how would i go from f type connector on the scantenna to lmr 400 with a pl259 end on it with out losing the gain of the the antenna pluse the good coax trying not to lose to much single in the system so i am keeping out as many conectors as possible.
How to go from f connector on scantenna to lmr 400 cable
- Thread starter mattl3320
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Keith_W7KEW
Member
Without going a N connector route which would provide the least loss you could order
#3111 (F to PL259 Female)
#2791 (PL-258)
S0239 PL259 Adapters
#3111 (F to PL259 Female)
#2791 (PL-258)
S0239 PL259 Adapters
Keith_W7KEW
Member
Hmm you could also go with #2814 (SO-239 to F) instead I just noticed that. you would just need a male to male F adapter connector to hook up the two female connectors
K
kb0nly
Guest
The 2814 is exactly what he needs, its an SO-239 (UHF Female) to an F type Male... Have used them before.
W2NJS
Member
Cut the F connector off the cable and solder on a PL259. It's not all that difficult to do.
The scantenna has an F on it as the connection type. He is trying to go from LMR400 to an antenna with an F. I don't think he's talking about modding the RG cable that comes with it.
majoco
Stirrer
W2NJS said:
Other way round, mate!
But I'm with you, put the proper connector on the cable. How many times have adaptors worked loose and fallen off at the critical time!
Other way round, mate!
But I'm with you, put the proper connector on the cable. How many times have adaptors worked loose and fallen off at the critical time!
K
kb0nly
Guest
You can't get an F type connector for LMR400 though.
The best he can do is use an adapter, or make a pigtail with a SO-239 on one end and a F on the other to go to the antenna. I have made a few pigtails of this type for scanner use, buy an inline UHF Female, solder center pin and crimp shield, then put an F on the other end. Myself i would go better than a UHF, an N connector would be my choice, but either way your going to have to adapt since the antenna has an F connector on it.
Times Microwave makes F connectors for LMR400-75ohm coax; it is possible to 'modify' it to work with LMR400-50ohm coax?
K
kb0nly
Guest
Interesting, didn't know they made those, i saw them in the catalog but it looked like a Mini-UHF when i passed over its picture.
Since this is a receive only install i see no problem with using that connector, its not an impedance issue in this case. But you will need a good coax crimper to install it.
On most LMR Connectors you will likely need to get a specific connector fron the cable maker (Times Mirrow, etc..) as otherwise you might see poor response (loss). While some connectors 'appear' to fit well, we have seen many that cause 3-6 db loss, over time, especially if outside use. Also, some of the LMR connectors have different crimpers now, and have seen issues in that area too...lose fits so if you are crimping ensure you have the right crimper....
The net is if you use sub-par connectors, don't be surprised if in a couple of years you have to rework the cables and connectors....
The net is if you use sub-par connectors, don't be surprised if in a couple of years you have to rework the cables and connectors....
The center conductor is smaller on the 75ohm LMR400 and the center pin will not fit 50ohm cable unless you drill it out.
I would have gone for a run of RG-11 coax with F connectors at both ends and an F to PL259 or whatever at the radio end.
prcguy
I would have gone for a run of RG-11 coax with F connectors at both ends and an F to PL259 or whatever at the radio end.
prcguy
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