Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
In alt.home.repair, on Sat, 24 Jul 2021 10:26:38 -0400, Ralph Mowery
rmowery42@charter.net> wrote:
In article<q76ofg9e48u9nb1k4kpouknn7vdpr704ba@4ax.com>, NONONOmisc07
@fmguy.com says...
The urls people have posted here (before electronics.repair was added)
make clear that the ground plane in the car makes a difference, and that
cars without one need a special antenna cable, but a) they\'re mostly
pushed for CB radios, b) it\'s not at all clear that the special antenna
is as good c) when shopping for an antenna, any with ground plane
provision probably make note of it, but those without do not, afaik,
warn people what is missing.
For AM radios in cars, the ground plane effect is almost nill. There is
some capacitance coupling from the frame to the gound, but that plays
very little in the AM band. The FM antennas are often built in the
windshelds and the metal of the car does not com into play there either
to ammount to anything.
Only one car had the antenna in the windshield. A long time ago, I
can\'t remember which.
To be much of a ground plane at the AM band you would need a plate of
around 100 feet, 200 feet would be better. Just look at how tall the AM
transmitter antennas are. Those antennas have about 120 wires as long
as the antenna is tall burried in the ground.
So what can I do to get reception inside as good as what I get in the
car? Especially FM. In the past year, reception for WAMU, 88.5 and
C-Span, 90.1, seems to have gone downhill.
I\'m currently working on a Panasonic NN-C994S Convection Oven, and the converter has a blown mosfet # 1M30D-060. The inverter model is A606Y4T00AP.
Will any 1M30D-060 do the job?
Regards
On Sat, 24 Jul 2021 11:09:02 -0600, lowbrowwoman, the endlessly driveling,
troll-feeding, senile idiot, blabbered again:
I built a variation of this theme.
\"A variation of this theme\", eh, you ridiculous verbose bigmouth? LMAO
On Sat, 24 Jul 2021 11:09:02 -0600, lowbrowwoman, the endlessly driveling,
troll-feeding, senile idiot, blabbered again:
I built a variation of this theme.
\"A variation of this theme\", eh, you ridiculous verbose bigmouth? LMAO
On Friday, April 16, 2021 at 3:45:14 PM UTC-4, Max D. wrote:
I\'m currently working on a Panasonic NN-C994S Convection Oven, and the converter has a blown mosfet # 1M30D-060. The inverter model is A606Y4T00AP..
Will any 1M30D-060 do the job?
Regards
One that isn\'t shorted... I don\'t know if these are counterfeited but if you have a known good supplier where you are, pay a little more and get it from a reliable source - perhaps Panasonic directly if they still provide discrete components for consumer items. You may need a Panasonic part number, not the generic number. Start with acquiring a service manual and go from there. The manual will be helpful if the mosfet took out the gate components.
On 07/23/2021 10:13 PM, Michael Trew wrote:
On 7/23/2021 8:47 PM, micky wrote:
Actually, it\'s that car radios have always given me better reception
than house radios have. Is it the antenna, the ground plane? What?
Typically better reception in the car, yes, but that all depends on the
antenna set up. You can have a very good antenna at home, but one with
a fault in a car. I\'ve owned both. I\'d like to build an AM loop in my
attic to get better AM reception at some point.
I am very into AM radio, especially long-distance AM stations at night.
I\'ve owned cars where they seem to put no thought into the AM radio
band, and it shows (sounds). Dad had a Chevy Trailblazer (2006?) where
you could always hear the transmission or something interfering with the
AM reception.
http://socalradiowaves.com/columns/am_antenna.html
I built a variation of this theme and it worked well. At the time I was
living about 20 miles from the Mexican border and the highly directional
nature of loop antennas let me null out the Mexican power houses.
This is a simpler version that doesn\'t require building a frame:
https://ccrane.com/How-To-Make-a-Simple-Powerful-AM-Loop-Antenna-For-Free/
http://earmark.net/gesr/loop/
That one is more technical. I didn\'t look through all the links but onr
method was to use ribbon cable. When you solder the ends you offset the
conductors and solder them to the one next to it so you\'re forming one
long conductor.
On Friday, April 16, 2021 at 3:45:14 PM UTC-4, Max D. wrote:
I\'m currently working on a Panasonic NN-C994S Convection Oven, and the converter has a blown mosfet # 1M30D-060. The inverter model is A606Y4T00AP..
