Multi-DF
'Haunt'
Sunday Aug 20th 2017
Organiser:
Roy G4JAC with 10 Txs
Location:
Bobbits Lane,Ipswich. Pub:
The Beagle, Hadleigh Road, Ipswich.
Following
the successful test of the new electronic Triffids & Dibbers on
Philip's
event, this was a trial of a format designed to gain full benefit from
them.
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A chore at the end of
previous events was collecting the transmitters in, we would all finish
at Tx A, allowing the Organiser to check we finished
by 16:00 and then
be sent to retrieve Txs. After completing an event this extra
walking
was .... 'appreciated by the fitness fanatics'.
With the new
Triffids, that record times, there would be no need for this,
competitors could finish by their Joker and retrieve the Tx and
Triffid. There would be a problem if a Tx was particularly
difficult to
find, making it necessary to use a different format 3x3 +1
instead of
5x2 allowing generous transmission times
for the difficult reds at
the end of the event. The new timings would make the event a
little easier, hence the Organiser's secret weapon, the Ghost! |
A full
explanation of this may be found here
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On my first visit to the site the warden was most helpful pointing out
good locations for the Txs. |
K can
go here.
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| By
Saturday evening all ten Txs were in place set to do test transmissions
at 11:00 am Sunday Morning.
Sunday
morning, all ten were heard at the start, though M was only just
audible.
However, the chain K, L, M would allow those with deaf sets to
get close enough to M to hear it, so one of the spare Txs was not
deployed as a substitute.
See the signal report from
Chris after the results. |
Good to
have 'Suffolk Reds' Keith, Debbie, Vaughn and Chris with
us, are we
ready, ...... steady, .......... di
dah .....!
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Come on
guys this is serious ....
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.....
well not that serious!
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Have we got to cross the stream? Will Philip fall in?
Observing others is a key skill! |
I
suspect Debbie has dibbed! Meanwhile Chris and Keith are sure
it
is the other side of the path and Vaughn is
......contemplating the meaning of life. |
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If you
go down to woods today ....
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Yes!
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A
Sunday afternoon dib, there's nothing quite like it ....
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Results
40, if you are first, 32 second, 26
3rd .... Joker doubled.
Pos |
Competitor |
Hcap |
Joker |
A |
B |
C |
F |
G |
H |
K |
L |
M |
1 |
Total |
Percent |
1 |
Gary P |
146 |
C |
32 |
32 |
80 |
32 |
32 |
32 |
13 |
13 |
23 |
40 |
183 |
100 |
2 |
Chris M |
0 |
* |
15 |
20 |
0 |
15 |
15 |
0 |
80 |
15 |
0 |
0 |
160 |
87 |
3 |
Tim P |
121 |
M |
26 |
26 |
26 |
20 |
20 |
23 |
20 |
32 |
80 |
0 |
152 |
83 |
4 |
Colin M |
58 |
H |
13 |
13 |
23 |
40 |
40 |
80 |
0 |
0 |
0 |
0 |
151 |
82 |
5 |
Vaughn L |
0 |
* |
20 |
23 |
0 |
13 |
0 |
0 |
64 |
20 |
0 |
0 |
140 |
76 |
6 |
Keith G |
0 |
* |
17 |
17 |
0 |
17 |
17 |
0 |
46 |
17 |
0 |
0 |
131 |
71 |
7 |
Philip C |
166 |
B |
40 |
80 |
32 |
26 |
26 |
26 |
15 |
23 |
26 |
0 |
128 |
69 |
8 |
Debbie L |
0 |
* |
23 |
15 |
0 |
11 |
0 |
0 |
52 |
26 |
0 |
0 |
127 |
69 |
9 |
Colin F |
145 |
L |
11 |
11 |
20 |
23 |
23 |
0 |
17 |
80 |
32 |
0 |
72 |
39 |
10 |
Rosie M |
59 |
G |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
-59 |
0 |
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Times - On
your first event you are given a wild Joker and automatic validation at
16:00.
Competitor |
Joker |
A |
B |
C |
F |
G |
H |
K |
L |
M |
1 |
Validation |
Gary P |
C |
13:58:19 |
13:51:40 |
13:48:58 |
14:26:42 |
14:23:39 |
14:18:20 |
14:57:53 |
14:36:55 |
14:49:39 |
15:15:10 |
15:29:08 |
Chris M |
* |
14:39:52 |
14:51:37 |
|
15:23:36 |
15:43:00 |
|
13:55:09 |
14:19:28 |
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|
16:00:00 |
Tim P |
M |
14:09:49 |
14:19:55 |
14:42:18 |
15:07:03 |
15:03:02 |
15:36:45 |
14:01:24 |
13:57:50 |
13:52:19 |
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15:56:09 |
Colin M |
H |
14:42:50 |
14:58:21 |
15:15:55 |
13:59:07 |
14:06:10 |
14:18:07 |
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15:40:16 |
Vaughn L |
* |
14:38:52 |
14:51:09 |
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15:38:47 |
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|
13:55:32 |
14:18:59 |
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16:00:00 |
Keith G |
* |
14:39:38 |
14:52:00 |
|
15:23:25 |
15:42:48 |
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13:56:31 |
14:19:17 |
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16:00:00 |
Philip C |
B |
13:55:43 |
13:41:25 |
14:06:19 |
14:44:00 |
14:54:15 |
15:10:14 |
14:27:51 |
14:18:14 |
14:35:15 |
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15:40:35 |
Debbie L |
* |
14:38:40 |
14:52:36 |
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15:39:05 |
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|
13:56:15 |
14:17:59 |
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16:00:00 |
Colin F |
L |
15:51:58 |
15:31:09 |
15:45:52 |
15:02:30 |
14:55:38 |
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14:27:09 |
13:52:51 |
14:05:45 |
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15:57:13 |
Rosie M |
G |
14:43:03 |
15:48:14 |
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15:10:32 |
14:04:20 |
15:01:27 |
15:34:32 |
-
- - - - |
Times only count for experts when followed by a validating dib at their
Joker. Those in red were not validated.
