on: September 13, 2014, 08:58:40 pm »

Hi Mani,
I might be missing something but from the "cables on demand" it says solid silver coated copper center conductor.
Again from that PDF on the top it mentions something about steel on top, but the details it mentions the inner conductor is silver-copper.
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manisandher
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« Reply #94 on: September 13, 2014, 09:02:52 pm »

From the datasheet you linked:

http://www.amphenol.ru/pdf/RG-142.pdf

Ambiguous... and disingenuous if it is indeed copper-clad steel, IMO.

Mani.
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manisandher
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« Reply #95 on: September 13, 2014, 09:30:46 pm »

Again from that PDF on the top it mentions something about steel on top, but the details it mentions the inner conductor is silver-copper.

Yep, and hence ambiguous. Can they still call it 'silver copper' if it is 'silver-coated copper-clad steel'?

In any event, I can't imagine the 'steel' is a mistake.

Mani.
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« Reply #96 on: September 13, 2014, 09:38:36 pm »

Strange indeed.
It's the same "MIL-C-17 type" grade, I presume it should have the same specs.
Anyways Amphenol claims to be the inventor of BNC connector.
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nik.d
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« Reply #97 on: September 13, 2014, 09:56:55 pm »

According to H+S "High Temperature - K series" (page 48) coax cables Joachim provided link to, the best (double shielded coax) is RG_393.
That's why I mentioned it earlier.  Plus variation of it, with blue colored jacket, ENVIROFLEX_393. Then comes K03252D, RG142, RG400 etc.


* H+S_HighTemp_K_class_coax.JPG (64.23 KB, 1074x504 - viewed 1006 times.)
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« Reply #98 on: September 13, 2014, 10:13:49 pm »

Again from that PDF on the top it mentions something about steel on top, but the details it mentions the inner conductor is silver-copper.

'silver-coated copper-clad steel wire'


Hi,

the above is the correct term. (see ASTM B 452-09, for electronic applications)

------------------------

I went through all technical datas of the Huber+Suhner cable families, and the ENVIROFLEX and K - types are covering our application best.

When I have a look to the attenuation diagrams (see above from nik.d), and see where  the audio frequency is working, the curves of the cables are not that far apart.
The capacitance of both families is nearly the same (94pF/m & 96pF/m).

I think it will not a big mistake if we stick to the K_02252_D.

My proposal: If somebody wants to climb to the top he may test the K_02252_D60 and write his experience.

When we have a look to the weight and the diameter of the conductor of the cables, the _D60 is ......... .

Joachim
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christoffe
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« Reply #99 on: September 14, 2014, 02:22:31 am »


Hi,

both same cables (RG 142)  are a "silver-coated copper-clad steel wire". Conductor dia=0,95mm.

see:

http://www.awcwire.com/productspec.aspx?id=m17/60-rg142-coaxial-cable
&
http://www.hubersuhner.com/ProdDet/3147173

Joachim

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boleary
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« Reply #100 on: September 14, 2014, 03:50:19 am »

No mention of any steel conductor in the RG142B cable that I ordered:

http://www.l-com.com/multimedia/catalog_page/2K14M1_165-RG142B-U-and-RG213-U-50-Ohm-Cable-Assemblies.pdf

The order was from here:

http://www.l-com.com/coaxial-rg142b-coaxial-cable-bnc-male-male-30-ft
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« Reply #101 on: September 14, 2014, 06:24:17 am »

Hi,
Can someone explain why something like this would not be appropriate?
http://www.trilogycoax.com/pdf/wireless/aircell_catalog/AirCell_Catalog_Plenum.pdf
I see the following interesting features
Item: AQC012J50
Capacitance: 72 Pf/m
Velocity of propagation: 95% speed of light (RG142 @ 70%)
Dielectric: Air

What is different is the corrugated jacket.

Thanks,
VJ

P.s Anyone with recommendation of a good BNC to RCA Adapter?!
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christoffe
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« Reply #102 on: September 14, 2014, 11:22:27 am »

Hi,

Note to boleary & vrao.

When I have a look to the diagrams of  Reply #97 by nik.d I'm "nitpicking". Beg your pardon.

Both diagrams are showing nearly no differences (nothing due to the small scale) in the audioband up to 20KHz within the single and the double shielded cables, and we should hear no deviations in a blind test until otherwise proven.

Joachim

EDIT:

Mani is very enthusiastic with his intermediate "cheap" BNC cables, and it will be interesting to read his comment about the new cable (K_02252_D).
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nik.d
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« Reply #103 on: September 14, 2014, 11:48:10 am »

Agee Happy

Intrigued by vrao's question on 'Good BNC to RCA adopters' have searched  a few.
The only one with tech details, most important would be Freq. Range, is the one Mani already suggested: Emerson 27-8110, Fr.Range: DC to 2GHz.
No other manufacturer/distrubutor is stating this information. And here are few suggestions, from easy available to 'boutique' one's:

Emerson 27-8110 @ Mouser Part#: 601-27-8110
http://eu.mouser.com/ProductDetail/AIM-Cambridge-Emerson-Connectivity-Solutions/27-8110/?qs=dEO1gfb2FsoQhhrXS/AHfA==

Bomar @ Digikey Part#: 991-1109-ND
http://www.digikey.com/product-search/en?pv166=318&pv167=614&FV=fff40016%2Cfff803d6&mnonly=0&newproducts=0&ColumnSort=0&page=1&quantity=0&ptm=0&fid=0&pageSize=100
http://media.digikey.com/Photos/Bomar%20Inter%20Photos/R0844.jpg

Pacificcable Part#: RFA-8392
http://store.sacelec.com/index.php?l=product_detail&p=299

Oelbach Part#: 4601
http://www.oehlbach.com/en/computer/dvi-vga/adapter/bnc-co-2


George
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manisandher
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« Reply #104 on: September 14, 2014, 12:56:03 pm »

Thanks George.

From the pic, the Emersons look like they should have a gold-plated centre pin. The ones that I received from Mouser definitely do not have this. But the packaging stated the exact same part number.

The Oelbachs look nice - I'll probably try to get these if I can at some point (again, for purely psychological reasons and being able to sleep well at night).

Incidentally, I have asked for my K_02252_D cable from eBay to be cancelled (I haven't received a reply from the seller yet but am assuming it will be OK to cancel). My thinking is that if I'm going to bother replacing the cheap cables I'm already using then I really want the 'best' I can find (again for purely psychological reasons). Otherwise I may as well just keep my current cables, which sound great anyway.

Mani.
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Audio PC: Phasure Mach II *with clock upgrade* / Win 14393.0 on RAM-OS / controlled by RDC, no GPU card installed / connected directly to music server
XXHighEnd: 2.10 / Minimize OS / Engine#4 Adaptive / DB=4096 / *trying*: Q1=30 / xQ1=40 / Q3,4,5=1 / SFS=5.19 / XTweaks = 52, 10, 0, 0, 1 / Straight Contiguous / Clock Resolution = 15ms / Scheme 3-5 (low/realtime) / 8x Arc Prediction (switch #5 'up/off') / Unattended
Main System: mobo USB3 port -> Lush -> Phasure NOS1a B75 G3 -> First Watt F5-cloned mono amps -> Tune Audio Anima horn speakers
Office System: Lush -> Phasure NOS1a G3 -> BD-Design BD30-SPR mono amps -> Tune Audio Marvel horn speakers
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