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If you are talking about HF amateur radio sets then no they're not unless they're fitted with a TXCO which many of those used on 11m are not. My Kenwood TS480SAT, brand new, was roughly off by the same as you claim your radio is, so was my TS590S. The only amateur radios I've had which have been "accurate" are those which have had TXCOs fitted either as standard or I've added. My TS480SAT now has a TXCO fitted and its still 8Hz off.

It costs a lot of money and the use of something like a Rubidium Frequency Reference Standard or GPS disciplined oscillator to get the kind of accuracy you are expecting on here. On CB/11m and even amateur radio unless you're doing stuff like using below the noise floor modes like JT65 where frequency and timing accuracy is absolutely critical then it is simply not needed. Within 100-200Hz is more than sufficient especially for channelised modes on AM and FM. On SSB you can't be sure that both ends in a contact are anywhere near accurate so even if you fix yours spot on you're going to find yourself in the same situation because the other station won't be.

Whatever you do though don't lock the clarifier to do both TX and RX because you end up in the daft situation if you both have where you're just chasing each other up and down 10kHz because you'll adjust yours to take into account his "off frequency" signal which also moves your transmit frequency so then he adjusts his clarifier to account for your sudden change in TX frequency which then alters his TX frequency so you re-adjust yours etc etc etc. Thats the reason that CB manufacturers only have the clarifier work on RX only.

<blockquote data-quote="M0GVZ" data-source="post: 553651" data-attributes="member: 22312">If you are talking about HF amateur radio sets then no they&#039;re not unless they&#039;re fitted with a TXCO which many of those used on 11m are not. My Kenwood TS480SAT, brand new, was roughly off by the same as you claim your radio is, so was my TS590S. The only amateur radios I&#039;ve had which have been &quot;accurate&quot; are those which have had TXCOs fitted either as standard or I&#039;ve added. My TS480SAT now has a TXCO fitted and its still 8Hz off.It costs a lot of money and the use of something like a Rubidium Frequency Reference Standard or GPS disciplined oscillator to get the kind of accuracy you are expecting on here. On CB/11m and even amateur radio unless you&#039;re doing stuff like using below the noise floor modes like JT65 where frequency and timing accuracy is absolutely critical then it is simply not needed. Within 100-200Hz is more than sufficient especially for channelised modes on AM and FM. On SSB you can&#039;t be sure that both ends in a contact are anywhere near accurate so even if you fix yours spot on you&#039;re going to find yourself in the same situation because the other station won&#039;t be.Whatever you do though don&#039;t lock the clarifier to do both TX and RX because you end up in the daft situation if you both have where you&#039;re just chasing each other up and down 10kHz because you&#039;ll adjust yours to take into account his &quot;off frequency&quot; signal which also moves your transmit frequency so then he adjusts his clarifier to account for your sudden change in TX frequency which then alters his TX frequency so you re-adjust yours etc etc etc. Thats the reason that CB manufacturers only have the clarifier work on RX only.</blockquote>

[QUOTE="M0GVZ, post: 553651, member: 22312"] If you are talking about HF amateur radio sets then no they're not unless they're fitted with a TXCO which many of those used on 11m are not. My Kenwood TS480SAT, brand new, was roughly off by the same as you claim your radio is, so was my TS590S. The only amateur radios I've had which have been "accurate" are those which have had TXCOs fitted either as standard or I've added. My TS480SAT now has a TXCO fitted and its still 8Hz off. It costs a lot of money and the use of something like a Rubidium Frequency Reference Standard or GPS disciplined oscillator to get the kind of accuracy you are expecting on here. On CB/11m and even amateur radio unless you're doing stuff like using below the noise floor modes like JT65 where frequency and timing accuracy is absolutely critical then it is simply not needed. Within 100-200Hz is more than sufficient especially for channelised modes on AM and FM. On SSB you can't be sure that both ends in a contact are anywhere near accurate so even if you fix yours spot on you're going to find yourself in the same situation because the other station won't be. Whatever you do though don't lock the clarifier to do both TX and RX because you end up in the daft situation if you both have where you're just chasing each other up and down 10kHz because you'll adjust yours to take into account his "off frequency" signal which also moves your transmit frequency so then he adjusts his clarifier to account for your sudden change in TX frequency which then alters his TX frequency so you re-adjust yours etc etc etc. Thats the reason that CB manufacturers only have the clarifier work on RX only. [/QUOTE]

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