[19:58:16] ebijack (mi): Please welcome our guest tonight Paul Abke "PMA" he is the
importer for the gtm40t depth/temp sensor unit
[19:58:30] LS(nd): welcome Paul
[19:58:31] PMA: Hello everyone!
[19:58:35] ^2old2^ (mi): Welcome Paul
[19:58:40] Hunter(Pa): Hi Paul
[19:58:46] ebijack (mi): it's an open forum tonight, please let paul answer the questions
and not hammer him, thanks
[19:59:27] LS(nd): Paul, can you expalin a little on how your unit works?
[19:59:30] ebijack (mi): paul , can you give us a run down on what the unit does
[20:00:00] PMA: Yes, the GTM40T+ uses barometric pressure to sense depth.
[20:00:14] PMA: It records water temp every 5 feet as it falls to the bottom.
[20:00:36] PMA: When it rests at any depth for 10 seconds it stops recording.
[20:00:59] Drift'r: Paul , how heavy is the unit?
[20:01:04] PMA: Retrieve the unit to the surface and press the button on the side and
the readings scroll on the digital display.
[20:01:13] PMA: The unit weighs 2oz.
[20:01:14] Skeeter: I would think having the unit attached to the line would affect the
depth reading compared to without what is this factor.
[20:01:49] PMA: Yes, the unit will ad some drag, but any lure will also add drag. I do
not have a factor.
[20:01:57] Hunter(Pa): Is this unit set up on a reel or is it a hand line
[20:02:04] Skeeter: Ok thanks
[20:02:24] PMA: the unit can be attached to your rod and reel, Dipsy or to a
downrigger on a release.
[20:02:33] Skeeter: does it read in 1 foot increments?
[20:02:36] Hunter(Pa): thanx
[20:02:46] ebijack (mi): paul, discribe the actual size
[20:03:00] PMA: The slower you lower it the more accurate the temp readings will be. It
only reads in 5' increments.
[20:03:34] PMA: The unit is about the size of a pager, 3 1/2 x 1 3/4 x ½
[20:04:11] Hunter(Pa): what kind of batteries does it use and how long do they last?
[20:04:26] PMA: The unit uses a lithium battery, it lasts for about 2 years and costs
[20:04:51] PMA: can be purchased at any office supply store
[20:05:08] Hunter(Pa): Ok now for the question on everyones mind. What does this
unit sell for
[20:05:26] PMA: I have extra o-rings. They should be replaced when the battery is
[20:05:33] Skeeter: How does it attach to the line?
[20:05:55] PMA: Walleye Central sells the unit for $79.99. List price is $99.99 and for
the chat tonight, free freight!
[20:06:19] ^2old2^ (mi): does it need calibrating for changes in barometric pressure
[20:06:20] PMA: There is a hold in the upper end of the unit where a snap can be
[20:06:35] PMA: Everytime the unit is turned on, the unit calibrates itself.
[20:06:49] Skeeter: OK like a release from a snapweight?
[20:07:11] PMA: Yes
[20:07:19] Skeeter: OK
[20:07:46] PMA: If you haven't looked yet, Walleye Central tested a unit and has a
nice write up on their site.
[20:07:55] ebijack (mi): paul, do the salmon fisherman use this unit in the great lakes?
[20:08:32] PMA: Yes, the Salmon guys love it. They can find the depth their Dispys
[20:08:53] PMA: And they can use it with a downrigger to check the temp profile of the
[20:09:05] Hunter(Pa): does it have a maximum depth?
[20:09:13] ebijack (mi): how many decimal points is the temp recordings, like for
[20:09:48] PMA: Just attach it to a stacker release and send it down with the rest of
your lines and bright it up after it has rested for 10 seconds. It works to about 100'
[20:10:01] PMA: Depth and temp are in "tenths"
[20:10:41] PMA: I believe the units actually works to about 40 meters, but I say 100
feet to keep it simple
[20:10:58] Hunter(Pa): what is the accuracy of the unit?
[20:11:11] ebijack (mi): a guy could attach this to his line and cast it into a river stream
and find out the bottom hole temp?
[20:11:45] PMA: I have not tested absolute accuracy on the temp, but the depth is
based on barometric pressure and is right on.
