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 RF Choke coax

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26CT231ANDY
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Call Sign : 26-CT-231
Posts : 38
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Join date : 2019-08-11
QTH or Location : Cambridge
Equipment Used : Linoln 2

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PostSubject: RF Choke coax    RF Choke coax  Icon_minitimeSat Feb 24, 2024 3:27 pm

Hi All

Looking to make an REF Choke to hope in reducing some of the noise on my radio, which is the best coax to use.. confused

Thank you...  cheers
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SangueG
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SangueG


Call Sign : 26-CT-3971 / 2E0LMI
Posts : 1220
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Join date : 2021-01-30
QTH or Location : Cirencester, Gloucestershire
Equipment Used : Little radios, home-made antennas

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PostSubject: Re: RF Choke coax    RF Choke coax  Icon_minitimeSat Feb 24, 2024 4:08 pm

Is it for 11m? I have one I made for 11m and the close by bands. I used RG58 as it was easy to coil up. I only have RG58 and RG213 here to use, and the RG213 I have was not pliable enough to get into a coil.

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https://station-master.online/2E0LMI
peewee norfolk
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peewee norfolk


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PostSubject: Re: RF Choke coax    RF Choke coax  Icon_minitimeSat Feb 24, 2024 9:40 pm

hi Andy im the same above i used rg58 as had that to hand and like allready said rg213 would be better but dam hard to bend, i used a bit of soil-pipe off cut to make it then cable ties, works great !!

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Ivy Mike
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PostSubject: Re: RF Choke coax    RF Choke coax  Icon_minitimeSun Feb 25, 2024 8:34 am

If the 'ugly balun' does not do it.

9 turns of RG142 on an FT240-31 toroid, will give good choking, >2k ohms at 3.5-30MHz

All the bits needed to make one are available from Hamgoodies.co.uk.

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PostSubject: Re: RF Choke coax    RF Choke coax  Icon_minitime

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