Today's Message Index:
----------------------
1. 07:15 AM - Re: Need help with replacement connector pins for KT76A (Charlie England)
2. 01:31 PM - Re: Need help with replacement connector pins for KT76A (Stein Bruch)
3. 02:37 PM - Re: Need help with replacement connector pins for KT76A (Robert L. Nuckolls, III)
4. 02:39 PM - Re: Need help with replacement connector pins for KT76A (Alec Myers)
5. 04:48 PM - Re: what is the truth about gps antennas? (FLYaDIVE)
6. 06:11 PM - Re: what is the truth about gps antennas? (Henador Titzoff)
7. 08:27 PM - Re: what is the truth about gps antennas? (Alec Myers)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Need help with replacement connector pins for KT76A |
Eewww, *those* pins=2E My fix, at least for experimentals, is solder, wire,
and dsub connectors=2E
=81=A3Charlie=8B
On Dec 21, 2018, 11:11
PM, at 11:11 PM, Alec Myers <alec@alecmyers=2Ecom> wrote:
>The pins were di
scontinued by molex about a decade ago, but this guy
>still has stock=2E He
=99s probably the only supplier in the world, now=2E
>
>https://www
=2Emikesarcade=2Ecom/cgi-bin/store=2Epl?sku=CECPIN100
>
>
>On Dec 21, 201
8, at 21:49, jjshultz <jjshultz@cablemo=2Enet> wrote:
>
>--> AeroElectric-L
ist message posted by: "jjshultz"
><jjshultz@cablemo=2Enet>
>
>Can someone
help me find a source for replacement pins for a KT76A
>transponder connect
or=2E I'm not sure of the name of that connector, but
>it is a 24-pin mold
ed plastic unit, with two rows of 12 pins, and the
>pins are not cylindrica
l but flat=2E
>
>If someone has a digikey or mouser part number that would
be fantastic!
>
>Jeff
>
>
>Read this topic online here:
>
>http://forum
s=2Ematronics=2Ecom/viewtopic=2Ephp?p=486480#486480
>
>
>==
=======
>================
==================
>=====
====
>===================
===============
>========
=
>======================
============
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Need help with replacement connector pins for KT76A |
There=99s a reason many those arcade pins are cheap. They are
simply brass plated tin (which is probably fine for some wires, but not
for others). the =9Creal=9D pins are gold flashed
(and silver), and as you noted discontinued long ago. Those of us who
have some left do charge a lot, but that=99s because they just
don=99t exist at the OEM level anymore. Whenever you see a solid
silver or solid gold looking pin, be aware they aren=99t what you
think they are.
Cheers,
Stein
From: owner-aeroelectric-list-server@matronics.com
<owner-aeroelectric-list-server@matronics.com> On Behalf Of Alec Myers
Sent: Friday, December 21, 2018 10:10 PM
Subject: Re: AeroElectric-List: Need help with replacement connector
pins for KT76A
Well, apart from the eBay merchants at $1/pin, that is....
On Dec 21, 2018, at 23:06, Alec Myers <alec@alecmyers.com
<mailto:alec@alecmyers.com> > wrote:
The pins were discontinued by molex about a decade ago, but this guy
still has stock. He=99s probably the only supplier in the world,
now.
https://www.mikesarcade.com/cgi-bin/store.pl?sku=CECPIN100
On Dec 21, 2018, at 21:49, jjshultz <jjshultz@cablemo.net
<mailto:jjshultz@cablemo.net> > wrote:
<jjshultz@cablemo.net <mailto:jjshultz@cablemo.net> >
Can someone help me find a source for replacement pins for a KT76A
transponder connector. I'm not sure of the name of that connector, but
it is a 24-pin molded plastic unit, with two rows of 12 pins, and the
pins are not cylindrical but flat.
If someone has a digikey or mouser part number that would be fantastic!
Jeff
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=486480#486480
< span="">nbsp; (And Get Some AWESOME FREE Gisp; this year's
Terrific Free Incentive Gifts provided
* My Pilot Store
http://www.matronics.==================
=========; <http://www.mypilotstorenbsp;
-Matt%20Dralle,%20List%20Admin.%3c/=============
=========%3c/span%3e%3cbr%3e%3cs> - MATRONICS
WEB FORUM"http://forums.matronics.com">http://forums.matronics.com
<="" spanp; &nnbsp; -->=""
http://w======================
====
<>
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Need help with replacement connector pins for |
KT76A
At 09:14 AM 12/22/2018, you wrote:
>Eewww, *those* pins. My fix, at least for
>experimentals, is solder, wire, and dsub connectors.