[20:12:15] PMA: Yes, in Germany, where it's made, casting is how it was designed to
[20:12:20] ebijack (mi): paul, do you know how the baro changes per depth of water?
[20:13:15] ebijack (mi): so it is german made i take it
[20:13:33] PMA: water pressure is one of those Newton laws that is a standard in the
world. The unit does have different settings for use in saltwater.
[20:14:13] Big Red: What is the warrenty on this unit?
[20:14:34] PMA: The unit has 4 or 5 settings for water density (fresh/salt). Its is
precalibrated for fresh water.
[20:15:11] PMA: The factory has a 6 month warranty. I will guarantee it for a full fishing
season. Never had a dud yet!
[20:15:16] jbeboatman: one atmosphere pressure per 33 feet if i remember rite
[20:15:54] PMA: I knew someone would have the scientific data.....
[20:17:04] PMA: Remember, the unit is designed for 100' of water. Lots of pressure
down there. It's really well made.
[20:17:22] ebijack (mi): paul, have you trolled with the unit yet
[20:17:29] PMA: Yes.
[20:17:50] PMA: It ads a little drag, but there is no way around that.
[20:17:57] Big Red: Did you say what this weighed?
[20:18:07] jbeboatman: pressure thats why we have to fize our fish
[20:18:12] PMA: It weighs 2 oz. It's a compact little unit.
[20:19:49] ebijack (mi): paul, have you used the unit to find the thermoclines
[20:20:00] PMA: I have also talked to someone who used it for ice fishing and found it
works well for that too.
[20:20:41] PMA: Yes, the unit can sense temp in tenths of a degree and you just watch
the display for the temp change.
[20:21:26] PMA: I have a temp chart on my web page.
[20:21:39] ebijack (mi): is that for the unit paul
[20:21:48] PMA: It will give you temps fish are most active at.
[20:22:19] PMA: It covers most all the sport fish around the area and beyond
[20:23:20] PMA: I did not invent the chart, but it has been around and is used by
several companies marketing temp devices for fishing
[20:23:24] ebijack (mi): so you should try to hold it at depths for 5 seconds to get a
[20:23:25] jbeboatman: seen that chart today one of my charter guys has it on his boat
[20:24:07] PMA: No, the temps readings are automatic. The slower you let the unit
down, the mroe time the sensor has to adjust to the different temps.
[20:24:24] Skeeter: one question if it finds the thremocline but only reads in 5 foot
increments and the thermocline is ussally only a 2 to 3 foot swat of water how does it
give you the correct depth?
[20:24:34] ebijack (mi): paul, is there a way to hook it up to a remote readout, so you
could watch it on a downrigger etc
[20:24:50] PMA: Ideally, it falls under its own weight, but it is not necessary to lower it
[20:25:10] PMA: No remote read out available. That's where the $600 Fish Hawk
come in handy.
[20:25:19] Hunter(Pa): does the unit have a memory or does it clear when shut off?
[20:25:33] jbeboatman: some downriggers have temp in the ball
[20:25:58] PMA: The unit stores the data unit you reset it by holding down the button
for 5 seconds
[20:26:14] PMA: Yes, Walker and Riviera make temp downriggers
[20:27:02] PMA: The unit automatically shuts off after 5 minutes to save battery life.
[20:27:13] sirwaltr: Paul, I got here late, so how does the unit give you the correct
depth of a dipsy diver?
[20:28:22] PMA: When you use it behind a Dipsy, remove your lure and send the Dipsy
down with the GTM40T+ and let the Dipsy reach it max depth. Trip the Dipsy and
revies the readings when you get it back to the surface.
[20:28:44] ebijack (mi): speaking of depth, with only 2 oz of weight, you could really
find out how deep your cranks really run?
[20:28:55] sirwaltr: Thanks
[20:29:02] PMA: If you do this with different amounts of line out, you can get a profile of
how deep the Dipsy goes with different amounts of line out.
[20:29:56] PMA: Yes, I imagine if you attach it to the back of a Jensen Deep Diving
lure, you could get a round-about depth reading.
