Re: Proper pi9k6 configuration for AX.25 and PAT
Correct, I am using the DB-9 on the TNC.? I may flash them into standalone mode and test them individually with winlink on my laptop.
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Re: Proper pi9k6 configuration for AX.25 and PAT
Side note, the 12/96 jumper is for the mini 6 connector.? Are you using the DB9 connector on the TNC?
Mat
On Fri, Feb 4, 2022 at 12:09 PM KN6FOA < mskurnik@...> wrote: I am using a cable from HamMadeParts.com that connects to the 6-pin data connector and terminates to a DB-9.? I got all three of my Pi9k6's from etsy.? The jumper is set to 1200 I thought of that last night.? I'm starting to wonder if it is some heavy QRM here from an external source to be honest.? I need to try testing this all at a different location.
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Re: Proper pi9k6 configuration for AX.25 and PAT
Each one is tested in stand alone mode and then I flash them with the Pi firmware.? Do the yellow and red leds come on at any time?? You can flash them back to the stand alone mode and plug them into a windows laptop and do a quick winlink session as a test as well.
Mat
"?I'm starting to wonder if it is some heavy QRM here from an external source to be honest."
Have you tried listening to the the radio? How does it sound? You should be able to hear QRM.? Does the radio have an S meter, does it show reception of any signal when you are testing?
Have you tried plugging in a mic and making a contact to test the audio?
Max
On Friday, February 4, 2022, 01:09:10 PM CST, KN6FOA < mskurnik@...> wrote:
I am using a cable from HamMadeParts.com that connects to the 6-pin data connector and terminates to a DB-9.? I got all three of my Pi9k6's from etsy.? The jumper is set to 1200 I thought of that last night.? I'm starting to wonder if it is some heavy QRM here from an external source to be honest.? I need to try testing this all at a different location.
|
Re: Proper pi9k6 configuration for AX.25 and PAT
"?I'm starting to wonder if it is some heavy QRM here from an external source to be honest."
Have you tried listening to the the radio? How does it sound? You should be able to hear QRM.? Does the radio have an S meter, does it show reception of any signal when you are testing?
Have you tried plugging in a mic and making a contact to test the audio?
Max
On Friday, February 4, 2022, 01:09:10 PM CST, KN6FOA <mskurnik@...> wrote:
I am using a cable from HamMadeParts.com that connects to the 6-pin data connector and terminates to a DB-9.? I got all three of my Pi9k6's from etsy.? The jumper is set to 1200 I thought of that last night.? I'm starting to wonder if it is some heavy QRM here from an external source to be honest.? I need to try testing this all at a different location.
|
Re: Proper pi9k6 configuration for AX.25 and PAT
I am using a cable from HamMadeParts.com that connects to the 6-pin data connector and terminates to a DB-9.? I got all three of my Pi9k6's from etsy.? The jumper is set to 1200 I thought of that last night.? I'm starting to wonder if it is some heavy QRM here from an external source to be honest.? I need to try testing this all at a different location.
|
Re: Proper pi9k6 configuration for AX.25 and PAT
Also make sure you have the 1200/9600 jumper in the right place.
This selects which pin on the 6 pin mini din is used for receive
audio. Ideally Input peaks need to be above +-20000.
73,
John
On 04/02/2022 15:57, David Ranch wrote:
toggle quoted message
Show quoted text
Based on that output, it seems the pi9k6 isn't hearing anything.?
I assume you're putting the audio out of your TM-V71A via the 6pin
DATA jack so check the cabling from the radio to the TNC.? If that
seems ok, the next step would be to either increase the RX level
on the pi9k6 (move away from "auto" to some fixed level) and/ or
you can also increase the level out of the V71.? To change the V71
level, you have to use Kenwood's windows-only MCP-2A utility:
??
If neither of those settings help your input RX level, you might
consider installing the pi9k6 soundcard alternative firmware and
see if you can record the incoming audio just like a standard
soundcard.? If you can't hear anything from your audio captures
there, you might have something wrong with the pi9k6.? Was this a
kit you assembled??
