Hi,

I bought and installed the Chinese version of the TCXO.  I have had no 
problems, but I've read that others have had problems with noise and 
instability.  All that I know is that since I installed the TCXO, the 
drift in mhy 590 has disappeared and its right on frequency with no 
aditional noise, but I do not own any high priced frequency analyzer. .

73,

Bob, K8LR, [log in to unmask]
  

On 1/16/2016 3:24 PM, Steve Forst wrote:
> Doug,
>
> Don't know what is considered "acceptable for the 590, but  the TCXO for
> higher frequency stability is  optional (was standard on the TS-2000).
>    There was a long recent thread on the TS-590 list about the
> risks/rewards of buying the knockoff TCXO board from China as opposed to
> the expensive  unit from Kenwood.    I *think* the Kenwood part has to
> be soldered in, while the Chinese knockoff is a plug-in replacement board.
>
> I think someone from this list went the Chinese route, but I'm not 100
> percent sure, so I won't out him here.
>
> 73, Steve KW3A
>
> On 1/16/2016 3:06 PM, Doug Payne wrote:
>> Hello,
>>
>>
>>
>> I've noticed my TS 590S is slightly off frequency, that is, the display
>> frequency does not match the receive frequency. The discrepancy worsens as
>> the frequency increases. From what I can tell from zero-beating WWV on SSB,
>> and listening to other sideband signals on 50.125 mHz, it seems to be low by
>> about 40 hz on 15 mHz, and by about 120 hz on 50.125 mHZ. Has anyone else
>> experienced this with their Kenwoods? If so, how did you address this?
>>
>>
>>
>> Thanks,
>>
>> Doug,
>>
>> AC7T
>>