Rosie becomes the 3rd person (yours truly and
Steve) in the 'negative league' Top Girl!
Interesting sequence L - A - M - K - 1(Ghost) - B ,
obviously wearing her step counting watch. |
Ghost buster Gary - Top man! Unfortunately had
to dash off, hence presentation in the car park. At this stage we
didn't know he had also grabbed the Hero. |
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Rosie
couldn't find her Joker but she is not afraid of ghosts, especially
when bottled.
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So
how did Gary do it?
I
was armed with a fully refurbished set, complete with new head phones
and hoped that my poor form of late would start to change, especially
after a recent DNF on a traditional evening event. I was also feeling
relatively fit and injury free, meaning that I could get back to
running between transmissions.
It was good to see some new competitors - The multi format certainly
deserves to attract more attention. Hopefully the revised format would
mean that they would be successful. It will be interesting to see over
time, how many occasions there will be of DF'ers not being able to
return to their joker and bank their points. There will be no
additional help from other competitors who would have previously
finished early at 'A' and been able to assist others who were running
short on time. One advantage however will be that the time taken to
retrieve all of the equipment will be significantly reduced, with the
'finish at your joker' approach.
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I
was pretty confident at the start that I would be able to dib 10 times
during the afternoon (being the 3 groups plus the final dib at the
joker). This actually turned out to be close to 20 times with my dib
happy behaviour at 'M' due to the position number not flashing
correctly). Note
from Ed. for future reference: If a Triffid battery is low the main red
display shuts down and the white LED only flashes once to save
power - however the single flash means your time has been recorded, no
point in dibbing again. I hadn't
banked on reaching the ghost transmitter - I
thought that this would be too difficult with the transmission length
and time unknown.
My
joker was 'C' (red) and my initial thought
whilst waiting for the first cycle of transmissions was that I might
seek all three red transmitters first, as Roy had indicated that they
would get significantly harder as the event progressed. This would mean
covering a lot more ground than necessary and I quickly decided to
adopt a more traditional approach and attempt to complete each group
before moving on to the next.
I
could hear 'C' from the start
and in fact, all of the other 8, although needed to revert to the new
morse grid, with the introduction of new letters into the sequence. I
therefore ran off towards 'C' which appeared to be in the direction of
Spring Wood, in a similar location to where I hid on a recent
traditional event. Philip also headed in the same direction, although
slightly further North. I did wonder whether there may be a transmitter
hidden on the other side of the road. I wasted time whilst getting
caught underneath the triple power lines
and thought best to move slightly out into the open. 'C' became
significantly stronger and clearly headed very close to where I had on
the recent event. I passed through a gate and spotted the transmitter
relatively easily. The dibbing pot, (are they still called
triffids?) Ed.-Yes
proved
to be more difficult to locate, but spotted it 5 minutes later.
My
approach was to go for 'B' next in the hope that competitors would go
for the easier 'A' first, to leave me with solid points at 'B'. After
hopping across a ditch it wasn't much of a run before I found 'B'
successfully, located next to a path. This banked me 32 points after
gaining 40 at 'C'. (I was surprised how close it was to the path).
A
waist height fence prevented me from running directly towards
'A', and so I had to run along the path in the hope that there would be
a gap or turn in the fence direction.
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After
100 yards, the fence did
turn in a circular direction, however Philip was heading towards me and
I knew that he must have grasped the '40'. He had, but I was still
satisfied to have only dropped 16 points from the first group.
I knew that the secret to this event would be to get to the
second group whilst the majority of the competitors were on their
first. I headed across the railway bridge into the woodland area used
for motor cross events, which Richard S had used for a double event at
the start of the year. My assumption was that the other group (K, L
& M) would be more popular and that the higher value points
would
be more obtainable at (F, G & H).