[20:30:08] sirwaltr: Sounds like you are taking the guessing out of play
[20:30:23] ^2old2^ (mi): would it be better to connect it above or below a dipsy diver
[20:30:35] ebijack (mi): heck, it sounds like a easy way to find out how deep your
cranks really run
[20:30:47] PMA: Between the Crank Baits In-Depth book and the GTM40T+, fish don't
have a chance.
[20:31:20] PMA: I would run it in back of the Dipsy on a snubber, just in place of the
[20:31:42] PMA: Just let it out a little slower than usual
[20:32:05] Skeeter: say a crank runs 17 feet would it tell you its at 20 feet or 15 feet
does it go to the nearset up or down?
[20:32:12] sirwaltr: How accurate are the readings
[20:32:18] ebijack (mi): paul, will it get hurt by hitting a few rocks? when trolling
[20:32:43] PMA: When it takes the final reading, the number is the acutal number in
tenths. The last reading is not in a 5
[20:32:47] PMA: foot increment
[20:32:58] ^2old2^ (mi): does it read in both feet and meters
[20:33:13] PMA: I think rocks are bad no matter what they hit.
[20:33:42] PMA: It can read in meters, but must be set that way everytime you want
[20:34:04] PMA: It comes on in feet
[20:34:05] ebijack (mi): i was refering to finding a rock hump etc by accident
[20:34:38] Big Red: I think it would be difficult to get a good reading on cranks with
two onces of extra weight!
[20:34:54] PMA: Yes, accidents happen and I have not tested it on the rocks.
[20:35:03] ebijack (mi): :)
[20:35:24] Skeeter: Paul give me an example of what it would say if its reading 17 feet
[20:35:29] PMA: Yes, adding it to a crankbait would just be for comparison purposes.
Because if you add it to you baits, it will effect them all the same.
[20:36:28] PMA: If you let it down to 23 feet of water and it rests on the bottom, the
display would read:
[20:37:16] PMA: 5' 65.3 deg, 10' 63.1 deg,. . . . . 23.5' 62.2 deg.
[20:38:00] PMA: Again, the final reading is always absolute, whatever the actual temp
and depth is.
[20:38:33] Skeeter: ohh ok I understand now it reads in 5 foot increments until it
reaches its max depth right
[20:38:53] PMA: If you let it down 100' you would get 20 data points to check.
[20:39:05] Skeeter: Ok thats cool
[20:39:05] ebijack (mi): so if your electronics show a thermocline at 29ft you could
drop it to approx.27ft and 30 ft to see the difference in temp
[20:39:49] PMA: Well, it would read temps at 25' and 30'. Hopefully it will catch the
[20:40:05] PMA: It's not perfect, but at $79.99 is does a great job compared to lowering
a thermometer down.
[20:40:55] ebijack (mi): paul, how much affect does it have on sideplaner boards
[20:41:03] PMA: I used it a marina and was suprised to see the temp change in only 12
feet of water.
[20:41:24] Skeeter: Actually depth is the more important factor at least as far as
walleyes are concerned
[20:42:04] PMA: I have not tried it on planer boards, but I suppose if you attached it to
a diving lure and sent it out to the side it would work fine. I would remove the hooks to
[20:42:40] Skeeter: it wouldnt be any different than having a 2 once snapweight on
[20:42:55] PMA: You will be very impressed with the depth readings. When I compared
the depth to the LMS-350, it was right on,
[20:43:22] PMA: Never though of using it as a snap weight. Kind of an expensive
[20:43:37] PMA: it does not float....
[20:43:39] Big Red: Gotta go, thanks for the info. Neat unit
[20:44:20] PMA: great questions, fishermen keep coming up with new ways to use the
[20:45:08] Skeeter: I not saying use it as a snapweight but it doesnt weigh anymore
that was my point
[20:45:11] PMA: I have never returned a unit yet, but it the unit is new and the box is
perfect, I will accept returns. But the unit must be as new.
[20:45:38] PMA: I got your idea about the snap weight, it was a good point.
[20:46:44] ebijack (mi): what's the max temp it reads paul
[20:46:59] Skeeter: OK paul you convinced me to give this unit a test
[20:47:46] PMA: 32 to 86 degrees
20:47:55] ebijack (mi): so you don't reccomend that the wife uses it for her bath temp
[20:48:26] ebijack (mi): paul, can you tell us how to get tonights special deal
[20:48:33] PMA: Must be in 5 feet of water to take the first reading. Works only for
deep cold tubs.
