Digest for sci.electronics.repair@googlegroups.com - 25 updates in 6 topics

"Dave M" <dgminala@mediacombb.net>: Sep 25 03:35PM -0500

T i m wrote:
 
> I can't help feeling I've missed something with that solution though,
> like the linearity ... ? ;-(
 
> Cheers, T i m
 
I gave the wrong zener current for the 1N4104 . I just looked at Mouser's
basic info for the diode, but neglected to follow up and look at the actual
datasheet. According to the datasheet, the zener test current is actually
250uA, whereas Mouser states it as 1uA. Quite a difference, but after
looking at the datasheets for some other 10V/200mW zeners, (datasheets that
had actual graphs for Iz vs. Vz) I see that they actually start conducting
well below 1uA, so I feel confident that the 1N4104 will do the job for you.
All the other zeners that I found are SMD devices, so I doubt that you'll be
interested in any of those.
With that Zener in the circuit, I doubt that you'll have any noticible
nonlinearity; certainly not with the meter scale only having a 1-volt
resolution. Forget about the accuracy on the low end as well (except at the
volt marks), because you can't resolve to a basic meter accuracy
specification of +-3% of FSD.
Dave M
T i m <news@spaced.me.uk>: Sep 25 09:45PM +0100

On Mon, 25 Sep 2017 07:53:49 -0700 (PDT), "pfjw@aol.com"
 
>On Monday, September 25, 2017 at 10:13:48 AM UTC-4, tabb...@gmail.com wrote:
 
>> If it's only marked in whole volts, reading it with accuracy won't happen, so it won't be especially accurate.
 
>How so? I suggest that you are mistaking "accuracy" for "precision". They are not even a little bit the same thing nor follow necessarily one from another.
 
+1
 
>A gauge or meter that reads (is marked) in whole numbers but is dead-on is far more accurate than a gauge or meter marked in thousandths, but is always two units off.
 
Yup, that's the thing ... and why many battery meters are calibrated
with red, amber and green sections. Now whilst that would work for me
re charge (voltage) and loosely therefore charge status, it wouldn't
be useful to pin down the discharge / charge status (unlike say a CCA
tester) as the terminal volts are a function of load.
 
> Although the latter meter is extremely precise.
 
Yup and I have some of those. Highly repeatable but always 'out' by
some amount. ;-(
 
>I have a metered Iso-Variac that reads in volts measured in tens, and amps measured in tenths on a 0 -1 or 0 - 4 scale. But they are 4" meters so that even very slight needle movements are visible. The human brain is pretty good at interpolation.
 
And it was the latter thought that I was using when it came to this
meter. ;-)
 
Take something that offers a very 'human' way of displaying something
(like an analogue car fuel or specifically, temperature gauge that
starts at say 60 DegC) and retain the merits but improve the general
meaning / readability.
 
Mileage / trip counters are more suited to being 'digital' etc. ;-)
 
Cheers, T i m
tabbypurr@gmail.com: Sep 25 03:37PM -0700


> I have a metered Iso-Variac that reads in volts measured in tens, and amps measured in tenths on a 0 -1 or 0 - 4 scale. But they are 4" meters so that even very slight needle movements are visible. The human brain is pretty good at interpolation.
 
> Peter Wieck
> Melrose Park, PA
 
With very coarse markings you won't get accurate readings. End of relevant material. I have no motivation to argue over the simple and immaterial.
 
 
NT
Foxs Mercantile <jdangus@att.net>: Sep 25 08:08PM -0500

On 9/25/2017 3:35 PM, Dave M wrote:
> confident that the 1N4104 will do the job for you.
> All the other zeners that I found are SMD devices, so I doubt that
> you'll be interested in any of those.
 
Previously I wrote:
 
The simplest is a 20K resistor in series with a 10v zener diode.
Use a low current Zener so the knee works right at low values.
Something like this:
<http://www.mouser.com/ds/2/395/BZX55C2V0%20SERIES_D1610-1099630.pdf>
Note, this is a DO-35 package.
 