--David
KI6ZHD
On 02/04/2022 06:21 AM, KN6FOA wrote:
This is the output from the serial console connected
to the pi USB port while still connected to the hat.? Hopefully
this helps.? Also the radio is a TM-V71A
Sending
KISS frame len 16
PTT
On
Cyclic
buffer check rd 230 wr 253 len 20
totSamples
10161
PTT
Off
Input
peaks 317 -301 average 0
Level
below threshold - assume no input 317 -301 31 pk
sending
KISS frame len 16
PTT
On
Cyclic
buffer check rd 253 wr 276 len 20
totSamples
10160
PTT
Off
Input
peaks 341 -331 average 0
Level
below threshold - assume no input 341 -331 33 pk
Input
peaks 326 -289 average 0
Level
below threshold - assume no input 326 -289 30 pk
sending
KISS frame len 16
PTT
On
Cyclic
buffer check rd 276 wr 299 len 20
totSamples
10161
PTT
Off
Input
peaks 393 -269 average 11757
Level
below threshold - assume no input 393 -269 33 pk
Input
peaks 316 -293 average 0
Level
below threshold - assume no input 316 -293 30 pk
sending
KISS frame len 16
PTT
On
Cyclic
buffer check rd 299 wr 322 len 20
totSamples
10160
PTT
Off
Input
peaks 316 -302 average 0
Level
below threshold - assume no input 316 -302 31 pk
Input
peaks 292 -342 average 0
Level
below threshold - assume no input 292 -342 31 pk
Input
peaks 355 -320 average 1
Level
below threshold - assume no input 355 -320 33 pk
?
|
It's a Perl 5 script so doesn't need installing. In the terminal, type perl -v to see which version of perl, if any, you have installed. Docs are here: On 04/02/2022 11:25 Steve Sutterer <73ak0m@...> wrote:
Has anyone installed Yfktest contest logger on Bullseye or Buster? Looking for some guidance on if/how to do that.
Thanks
Steve AK0M
Nigel A. Gunn, ///shoulders.outwards.resolutions tel +1-937-971-0366 Amateur Radio G8IFF W8IFF and GMRS WRBV701, e-mail nigel@... www
|
Has anyone installed Yfktest contest logger on Bullseye or Buster? Looking for some guidance on if/how to do that.
Thanks
Steve AK0M
|
Re: Proper pi9k6 configuration for AX.25 and PAT
Based on that output, it seems the pi9k6 isn't hearing anything.? I
assume you're putting the audio out of your TM-V71A via the 6pin
DATA jack so check the cabling from the radio to the TNC.? If that
seems ok, the next step would be to either increase the RX level on
the pi9k6 (move away from "auto" to some fixed level) and/ or you
can also increase the level out of the V71.? To change the V71
level, you have to use Kenwood's windows-only MCP-2A utility:
??
If neither of those settings help your input RX level, you might
consider installing the pi9k6 soundcard alternative firmware and see
if you can record the incoming audio just like a standard
soundcard.? If you can't hear anything from your audio captures
there, you might have something wrong with the pi9k6.? Was this a
kit you assembled??
--David
KI6ZHD
On 02/04/2022 06:21 AM, KN6FOA wrote:
toggle quoted message
Show quoted text
This is the output from the serial console connected
to the pi USB port while still connected to the hat.? Hopefully
this helps.? Also the radio is a TM-V71A
Sending
KISS frame len 16
PTT
On
Cyclic
buffer check rd 230 wr 253 len 20
totSamples
10161
PTT
Off
Input
peaks 317 -301 average 0
Level
below threshold - assume no input 317 -301 31 pk
sending
KISS frame len 16
PTT
On
Cyclic
buffer check rd 253 wr 276 len 20
totSamples
10160
PTT
Off
Input
peaks 341 -331 average 0
Level
below threshold - assume no input 341 -331 33 pk
Input
peaks 326 -289 average 0
Level
below threshold - assume no input 326 -289 30 pk
sending
KISS frame len 16
PTT
On
Cyclic
buffer check rd 276 wr 299 len 20
totSamples
10161
PTT
Off
Input
peaks 393 -269 average 11757
Level
below threshold - assume no input 393 -269 33 pk
Input
peaks 316 -293 average 0
Level
below threshold - assume no input 316 -293 30 pk
sending
KISS frame len 16
PTT
On
Cyclic
buffer check rd 299 wr 322 len 20
totSamples
10160
PTT
Off
Input
peaks 316 -302 average 0
Level
below threshold - assume no input 316 -302 31 pk
Input
peaks 292 -342 average 0
Level
below threshold - assume no input 292 -342 31 pk
Input
peaks 355 -320 average 1
Level
below threshold - assume no input 355 -320 33 pk
?
