Shielded Banana Plugs
in [Design]
|
Prev: Are these the same differential probes?
Next: The next step: A way to produce flexible gallium arsenid wafers in quantity has been found
From: Joel Koltner on 27 May 2010 19:05 "Joerg" <invalid(a)invalid.invalid> wrote in message news:8688frFe67U1(a)mid.individual.net... > Yes, you need big bertha to do that. 150W is sort of a minimum, I prefereed > a 500W iron for that, it was faster. I normally use one of those really small blowtorches (like the ones that use cigarette lighters for their source of gas) -- the small size makes them rather more maneuverable than a big iron. Oh, plus I'm cheap at times and the good quality big irons are spendy. :-)
From: Dave Platt on 27 May 2010 18:22 In article <6KKdneCFgYK3QGPWnZ2dnUVZ_s2dnZ2d(a)web-ster.com>, Tim Wescott <tim(a)seemywebsite.now> wrote: >The only two strikes that I see against it is that (a) it can be hard to >solder correctly, and (b) in light of the performance of a >constant-impedance connector, the term "UHF" is laughable, however much >the connector may have outperformed whatever it replaced. My understanding is that the original meaning of the acronym was "Universal High Frequency", and was not intended to refer to "ultra high frequency" operation. >(b) is just a marketing problem -- the connector works fine at HF. I believe that was its original intended application. -- Dave Platt <dplatt(a)radagast.org> AE6EO Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads!
From: Michael A. Terrell on 27 May 2010 19:28 Tim Wescott wrote: > > On 05/27/2010 03:02 PM, Joerg wrote: > > Tim Wescott wrote: > >> On 05/27/2010 01:00 PM, Joerg wrote: > >>> Tim Wescott wrote: > >>>> On 05/27/2010 11:14 AM, Tauno Voipio wrote: > >>>>> Joerg wrote: > >>>>>> Tim Wescott wrote: > >>>>>>> I want to make some custom cables for battery testing to plug > >>>>>>> into my > >>>>>>> Fluke meter. I'd really rather use the nifty shielded banana plugs > >>>>>>> like Fluke uses, to reduce the chances of inadvertently frying a > >>>>>>> battery. > >>>>>>> > >>>>>>> Anyone know a source other than Pomona, which wants an arm and a > >>>>>>> leg? > >>>>>>> > >>>>>> > >>>>>> I don't know what an arm and a leg goes for these days, and I've not > >>>>>> bought anything myself there so far, but here is one vendor: > >>>>>> > >>>>>> http://www.testpath.com/Categories/Banana-Plugs-4mm-Shrouded-Straight-In-line-2940.htm > >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> Hint for your web searches: The popular term is shrouded banana plug, > >>>>>> not shielded. > >>>>>> > >>>>> > >>>>> A shielded banana plug is called PL 259, also UHF connector. > >>>>> > >>>> By construction that's not really a banana plug -- banana plugs have > >>>> the spring on the plug, not the socket -- but you've certainly > >>>> captured the level of sophistication of the PL-259 and its close > >>>> relatives! > >>>> > >>> > >>> It has been much maligned but I have to say that the PL-259 has always > >>> been good to me. You can safely get a kilowatt across. Plus banana plug > >>> fit into the socket, in a pinch. > >> > >> The only two strikes that I see against it is that (a) it can be hard > >> to solder correctly, and (b) in light of the performance of a > >> constant-impedance connector, the term "UHF" is laughable, however > >> much the connector may have outperformed whatever it replaced. > >> > >> (b) is just a marketing problem -- the connector works fine at HF. > >> > > > > I have used them at 430MHz with a substantial amount of power (tens of > > watts). Nothing got hot, VSWR was fine. > > > > > >> (a) is just a training problem -- given an iron with enough thermal > >> mass those things solder up just fine. > >> > > > > Yes, you need big bertha to do that. 150W is sort of a minimum, I > > prefereed a 500W iron for that, it was faster. > > > I have one that's only 200W or so, but it's HUGE. It takes a long time > to heat up, but the tip is about 3/8" diameter solid copper two inches > long -- so it retains the heat really well, too. So does an open flame from a gas stove or propane torch. :) -- Anyone wanting to run for any political office in the US should have to have a DD214, and a honorable discharge.