Will any 1M30D-060 do the job?
Regards
One that isn\'t shorted... I don\'t know if these are counterfeited but if you have a known good supplier where you are, pay a little more and get it from a reliable source - perhaps Panasonic directly if they still provide discrete components for consumer items. You may need a Panasonic part number, not the generic number. Start with acquiring a service manual and go from there. The manual will be helpful if the mosfet took out the gate components.
There are seller on ebay selling these mosfets as \"pulls\", which to
be honest I\'d rather use than a new one of dubious provenance.
There are seller on ebay selling these mosfets as \"pulls\", which to
be honest I\'d rather use than a new one of dubious provenance.
In alt.home.repair, on Sat, 24 Jul 2021 00:13:18 -0400, Michael Trew
mt999999@ymail.com> wrote:
On 7/23/2021 8:47 PM, micky wrote:
Actually, it\'s that car radios have always given me better reception
than house radios have. Is it the antenna, the ground plane? What?
Typically better reception in the car, yes, but that all depends on the
antenna set up. You can have a very good antenna at home, but one with
a fault in a car. I\'ve owned both. I\'d like to build an AM loop in my
attic to get better AM reception at some point.
I am very into AM radio, especially long-distance AM stations at night.
I\'ve owned cars where they seem to put no thought into the AM radio
band, and it shows (sounds). Dad had a Chevy Trailblazer (2006?) where
you could always hear the transmission or something interfering with the
AM reception.
Wow.
The \'72 Buick and then the \'84 Chrysler and 88 Chrysler would get
perfectly here in Baltimore WRC, 980AM, in Washington, DC, a station no
indoor radio, even the fancy receiver, would get at all. (I\'ve only
lost interest in that station because it changed format.)
And for decades, one car radio after another, (maybe the Buick,) Chryler
and Toyota, would get WAMU, 88.5FM, (American University in DC),
perfectly, when only one inside radio would get it. Even now a much
different Toyota radio gets WAMU usually perfectly, when the one inside
radio no longer does as well. (For a while I was reporting to the WAMU
engineer when reception was good or bad, and he got it good, but months
later, it got weak again sometimes. (And like I say, that\'s the one
radio that gets it at all.)
At one point a friend gave me a nice wood \"box\" designed to hold a car
radio, an antenna, and a DC adapter, just for the sake of using a car
radio indoors, but at the same time he told me that it didnt\' work for
him (which is why he was giving it to me). So it seems like the
difference is the metal body on cars, all but a few cars.
The urls people have posted here (before electronics.repair was added)
make clear that the ground plane in the car makes a difference, and that
cars without one need a special antenna cable, but a) they\'re mostly
pushed for CB radios, b) it\'s not at all clear that the special antenna
is as good c) when shopping for an antenna, any with ground plane
provision probably make note of it, but those without do not, afaik,
warn people what is missing.
ohg...@gmail.com <ohg...@gmail.com> wrote:
There are seller on ebay selling these mosfets as \"pulls\", which to
be honest I\'d rather use than a new one of dubious provenance.
Keep in mind you have no way to know an \"ebay pull\" is really a \"pull\"
from another unit vs. someone simply offering the same \"dubious
provenance\" part while stating it was a \"pull\".
I.e., the ebay seller could simply be offering the same dubious part,
with the \"value added service\" of applying a small bit of solder to the
pins to make it look \"used\" before shipping it to you.
ohg...@gmail.com <ohg...@gmail.com> wrote:
There are seller on ebay selling these mosfets as \"pulls\", which to
be honest I\'d rather use than a new one of dubious provenance.
Keep in mind you have no way to know an \"ebay pull\" is really a \"pull\"
from another unit vs. someone simply offering the same \"dubious
provenance\" part while stating it was a \"pull\".
I.e., the ebay seller could simply be offering the same dubious part,
with the \"value added service\" of applying a small bit of solder to the
pins to make it look \"used\" before shipping it to you.
rbowman wrote:
==============
http://socalradiowaves.com/columns/am_antenna.html
I built a variation of this theme and it worked well.
--------------------------------------------------------------
** LOL
I have been using a 5 turn frame antenna *just* like that since the late 70s !!
My * tube AM tuner* has a transformer balanced input for use with a loop.