|
Re: Proper pi9k6 configuration for AX.25 and PAT
This is the output from the serial console connected to the pi USB port while still connected to the hat.? Hopefully this helps.? Also the radio is a TM-V71A
toggle quoted message
Show quoted text
Sending KISS frame len 16
PTT On
Cyclic buffer check rd 230 wr 253 len 20
totSamples 10161
PTT Off
Input peaks 317 -301 average 0
Level below threshold - assume no input 317 -301 31 pk
sending KISS frame len 16
PTT On
Cyclic buffer check rd 253 wr 276 len 20
totSamples 10160
PTT Off
Input peaks 341 -331 average 0
Level below threshold - assume no input 341 -331 33 pk
Input peaks 326 -289 average 0
Level below threshold - assume no input 326 -289 30 pk
sending KISS frame len 16
PTT On
Cyclic buffer check rd 276 wr 299 len 20
totSamples 10161
PTT Off
Input peaks 393 -269 average 11757
Level below threshold - assume no input 393 -269 33 pk
Input peaks 316 -293 average 0
Level below threshold - assume no input 316 -293 30 pk
sending KISS frame len 16
PTT On
Cyclic buffer check rd 299 wr 322 len 20
totSamples 10160
PTT Off
Input peaks 316 -302 average 0
Level below threshold - assume no input 316 -302 31 pk
Input peaks 292 -342 average 0
Level below threshold - assume no input 292 -342 31 pk
Input peaks 355 -320 average 1
Level below threshold - assume no input 355 -320 33 pk
?
|
Re: Proper pi9k6 configuration for AX.25 and PAT
The default params are:
TXDELAY 30
PERSIST 64
SLOTTIME 10
TXTAIL 0
FULLDUP 0
KISSCHANNEL 0
I2CADDRESS 30
Baud 12
Centre Freq 170
RX Level?? 0
TX Level?? 30
centreFreq? 1700
?
I2C Address isn't used - that is set in the config when building the
software.
As it seems you are transmitting ok then the chances are the out of
range parameter values are being ignored.
You have the RX Level set to auto. This normally works ok, so long
as you are using unsquelched audio, but it would be worth checking
that the received audio is in range.? If you have #define MONPORT
Serial in TeensyConfigPacket.h then debug output will be written to
the USB port. So if you connect the USB port either to the pi or
another host and run a terminal program on it you should be able to
get a better idea of what is going on.
Although the TNC works on i2c the interface isn't very efficient, so
you you need more than one and have a spare USB port I suggest you
use the USB host interface instead if i2c.
73,
John
On 02/02/2022 20:48, KN6FOA wrote:
toggle quoted message
Show quoted text
I am having issues with getting AX.25 to work correctly with PAT.
I was finally able to build the firmware and flash the Arduino
with the I2C settings for my pi9k6 TNCs.?I am using "sudo i2ckiss 1
8 wl2k 127.0.0.1" to bind to the AX.25 port "wl2k" which
is defined as "wl2k KN6FOA-10 1200 255 7 Winlink" in the
axports file.
I am attempting to connect to a gateway running 1200 baud PACKET
and I can hear data being sent by listening on another radio and I
can hear responses from the RMS on the radio attached to the TNC
but it does not seem to want to lock to the station.? PAT just
returns "Unable to establish connection to remote: Dial timeout"
and never fully connects.? I know the radio and the cable works as
plugging it into a Kantronics TNC to my laptop works so I'm sure
it is either a software config issue or something to do with the
pi9k6.? I have pasted my TNC settings below to see if it is
something there that needs to be adjusted.
pitnc_getparams
Version 0.0.0.5
?
?
?TNC Software Version? ? ? ? ? 14
01
TXDelay - Zero means use ADC? 40
02
Persistance? ? ? ? ? ? ? ? ? ? 3
03
Slottime (in 10 mS)? ? ? ? ? ? 1
04
TXTail? ? ? ? ? ? ? ? ? ? ? ? ?1
05
Full Duplex - Not used? ? ? ? ?0
06
Our Channel (Hex)? ? ? ? ? ? ?ff
07
I2C Address (0 = async) Hex? ?ff
08
Mode Speed? ? ? ? ? ? ? ? ? 1200
09
RX Level (Config)? ? ? ? ? ? ? 0
10
TX Level? ? ? ? ? ? ? ? ? ? ? ?8
11
RX Level (Actual)? ? ? ? ? ? ? 0
13
Centre Freq? ? ? ? ? ? ? ? ?2550
Using " sudo
axlisten -cartt" I get the following ("I redacted the
gateway with ABC123")
wl2k:
fm KN6FOA to ABC123-10 ctl SABM+ 1643834542.429915?
wl2k:
fm KN6FOA to ABC123-10 ctl SABM+ 1643834552.502680?
wl2k:
fm KN6FOA to ABC123-10 ctl SABM+ 1643834572.982760?
wl2k:
fm KN6FOA to ABC123-10 ctl DISC+ 1643834587.475165?