>
>Charlie
>On Dec 21, 2018, at 11:11 PM, Alec Myers
><<mailto:alec@alecmyers.com>alec@alecmyers.com> wrote:
>The pins were discontinued by molex about a
>decade ago, but this guy still has stock. He=99s
>probably the only supplier in the world, now.
>
><https://www.mikesarcade.com/cgi-bin/store.pl?sku=CECPIN100>https://www.m
ikesarcade.com/cgi-bin/store.pl?sku=CECPIN100
>
>
>On Dec 21, 2018, at 21:49, jjshultz
><<mailto:jjshultz@cablemo.net>jjshultz@cablemo.net> wrote:
>
>"jjshultz" <<mailto:jjshultz@cablemo.net>jjshultz@cablemo.net>
>
>Can someone help me find a source for
>replacement pins for a KT76A transponder
>connector. I'm not sure of the name of that
>connector, but it is a 24-pin molded plastic
>unit, with two rows of 12 pins, and the pins are not cylindrical but flat.
>
>If someone has a digikey or mouser part number that would be fantastic!
>
>Jeff
Two choices: I may have some original, open-barrel
crimp pins around here if you don't find them
elsewhere. I belive the connector you are wrestling
with is this one
http://aeroelectric.com/Mfgr_Data/Connectors/Molex_Waldom/Avionics_Connector
_Plug_15003.jpg
and these pins
https://tinyurl.com/y7nranof
which are obsolete and rarely stocked.
I do have some of these
Emacs!
Which you can purchase here:
https://tinyurl.com/y98m7ph9
or I can send you one at no charge.
I'll dig around to see if I can find the
Molex KK pins.
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Need help with replacement connector pins for |
KT76A
Molex never made a "brass plated tin connector.
https://www.molex.com/molex/products/datasheet.jsp?part=active/0008050302_CRIMP_TERMINALS.xml
Theyre a brass body, plated nickel for the wire termination, and gold at the mating
surface. I believe molex did make a nickel plate all over version, but the
ones that Mike sells at not those.
I have some from Mike, and theyre definitely gold plated at the mating surface.
On Dec 22, 2018, at 4:30 PM, Stein Bruch <stein@steinair.com> wrote:
Theres a reason many those arcade pins are cheap. They are simply brass plated
tin (which is probably fine for some wires, but not for others). the real pins
are gold flashed (and silver), and as you noted discontinued long ago. Those
of us who have some left do charge a lot, but thats because they just dont exist
at the OEM level anymore. Whenever you see a solid silver or solid gold looking
pin, be aware they arent what you think they are.
Cheers,
Stein
From: owner-aeroelectric-list-server@matronics.com <owner-aeroelectric-list-server@matronics.com>
On Behalf Of Alec Myers
Sent: Friday, December 21, 2018 10:10 PM
Subject: Re: AeroElectric-List: Need help with replacement connector pins for KT76A
Well, apart from the eBay merchants at $1/pin, that is....
On Dec 21, 2018, at 23:06, Alec Myers <alec@alecmyers.com> wrote:
The pins were discontinued by molex about a decade ago, but this guy still has
stock. Hes probably the only supplier in the world, now.
https://www.mikesarcade.com/cgi-bin/store.pl?sku=CECPIN100
On Dec 21, 2018, at 21:49, jjshultz <jjshultz@cablemo.net> wrote:
Can someone help me find a source for replacement pins for a KT76A transponder
connector. I'm not sure of the name of that connector, but it is a 24-pin molded
plastic unit, with two rows of 12 pins, and the pins are not cylindrical but
flat.
If someone has a digikey or mouser part number that would be fantastic!
Jeff
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=486480#486480
< span="">nbsp; (And Get Some AWESOME FREE Gisp; this year's Terrific Free
Incentive Gifts provided
* My Pilot Store http://www.matronics.===========================; - MATRONICS WEB FORUM"http://forums.matronics.com">http://forums.matronics.com
<="" spanp; &nnbsp; -->="" http://w==========================
<>
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: what is the truth about gps antennas? |
Hi Kevin:
You are 300% right to question Old Wive's Tails.
The Paint Story is not without some merit. It stems from the idea of how
the Color was produced. Black and Gray for example could come from a
CARBON. Carbon is conductive, not highly so but conductive. After all
Carbon Resistors are exactly that Carbon and Conductive.