 
--
Jeff-1.0
wa6fwi
http://www.foxsmercantile.com
whit3rd <whit3rd@gmail.com>: Sep 25 07:21PM -0700

On Sunday, September 24, 2017 at 8:43:06 PM UTC-7, T i m wrote:
 
> >I'm far too lazy to do the math on how nonlinear it will be.
 
> I do like the idea of printing my own scale and if this basic one
> works, I might go for a bigger / better meter that I can open etc.
 
Yep, that's a good idea.
 
And, there's NO NONLINEARITY unless you apply bias less than the zener
voltage breakdown, because of Norton's theorem: any bunch of
resistors and voltage sources (the zener is a voltage source) is
identically a current source with a shunt resistance. Offset by
a constant, you can get; nonlinearity, you can't. The meter magnetic field
is the only source of nonlinearity (and meter manufacturers do pretty well
on keeping that uniform).
tabbypurr@gmail.com: Sep 25 07:46PM -0700

On Tuesday, 26 September 2017 03:21:57 UTC+1, whit3rd wrote:
> a constant, you can get; nonlinearity, you can't. The meter magnetic field
> is the only source of nonlinearity (and meter manufacturers do pretty well
> on keeping that uniform).
 
zener v/i curves vary, some are terrible near zero i, some straighter.
 
 
NT
T i m <news@spaced.me.uk>: Sep 26 09:47AM +0100

On Mon, 25 Sep 2017 20:08:01 -0500, Foxs Mercantile <jdangus@att.net>
wrote:
 
>Something like this:
><http://www.mouser.com/ds/2/395/BZX55C2V0%20SERIES_D1610-1099630.pdf>
>Note, this is a DO-35 package.
 
 
So, if the / any issue to the zener solution is the closeness of any
knee to the bottom end of the required voltage range, would the using
the / a lower reference and a potential devider to set the fsd on 15
volts be a better idea still (or have I missed something again)? ;-(
 
Cheers, T i m
T i m <news@spaced.me.uk>: Sep 26 10:07AM +0100

On Mon, 25 Sep 2017 15:35:28 -0500, "Dave M" <dgminala@mediacombb.net>
wrote:
 
>looking at the datasheets for some other 10V/200mW zeners, (datasheets that
>had actual graphs for Iz vs. Vz) I see that they actually start conducting
>well below 1uA, so I feel confident that the 1N4104 will do the job for you.
 
Thanks for the follow up Dave.
 
>All the other zeners that I found are SMD devices, so I doubt that you'll be
>interested in any of those.
 
Well, I have worked with SMD's but a wired device and could use on at
a pinch (soldered to the side of the meter contact etc) bit a wired
device is probably easier.
 
>resolution. Forget about the accuracy on the low end as well (except at the
>volt marks), because you can't resolve to a basic meter accuracy
>specification of +-3% of FSD.
 
Understood. I was thinking more on the idea of when using a lower
voltage zener to be well clear of the lower voltage levels being
considered and then the potential divider to set the FSD when the
input is 15V?
 
And also, wouldn't the impact of the battery voltage changing from say
10.5 to 14.4V be lessened (re the series current limiting / biasing
resistor) if the voltage difference between the reference and the
supply is greater?
 
That seemed like the best of all worlds (for the KISS solution)?
 
Cheers, T i m
T i m <news@spaced.me.uk>: Sep 26 10:11AM +0100


>> Peter Wieck
>> Melrose Park, PA
 
>With very coarse markings you won't get accurate readings. End of relevant material. I have no motivation to argue over the simple and immaterial.
 
Doesn't that depend what you are looking for? Say I determine my LVD
should be at 11.000 volts then I would appreciate the meter being as
accurate as possible (at that point at least)?
 
Cheers, T i m
tabbypurr@gmail.com: Sep 26 06:46AM -0700

On Tuesday, 26 September 2017 10:07:36 UTC+1, T i m wrote:
> supply is greater?
 
> That seemed like the best of all worlds (for the KISS solution)?
 
