My first /P session didn't go too well. I set up on a hillside overlooking the sea in North Devon with a JPC-12 vertical antenna. On 40m I coud hear plenty of stations around the UK, France and Germany. My CQ calls went unanswered and after an hour of monitoring QSOs around the country my NiMH battery had dropped from 10.2V to 7.6V and the radio switched off.

This was partly due to me using the loudspeaker, but clearly I need a better battery.

Is there a higher capacity battery pack that will fit in the compartment so I can still use the leather case?

Also any recommendations for a good set of portable headphones?

Mike G8GYW

Hello,

sorry to bother here just I would like to kindly invite you to join our new Yaesu FT-818 users group here on Groups.

Uncensored, unmoderated group for Yaesu FT-818 radio enthusiasts, fans, owners and users.

Narrow co-operation and beeing in touch with this famous?[email protected]?members is welcomed, helping and smart …as same as co-operation with FT-817/FT-818 owners group on MeWe.

Please join us here:
[email protected]

/g/ft-818

Best regards,
73 - Petr, OK1RP

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

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

On Mon, Oct 3, 2022 at 01:45 PM, mike z wrote:

I used a Yaesu ATAS 25, which looks similar. Sliding coil, adjustable whip. Very touchy to tune at times, heavily dependent on the radial system. I was able to "fine tune"? the SWR to less than 1.5:1 by adjusting the length of, number of,? and the location of the radials. Using a tuner before getting the antenna as close as possible has never appealed to me.
Easier to tune with an antenna analyzer rather than the 817's SWR meter.
Mike N3PM

Hi Mike, yes I have a VNA for that purpose. Will be working /P later this week.

Mike

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

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

WIMO have them:

Jeremy
M0RVB

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



-Farren

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

开云体育

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

I used a Yaesu ATAS 25, which looks similar. Sliding coil, adjustable whip. Very touchy to tune at times, heavily dependent on the radial system. I was able to "fine tune"? the SWR to less than 1.5:1 by adjusting the length of, number of,? and the location of the radials. Using a tuner before getting the antenna as close as possible has never appealed to me.
Easier to tune with an antenna analyzer rather than the 817's SWR meter.
Mike N3PM

Thanks Al.

I did have an LDG tuner for this rig but as I wasn't planning any portable work at the time I sold it ...

I've bought a JPC-12 vertical which is <1.5:1 at 7MHz but higher on the higher frequencies.

Mike G8GYW

The radio will alert you when the SWR is too high and it will back down during that condition.? I just found a tuner kit on Amazon for $35 and the enclosure for another $35.? It looks good so far but I haven't finished the wiring yet.? It appears to very close inside to the little elecraft auto tuner that I repaired for a friend a while back.? It says it will handle up to 100 watts while operating.? It is about the size of the battery pack.
--
Al Skierkiewicz
WB9UVJ

On Fri, Sep 30, 2022 at 12:05 PM, Brian Morrison wrote:

On Fri, 30 Sep 2022 01:42:36 -0700
"Mike" <mail@...> wrote:

When charging the NìMH battery pack what happens when the timer runs
down to zero - does it stop charging?

It reverts to trickle charge rate, which is supposed to maintain the
battery fully charged if unused.

--

Brian Morrison G8SEZ

Thanks Brian.

Mike G8GYW

On Fri, 30 Sep 2022 01:42:36 -0700
"Mike" <mail@...> wrote:

When charging the NìMH battery pack what happens when the timer runs
down to zero - does it stop charging?

It reverts to trickle charge rate, which is supposed to maintain the
battery fully charged if unused.

--

Brian Morrison G8SEZ

I've had my 817ND for a few months now but only operated as a fixed station. I plan to go /P soon and would like to know:

What is the maximum SWR the TX will tolerate without an ATU?

When charging the NìMH battery pack what happens when the timer runs down to zero - does it stop charging?

Thanks,

Mike