?
|
Re: Proper pi9k6 configuration for AX.25 and PAT
I am using 3 TNCs on this pi to control a VHF/UHF radio, a VHF radio, and an HF radio for my go box.? By lock I mean decode.? The I2C address in the?pitnc_getparams??command does not show the i2c address after changing it in the source code but?i2cdetech?does show the addresses in use for the various TNCs.
toggle quoted message
Show quoted text
? ? ?0? 1? 2? 3? 4? 5? 6? 7? 8? 9? a? b? c? d? e? f
00:? ? ? ? ? ? ? ? ? ? ? ? ?08 09 -- -- -- -- -- --?
10: -- -- 12 -- -- -- -- -- -- -- -- -- -- -- -- --?
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --?
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --?
40: -- -- -- -- -- -- -- -- 48 -- -- -- -- -- -- --?
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --?
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --?
70: -- -- -- -- -- -- -- --? ? ? ? ? ? ? ? ? ? ? ? ?
?
|
Re: Proper pi9k6 configuration for AX.25 and PAT
Hello KN6FOA,
I was finally able to build the firmware and flash the
Arduino with the I2C settings for my pi9k6 TNCs.?I am using "sudo i2ckiss 1
8 wl2k 127.0.0.1" to bind to the AX.25 port "wl2k" which
is defined as "wl2k KN6FOA-10 1200 255 7 Winlink" in the
axports file.
Two things here:
1. Are you really intending to use the PI9k6 TNC in I2C mode and not
serial mode?? This is NOT the default as the default is to use the
Raspberry Pi's build-in serial port.? The use of I2C-based I/O is
generally only used when you plan to stack multiple PI9k6 HATs on
top of each and share the I2C bus between them.
2. Do? NOT use 127.0.0.1 as the IP address on your ax0 interface as
that IP address is already used on your lo0 interface.? Use
something else such as 44.128.0.1? (a reserved AMPR address used
specifically for local only type usecases)
3. Your i2ckiss command is showing you're communicating to the I2C
address of 8 above yet in the output below, it's showing it has the
I2C address of FF.? That's not right.
I am attempting to connect to a gateway running 1200
baud PACKET and I can hear data being sent by listening on another
radio and I can hear responses from the RMS on the radio attached
to the TNC but it does not seem to want to lock to the station
When you say "lock", I assume you're saying your station is not
decoding those packet using say the "axlisten" program.? Correct?
PAT just returns "Unable to establish connection to
remote: Dial timeout" and never fully connects.? I know the radio
and the cable works as plugging it into a Kantronics TNC to my
laptop works so I'm sure it is either a software config issue or
something to do with the pi9k6.? I have pasted my TNC settings
below to see if it is something there that needs to be adjusted.
pitnc_getparams
Version 0.0.0.5
?
?
?TNC Software Version? ? ? ? ? 14
01
TXDelay - Zero means use ADC? 40
02
Persistance? ? ? ? ? ? ? ? ? ? 3
03
Slottime (in 10 mS)? ? ? ? ? ? 1
04
TXTail? ? ? ? ? ? ? ? ? ? ? ? ?1
05
Full Duplex - Not used? ? ? ? ?0
06
Our Channel (Hex)? ? ? ? ? ? ?ff
07
I2C Address (0 = async) Hex? ?ff
08
Mode Speed? ? ? ? ? ? ? ? ? 1200
09
RX Level (Config)? ? ? ? ? ? ? 0
10
TX Level? ? ? ? ? ? ? ? ? ? ? ?8
11
RX Level (Actual)? ? ? ? ? ? ? 0
13
Centre Freq? ? ? ? ? ? ? ? ?2550
An I2C address of "ff" doesn't look right to me.? Anyway, you might
look at my older TNCPi documentation as it might be helpful to you:
??