> Cheers, T i m
 
You want a zener with a nice straight line at the low current end. One linked to from here has that.
 
 
NT
sam.markoni3@ya_oo.com: Sep 25 09:53PM -0400

I bought an antique radio for $475 at an antique store. It was sold
as-is, no returns. When I got it home, I plugged it in, and saw
sparks. Then the whole thing burst into flames. By the time the Fire
Department came, I made out the fire by tossing a 5 gallon pail of
water on it. The Fire Dept then tossed it outside and broke the
cabinet.
 
After it dried, I duct taped the cabinet back together, but I am not
certified to repair it. I will sell it for repair to anyone who is
certified to repair it, for only $65. You cant get a better deal than
that. It looks like all the tubes and transistors are still there, so
I am sure it can be fixed. It will probably need a new cord though,
that sort of melted from the flames.
 
Shipping is extra.
 
Post a reply if you want to buy it!
tabbypurr@gmail.com: Sep 25 07:59PM -0700

> that sort of melted from the flames.
 
> Shipping is extra.
 
> Post a reply if you want to buy it!
 
lol
"tom" <tmiller11147@verizon.net>: Sep 26 12:19AM -0400

<sam.markoni3@ya_oo.com> wrote in message
news:psbjsc5ip8kastet7e12pe0s3ildgfoo1e@4ax.com...
> that sort of melted from the flames.
 
> Shipping is extra.
 
> Post a reply if you want to buy it!
 
I guess you want payment by western union?
Andy Burns <usenet@andyburns.uk>: Sep 26 07:48AM +0100


> I bought an antique radio for $475 at an antique store.
Then ruined it
 
> I will sell it for repair [...] for only $65.
So you mean $0 radio for $65 ?
Rheilly Phoull <rheilly@bigslong.com>: Sep 26 05:47PM +0800

On 26/09/2017 2:48 PM, Andy Burns wrote:
> Then ruined it
 
>> I will sell it for repair [...] for only $65.
> So you mean $0 radio for $65 ?
 
KER_WOOOSH!!
oldschool@tubes.com: Sep 26 12:46AM -0400

I picked up a RCA Victor 66X2 Radio from 1946-47. It's a very unusual
radio. It is AM broadcast band and one Shortwave band. Amazingly this
radio worked right away, except for the broken dial string and a power
cord that needs to be replaced soon. All the tubes appear to be
original, and all capacitors appear to be original too. Even the filter
cap appears original, and there is no hum.
 
Other than replace the cord and dial string, I dont plan to do anything
with the components for now, except add a fuse.
 
The bakelite case is solid, but badly scratched. The bakelite under the
Ivory paint is black. This radio sold in black (unpainted - model 66X1),
Painted Ivory - Model 66X2, and two additional woodgrain models.
 
My plan is to remove the case from the chassis, remove or tape up the
grill cloth and trim. Then spray paint it with an Ivory colored spray
paint. (after sanding it with some very fine sandpaper to clean up all
scratches).
 
My question is whether I can use a common spray paint on bakelite, such
as Rustoleum? I may not get the exact color as original, but I dont see
any way to get the original paint.
 
Have any of you painted bakelite? Will common spray paint work on it?
 
One other thing, the dial bulbs are burned out. Bayonette base, wired in
series, two 3.2 volt bulbs. A schematic shows them as Mazda 1490. ( I
never heard of Mazda bulbs). Anyhow, where can I get such bulbs?
The bayonette base is the same as a #47 bulb.
 
BTW: The 6 volt feeding them comes from the filament center tap in the
35Z5 rectifier tube. How they get 6volts from that center tap evades me,
but that's how it is.....
 
 
 
Thanks
Foxs Mercantile <jdangus@att.net>: Sep 26 01:48AM -0500

> series, two 3.2 volt bulbs. A schematic shows them as Mazda 1490. ( I
> never heard of Mazda bulbs). Anyhow, where can I get such bulbs?
> The bayonette base is the same as a #47 bulb.
 
