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tune for peak DC input AMPERAGE

(I assume you mean "input" into the antenna.) This would agree with what
I've seen since putting a wattmeter/swr meter in line -- highest tx output
often does not occur at lowest swr.

73
John Newell
KB1FPM





































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I too get the "not a member" denial when trying to access the files-- as
noted by Dave below, seems puzzling given that I get the list messages.
Anyone got any solutions or work-arounds? am I doing something clueless?

John scrived (about a 12VDC-120VAC inverter):

It's a 10-year old model, so maybe there are better designs....

I keep half an eye on the alternative power scene, and my
understanding is that they still draw a pretty hefty "phantom load"
with nothing connected. Just like most every modern consumer-
electroncis device....

Doug,
I have several 500hz Collins filters for sale. I built these filters identical to the ones supplied by Yaesu, you can't tell them a part. $110 CONUS ppd
Jim (k8drn@...)

In response to Chip's suggestions on tuning the MP-1, which I heard
him relay to several folks at Dayton, Julian scribbled:
<snip> "It goes against the grain a bit to ignore the SWR altogether,
since when I had the SWR meter inline it often seemed that two bars
could equal 3:1 or more, which I would never normally transmit into.
It certainly makes it a whole lot easier if you just don't worry
about the SWR."


This is the very advice my elmers gave me when I first got on to HF
back in 1983. SWR ain't important; power out is! I had a TS-430S
then, and would tune for peak DC input AMPERAGE! If I remember
correctly, they told me that way, *way* back when they used to put a
neon bulb across the open-wire feedline & tune for maximum
brightness.

Suggest everyone forget the so-called "SWR" meter on the rig & use
the Power Output setting instead. You'll still get the HIGH SWR
warning if warranted (in addition to no power output ;-)

I find that I have extra CW filters for the IC-706 (and maybe other
ICOM's), a 250Hz FL-101 and a 500Hz FL-100. Since I desire a 500 Hz
filter for my new FT-817, I hope I can arrange a swap for one of the
ICOMs.

Anyone here interested?

73, doug

Not sure first message got thru.

Is there any way to open up the FT-817's receive above 154 Mhz? I
want to be able to listen to fire calls in my area.

nope

Thanks

Pres Waterman W2PW
c/o Patchogue Motors, Inc.
Long Island Ford and Kia dealer

GO BILLS!

Thanks, Scott for the report.

Heading out to London in a few weeks so I may pick one
up before then .

Tx

Joe, NE2Z

Two points to add here, hopefully useful to some.

If and when you have high swr, you'll see a series of
bars/lines

If the rig sees _too much_ swr, it will display a warning that says
something like "hi swr" and will cut off tx entirely. Below that, even
though it txs, it will reduce power.

You of course won't see SWR unless you transmit
one of the full signal modes such as FM or CW or AM

Also works with "pkt" which is one step down from LSB, but the One-Touch
Tuner seems a much more convenient idea.

73
John Newell
KB1FPM



























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Flattened the battery with a 12V
camping cooler

Not sure whether this came across clearly in my earlier post, but the thing
that caught me off guard was that the inverter itself, with *no* load
applied, flattened the battery. This one apparently draws enough current in
the on/no load condition to kill a battery. It's a 10-year old model, so
maybe there are better designs. BTW, buying one of the ones that cuts out
at 10.x volts won't, by itself, help, since your battery is dead for all
practical purposes at or near that level (around 10.5v for a 12v nominal
batt).

73
John Newell
KB1FPM

































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This message is intended only for the designated recipient(s). It may
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attorney-client privilege or other confidentiality protections. If you are
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It's also probably time for a new battery. You only get two or three
total discharges on a car battery before it's pretty worthless.

Ed Woodrick

On Wed, 23 May 2001 11:06:37 -0400, John Newell
KB1FPM wrote about RE: [FT817] Maha Charger :

12v-110vAC inverter and run the Maha
from that.

A word of caution...Turns out that the voltage tap in the back of
my wife's Ford

Thanks for the heads up about the inverter.

The 12V outlets in my Yukon XL are always hot. While there is a
feature that turns off the AM/FM radio & interior lights after 20
minutes, the 12V outlets are exempt. Flattened the battery with a 12V
camping cooler and then again over a period of 4 days in which the SUV
was not started. Second time with my TH-D7A & Garmin GPS continually
on. Time for either a dedicated 2d battery or Charge Guard.

