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#21
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![]() "Rob" wrote in message ... I don't like them because there appears to be no chassis version and I like to have a distribution box where everything can be connected, vs a big tangle of wires with connectors in the middle. There are ways to to mount them to a chassis, but it seems expensive for the way they are made. |
#22
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On 01/18/2016 07:13 PM, gareth wrote:
"gareth" wrote in message ... All is rosy now in the garden,and thanks for suggestions. Now, all I need is a 1/4" or so plug and socket so that I can quickly attach the ground terminal to whichever rig is now powerpoled to the ATU and the PSU. I'm using the green/yellow 10mm sq stuff used for earthing in Brit, and 'tis a bit unwieldy to keep fiddling with the wing nut attachment on the back of each rig. Shack is upstairs, front bedroom, earth is ground stake and a fan of microbore tubing apread out over the front lawn. House earth is a TT installation so no probs with PME, etc. ========= RF earth for an upstairs shack can be effectively done with an "earth tuner" e.g. a series tuned variable C /variable inductor with a RF current sensor ie wound toroid/ diode /mA meter and potmeter, having say the inductor end connected to a random length of wire running on the floor in the room (under carpet ) The tuner needs to be adjusted for max RF current (low impedance). Only disadvantage compared with a straight earth wire into the ground is the requirement to retune when changing frequency. The above is often used in apartment buildings where a direct earth wire is not practical. I made such a tuner myself for demonstration puposes ,but MFJ make them (Artificial Ground Model MFJ-931) See also Practical Wireless Mag , October 1990 ,page 21) for home brewing. Frank , GM0CSZ / KN6WH |
#23
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"gareth" wrote in message
... Now, all I need is a 1/4" or so plug and socket so that I can quickly attach the ground terminal to whichever rig is now powerpoled to the ATU and the PSU. .... and I'm not thinking straight, because the obvious answer is 45 amp GREEN powerpoles !!! Doh! |
#24
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![]() "Brian Reay" wrote in message ... There are at least two types. One is simply a couple of E shaped metal plates. The centre of the E goes into the small hole, the connector body fits in the gaps. You can stack connectors and put one plate at each end. This type are very cheap. I don't think I have seen that kind, or if I did only one set of the PPs were installed that way. I would like for someone to come out with about 8 or 10 sets on a plate for cheap price, not the $ 50 or more for them that I have seen. Years ago I made up a plate to go on the back of my radio desk which resembles a computer desk that has several sets of bannana jacks on it that works ok, but have to just use wires or the spade lugs on it. |
#25
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"Brian Reay" wrote in message
... I normally solder but place a cable tie near the connector, where the wires part, and under the boot. This helps prevent the last section of wire before the connector being flexed (you can see it if you try the idea), which is the area where, as you say, the wire may break due to the wicked solder. Do you mean putting the cable tie in longitudinally to stiffen the wires, or to rgip the wires to the shroud? |
#26
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"gareth" wrote:
I'm not thinking straight Story of your life, OM. -- STC // M0TEY // twitter.com/ukradioamateur |
#27
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gareth wrote:
hereas the G0HWC websire recommends a roll pin to stop the black and red pair separating, and others have decried that lest the pin falls out and causes an electrical short So why not buy the Red+black housings that have been ultrasonically welded together in the factory? |
#28
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In article "Ralph Mowery" writes:
"Bob Wilson" wrote in message ... I have been only soldering them for some years. I saw in a recent QST article that you really must crimp them, but no reason given for why. I find doing it with solder (a) makes it a lot easier to keep the "hollow end" of the PowerPole round so that it fits easily in the plastic cover and (b) also makes them fairly easy to take apart without damage so that I can reuse the PowerPole. (I do have a fancy, fairly professional, set of crimping tools, but I also found the terminals frequently got "squished" out of shape." Bob Wilson Crimping works well if the correct type of tool is used. I have an inexpensive crimper that is made for the power poles and have no problem with them. Is that set you have made especially for the power poles ? Stranded wire is recommended to be crimped because if it is soldered it becomes the equal of a solid wire where the solder wicks up the wire and if flexed or bent many times it may break. If you don't worry about the wire breaking then soldering is fine. Solid wire does not crimp well. Not only does solder wick up the stranded wire and make it non-flexible and prone to breakage, it also causes it to torque the actual connector inside the housing to make poorer connections if the cable has side force or twist on it. Also, there is the very high risk of wicking solder up on the active sliding contact, covering the silver contact with a tin/lead one, reducing the contact quality. The crimp tool is faster, allows getting the ends on straight (so they are not torqued in the housing), and does a better job. Alan |
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