Multiple sources online show them as in stock.
 
> BTW: The 6 volt feeding them comes from the filament center tap in the
> 35Z5 rectifier tube. How they get 6volts from that center tap evades me,
> but that's how it is.....
 
A lot of things evade you.
<http://www.nostalgiaair.org/pagesbymodel/076/M0015076.pdf>
 
From the 35Z5GT data sheet:
"Glass octal type used in power supply of ac/dc receivers. The heater
is provided with a tap for operation of a panel lamp. May be supplied
with pin 1 omitted. Requires octal socket."
 
Hint: It's not "center" tapped.
 
 
 
--
Jeff-1.0
wa6fwi
http://www.foxsmercantile.com
Mike Coon <gravity@mjcoon.plus.com>: Sep 25 06:07PM +0100

In article <oqbamr$dlt$1@adenine.netfront.net>,
Dusty@DustyDustyDusty.COM says...
 
> The light on the pen drive blinks one long blink then a short one or two
> blinks.
 
> Any chance of recovery ?
 
Dunno about blinking or particular OSs. But suggest finding Disk or
Device Management instead of looking in Explorer and perhaps doing a
Format (if that option is offered). In XP, try Control Panel/Admin
Tools/Computer Mgt/Disk Mgt.
 
HTH, Mike.
Look165 <look165@numericable.fr>: Sep 25 07:19PM +0200

Dusty a écrit :
"Jonathan N. Little" <lws4art@gmail.com>: Sep 25 04:44PM -0400

Dusty wrote:
> so getting this one going would be better.
 
> What brand is the most reliable pen drive ?
> Need 32 G.
 
 
Usually no. When flash drives usually fail suddenly, without warning,
and catastrophically.
 
One thought, are you sure that you do not have a counterfeit drive. A
lot are out there especially large capacity ones.
 
<https://www.raymond.cc/blog/test-and-detect-fake-or-counterfeit-usb-flash-drives-bought-from-ebay-with-h2testw/>
 
Also look at this one, there a tons of examples online.
<https://www.youtube.com/watch?v=HaHokQ5EWv0>
Some other vids will run the previous link utils to expose the deception
without disassembling it.
 
--
Take care,
 
Jonathan
-------------------
LITTLE WORKS STUDIO
http://www.LittleWorksStudio.com
John-Del <ohger1s@gmail.com>: Sep 25 02:37PM -0700

On Monday, September 25, 2017 at 12:26:08 PM UTC-4, Dusty wrote:
> so getting this one going would be better.
 
> What brand is the most reliable pen drive ?
> Need 32 G.
 
 
 
I have fixed several for good customers by simply repairing or reflowing the solder on the USB to PC connection. You've got nothing to lose; crack it open and look the board over under a good strong loupe.
Jeff Liebermann <jeffl@cruzio.com>: Sep 25 07:14PM -0700

On Mon, 25 Sep 2017 09:25:57 -0700, Dusty <Dusty@DustyDustyDusty.COM>
wrote:
 
>Any PC I plug it into pops up a message saying the driver is now
>installed BUT it does not show anything in Windows Explorer.
 
You may have the same drive letter assigned to two different storage
devices. Go to:
Control Panel -> Admin Tools
-> Computer Management -> Disk Management
You should see you Sandisk drive but either no drive letter or
duplicating the drive letter of another drive. Right Click and
select "change drive letter and paths".
 
You may also have a broken USB connector. Many if not all USB flash
drive PCB's are not very well mechanically secured to the connector
shell. Bend the flash drive and you have a broken solder connection.
Usually, all that's needed is to resolder the connection and deal with
any broken traces. I sometimes slop on some epoxy if I want the fix
to last.
 
>What brand is the most reliable pen drive ?
>Need 32 G.
 
SanDisk seems to be the best for me.
<https://www.newegg.com/SanDisk-USB-Flash-Drives/BrandSubCat/ID-1404-522>
They make a few losers, but in general, they're the best I can buy.
I've had the SanDisk Cruzer Fit drive get a bit too hot for comfort.
 