73
Tom K4IIJ

Hi Greg,

You might give the FAQ a quick read on this subject. In short, the
charger puts out about 190 mA w/ 13.8 V input and near 0 at 12 V. The
trickle charge is a bit less than half of that needed for a 1600 mAh
battery, but it slows the ullage of the cells. Using the internal
charger requires paying attention to the discharge state of the
batteries. It is wise to allow the batteries to discharge to the poit
where the 817 turns itself off. Then a pair of 8 hour charges is
quite appropriate as explained in the FAQ.

72 de Barry - W4WB

Not sure first message got thru.

Is there any way to open up the FT-817's receive above 154 Mhz? I
want to be able to listen to fire calls in my area.



WA6TWI

I would like to be able to listen to fire dept. calls in my area, but
some freqs they use are above 154 Mhz. Is there a mod to open up the
VHF receive beyond 154?

--- In FT817@y..., sundstrj@g... wrote:

I put my rig in the "SWR Meter" display mode but don't observe any
indications. Would someone please tell me what I am supposed
to be looking for. Thanks, John N8YQD

If and when you have high swr, you'll see a series of
bars/lines...more bars, higher SWR. I am certain it is not calibrated
to SWR value but is a good quality measure.

You of course won't see SWR unless you transmit one of the full
signal modes such as FM or CW or AM. On SSB you'll see the SWR
reading change with modulation (if you use SSB you need some
drive...whistle or say Ola).

I use the display to set up my antenna tuner and my MP-1 antenna
match...as I said it's not qualtified to SWR value exactly, but it is
a good tool

Unless you are using it to feed a balanced antenna. I have a 239 in
my loft, feeding an approx. 16ft square horizontal loop in the middle
of one side. It is not connected to ground at all, and seems to work
fine.

Julian, G4ILO

--- In FT817@y..., "Peter Plewka" <p1611p@g...> wrote:

Hi Dan,

every antenna coupler like the SGC 239 or others need the ground

for proper

function.

73s, Peter

Nothing, if you have a good match. Otherwise you should see some
bars, just like the S-meter, though without the numeric indication.

Julian, G4ILO

Now that's the most useful contribution to this discussion so far.
The maximum noise peak is quite sharp on the higher bands, and one of
the things I had noticed is that maximum noise does not necessarily
equate to lowest SWR. It goes against the grain a bit to ignore the
SWR altogether, since when I had the SWR meter inline it often seemed
that two bars could equal 3:1 or more, which I would never normally
transmit into. It certainly makes it a whole lot easier if you just
don't worry about the SWR.

Julian, G4ILO

Pres, thank you for forwarding the practical advice on tuning the MP-
1. I've also found the discussion thread on the MP-1 and ATX to be
very helpful this past week.

I'm a newly licensed ham with little operating experience and I've
yet to make a contact using either the MP-1 or ATX Walkabout. At the
house I'm using an Alpha Delta DX-EE loaded, multi-band dipole in the
attic with a Z-11 auto tuner and I've had great success at 5 watts on
10 thru 40 meters. Following my lack of success with the MP-1 and
ATX I purchased a half-length G5RV to throw into the trees but I'd
really like to get the vertical whips to work for those nights I'm
stuck in the hotel room. Keep the advice coming and thanks to all
who have shared their experience and wisdom.

Scott/KB1GEI

--- In FT817@y..., "Pres Waterman" <pres@1...> wrote:

----- Original Message -----
From: Chip Margelli
To: Pres Waterman
Sent: Wednesday, May 23, 2001 11:48 AM
Subject: MP-1


Pres, is there any way you could relay this to the 817 board. . .I

still have no access allowing me to reply, and this Julian guy seems
to be in a lot of trouble with the MP-1 (which I find to work quite
well).

<quote>

Julian, the easiest way to tune the MP-1 is to listen for noise.

Make a rough setting, listening for a noise peak, then move your hand
back. Listen again to the noise, then move the sliding section up or
down a turn or two to see if the noise gets louder after you move
your hand back. When you have found the noise peak, send a couple of
dits on CW, and watch the SWR meter. If you have only one or two bars
of SWR showing, that should be plenty close, although I usually am
able to get one or no bars at resonance. No funny counterpoise; just
the set that comes with the MP-1.

I have worked all over Europe, including deep Russia, using the MP-

1 and 2? watts on 15 and 20 meters (ten has been kaput for DX
lately). This from California. The sharpness of the noise peak
indicates a lot of Q, which translates to high efficiency.

72 de Chip, K7JA

<unquote>

If you have Julian's e-mail address, just forwarding to him would

also be OK.

Sorry to bother you. . .sure was amazing the 817s flew out the door

at Dayton.

Dit dit de Chip


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