[20:48:41] ebijack (mi): :)
[20:49:07] ^2old2^ (mi): if a person was to take it ice fishing would it perform after being
exposed to sub freezing temps
[20:49:20] PMA: I believe you just get to the Walleye Central site and they have
sercure online ordering. The is a 24 hour grace period on the free freight.
[20:50:37] jbeboatman: thanks for the info sounds cool gotta go
[20:50:42] PMA: The unit reads to 32 degrees. But like and peice of electronic
equipment, I would keep the unit in a pocket until you use it and then lower it into the
water when needed. Water will not be too cold.
[20:51:01] PMA: "any piece"
[20:51:01] Skeeter: cool paul thanks for the info tonight where do you use your unit?
[20:51:41] PMA: I'm on Lake St. Clair in Michigan and Lake Huron. Lots of guys on
Lake Erie use them.
[20:51:48] ^2old2^ (mi): about what is the physical size of the unit
[20:51:59] PMA: Charter guys like the Dipsy idea
[20:52:28] PMA: 3 1/2" x 1 3/4 " x 1/2"
[20:53:17] ebijack (mi): is there anything that you can tell us that we didn't ask yet paul
[20:54:35] PMA: When I used it, I was checking for bottom depth and have never tried
to check a thermocline depth. Good idea though.
[20:55:19] ebijack (mi): is ther any other questions out there for paul
[20:55:20] ^2old2^ (mi): it's sort of cone shaped then?
[20:55:41] PMA: For best reading, especially when it's warm outside, dunk the unit in
the water for a few seconds to cool the unit done. That way it won't have to drop so
much in temp to take the first reading.
[20:56:11] PMA: The unit looks like a pager with both ends rounded. It
[20:56:26] PMA: It;s flat on front and back and round on top and bottom.
[20:56:45] PMA: about 1/2 inch thick.
[20:56:57] PMA: Like a oval race track.
[20:57:09] ^2old2^ (mi): ok :-) sorry i've never seen one
[20:57:10] R Hill(mi): How much does it weigh Paul
[20:57:25] PMA: it weighs 2 oz.
[20:57:50] Eagle1 (mn): Forgive my tardiness but what is it we are discussing?
[20:58:13] PMA: The GTM40T+ depth and temp recorder
[20:58:58] R Hill(mi): Paul was this unit in In-fisherman
[20:59:06] Jester: they just had a blurb in walleye insider eh?
[20:59:31] Duffy: What kind of a unit is the GTM40T?
[20:59:53] Jester: interesting unit....
[21:00:16] PMA: It reads water temp and depth every 5 feet as you lower it into the
water. Its is used to find depths of Dipsys, Downrigger balls. or thermoclines.
[21:00:28] ^2old2^ (mi): what would you use to attach it if you wanted to hook it
directly to your line
[21:01:10] PMA: swivel
[21:01:22] Jester: can you run the unit on in-lines?
[21:01:46] ebijack (mi): any quick last questions for paul,
[21:02:11] PMA: Yes, just attach it to a diving lure to get it down. It weighs 2 oz, but
when trolling, I think you'll need something to pull it down
[21:02:49] PMA: Thanks for all your great questions. Check out the Walleye Central
[21:02:57] ^2old2^ (mi): where are you located at
[21:03:05] ebijack (mi): thanks for your time paul!!!!!!!!!!!!!
[21:03:18] Skeeter: Thanks alot paul very informitive!!!
[21:03:20] ^2old2^ (mi): yes thank you Paul
[21:03:31] PMA: I'm in Grosse Pointe Woods. I have a day job at Lakeside Fishing
Shop in St. Clair Shores
[21:03:36] null: thanx paul
[21:03:37] R Hill(mi): Thanks Paul it looks and sounds like a neet unit
[21:03:38] lars: thanks PMA
[21:04:03] PMA: Time flys, just like fishing.
[21:04:37] PMA: you can email me questions at : firstname.lastname@example.org
[21:05:19] ^2old2^ (mi): insert applause! here :-)
[21:05:24] ebijack (mi): :)
[21:05:29] Skeeter: !
[21:05:31] PMA: Anyone used any of the new video fishing cameras?