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Wouxun 5.00K to 2.500K
- Thread starter dksac2
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DaveNF2G
Guest
In what band would you need a 2.5 kHz step?
nd5y
Member
From what I have read only certain firmware versions have 2.5 kHz synthesizer steps and you can't add it to a version that doesn't have it.
2.5 kHz steps are required for programming most of the 7.5 kHz splinter VHF channels used in the US.
2.5 kHz steps are required for programming most of the 7.5 kHz splinter VHF channels used in the US.
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DaveNF2G
Guest
Then what you need is a 7.5 kHz step size to comply with the bandplan, right? If the radio has 15 kHz step sizes already, then cutting that in half seems like a relatively simple software (or maybe firmware) update.
nd5y
Member
No. VHF radios need 2.5 kHz synthesizer steps. Most of the FCC allocated channels in the 150-162 MHz band are spaced 7.5 kHz from eachother but not in 7.5 kHz steps continuously from one end of the band to the other.
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nd5y
Member
You can see this by making a spreadsheet with 150.775 in the first cell and incrementing .0075 up to 162.0, then compare that to the FCC allocation tables at
eCFR — Code of Federal Regulations
and
eCFR — Code of Federal Regulations
There is not continuous 7.5 kHz spacing in the 150.775-150.995 and 154.4525-154.65 ranges and I think a couple of other areas if I remember right.
eCFR — Code of Federal Regulations
and
eCFR — Code of Federal Regulations
There is not continuous 7.5 kHz spacing in the 150.775-150.995 and 154.4525-154.65 ranges and I think a couple of other areas if I remember right.
nd5y
Member
If you set the a radio to 6.25 or 12.25 kHz steps then a few of the 7.5 kHz channels like 151.1375 will fall on multiples of 6.25.
rfradioconsult
Member
The KG-UV6X will do 2.5 KHz steps.
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