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TC1 board

 

I picked up a nice FT-817 at a hamfest over the weekend.? I just opened it up to see if any options were installed.? In the TCXO area is a board that has TC1 printed on it.? I've spent some time searching and I don't find any reference to a TC1.? What I do find is the TCXO-9.? Is the TC1 the non-temperature controlled version??

Photo attached.

Thanks!

-Farren / KB0AZJ
 

Hi yes this is the STD one that is fitted from the factory,
Dave

On Mon, 3 Oct 2022, 16:59 Farren Constable, <farren@...> wrote:
I picked up a nice FT-817 at a hamfest over the weekend.? I just opened it up to see if any options were installed.? In the TCXO area is a board that has TC1 printed on it.? I've spent some time searching and I don't find any reference to a TC1.? What I do find is the TCXO-9.? Is the TC1 the non-temperature controlled version??

Photo attached.

Thanks!

-Farren / KB0AZJ
 

¿ªÔÆÌåÓý

Farren:

The TC-1 is the "standard" (not temperature-compensated) FT-817 crystal oscillator.

Mike Dinolfo?? N4MWP

On 10/3/22 11:55, Farren Constable wrote:

I picked up a nice FT-817 at a hamfest over the weekend.? I just opened it up to see if any options were installed.? In the TCXO area is a board that has TC1 printed on it.? I've spent some time searching and I don't find any reference to a TC1.? What I do find is the TCXO-9.? Is the TC1 the non-temperature controlled version??

Photo attached.

Thanks!

-Farren / KB0AZJ
 

Thanks!

Is it still possible to buy a TCXO?? If so, where?

I did luck out I think -- it has a Collins Mechanical Filter in it -- the CW one as near as I can tell -- which seems to be worth about what I paid for the radio!? Numbers on it are 526-8686-010.? From what little I've read so far, that helps with some of the narrow digital modes as well -- correct?

-Farren
 

Is this a good option for a TCXO for the 817?



-Farren
Jeremy Harmer
 

The TCXO-9 is always out of stock here (UK) - NB people say to avoid eBay specials

WIMO have them:

Jeremy
M0RVB

On 3 Oct 2022, at 18:02, Farren Constable <farren@...> wrote:

Thanks!

Is it still possible to buy a TCXO? If so, where?

I did luck out I think -- it has a Collins Mechanical Filter in it -- the CW one as near as I can tell -- which seems to be worth about what I paid for the radio! Numbers on it are 526-8686-010. From what little I've read so far, that helps with some of the narrow digital modes as well -- correct?
Marek Szuba
 

On 2022-10-03 18:04, Farren Constable wrote:

Is this a good option for a TCXO for the 817?
Opinions vary on whether the Chinese units are worth using. While it is
generally agreed upon that they do improve frequency stability,
apparently quite a few - if not most - of them visibly increase the
noise floor.

If I were you, I would either grab one of the really cheap Chinese
modules or go for the original TCXO-9. Unless, perhaps, if you can find
someone with exactly the same Chinese module who has thoroughly tested
it AND could test your unit once it has arrived.

--
Marek M0JUR
 

Buy the original, despite its price, it's worth it.
The Chinese are a source of noise.

Jose - EA4YD


El lun, 3 oct 2022 a las 20:30, Marek Szuba via (<marek.szuba=[email protected]>) escribi¨®:
On 2022-10-03 18:04, Farren Constable wrote:

> Is this a good option for a TCXO for the 817?

Opinions vary on whether the Chinese units are worth using. While it is
generally agreed upon that they do improve frequency stability,
apparently quite a few - if not most - of them visibly increase the
noise floor.

If I were you, I would either grab one of the really cheap Chinese
modules or go for the original TCXO-9. Unless, perhaps, if you can find
someone with exactly the same Chinese module who has thoroughly tested
it AND could test your unit once it has arrived.

--
Marek M0JUR
 

On Mon, 3 Oct 2022 18:06:23 +0100
"Jeremy Harmer via groups.io" <m6igp@...> wrote:

The TCXO-9 is always out of stock here
Also note that the TCXO-9 originally had a TCXO module designed to run
from 5V, later TCXO-9s changed this to one intended to run from 3V but
5V tolerant. This has the disadvantage that the compensation is no
longer ideal. The old module part number is NTO-801, the new one is
TTS01.

I modified my TCXO-9 with a low-noise 3V LDO surface mount regulator
with some extra decoupling, it gave better warm-up and long-term
stability behaviour.

--

Brian Morrison G8SEZ
 

Really why would one want a TCXO for the FT817/8, one uses the VFO to tune. And I would not commit my FT817 to any service that needs it, there are much better ways to go.

But to each their own.

73, ron, n9ee/r

Ron Wright, N9EE/R
Hernando Co ARES EC
Spring Hill, Florida also n9ee55@...


On Tuesday, October 4, 2022 at 10:54:55 AM EDT, Brian Morrison <bdm@...> wrote:


On Mon, 3 Oct 2022 18:06:23 +0100
"Jeremy Harmer via groups.io" <m6igp=[email protected]> wrote:

> The TCXO-9 is always out of stock here

Also note that the TCXO-9 originally had a TCXO module designed to run
from 5V, later TCXO-9s changed this to one intended to run from 3V but
5V tolerant. This has the disadvantage that the compensation is no
longer ideal. The old module part number is NTO-801, the new one is
TTS01.

I modified my TCXO-9 with a low-noise 3V LDO surface mount regulator
with some extra decoupling, it gave better warm-up and long-term
stability behaviour.

--

Brian Morrison? G8SEZ
 

On Tue, 4 Oct 2022 16:10:37 +0000 (UTC)
"Ron Wright via groups.io" <lt_wright_flg@...> wrote:

Really why would one want a TCXO for the FT817/8
Yaesu provided the option, they clearly felt it was a good thing to
have. If you use the radio with WSJTX or similar then frequency
accuracy is important, as it is with satellites and listening to weak
beacons.

Some people only have one radio which they use for lots of different
purposes. It makes sense to get the best performance possible from it.

--

Brian Morrison G8SEZ

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