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Any German speakers here?

Discussion in 'Electronic Design' started by Paul Burridge, Dec 5, 2005.

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  1. Hi guys,

    I'm trying to get hold of some RG-214U coax for RF interconnects for
    the VNA I bought.
    I've come across this ad on e-bay from some guy in Germany who appears
    to be offering this type of cable for super-duper hi-fidelity audio
    use! But my German isn't good enough to be sure. And for all I know
    there might be another RG-214 that *is* only suitable for audio,
    whereas I need the low-loss UHF 50 ohm stuff.
    Can someone who speaks the lingo take a look at this page and see if
    it is indeed the right cable for my purposes?

    Here's the link:

    http://cgi.ebay.co.uk/ws/eBayISAPI....ndexURL=0&photoDisplayType=2#ebayphotohosting

    Thanks!
    p.
     
  2. Norm Dresner

    Norm Dresner Guest

    You want coax that connects with Banana Plugs???

    "Plus 8 Bananenstecker"

    Norm
     
  3. Deefoo

    Deefoo Guest

    He is talking about 4 cables each made of heavy silver-plated strands of
    copper (if that's what you call it in english).

    --DF
     
  4. Pooh Bear

    Pooh Bear Guest

    Good Lord.

    He's selling it as *loudspeaker cable* !

    It looks like a genuine RG type though.

    Do you need 2 x 3 metre lengths and 2 x 4.4 metre lengths ?

    Graham
     

  5. translated :

    high end loudspeaker cable RG214 silver line plus 8 bananapluga

    insider tip from the nineties

    the desccription of this cable is M17/75 - RG214 Heden Berkenhoff &
    drebes. You bet on 4 single loudspeaker cable (for a pair of
    loudspeaker)- consisting of two plus and two minus leads plus 8
    bananaplugs.

    This loudspeaker cable consistes of multiple massive thick
    silvercoated copperwires(no cheap flexible wires)

    The leaghts are 2x3m and 2x 4.4m

    The cable did cost 350 euros.

    private sales - no return

    Rene
     
  6. Oddly enough, that'd do very nicely! I actually need 3 x 610mm plus 1
    x 860mm for my network analyzer's patch leads.
    According to Rene's translation, it appears to be the M17/75 mil-spec
    UHF stuff, too. :-\ 26db/100m @ 900Mhz and swept. Of course, at audio
    frequencies, the loss would be negligible so it's easy to see why he's
    marketing it as such. So much more clarity than 'ordinary' speaker
    wire, too. :)
     
  7. Joerg

    Joerg Guest

    Hello Paul,

    Ok, Rene has translated it already. But I'd be careful when buying old
    coax for RF lab gear. Depending on where it has been the innards may or
    may not be that fresh. In the past I have seen some coax that had been
    used outdoors and had gotten a good soaking. At least I'd give the
    seller a ring to check on that.

    If you need 50ohm coax why not go to the next ham shop and buy a length
    of new RG58? It'll hardly set you back more than bid and shipping on
    ebay and then you can be sure it's new, standard, and that you can get
    matching connectors right there at the shop. A good ham shop will have
    N-connectors.

    Regards, Joerg
     
  8. A guy in the States that does a lot of metrology stuff e-mailed me and
    advised me to avoid RG58/RG8 and such like as it's not made to any
    decent degree of tolerance/precision. The stuff I'm bidding on is
    exactly the type he recommended for interfacing the VNA with the T/R
    bridge. There's not much on offer, but sufficient for my purposes,
    fortunately!
     
  9. On Mon, 05 Dec 2005 13:46:13 +0100, Paul Burridge wrote:

    Sorry, I think my speakers came from China.

    Thanks,
    Rich
     
  10. In other words, if you want to spend a buck and a half on crap that you
    could find on the floor, go for it! :)

    Cheers!
    Rich
     
  11. Precision ? What precision do you need ? What for ?
    The difference between RG214 and RG58 is the voltage
    rating. While RG58 is good for 1kV, RG214 is good for
    5kV or so.

    Rene
     
  12. I'm sorry to hear that, Rich; how awful.
    Tell you what, though - if I win the RG214, I'll send you half of it
    to connect up your Chinese speakers with. They'll sound brilliant. ;-)
     
  13. Better than 4 degrees at 1.3Ghz.
    Network analyser interconnects!
    Well, there's never so much disagreement between engineers, it seems,
    than on the subject of transmission lines, feeders and antennas.
    I'll post you here the message I got from this guy (I'll snip his name
    out since it was an e-mail)...

    [begin quote]
    [quote ends]
     

  14. Then tell us all why they didn't use RG/58 at 4 GHz on C-band
    satellite systems? The attenuation of RG/58 is horrible, even at VHF
    frequencies.

    If you want accurate data from a network analyzer the cables have to
    exceed the specs of the analyzer. We used semirigid cable with soldered
    on SMA connectors to test and align tubular filters in the VHF frequency
    range. We used a pair of very expensive "N" to "SMA adapters on the
    front panel of the various HP network analyzers to connect the test
    cables to the unit being tested or aligned. We built the tubular filters
    in house because the lead times were too long for custom frequencies.
     
  15. RG58 is only single shielded by the way, too.

    Rene
     
  16. Dave Holford

    Dave Holford Guest

    I don't really follow this 'speaker cable' nonsense; but I do recall a year or two ago at some European Audio show
    the winner of some professional award for woderful audio was asked what he was using for his speaker cables at the
    show and responded that he was using extension cords from the local hardware store.

    Dave
     
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