I also have a small pile of about eight Lexar 32GB USB 3.0 (all
plastic) flash drives that crapped out one at a time. Junk.
 
If you're seriously worried about reliability, I suggest you check the
various review and rating sites.
<https://www.google.com/search?q=usb+flash+drive+reviews+2017>
This one looks useful:
<http://usb.userbenchmark.com>
 
 
--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
"Bob_S" <noone@here.com>: Sep 25 10:28PM -0400

"Dusty" wrote in message news:oqbamr$dlt$1@adenine.netfront.net...
 
Any PC I plug it into pops up a message saying the driver is now
installed BUT it does not show anything in Windows Explorer.
This happens on a Win XP Pro laptop, a Lenovo laptop and a Win 7 Pro
desktop.
 
The light on the pen drive blinks one long blink then a short one or two
blinks.
 
Any chance of recovery ?
 
Any app to explore it ?
 
It is all backed up but it will take over night to fill a new pen drive
so getting this one going would be better.
 
What brand is the most reliable pen drive ?
Need 32 G.
 
Dusty,
 
Give this free tool a try - "MiniTool Partition Wizard Free Edition"
 
http://www.minitool.com/partition-manager/partition-wizard-home.html
 
It has fixed numerous problems on flash drives that don't show in Windows
Explorer or Disk Manager. And if it says it's dead, it probably is.
 
Bob S.
Roy Tremblay <rmblayrrroy@nlnet.nl>: Sep 26 01:42AM

To Rod Speed and anyone who wants to set up a ubiquiti radio as a receiver
far from the house.
 
Mechanically the setup is this:
a. House is normal with SOHO WiFi router
b. Barn is about 200 feet away and has electricity
c. House to barn has driveway plus creek so no Ethernet cable
 
We had a half dozen spare Ubiquiti Rocket M2 radios on hand, because we
swapped them all out for Rocket M5 radios instead (for the lower noise).
<https://s26.postimg.org/86f1es2yh/radio.jpg>
 
So a bunch of us grabbed a few and set them up outside, a few hundred feet
from the house, pointing over the air back at the normal home SOHO routers.
 
The radio is powered by the POE that comes with it, with one end connected
to the 120VAC mains and the other end powers the radio. The POE has another
Ethernet RJ45 port which right now just goes into a laptop but which could
easily feed into a router and/or a camera or whatever.
 
The problem is that the home SOHO router won't cast a good signal to the
barn at about 200 feet but with this radio (whose dish alone is 30
decibels!) we can pick up the home SOHO router at 200 feet without trouble.
 
At about 200 feet line of sight from the barn to the house, we got signal
strength of over minus 65 decibels, which is pretty good, and when we
tested speeds, they were asymmetric (even though all our feeds are
symmetric) at 43 Mbps down and 17 Mbps up, which is fine for what we're
doing (since we get our Internet over the air via WISP).
 
The key to set up the Ubiquiti radio as a receiver is "station" and
"bridge" for the two tabs, "wireless" and "network".
 
The configuration file has the radio set up with the following cfg file
which can be loaded into any Ubiquiti Rocket M2 (and probably other
Ubiquiti AirOS radios).
 
I realize this is the opposite of what Rod Speed is trying to do, but I
point it out in case he wants to just set up a radio & router at his
neighbor's house 150 feet away.
 
I'm going to set up a 1 Watt spare bullet M2 with a 16dB planar antenna so
I hope my next post can be a configuration cfg file of the bullet set up to
paint his naighbor's house.
 
But until then, this is how to set up a Ubiquiti 2.4GHz radio to pick up
the SOHO router from 200 feet away from the house.
 