Using " sudo axlisten -cartt" I get the following ("I
redacted the gateway with ABC123")
wl2k:
fm KN6FOA to ABC123-10 ctl SABM+ 1643834542.429915?
wl2k:
fm KN6FOA to ABC123-10 ctl SABM+ 1643834552.502680?
wl2k:
fm KN6FOA to ABC123-10 ctl SABM+ 1643834572.982760?
wl2k:
fm KN6FOA to ABC123-10 ctl DISC+ 1643834587.475165
This is only showing what LInux thinks it's transmitting.? Is the
TNC actually responding, lighting up it's PTT LED, keying up the
radio?? Using another radio (HT, etc), can you hear clean AFSK
packet tones being transmitted out from your packet station?
--David
KI6ZHD
|
Proper pi9k6 configuration for AX.25 and PAT
I am having issues with getting AX.25 to work correctly with PAT. I was finally able to build the firmware and flash the Arduino with the I2C settings for my pi9k6 TNCs.?I am using " sudo i2ckiss 1 8 wl2k 127.0.0.1" to bind to the AX.25 port "wl2k" which is defined as " wl2k KN6FOA-10 1200 255 7 Winlink" in the axports file. I am attempting to connect to a gateway running 1200 baud PACKET and I can hear data being sent by listening on another radio and I can hear responses from the RMS on the radio attached to the TNC but it does not seem to want to lock to the station.? PAT just returns "Unable to establish connection to remote: Dial timeout" and never fully connects.? I know the radio and the cable works as plugging it into a Kantronics TNC to my laptop works so I'm sure it is either a software config issue or something to do with the pi9k6.? I have pasted my TNC settings below to see if it is something there that needs to be adjusted.
pitnc_getparams Version 0.0.0.5
?
? ?TNC Software Version? ? ? ? ? 14
01 TXDelay - Zero means use ADC? 40
02 Persistance? ? ? ? ? ? ? ? ? ? 3
03 Slottime (in 10 mS)? ? ? ? ? ? 1
04 TXTail? ? ? ? ? ? ? ? ? ? ? ? ?1
05 Full Duplex - Not used? ? ? ? ?0
06 Our Channel (Hex)? ? ? ? ? ? ?ff
07 I2C Address (0 = async) Hex? ?ff
08 Mode Speed? ? ? ? ? ? ? ? ? 1200
09 RX Level (Config)? ? ? ? ? ? ? 0
10 TX Level? ? ? ? ? ? ? ? ? ? ? ?8
11 RX Level (Actual)? ? ? ? ? ? ? 0
13 Centre Freq? ? ? ? ? ? ? ? ?2550
Using " sudo axlisten -cartt" I get the following ("I redacted the gateway with ABC123")
wl2k: fm KN6FOA to ABC123-10 ctl SABM+ 1643834542.429915?
wl2k: fm KN6FOA to ABC123-10 ctl SABM+ 1643834552.502680?
wl2k: fm KN6FOA to ABC123-10 ctl SABM+ 1643834572.982760?
wl2k: fm KN6FOA to ABC123-10 ctl DISC+ 1643834587.475165?
?
|
Re: HiFiberry dac+adc mated to a Rpi4
David
Thanks for helping. ?
I have tried this before but I will give it a try again.
Thanks
Tom
AE5NF ??
|
Re: HiFiberry dac+adc mated to a Rpi4
Is your Hifiberry HATT board recognized upon boot
up?? You *do* need to enable it via the /boot/config.txt file:
??
--David
KI6ZHD
On 01/30/2022 09:54 AM, Tom Flynn via
groups.io wrote:
toggle quoted message
Show quoted text
I would like to use a hifiberry dac+adc to run my SDR
radio using Quisk,?HAMLIB, FLDigi and WSJT-X software.
I cannot get the Rpi4 to recognize the hifiberry. Has anyone got the hifiberry working as a sound card and not a karaoke machine, or a Spotify streamer?
Thanks in advance
Tom
AE5NF
|
HiFiberry dac+adc mated to a Rpi4
I would like to use a hifiberry dac+adc to run my SDR radio using Quisk,?HAMLIB, FLDigi and WSJT-X software.
I cannot get the Rpi4 to recognize the hifiberry. Has anyone got the hifiberry working as a sound card and not a karaoke machine, or a Spotify streamer?
Thanks in advance
Tom
AE5NF
|
David,
Those other Pi's are long gone, so there is no way I can do any further debugging. At present I've only got two Mac Mini's (one M1, one Intel) and this new RPi 400. This afternoon I hooked up the '400 and got it going. Out of the box, it only half worked. Well, more than half. This unit must have been sitting on a shelf for a while, as a few things didn't work. One was the "suggested applications", and the other was sudo apt-get update. Both returned errors that, after doing some Googling, I found out that it is now sudo apt update. This worked and I followed it up with a sudo apt upgrade, which took mere milliseconds to complete. Actually, it took about 45 minutes, but when it was done, several things worked properly that didn't work when the '400 came out of the box. Prior to doing the upgrade, the system was unable to find my Epson network-attached printer. After the upgrade, all FB.