I could see very little activity and hoped that my previous
assumption was correct. I headed for the harder 'H', which took me
close to the power lines and far away from the main path. The
transmissions were getting shorter and it took me several |
attempts
to
reach 'H', perhaps being over cautious not to over-shoot. Colin was
there, and despite me locating the transmitter first, he spotted the
triffid attached to the tree at ground level. 'G' was luckily still
transmitting and I spotted the aerial within minutes. The triffid
wasn't
too difficult to spot and after banking another 2 x 32 points, I knew
that I was off to a great start. Things got even better, when I managed
to get a quick bearing on the ghost, which pointed back towards the
power line. A very quick dash to 'F' and I managed to gain a third 32
points from the group. Realising that Colin had probably got a complete
set of 40 points, I needed to head off quickly to the final group.
I
very quickly scrapped my idea of going for the ghost before the final
group (K, L & M). This could be too risky, especially with no
previous ghost knowledge. I headed for 'L' first and predictably, I
would be located on the wrong side of the stream. Luckily there was a
bridge nearby and I was able to find the point on the path where my set
had been pointing. There was no likely hiding place on the other side
of the path and I knew that, after finding 'B' so close to the path,
that it could be hidden next to the ivy covered tree, right next to the
stream. It was, however my dibbing hadn't proved as successful with a
small number of points gained. I got caught out on my travels to 'M'. I
carried along the path however realised, as my set turned, that I was
on the wrong side of the stream. It would be a fair distance around,
but found the transmitter after 10 minutes or so, with there being more
cover to search through. After dibbing several times, I headed back
towards the main path in my attempt to find 9 before 3pm.
After
identifying a short clearing within the wood close to the car park, it
didn't take me too long to track down 'K'. Again, not a high points
score here, although I was happy to find 9 around 3pm. There was now
plenty of time to find the ghost and get back to my joker. Luckily,
after taking a bearing on the ghost previously, I knew it would be
close to the power lines, probably not too far away from 'C'. After
downing a bottle of water from under Roy's car, I headed along the
power lines, with the ghost transmitting more often than I was
expecting.
It
took me several transmissions to get anywhere close to 'C'. Again,
getting caught out by the power lines, but also the distance from the
car park. The set kept telling me to go straight on, almost until I
reached the main entrance. The set did however turn at approx. 3.15pm
and pointed directly at a tree standing on it's own. The dibbing
station was also reasonably visible and I was pleasantly surprised to
be the first to find. I was expecting other competitors to have been
tempted by the mystery prize, but it seems that playing it safe was the
order of the day. I headed back to my joker and managed to clock in at
3.30pm. It was then a case of waiting 30 minutes for the event to
finish, before packing up the equipment and heading back to the car
park.
Thanks
to Roy for a great event and for the mystery prize (Ghostship). The
site has again proved ideal for a multi event, with roads, streams,
power lines and a railway line to make things more interesting.
Gary
Very well
done Gary!
Technical stuff
The Ghost's time
hopping kept all but Gary and Rosie 'Scared!
You can see my
programming of the Ghost times here,
they will probably be used for the next event - all may feel free to
memorise them, obviously I have :-)
I am sure we would all like to thank Colin for the original PIC code
and Steve for the PC program that makes such fun possible!
Signal report
I have just
quickly checked my SDR recording of top
band for the afternoon and I was hearing nearly all
of your TX's
apart from M on 1910 kHz.
The 1910 TX's were weaker but that may be my antenna
as I think I tuned it higher in the band . TX strengths were about S7/8
apart
from P and A which
were much stronger at
S9. My home is from 1.7 miles from the DF site. Antenna inverted L at
35 ft, Rx
Perseus SDR.
I
noticed
that an AM net was taking place on 1908 kHz , one of the stations was
G1OZU in
Ashingdon Essex and he was over S9 with me, others in the net were not
detectable.
Chris G3XVL
Chris,
The green, yellow and red Txs have progressively shorter
aerials, 5m, 3m, 2m.
The body of each Tx is just placed on,
or close to, the
ground, no direct earth connection, making setting up much
faster than for Tx P (see below), this causes
variability in effective output - adding to the 'amusement' for
competitors.
Tx P, on at the beginning and end of the event as a 'homing beacon' in
the car
park, was one of the original Txs designed about ten years ago by Paul
Clark G0BTH, same
output
stage (200 mW) into a 4m aerial with
variable inductor aerial tuning, earth connection and
built in SWR meter which explains the S9.
Tx A obviously hit the sweet spot on
ground coupling and M didn't! During testing all
Txs are on 1960 KHz, as soon as
the Organiser establishes that they are all
working, another
'efficient Tx similar to P' is used to swamp the
weaker
signals from the event Txs to prevent competitors taking bearings
before 13:30. This sends out a message,
stating that the frequency will be in use until 16:00.
Four
of
these original Txs are available and can be set to act as
replacements for any of the other Txs should the need arise.
Since I could just
hear M at the start location about 400m away, I didn't bother to
replace it, relying on the stronger signal from K to draw
competitors close enough to pick it up.
As far as I know the first SDR recording of one our events!
Many thanks, Roy
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Hero League
196 HPs and no discard, now that is brave, even for a proven ghost
hunter! |
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Uncle Gary has the Hero for now, but someone else has Grandad building
a DF set for him, the crown fits perfectly! |
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the Multi-Noticeboard
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