The old Green, Copper and Bronze have Copper and Bronze metals in them.
White paint can have Titanium Dioxide in it and titanium is metal and
slightly conductive.
There are also paints such as primers which have Zinc in them.
Well, you can see the thought process, that conductive paints can cause
some problems.
So, why take the chance... The industry makes a general Old Wive's Tail
statement of Do Not Paint GPS Antennas.
Of course the Pigment of paints have changed over the years, too bad the
Old Wive's Tails have a stronger following than the process of common
sense.
What YOU can do is read the Ingredients List of what makes the paint the
color (Pigment) and see if any of the above items are listed. ALSO, you
can look up the MSDS for the paint.
Next: -
OVER DRIVEN: - We should be so lucky.
YES! There is such a thing. It is also know in Receiver Theory as Front
End Over Load.
Too much signal is received and causes SPLATTER - Too much signal covering
too wide a bandwidth.
The 'Active" GPS Antennas do have amplifiers built into them. They
usually range between 10 to 40 dB Gain.
The rule of dB is every 3 dB doubles your signal. So, YES, in theory if you
have a 40 dB gain antenna you could have 40/3 = 13 times the
un-amplified signal. That could be too much for the receiver to handle.
Of course there is a loss in the coax, loss in each of the connectors and
an additional loss in the 90 Deg connector.
So, if an engineer sits down with the slide-ruler the NUMBERS would say
YES, there is too much signal coming down the RG-400. SO! Why not be
smarter than the Engineer - Save your Money - Buy RG-58/AU and run the
shortest length possible? Buy It - HELL! I have a 150 foot spool! But
NOooooo.... Common Sense is over ruled by Sales Pitch and owners spend
$4.00 per foot for RG-400 and they buy 10 foot when only 3 foot is need for
the run. 10 Foot @ $4 = $40 Vs 3 Foot @ $0.75 = $2.25.
So Kevin, you did VERY - VERY GOOD!
Guess What! I did the EXACT same thing with the Stratus ESG coax situation
as you. I also mounted it on my Glare Shield. But, I have a carper over
the antenna so I did not have to paint the antenna.
Works Great, Works Fine - FM!
Barry
message posted by: "kjlpdx" <kevinlane55@gmail.com>
>
> I'm interested in hearing from an engineer who might know about what
> really goes on with my stratus esg gps antenna. they say to use RG400
> cable, 10' minimum, and never paint the antenna. they also told me the
> strength ratings should run in the 30's. I have 3' of RG400 with a
> mechanical 90=C3=82=C2=B0 elbow, I spray painted the antenna flat black a
nd mounted
> it on the glareshield of my RV. my readings are all in the 40's. they tol
d
> me this shows an overdriven condition.
> so why use low impedance cable then need 10'? my iFly740 and Lowrance 100
0
> gps's have antennas with much smaller cables. the iFly shows WAAS grade
> accuracy, using an antenna 1/4 the size of the stratus RAMI antenna.
> when does being overdriven prove to be a problem? is this a situation
> where I could add more mechanical connectors to increase impedance rather
> than more cable length?
> I get the feeling things get written and then forever repeated, such as
> never paint an antenna, without asking any questions. could I use a
> different antenna than the RAMI brand? should I not worry about any of th
is
> and just go fly?
>
>
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: what is the truth about gps antennas? |
It's an old wive's tale that a 40 dB gain is 40/3 = 13 times power gain o
ver 0 dB.
The decibel is a ratio of two physical properties expressed mathematically
using logarithmic base 10.=C2- When referring to power, below are the cal
culated values using the equation dB = 10xLog10(P/Po):
=C2-=C2-=C2- 0 dB = 1=C2-=C2-=C2- 3 dB = 1.995 = ~2=C2-
=C2-=C2- 6 dB = 3.981 = ~4=C2-=C2-=C2- 9 dB = 7.95=C2-
= ~8=C2- 10 dB = 10.0=C2- 20 dB = 100.0=C2- 30 dB = 1000.0=C2
- 40 dB = 10,000.0
So 40 DB represents a ratio of 10,000, not 13.=C2- If 0 dB = 1 milliWat
t, then 40 dB = 10 Watts.
Everything else you say below is correct except that RF engineers, as well
as LiDAR engineers, refer to too much signal as saturation, not splatter.
=C2- Maybe I'm hanging out with a different bunch of engineers, but we us
e what the literature says.