------------ cut here --------------
bridge.status=enabled
tshaper.status=disabled
gui.network.advanced.status=enabled
dhcp6c.status=disabled
resolv.nameserver.status=enabled
resolv.nameserver.2.status=disabled
resolv.nameserver.2.ip=
resolv.nameserver.1.status=disabled
resolv.nameserver.1.ip=
resolv.status=disabled
ppp.status=disabled
vlan.status=disabled
users.status=enabled
users.1.status=enabled
users.1.password=ubnt
users.1.name=ubnt
system.eirp.status=disabled
system.cfg.version=65546
sshd.status=enabled
sshd.port=22
route.1.devname=br0
route.1.status=enabled
route.1.comment=
route.1.gateway=192.168.1.1
route.1.netmask=0
route.1.ip=0.0.0.0
route.status=enabled
netmode=bridge
netconf.3.up=enabled
netconf.3.netmask=255.255.255.0
netconf.3.ip=192.168.1.20
netconf.3.hwaddr.mac=
netconf.3.hwaddr.status=disabled
netconf.3.alias.2.comment=Safety
netconf.3.alias.2.netmask=255.0.0.0
netconf.3.alias.2.ip=10.0.0.200
netconf.3.alias.2.status=enabled
netconf.3.alias.1.comment=Safety
netconf.3.alias.1.netmask=255.255.255.0
netconf.3.alias.1.ip=192.168.0.20
netconf.3.alias.1.status=enabled
netconf.3.autoip.status=enabled
netconf.3.role=mlan
netconf.3.mtu=1500
netconf.3.devname=br0
netconf.3.status=enabled
netconf.2.up=enabled
netconf.2.promisc=enabled
netconf.2.netmask=255.255.255.0
netconf.2.ip=0.0.0.0
netconf.2.allmulti=enabled
netconf.2.hwaddr.mac=
netconf.2.hwaddr.status=disabled
netconf.2.autoip.status=disabled
netconf.2.role=bridge_port
netconf.2.mtu=1500
netconf.2.devname=ath0
netconf.2.status=enabled
netconf.1.up=enabled
netconf.1.promisc=enabled
netconf.1.netmask=255.255.255.0
netconf.1.ip=0.0.0.0
netconf.1.hwaddr.mac=
netconf.1.hwaddr.status=disabled
netconf.1.autoip.status=disabled
netconf.1.role=bridge_port
netconf.1.mtu=1500
netconf.1.devname=eth0
netconf.1.status=enabled
netconf.status=enabled
httpd.status=enabled
httpd.https.status=enabled
httpd.https.port=443
ebtables.sys.vlan.status=disabled
ebtables.sys.status=enabled
ebtables.sys.eap.status=disabled
ebtables.sys.eap.1.status=enabled
ebtables.sys.eap.1.devname=ath0
ebtables.sys.arpnat.status=enabled
ebtables.sys.arpnat.1.status=enabled
ebtables.sys.arpnat.1.devname=ath0
ebtables.status=enabled
dhcpd.status=disabled
dhcpc.1.status=disabled
dhcpc.1.devname=br0
dhcpc.status=disabled
radio.status=enabled
radio.countrycode=840
radio.rate_module=atheros
radio.1.txpower=24
radio.1.subsystemid=0xe1b2
radio.1.status=enabled
radio.1.reg_obey=enabled
radio.1.pollingpri=
radio.1.pollingnoack=0
radio.1.polling=enabled
radio.1.obey=enabled
radio.1.mode=managed
radio.1.ieee_mode=11nght40
radio.1.dfs.status=enabled
radio.1.devname=ath0
radio.1.cwm.mode=1
radio.1.cwm.enable=0
radio.1.countrycode=840
radio.1.acktimeout=25
radio.1.ackdistance=600
radio.1.ack.auto=enabled
radio.1.forbiasauto=1
radio.1.rate.auto=enabled
radio.1.rate.mcs=15
radio.1.mcastrate=15
radio.1.chanbw=40
radio.1.antenna.id=6
radio.1.antenna.gain=24
radio.1.cable.loss=0
wireless.status=enabled
wireless.hideindoor.status=disabled
wireless.1.status=enabled
wireless.1.ssid=Birdfarm2Office
wireless.1.security.type=none
wireless.1.hide_ssid=disabled
wireless.1.devname=ath0
wireless.1.addmtikie=enabled
wireless.1.wds.status=disabled
wireless.1.authmode=1
wireless.1.scan_list.status=disabled
wireless.1.scan_list.channels=
wireless.1.ap=
aaa.1.status=disabled
aaa.status=disabled
wpasupplicant.device.1.status=disabled
wpasupplicant.status=disabled
bridge.1.comment=
bridge.1.fd=1
bridge.1.port.2.devname=ath0
bridge.1.port.2.status=enabled
bridge.1.port.1.devname=eth0
bridge.1.port.1.status=enabled
bridge.1.stp.status=disabled
bridge.1.devname=br0
bridge.1.status=enabled
gui.language=en_US
users.2.status=enabled
users.2.password=
users.2.name=guest
users.2.gid=100
users.2.uid=100
users.2.shell=/bin/false
resolv.host.1.status=enabled
resolv.host.1.name=Rocket M2
system.date.status=enabled
system.date.timestamp=092600002017
system.timezone=GMT+8
system.button.reset=enabled
update.check.status=enabled
system.latitude=
system.longitude=
------------ cut here --------------
Roy Tremblay <rmblayrrroy@nlnet.nl>: Sep 26 01:35AM