I still -may- need to use VNC to get to my Mac - I've got files on the iCloud Drive that I'm not sure the '400 will be able to see simply by using the network addressing. I'll test this tonight or over the weekend.
I will NOT be loading BOINC on the new '400 - got it running on the two Mac Mini's - that's enough of my computing power they are gonna get!
Anyway, thanks for everyone's comments and suggestions - on to using the new computer.
72/73, Jim K7TXA
|
When I say it went into the weeds, I meant it was
completely frozen. No amount of keyboarding or mouse movement
would get it going. Could not get to it from any other computer -
it was frozen, big time. I noticed this sort of issue would happen
with the machine having sat for days and days on end with no human
interaction. Now, I will say that it WAS doing something at one
point - I was running an application called BOINC Manager - an app
that allows multiple packages to run in the background, like the
old SETI, Rosetta, etc.
Ah.. I know BOINC and it's one of the more brutal sustained high CPU
loading applications out there.? If you turn OFF BOINC and your Rpi
remains idle for days, do you see better uptime?? If so, this could
be exposing weaknesses with cooling the Rpi, maybe the power supply
isn't as good as you think it is, etc.? Some of the other comments
from people especially the RFI interference issues are things to
consider as I've had that happen to me as well.? The power supply
power cable itself was bringing in the RFI and causing the Pi to
fritz out.? After I added a VHF-tuned ferrite to the Micro-USB side
of the cable, the fritzing went away.
It seems that if I messed with the RPi on a daily (or
so) basis, it would be fine. But if I left it alone for a long
period of time, I guess it got lonely and thought I'd abandoned
it!
I have seen examples where a remote, wifi-only attached will
seemingly stop sending daily logwatch emails, etc. but it's still
there where I can ping and SSH into it.? I believe some of this
issue has to do with very marginal wifi associations.? I could not
explain the behavior and after upgrading to a newer OS, the issue
went away.? What OS version are you running on your Pis?
--David
KI6ZHD
|
Here's where the MoPi2 hot-swap power supply hat really shines. It takes two 6-30VDC inputs, plus a charge input. Normally, your primary power goes into port 1 and your backup battery goes to port 2. The charge port keeps your backup battery charged. Set your parameters so when the primary power drops below a preset amount, it instantly switches to the backup input. If the backup input drops below a preset level, it initiates a clean shutdown of the RPi. A single button controls startup and shutdown of the RPi. For a remote site, a simple Arduino device on a DTMF decoder hooked to a receiver can send shutdown and startup to the RPi.
Available from Digikey or Pimoroni
Michael WA7SKG
Teton Amateur Radio Repeater Association (TARRA) wrote on 1/28/22 1:04 PM:
toggle quoted message
Show quoted text
Not all of us get to run from home. Some of us do have remote locations, including mountain tops, where the power (and other things) are not the greatest. I have one site that has been down for 6 months because I can't get to it.
Mick - W7CAT
----- Original Message -----
From: "Mark Griffith via groups.io"
To: "[email protected]"
Sent: Friday, January 28, 2022 02:00:19 PM
Subject: Re: [RaspberryPi-4-HamRadio] New Member Question
> Agreed.? I have had two Pi boards running for years with no issues,
using the same SD cards all that time.? They are not sitting idle either and both have very good power supplies. Most Pi boards will eventually fail if they receive too many low voltage alerts, but RF in the shack is another point of potential failure as Chuck noted.
>
> MarkKD0QYN
>
> On Friday, January 28, 2022, 12:43:20 PM CST, Chuck K4RGN wrote:
>
> Similar to the experience of?KG4PID, I have a Pi configured as a
caching DNS proxy for other machines in the house. I just checked and it's been running for 189 days straight. I agree with?KI6ZHD that rock-stable power at the correct voltage (5.1V even at max current draw) is absolutely necessary. Power dropouts are deadly. I have also noticed that Pi's can be dinged by RF in the shack if you have external interfaces like USB cables and I2C ribbons acting like antennas.
>
> 73 Chuck K4RGN
>
|
KN6FOA
Nigel Gunn, G8IFF/W8IFF
Michael WA7SKG