Henador Titzoff
On Saturday, December 22, 2018, 8:03:24 PM EST, FLYaDIVE <flyadive@gmai
l.com> wrote:
Hi Kevin:
=C2-You are 300% right to question Old Wive's=C2-Tails.The Paint Story
is not without some merit. It stems from the idea of how the Color was prod
uced.=C2- Black and Gray for example could come from a CARBON.=C2- Carb
on is conductive, not highly so but conductive.=C2- After all Carbon Resi
stors are exactly that Carbon and Conductive.The old Green, Copper and Bron
ze have Copper and Bronze metals in them.White paint can have Titanium Diox
ide in it and titanium is metal and slightly conductive.There are also pain
ts such as primers which have Zinc in them.=C2-=C2-Well, you can see th
e thought process, that conductive paints can cause some problems.So, why t
ake the chance...=C2- The industry makes a general Old Wive's Tail statem
ent of Do Not Paint GPS Antennas.Of course the Pigment of paints have chang
ed over the years, too bad the Old Wive's Tails have a stronger following t
han the process of common sense.=C2-What YOU can do is read the Ingredien
ts List of what makes the paint the color (Pigment) and see if any of the a
bove items are listed.=C2- ALSO, you can look up the MSDS for the paint.
Next: -=C2-OVER DRIVEN: - We should be so lucky.YES!=C2- There is such
a thing.=C2- It is also know in Receiver Theory=C2-as Front End Over Lo
ad.Too much signal is received and causes SPLATTER=C2-- Too much signal c
overing too wide a bandwidth.The 'Active" GPS=C2- Antennas do=C2- have
amplifiers=C2-built into them.=C2- They usually range between 10 to 40
dB Gain.The rule of dB is every 3 dB doubles your signal. So, YES, in theor
y=C2-if you have a 40 dB gain antenna you could have 40/3 = 13 times th
e un-amplified=C2-signal.=C2- That could be too much for the receiver t
o handle.Of course there is a loss in the coax, loss in each of the connect
ors and an additional loss in the 90 Deg connector.So, if an engineer sits
down with the slide-ruler=C2-the NUMBERS would say YES, there is too much
signal coming=C2-down the RG-400.=C2- SO!=C2-Why not be smarter than
the Engineer - Save your Money - Buy RG-58/AU and run the shortest length
possible?=C2- Buy It - HELL!=C2- I have a 150 foot spool!=C2- But NOo
oooo....=C2- =C2-Common Sense is over ruled by Sales Pitch and owners s
pend $4.00 per foot for RG-400 and they buy 10 foot when only 3 foot is nee
d for the run.=C2- 10 Foot=C2-@ $4 = $40 Vs 3 Foot=C2-@ $0.75 = $
2.25.=C2-=C2-So Kevin,=C2- you did VERY - VERY GOOD!
Guess What!=C2- I did the EXACT same thing with the Stratus ESG coax situ
ation as you.=C2- I also mounted it on my Glare Shield.=C2- But, I have
a carper over the antenna so I did not have to paint the antenna.
Works Great, Works Fine - FM!
Barry
messageposted by: "kjlpdx" <kevinlane55@gmail.com>
I'm interested in hearing from an engineer who might know about whatreally
goes on with my stratus esg gps antenna. they say to use RG400cable, 10' mi
nimum, and never paint the antenna. they also told me thestrength ratings s
hould run in the 30's. I have 3' of RG400 with amechanical 90=C3=82=C2=B0 e
lbow, I spray painted the antenna flat black and mountedit on the glareshie
ld of my RV. my readings are all in the 40's. theytold me this shows an ove
rdriven condition.
so why use low impedance cable then need 10'? my iFly740 and Lowrance1000 g
ps's have antennas with much smaller cables. the iFly shows WAASgrade accur
acy, using an antenna 1/4 the size of the stratus RAMIantenna.
when does being overdriven prove to be a problem? is this a situationwhere
I could add more mechanical connectors to increase impedance ratherthan mor
e cable length?
I get the feeling things get written and then forever repeated, such asneve
r paint an antenna, without asking any questions. could I use adifferent an
tenna than the RAMI brand? should I not worry about any ofthis and just go
fly?
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: what is the truth about gps antennas? |
40dB is 40/3 = 13.3 doublings, or a ratio of 2^13.3, which is about 10,000
, as you say.
On Dec 22, 2018, at 21:10, Henador Titzoff <henador_titzoff@yahoo.com> wrote
:
It's an old wive's tale that a 40 dB gain is 40/3 = 13 times power gain ov
er 0 dB.