> back of my house, either on the block wall where it can be a bit sheltered
> or on the wooden barge board for the flat roof out in the weather.
 
> Preferably with POE to minimise the mechanical farting around.
 
To Rod Speed and anyone who wants to set up a ubiquiti radio as a receiver
far from the house.
 
We had a half dozen spare Ubiquiti Rocket M2 radios on hand, because we
swapped them all out for Rocket M5 radios instead (for the lower noise).
<https://s26.postimg.org/86f1es2yh/radio.jpg>
 
So a bunch of us grabbed a few and set them up outside, a few hundred feet
from the house, pointing over the air back at the normal home SOHO routers.
 
At about 200 feet line of sight from the barn to the house, we got signal
strength of over minus 65 decibels, which is pretty good, and when we
tested speeds, they were asymmetric (even though all our feeds are
symmetric) at 43 Mbps down and 17 Mbps up, which is fine for what we're
doing (since we get our Internet over the air via WISP).
 
The key to set up the Ubiquiti radio as a receiver is "station" and
"bridge" for the two tabs, "wireless" and "network".
 
The configuration file has the radio set up with the following cfg file
which can be loaded into any Ubiquiti Rocket M2 (and probably other
Ubiquiti AirOS radios).
 
------------ cut here --------------
bridge.status=enabled
tshaper.status=disabled
gui.network.advanced.status=enabled
dhcp6c.status=disabled
resolv.nameserver.status=enabled
resolv.nameserver.2.status=disabled
resolv.nameserver.2.ip=
resolv.nameserver.1.status=disabled
resolv.nameserver.1.ip=
resolv.status=disabled
ppp.status=disabled
vlan.status=disabled
users.status=enabled
users.1.status=enabled
users.1.password=ubnt
users.1.name=ubnt
system.eirp.status=disabled
system.cfg.version=65546
sshd.status=enabled
sshd.port=22
route.1.devname=br0
route.1.status=enabled
route.1.comment=
route.1.gateway=192.168.1.1
route.1.netmask=0
route.1.ip=0.0.0.0
route.status=enabled
netmode=bridge
netconf.3.up=enabled
netconf.3.netmask=255.255.255.0
netconf.3.ip=192.168.1.20
netconf.3.hwaddr.mac=
netconf.3.hwaddr.status=disabled
netconf.3.alias.2.comment=Safety
netconf.3.alias.2.netmask=255.0.0.0
netconf.3.alias.2.ip=10.0.0.200
netconf.3.alias.2.status=enabled
netconf.3.alias.1.comment=Safety
netconf.3.alias.1.netmask=255.255.255.0
netconf.3.alias.1.ip=192.168.0.20
netconf.3.alias.1.status=enabled
netconf.3.autoip.status=enabled
netconf.3.role=mlan
netconf.3.mtu=1500
netconf.3.devname=br0
netconf.3.status=enabled
netconf.2.up=enabled
netconf.2.promisc=enabled
netconf.2.netmask=255.255.255.0
netconf.2.ip=0.0.0.0
netconf.2.allmulti=enabled
netconf.2.hwaddr.mac=
netconf.2.hwaddr.status=disabled