Like the Carver TX-11b, it also has 15kHz audio bandwidth and low THD at 95% mod plus a switchable, sharp notch at 9kHz.
But the maker ( here in Sydney) did not suggest using a frame antenna in the handbook, nor had one been tried when I asked.
His method was to run a fixed, single turn loop around a window.
The frame is better as you can orient it to maximise the signal or null an unwanted one.
... Phil
rbowman wrote:
==============
http://socalradiowaves.com/columns/am_antenna.html
I built a variation of this theme and it worked well.
--------------------------------------------------------------
** LOL
I have been using a 5 turn frame antenna *just* like that since the late 70s !!
My * tube AM tuner* has a transformer balanced input for use with a loop.
Like the Carver TX-11b, it also has 15kHz audio bandwidth and low THD at 95% mod plus a switchable, sharp notch at 9kHz.
But the maker ( here in Sydney) did not suggest using a frame antenna in the handbook, nor had one been tried when I asked.
His method was to run a fixed, single turn loop around a window.
The frame is better as you can orient it to maximise the signal or null an unwanted one.
... Phil
rbowman wrote:
==============
http://socalradiowaves.com/columns/am_antenna.html
I built a variation of this theme and it worked well.
--------------------------------------------------------------
** LOL
I have been using a 5 turn frame antenna *just* like that since the late 70s !!
My * tube AM tuner* has a transformer balanced input for use with a loop.
Like the Carver TX-11b, it also has 15kHz audio bandwidth and low THD at 95% mod plus a switchable, sharp notch at 9kHz.
But the maker ( here in Sydney) did not suggest using a frame antenna in the handbook, nor had one been tried when I asked.
His method was to run a fixed, single turn loop around a window.
The frame is better as you can orient it to maximise the signal or null an unwanted one.
**Audiosound?
rbowman wrote:
==============
http://socalradiowaves.com/columns/am_antenna.html
I built a variation of this theme and it worked well.
--------------------------------------------------------------
** LOL
I have been using a 5 turn frame antenna *just* like that since the late 70s !!
My * tube AM tuner* has a transformer balanced input for use with a loop.
Like the Carver TX-11b, it also has 15kHz audio bandwidth and low THD at 95% mod plus a switchable, sharp notch at 9kHz.
But the maker ( here in Sydney) did not suggest using a frame antenna in the handbook, nor had one been tried when I asked.
His method was to run a fixed, single turn loop around a window.
The frame is better as you can orient it to maximise the signal or null an unwanted one.
**Audiosound?
On 7/24/2021 1:09 PM, rbowman wrote:
On 07/23/2021 10:13 PM, Michael Trew wrote:
On 7/23/2021 8:47 PM, micky wrote:
Actually, it\'s that car radios have always given me better reception
than house radios have. Is it the antenna, the ground plane? What?
Typically better reception in the car, yes, but that all depends on the
antenna set up. You can have a very good antenna at home, but one with
a fault in a car. I\'ve owned both. I\'d like to build an AM loop in my
attic to get better AM reception at some point.
I am very into AM radio, especially long-distance AM stations at night.
I\'ve owned cars where they seem to put no thought into the AM radio
band, and it shows (sounds). Dad had a Chevy Trailblazer (2006?) where
you could always hear the transmission or something interfering with the
AM reception.
http://socalradiowaves.com/columns/am_antenna.html
I built a variation of this theme and it worked well. At the time I was
living about 20 miles from the Mexican border and the highly directional
nature of loop antennas let me null out the Mexican power houses.
This is a simpler version that doesn\'t require building a frame:
https://ccrane.com/How-To-Make-a-Simple-Powerful-AM-Loop-Antenna-For-Free/
http://earmark.net/gesr/loop/
That one is more technical. I didn\'t look through all the links but onr
method was to use ribbon cable. When you solder the ends you offset the
conductors and solder them to the one next to it so you\'re forming one
long conductor.
Thank you!! I think I\'ll try that first antenna with the frame. I can
put it out of place in my attic, if I can make a run downstairs easily
enough.
If I were to make the other antenna, do you think I could use my home\'s
breaker box grounding rod for the antenna, or might there be electrical
interference from the circuits and appliances in my home?