The decibel is a ratio of two physical properties expressed mathematically u
sing logarithmic base 10. When referring to power, below are the calculated
values using the equation dB = 10xLog10(P/Po):
0 dB = 1
3 dB = 1.995 = ~2
6 dB = 3.981 = ~4
9 dB = 7.95 = ~8
10 dB = 10.0
20 dB = 100.0
30 dB = 1000.0
40 dB = 10,000.0
So 40 DB represents a ratio of 10,000, not 13. If 0 dB = 1 milliWatt, the
n 40 dB = 10 Watts.
Everything else you say below is correct except that RF engineers, as well a
s LiDAR engineers, refer to too much signal as saturation, not splatter. Ma
ybe I'm hanging out with a different bunch of engineers, but we use what the
literature says.
Henador Titzoff
On Saturday, December 22, 2018, 8:03:24 PM EST, FLYaDIVE <flyadive@gmail.com
> wrote:
Hi Kevin:
You are 300% right to question Old Wive's Tails.
The Paint Story is not without some merit. It stems from the idea of how the
Color was produced. Black and Gray for example could come from a CARBON. C
arbon is conductive, not highly so but conductive. After all Carbon Resisto
rs are exactly that Carbon and Conductive.
The old Green, Copper and Bronze have Copper and Bronze metals in them.
White paint can have Titanium Dioxide in it and titanium is metal and slight
ly conductive.
There are also paints such as primers which have Zinc in them.
Well, you can see the thought process, that conductive paints can cause some
problems.
So, why take the chance... The industry makes a general Old Wive's Tail sta
tement of Do Not Paint GPS Antennas.
Of course the Pigment of paints have changed over the years, too bad the Old
Wive's Tails have a stronger following than the process of common sense.
What YOU can do is read the Ingredients List of what makes the paint the col
or (Pigment) and see if any of the above items are listed. ALSO, you can lo
ok up the MSDS for the paint.
Next: -
OVER DRIVEN: - We should be so lucky.
YES! There is such a thing. It is also know in Receiver Theory as Front En
d Over Load.
Too much signal is received and causes SPLATTER - Too much signal covering t
oo wide a bandwidth.
The 'Active" GPS Antennas do have amplifiers built into them. They usuall
y range between 10 to 40 dB Gain.
The rule of dB is every 3 dB doubles your signal. So, YES, in theory if you h
ave a 40 dB gain antenna you could have 40/3 = 13 times the un-amplified s
ignal. That could be too much for the receiver to handle.
Of course there is a loss in the coax, loss in each of the connectors and an
additional loss in the 90 Deg connector.
So, if an engineer sits down with the slide-ruler the NUMBERS would say YES,
there is too much signal coming down the RG-400. SO! Why not be smarter th
an the Engineer - Save your Money - Buy RG-58/AU and run the shortest length
possible? Buy It - HELL! I have a 150 foot spool! But NOooooo.... Comm
on Sense is over ruled by Sales Pitch and owners spend $4.00 per foot for RG
-400 and they buy 10 foot when only 3 foot is need for the run. 10 Foot @ $
4 = $40 Vs 3 Foot @ $0.75 = $2.25.
So Kevin, you did VERY - VERY GOOD!
Guess What! I did the EXACT same thing with the Stratus ESG coax situation a
s you. I also mounted it on my Glare Shield. But, I have a carper over the
antenna so I did not have to paint the antenna.
Works Great, Works Fine - FM!
Barry
message posted by: "kjlpdx" <kevinlane55@gmail.com>
>
> I'm interested in hearing from an engineer who might know about what reall
y goes on with my stratus esg gps antenna. they say to use RG400 cable, 10' m
inimum, and never paint the antenna. they also told me the strength ratings s
hould run in the 30's. I have 3' of RG400 with a mechanical 90=C3=82=C2=B0 e
lbow, I spray painted the antenna flat black and mounted it on the glareshie
ld of my RV. my readings are all in the 40's. they told me this shows an ove
rdriven condition.
> so why use low impedance cable then need 10'? my iFly740 and Lowrance 1000
gps's have antennas with much smaller cables. the iFly shows WAAS grade acc
uracy, using an antenna 1/4 the size of the stratus RAMI antenna.
> when does being overdriven prove to be a problem? is this a situation wher
e I could add more mechanical connectors to increase impedance rather than m
ore cable length?
> I get the feeling things get written and then forever repeated, such as ne
ver paint an antenna, without asking any questions. could I use a different a
ntenna than the RAMI brand? should I not worry about any of this and just go
fly?
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|