<div dir="ltr">Coax for TV uses 75-Ohm cable, because that's a 4:1 transformer balun ratio for 300-Ohm Twin Lead. TV Antenna Twin Lead is 300-Ohms because 300 ohms is the RF impedance of free space. You want the transmission line to be impedance-matched to the antenna for maximum signal transfer.<br><br>Ethernet Computer Coax, on the other hand, is 50-Ohm. But almost no one uses Coax Ethernet any more because it was developed decades ago for 10 Mbps bandwidth and has long been supplanted by UTP (Unshielded Twisted Pair) Ethernet with Modular Plugs.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Feb 7, 2023 at 12:13 AM Charles Holbrow <<a href="mailto:chholbrow@gmail.com">chholbrow@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Ted wants more information about the coax I am offering. The long runs of white cable were used to connect an incoming cable signal to several output jacks for TV or modems in different rooms of an apartment. Therefore most of the cable is CATV 6 Series 18 AWG. The connectors are mostly F compression. The attached table shows the lengths, colors, and the specifications printed on the cables and their connectors.<div><br></div><div>The splitter is a Holland GHS-2FC LI 2-way splitter 5-1000 MHz.<br><div><div><br></div><div>--Charlie</div></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Feb 6, 2023 at 12:19 PM Ted Kochanski <<a href="mailto:tedpkphd@gmail.com" target="_blank">tedpkphd@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr">Charles,<div><br></div><div>You need to be a bit more specific -- as the cables with different impedances are totally incompatible except when used for DC or as audio [shielded cables]</div><div>Once you are using the cables for RF OR Digital signals impedance is critical</div><div>are you talking two of the most common: RG-58 [ 50 Ohm ] or RG-59 [ 75 Ohm ] </div><div>or something else?</div><div>other important parameters are: diameter, types of shields, types of jackets, flexibility, fire rating, power rating, maximum operating frequency</div><div><br></div><div>and then besides BNC [the most common] there are many other types of connectors some of which are hard to find adapters to interconnect to more standard connectors</div><div><br></div><div>So your offer is interesting but incomplete</div><div><br></div><div>for example see the following spec for a cable available from Pasternak</div><div><a href="https://www.pasternack.com/low-pim-flexible-tft-5g-402-fep-jacket-tin-outer-conductor-double-shielded-tft-5g-402-p.aspx" target="_blank">https://www.pasternack.com/low-pim-flexible-tft-5g-402-fep-jacket-tin-outer-conductor-double-shielded-tft-5g-402-p.aspx</a><br></div><div><br></div><div><h4 style="box-sizing:inherit;margin:0px;padding:0px;font-family:"Saira Semi Condensed",sans-serif;color:rgb(73,73,73);line-height:1.875rem;font-size:1.5rem;display:flex">Key Specifications</h4><div style="box-sizing:inherit;margin:0px;padding:1.25rem 0px;color:rgb(73,73,73);font-family:Roboto,sans-serif;font-size:18px"><table cellspacing="0" style="box-sizing:inherit;border-collapse:collapse;width:650px;margin-bottom:1rem;border-radius:3px;border:0px"><tbody style="box-sizing:inherit;border:0px;background-image:none"><tr style="box-sizing:inherit;border-bottom-width:0px;background-image:none"><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem">Generic Name</td><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem;text-align:right">TFT-5G-402</td></tr><tr style="box-sizing:inherit;background-image:none"><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem">Flex Type</td><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem;text-align:right">Flexible</td></tr><tr style="box-sizing:inherit;border-bottom-width:0px;background-image:none"><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem">Impedance</td><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem;text-align:right">50 Ohm</td></tr><tr style="box-sizing:inherit;background-image:none"><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem">Dielectric Type</td><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem;text-align:right">PTFE</td></tr><tr style="box-sizing:inherit;border-bottom-width:0px;background-image:none"><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem">Velocity of Propagation</td><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem;text-align:right">76 %</td></tr><tr style="box-sizing:inherit;background-image:none"><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem">Jacket Diameter</td><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem;text-align:right">0.16 in</td></tr><tr style="box-sizing:inherit;border-bottom-width:0px;background-image:none"><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem">Jacket Material</td><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem;text-align:right">FEP</td></tr><tr style="box-sizing:inherit;background-image:none"><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem">No. of Shields</td><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem;text-align:right">2</td></tr><tr style="box-sizing:inherit;border-bottom-width:0px;background-image:none"><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem">Passive Intermodulation</td><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem;text-align:right">-160 dBc</td></tr><tr style="box-sizing:inherit;background-image:none"><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem">RF Shielding</td><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem;text-align:right">80 dB</td></tr><tr style="box-sizing:inherit;border-bottom-width:0px;background-image:none"><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem">Frequency, Max</td><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem;text-align:right">5.8 GHz</td></tr><tr style="box-sizing:inherit;background-image:none"><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem">Max Operating Temperature</td><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem;text-align:right">150 deg C</td></tr><tr style="box-sizing:inherit;border-bottom-width:0px;background-image:none"><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem">Center Conductor Type</td><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem;text-align:right">Solid</td></tr><tr style="box-sizing:inherit;background-image:none"><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem">Inner Conductor, Number of Strands</td><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem;text-align:right">1</td></tr><tr style="box-sizing:inherit;border-bottom-width:0px;background-image:none"><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem">Minimum Bend Radius, One Time</td><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem;text-align:right">0.75 in</td></tr><tr style="box-sizing:inherit;background-image:none"><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem">Coax Type</td><td style="box-sizing:inherit;padding:0px;border-top:1px solid rgb(205,205,205);border-bottom:1px solid rgb(205,205,205);font-size:1.125rem;line-height:3rem;text-align:right">Coax</td></tr></tbody></table></div></div><div><br></div><div><br></div><div>Ted</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Feb 6, 2023 at 11:51 AM Charles Holbrow <<a href="mailto:chholbrow@gmail.com" target="_blank">chholbrow@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr">I have coax cable I would like to get rid of. All lengths have connectors.<div><ul><li> There are 4 lengths of 3' each. (3 white, 1 black)<br></li><li>36' of black</li><li>24' of white</li><li>63' 5" of white'</li><li>1 splitter</li></ul><div>Are there any LCTGers who would like these? And if you want to trade, I need an ethernet to ethernet cable.</div></div><div><br></div><div>--Charlie</div></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
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