From: Joerg on 27 May 2010 19:51 Tim Wescott wrote: > On 05/27/2010 03:02 PM, Joerg wrote: >> Tim Wescott wrote: >>> On 05/27/2010 01:00 PM, Joerg wrote: >>>> Tim Wescott wrote: >>>>> On 05/27/2010 11:14 AM, Tauno Voipio wrote: >>>>>> Joerg wrote: >>>>>>> Tim Wescott wrote: >>>>>>>> I want to make some custom cables for battery testing to plug >>>>>>>> into my >>>>>>>> Fluke meter. I'd really rather use the nifty shielded banana plugs >>>>>>>> like Fluke uses, to reduce the chances of inadvertently frying a >>>>>>>> battery. >>>>>>>> >>>>>>>> Anyone know a source other than Pomona, which wants an arm and a >>>>>>>> leg? >>>>>>>> >>>>>>> >>>>>>> I don't know what an arm and a leg goes for these days, and I've not >>>>>>> bought anything myself there so far, but here is one vendor: >>>>>>> >>>>>>> http://www.testpath.com/Categories/Banana-Plugs-4mm-Shrouded-Straight-In-line-2940.htm >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>> Hint for your web searches: The popular term is shrouded banana >>>>>>> plug, >>>>>>> not shielded. >>>>>>> >>>>>> >>>>>> A shielded banana plug is called PL 259, also UHF connector. >>>>>> >>>>> By construction that's not really a banana plug -- banana plugs have >>>>> the spring on the plug, not the socket -- but you've certainly >>>>> captured the level of sophistication of the PL-259 and its close >>>>> relatives! >>>>> >>>> >>>> It has been much maligned but I have to say that the PL-259 has always >>>> been good to me. You can safely get a kilowatt across. Plus banana plug >>>> fit into the socket, in a pinch. >>> >>> The only two strikes that I see against it is that (a) it can be hard >>> to solder correctly, and (b) in light of the performance of a >>> constant-impedance connector, the term "UHF" is laughable, however >>> much the connector may have outperformed whatever it replaced. >>> >>> (b) is just a marketing problem -- the connector works fine at HF. >>> >> >> I have used them at 430MHz with a substantial amount of power (tens of >> watts). Nothing got hot, VSWR was fine. >> >> >>> (a) is just a training problem -- given an iron with enough thermal >>> mass those things solder up just fine. >>> >> >> Yes, you need big bertha to do that. 150W is sort of a minimum, I >> prefereed a 500W iron for that, it was faster. >> > I have one that's only 200W or so, but it's HUGE. It takes a long time > to heat up, but the tip is about 3/8" diameter solid copper two inches > long -- so it retains the heat really well, too. > I have two from grandpa. Copper tips of about two cubic-inches at the end of a stick, with a wooden handle. You make a nice wood fire, have a beer, roast some marshmallows, and when it's down to glowing coals put them in there. Those even work during a power outage :-) -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM.
From: Joerg on 27 May 2010 19:56
Joel Koltner wrote: > "Joerg" <invalid(a)invalid.invalid> wrote in message > news:8688frFe67U1(a)mid.individual.net... >> Yes, you need big bertha to do that. 150W is sort of a minimum, I >> prefereed a 500W iron for that, it was faster. > > I normally use one of those really small blowtorches (like the ones that > use cigarette lighters for their source of gas) -- the small size makes > them rather more maneuverable than a big iron. > > Oh, plus I'm cheap at times and the good quality big irons are spendy. :-) > And one can light a stogie with it, or light the starter chimney for the barbecue later on :-) The 150W iron I have is from Ersa, it wasn't very expensive, under $50 AFAIR. What I found to be quite good as well is the Weller 100/140W solder gun. Those are really cheap. I often ran into "not enough solder oomph" situations at clients and then we did a hardware store detour at lunchtime and bought one. Around $20, usually. -- Regards, Joerg http://www.analogconsultants.com/ "gmail" domain blocked because of excessive spam. Use another domain or send PM. |