On 07/24/2021 07:33 PM, Michael Trew wrote:
On 7/24/2021 1:09 PM, rbowman wrote:
On 07/23/2021 10:13 PM, Michael Trew wrote:
On 7/23/2021 8:47 PM, micky wrote:
Actually, it\'s that car radios have always given me better reception
than house radios have. Is it the antenna, the ground plane? What?
Typically better reception in the car, yes, but that all depends on the
antenna set up. You can have a very good antenna at home, but one with
a fault in a car. I\'ve owned both. I\'d like to build an AM loop in my
attic to get better AM reception at some point.
I am very into AM radio, especially long-distance AM stations at night.
I\'ve owned cars where they seem to put no thought into the AM radio
band, and it shows (sounds). Dad had a Chevy Trailblazer (2006?) where
you could always hear the transmission or something interfering with
the
AM reception.
http://socalradiowaves.com/columns/am_antenna.html
I built a variation of this theme and it worked well. At the time I was
living about 20 miles from the Mexican border and the highly directional
nature of loop antennas let me null out the Mexican power houses.
This is a simpler version that doesn\'t require building a frame:
https://ccrane.com/How-To-Make-a-Simple-Powerful-AM-Loop-Antenna-For-Free/
http://earmark.net/gesr/loop/
That one is more technical. I didn\'t look through all the links but onr
method was to use ribbon cable. When you solder the ends you offset the
conductors and solder them to the one next to it so you\'re forming one
long conductor.
Thank you!! I think I\'ll try that first antenna with the frame. I can
put it out of place in my attic, if I can make a run downstairs easily
enough.
If I were to make the other antenna, do you think I could use my home\'s
breaker box grounding rod for the antenna, or might there be electrical
interference from the circuits and appliances in my home?
It should work. There are several DX sites but I don\'t know how useful
they are. DX Magazine was good but it was produced by one man who died
in 2017. Arnie Coro had a \'DXers Unlimited\' show on Radio Habana but I
think that\'s been off the air for several years too.
The sad truth is many of the knowledgeable radio people are aging out.
Even the international broadcasters that kept the airwaves interesting
30 years ago have went to the internet. At its peak Deutsche Welle had
15 500 KW transmitters. I don\'t think any are active now.
I\'ve spent some time in Arizona south of Gila Bend. In the evenings I
enjoyed the AM oldies station in Oklahoma City. Mornings I could get
news and music from California. Curiosity about the whys and wherefores
got me into ham radio.
On 7/24/2021 1:09 PM, rbowman wrote:
On 07/23/2021 10:13 PM, Michael Trew wrote:
On 7/23/2021 8:47 PM, micky wrote:
Actually, it\'s that car radios have always given me better reception
than house radios have. Is it the antenna, the ground plane? What?
Typically better reception in the car, yes, but that all depends on the
antenna set up. You can have a very good antenna at home, but one with
a fault in a car. I\'ve owned both. I\'d like to build an AM loop in my
attic to get better AM reception at some point.
I am very into AM radio, especially long-distance AM stations at night.
I\'ve owned cars where they seem to put no thought into the AM radio
band, and it shows (sounds). Dad had a Chevy Trailblazer (2006?) where
you could always hear the transmission or something interfering with the
AM reception.
http://socalradiowaves.com/columns/am_antenna.html
I built a variation of this theme and it worked well. At the time I was
living about 20 miles from the Mexican border and the highly directional
nature of loop antennas let me null out the Mexican power houses.
This is a simpler version that doesn\'t require building a frame:
https://ccrane.com/How-To-Make-a-Simple-Powerful-AM-Loop-Antenna-For-Free/
http://earmark.net/gesr/loop/
That one is more technical. I didn\'t look through all the links but onr
method was to use ribbon cable. When you solder the ends you offset the
conductors and solder them to the one next to it so you\'re forming one
long conductor.
Thank you!! I think I\'ll try that first antenna with the frame. I can
put it out of place in my attic, if I can make a run downstairs easily
enough.
If I were to make the other antenna, do you think I could use my home\'s
breaker box grounding rod for the antenna, or might there be electrical
interference from the circuits and appliances in my home?
That\'s odd. If you go to the NASA space museums, you see that the early 1970\'s satellites have all of this gold and copper looking foil around the satellite\'s lower regions. I thought that helped with transceiver communications.
Heat.
Peter Wieck
Melrose Park, PA