It is temperature controled crystal oscilator.  Very very stable.
73
Butch
WA0VJR
Node 3148
Wallace, ks.


On Fri, 
9 Aug 2013, Howard Traxler wrote:

> What is a T C X O; what does it do?
> Thanks & 73,
> The Other Howard, WA9RYF
> ----- Original Message -----=20
> From: "Butch Bussen" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Thursday, August 08, 2013 10:18 PM
> Subject: Re: ts590
>
>
>> One thing I would recommend is the optional t x o for frequency =
> stability.=20
>> I think Kenwood made a big mistake in the way this has to be =
> installed.=20
>> You remove a small board from the rig and solder the optional t c x o =
> onto=20
>> this board.  If you want this, it would cost extra, but well worth it =
> in=20
>> my opinion.  I don't recall what the t c x o cost, $90 I think.  That =
> rig=20
>> is absolutely rock stable now.
>> 73
>> Butch
>> WA0VJR
>> Node 3148
>> Wallace, ks.
>
>