netconf.2.autoip.status=disabled
netconf.2.role=bridge_port
netconf.2.mtu=1500
netconf.2.devname=ath0
netconf.2.status=enabled
netconf.1.up=enabled
netconf.1.promisc=enabled
netconf.1.netmask=255.255.255.0
netconf.1.ip=0.0.0.0
netconf.1.hwaddr.mac=
netconf.1.hwaddr.status=disabled
netconf.1.autoip.status=disabled
netconf.1.role=bridge_port
netconf.1.mtu=1500
netconf.1.devname=eth0
netconf.1.status=enabled
netconf.status=enabled
httpd.status=enabled
httpd.https.status=enabled
httpd.https.port=443
ebtables.sys.vlan.status=disabled
ebtables.sys.status=enabled
ebtables.sys.eap.status=disabled
ebtables.sys.eap.1.status=enabled
ebtables.sys.eap.1.devname=ath0
ebtables.sys.arpnat.status=enabled
ebtables.sys.arpnat.1.status=enabled
ebtables.sys.arpnat.1.devname=ath0
ebtables.status=enabled
dhcpd.status=disabled
dhcpc.1.status=disabled
dhcpc.1.devname=br0
dhcpc.status=disabled
radio.status=enabled
radio.countrycode=840
radio.rate_module=atheros
radio.1.txpower=24
radio.1.subsystemid=0xe1b2
radio.1.status=enabled
radio.1.reg_obey=enabled
radio.1.pollingpri=
radio.1.pollingnoack=0
radio.1.polling=enabled
radio.1.obey=enabled
radio.1.mode=managed
radio.1.ieee_mode=11nght40
radio.1.dfs.status=enabled
radio.1.devname=ath0
radio.1.cwm.mode=1
radio.1.cwm.enable=0
radio.1.countrycode=840
radio.1.acktimeout=25
radio.1.ackdistance=600
radio.1.ack.auto=enabled
radio.1.forbiasauto=1
radio.1.rate.auto=enabled
radio.1.rate.mcs=15
radio.1.mcastrate=15
radio.1.chanbw=40
radio.1.antenna.id=6
radio.1.antenna.gain=24
radio.1.cable.loss=0
wireless.status=enabled
wireless.hideindoor.status=disabled
wireless.1.status=enabled
wireless.1.ssid=Birdfarm2Office
wireless.1.security.type=none
wireless.1.hide_ssid=disabled
wireless.1.devname=ath0
wireless.1.addmtikie=enabled
wireless.1.wds.status=disabled
wireless.1.authmode=1
wireless.1.scan_list.status=disabled
wireless.1.scan_list.channels=
wireless.1.ap=
aaa.1.status=disabled
aaa.status=disabled
wpasupplicant.device.1.status=disabled
wpasupplicant.status=disabled
bridge.1.comment=
bridge.1.fd=1
bridge.1.port.2.devname=ath0
bridge.1.port.2.status=enabled
bridge.1.port.1.devname=eth0
bridge.1.port.1.status=enabled
bridge.1.stp.status=disabled
bridge.1.devname=br0
bridge.1.status=enabled
gui.language=en_US
users.2.status=enabled
users.2.password=
users.2.name=guest
users.2.gid=100
users.2.uid=100
users.2.shell=/bin/false
resolv.host.1.status=enabled
resolv.host.1.name=Rocket M2
system.date.status=enabled
system.date.timestamp=092600002017
system.timezone=GMT+8
system.button.reset=enabled
update.check.status=enabled
system.latitude=
system.longitude=
------------ cut here --------------
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