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LMR-400 on my base connectors just fit.

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LMR-400 on my base connectors just fit.

#140343

Post by bullet »

I don't know if this is the right place for this post. Sorry if it is not.
I purchased some LMR-400 on ebay. The seller told me it would be Times Microwave and the coax has time microwave all over it. He told me I could send it back if I though other wise. I got 140 feet for $114.00. If you would like some LMR-400 pm me and I will get the ebay seller info.
The thing I was worried about is the intercore of the LMR-400 would barely fit in the connector.(big pl59) I was not able to get any solder in the connector due to the middle core being so large. I did solder all four spots on the shielding. Do y'all think this will be good enough. The connector also screwed on the outer weatherproof plastic.
Thanks Ron
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#140347

Post by bullet »

I forgot I had to N type connectors. If they can be reused I will drop them in the mail. I also got a 90 degree n connector. If anyone as use for them PM me with you address I will ship them your way.
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#140374

Post by bullet »

can anyone help me
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Gearhead815
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#140461

Post by Gearhead815 »

Yes, there will be very little space between the center conductor and the inside of the pin. You shouldn't have any problem soldering it, though. It's just like soldering or "sweating" plumbing pipes together. Just hold the soldering iron tip to the end of the connector's pin and feed solder into the area where the wire and pin meet. When it starts to melt, it will suck it into the gap.
I just made 4 LMR 400 jumpers yesterday, so it's pretty fresh in my mind 8)
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80 meter man
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#140464

Post by 80 meter man »

Just like Gearhead said it will be just like soldering a coppper pipe joint. Have you ever seen how tight coppper pipes and there fittings fit together? It looks deceiving but you will have a stronger joint with your set up than if there were more space. The more coppper and the less solder the better. You want that tight fit. It will work great for you. You can dress the end where you soldered with a file if any solder was left on the tip or outside of the pin.
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TwentyTwo-Zero
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#140502

Post by TwentyTwo-Zero »

Hi bullet,

As previously stated, the inner conductor and the end pin should have a snug fit, but the solder will penetrate and bond them.
A little "trick" I use (that you might use if/when you install connectors in the future) is I "tin" the inner conductor prior to installing the connector. This keeps all the strands together as they feed into the end pin and a quick application of heat to the end of the pin creates a secure bond. :wink:

BTW - nice score on the LMR-400 - that's a great price! 8)
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WR0220 Washington State 38LSB
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Gearhead815
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#140513

Post by Gearhead815 »

I tin my shield a little by tinning the iron tip, then rubbing it across the braid, repeating the process until I make it all the way around. I'm not sure about his, but my LMR400 has a solid inner conductor.
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#140518

Post by TwentyTwo-Zero »

Gearhead815 wrote:I tin my shield a little by tinning the iron tip, then rubbing it across the braid, repeating the process until I make it all the way around. I'm not sure about his, but my LMR400 has a solid inner conductor.
Yep - you are correct - the LMR-400 has a solid center conductor. The LMR-400UF (which I use) has a strand center conductor. Either way, if you tin the center conductor prior to installing the connector it makes soldering them much easier. I also tin the braid before installing the connector, but was thinking more of the center conductor since that is what he was talking about. Good point! :wink: I posted a "how to" on soldering connectors in the "radio 101" section a few weeks back, but I don't know if it is still there since they locked that section...
Save Your Money, Don't Go To The Show
And Don't You Eat That Yellow Snow...Frank Zappa
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WR0220 Washington State 38LSB
CPI • Cobra • Icom • Yaesu
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#140582

Post by bullet »

Thanks guy for the feedback. I just had to let the tip get a little hotter an I did and it sucked it right up.
Thanks again.
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