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eHam Forums => Elmers => Topic started by: KC9PWT on January 13, 2010, 05:13:16 PM



Title: tcxo-9 and yaesu 857d
Post by: KC9PWT on January 13, 2010, 05:13:16 PM
i was thinking about installing a tcxo-9 in my radio, anyone done this is?

alex


Title: RE: tcxo-9 and yaesu 857d
Post by: K4KRW on January 13, 2010, 05:25:09 PM
If your radio is an FT-897D, it already has it.

From Yaesu's web site:

The new FT-897D version includes coverage of the U.S. 60-meter (5 MHz) band, along with the 0.5 ppm TCXO Unit, at no additional charge!

Here is the link to the page.
http://www.yaesu.com/indexVS.cfm?cmd=DisplayProducts&ProdCatID=102&encProdID=0372FA803B7BBADBF3076C94ACA7A8C5&DivisionID=65&isArchived=0

73,

Richard
K4KRW


Title: RE: tcxo-9 and yaesu 857d
Post by: K4KRW on January 13, 2010, 05:28:20 PM
My apologies for the previous post.
I saw 857D and thought 897D.

73,

Richard
K4kRW


Title: RE: tcxo-9 and yaesu 857d
Post by: PE1HZG on January 14, 2010, 02:50:53 AM
The modification itself is easy enough: open top, remove module on the far right, replace with TCXO module, close lid.

The question is why you'd want the TCXO. It is for higher frequency stability, especially with changing environment temperatures. That assumes A. you're operating in changing temperatures (mobile, portable, outdoors) and B. you use modes that need this stability, think of PSK31 or similar: FM and SSB don't need it.

I have several 5x7 radios, both with and without TCXO's and I have not found a strong need to equip all my radios with TCXO's. My 817 (non-ND) has TCXO, but I bought it so I'd have stability (for testing purposes) outside, never found a need for that.

So, to answer a question with a question: why do you think you need the TCXO module?

Oh, and if you're not sure you already have it: the regular xtal oscillator looks like a small PCB with SMD components on it, the TCXO looks like a PCB with a small metal box on it, with a hole for adjustment.

73,

Geert Jan


Title: RE: tcxo-9 and yaesu 857d
Post by: G8JNJ on January 14, 2010, 02:56:26 AM
Hi Alex,

See a previous thread

http://www.eham.net/forums/Elmers/79795

Regards,

Martin - G8JNJ

www.g8jnj.webs.com


Title: RE: tcxo-9 and yaesu 857d
Post by: KC9PWT on January 14, 2010, 03:46:20 AM
i want to get into digital and some of the modes will be enhanced with this tcxo.

alex


Title: RE: tcxo-9 and yaesu 857d
Post by: WA6BJH on January 14, 2010, 04:18:11 AM
I have the TCXO in my 857D that I have installed in my car.  I think it's a good idea.  

It can't hurt.

73
Kerry


Title: RE: tcxo-9 and yaesu 857d
Post by: WA3SKN on January 14, 2010, 06:03:11 AM
I have heard that the airflow in the ft857 routes over the finals to where the txco9 is mounted, so the stability is not as improved as in the ft897.
How much better or not I do not know.  It is an easy install, though.
73s.

-Mike.