Date   

Re: 3d printed case advice? #flrig

Peter Cranwell
 

Has anyone been able to get GRC Audio Sync working ?

 

From: RaspberryPi-4-HamRadio@groups.io [mailto:RaspberryPi-4-HamRadio@groups.io] On Behalf Of Troy - K4JDA
Sent: Sunday, May 17, 2020 9:10 PM
To: Tadd Torborg; RaspberryPi-4-HamRadio@groups.io
Subject: Re: [RaspberryPi-4-HamRadio] 3d printed case advice? #flrig

 

Let me see what I can do.

 

Troy Davis

K4JDA

 


From: Tadd Torborg <tadd@...>
Sent: Sunday, May 17, 2020 9:02:11 PM
To: RaspberryPi-4-HamRadio@groups.io <RaspberryPi-4-HamRadio@groups.io>; Troy - K4JDA <troy.davis@...>
Subject: Re: [RaspberryPi-4-HamRadio] 3d printed case advice? #flrig

 

Troy,

  All I have is a WRL file.   Nothing with .STL. 

Is this useful?

[tarpn.net 13.9MB]

 

Tadd / KA2DEW

tadd@...
Raleigh NC  FM05pv

North Carolina Off-The-Grid Social Network: http://ncpacket.net/north_carolina_packet_radio_network.html

Packet networking over ham radio: http://tarpn.net/t/packet_radio_networking.html

Local Raleigh ham radio info: http://torborg.com/a



On May 13, 2020, at 10:17 AM, Troy - K4JDA <troy.davis@...> wrote:

 

Tadd, if you can get me a 3D model (STEP), I can build a case design using that and produce the STLs ... will publish all of that here or in the nino group.

Alternatively, DXF would be OK and I can pull the 3D from that and the components.

 


Re: 3d printed case advice? #flrig

Troy - K4JDA
 

Let me see what I can do.

Troy Davis
K4JDA


From: Tadd Torborg <tadd@...>
Sent: Sunday, May 17, 2020 9:02:11 PM
To: RaspberryPi-4-HamRadio@groups.io <RaspberryPi-4-HamRadio@groups.io>; Troy - K4JDA <troy.davis@...>
Subject: Re: [RaspberryPi-4-HamRadio] 3d printed case advice? #flrig
 
Troy,
  All I have is a WRL file.   Nothing with .STL. 
Is this useful?
[tarpn.net 13.9MB]

Tadd / KA2DEW
tadd@...
Raleigh NC  FM05pv

North Carolina Off-The-Grid Social Network: http://ncpacket.net/north_carolina_packet_radio_network.html
Packet networking over ham radio: http://tarpn.net/t/packet_radio_networking.html
Local Raleigh ham radio info: http://torborg.com/a

On May 13, 2020, at 10:17 AM, Troy - K4JDA <troy.davis@...> wrote:

Tadd, if you can get me a 3D model (STEP), I can build a case design using that and produce the STLs ... will publish all of that here or in the nino group.

Alternatively, DXF would be OK and I can pull the 3D from that and the components.


Re: W3DJS Raspberry Pi Ham Radio Image v2.0 Released

Santiago Mejia
 

Hi, everybody. New to the group and new to Raspberry Pi, just using an old Pi 3. A rookie question: can I run this image on a Pi already on use or it has to be a blank card?

73 de HI8SMX, Santiago 


Re: WxtoImg and Pi4

Eric
 

On Fri, May 15, 2020 at 04:07 PM, VK2AHB wrote:
Hi Paul,
yes indeed, last night after qso with a friend who leads the tests from the other end of France, he advised me to resume the installation from 0 because at home it works. For my part I realized this morning that the problem comes from the sdr key whose pll goes into a spin. This explains why there is no reception. do the test, install the key on a pc, put sdrsharp, put on the weather robot and change the frequency if the robot is still there is that either the driver is badly installed, or the pll picks up.
see you soon

73 Eric


Re: 3d printing

Box1600
 

Hi David,

Any questions I've had have been answered by folks online in different places.

I haven't really had any mechanical issues with it, (knock on wood).

The printer comes 90% assembled.

There are also some good YouTube videos.

It took me a while to really get the bed levelled right and getting the adhesion right but being a newbe at the time probably explains that.

73 - Bill KA8VIT



From: RaspberryPi-4-HamRadio@groups.io <RaspberryPi-4-HamRadio@groups.io> on behalf of DavidC KD4E <qrv@...>
Sent: Friday, May 15, 2020 9:08 PM
To: RaspberryPi-4-HamRadio@groups.io <RaspberryPi-4-HamRadio@groups.io>
Subject: Re: [RaspberryPi-4-HamRadio] 3d printing
 
They appear to work really hard to conceal their corporate home,
so I take it that they're Chinese-owned?

The Tevo Tornado shows as $399. and out of stock, a refurbished one
at $299. is also out of stock.

Complaints include no support on their Web site.

Is there an active and helpful support forum?

Thanks,

David kd4e


Re: 3d printing

DavidC KD4E
 

They appear to work really hard to conceal their corporate home,
so I take it that they're Chinese-owned?

The Tevo Tornado shows as $399. and out of stock, a refurbished one
at $299. is also out of stock.

Complaints include no support on their Web site.

Is there an active and helpful support forum?

Thanks,

David kd4e



I have a Tevo Tornado.

Cost $270 USD.

It can print 11.5" wide, by 11.5  long, by 14.5" high.

All metal construction.

I love it.

73 - Bill KA8VIT


Re: WxtoImg and Pi4

VK2AHB
 

Hi Eric, 
Yes I saw that but I am using the dedicated receiver, not the SDR. Also he doesn't really get into the audio setup.
He spends a lot of effort setting up schedules,etc with scripts.  If you run wxtoimg -G you run the GUI and it will update keps, schedule, everything.  This via realVNC of course.

Paul VK2AHB


fldigi craching / freezing up

Chuck M
 

Was running 4.1.12 on one card and it would freeze up frequently. Decided to go back to version 4.1.09 on a different card. It is locking up as well.

Stymied for the moment. Any suggestions?

Testing with radio control disabled. See how that goes.

Thanks
Chuck
KD9DVB


Re: FT-891 way to sense xmit when using cat? #flrig

Seth Lavinder W8FG
 

Sorry I cannot quote specific instructions here but about a year ago I was playing around FT8 with a Pi3B and my FT-891 , For the money that FT-891 is a fantastic radio but what sucks is the menu configurations.  I had rig control USB line connected, and used a SignaLink USB audio interface.  Once I managed to dig my way through the menus I got it working.  Had FLDigi and all those loaded up.  Wish I had taken notes now.  But the whole problem stemmed around getting the radios USB-D (I think) configured correctly. 

73 de Seth - W8FG 


On May 15, 2020, at 1:00 AM, Randon Loeb <randonloeb18@...> wrote:

When using flrig is there some way for external hardware/software to know if the radio is transmitting or that PTT is pressed (virtually)?

Or maybe instead of getting that answer from the software, would the radio's physical PTT lines be read as low when flrig sends the xmit command?

Reason I'm asking is I'd like to use an rtl-sdr dongle with the pi as well to have a panadapter running, but I need to send the antenna splitter a signal to cut the feed to the dongle when the radio is transmitting. If I was keying a mic I could just tap the ptt button line, but I'm not sure what to do when the radio is sent that command with flrig.

Is there some kind of pipeline/filter in the flrig software I can tap into to see what commands are being sent to the rig? Figure then I could use a gpio pin on the pi to tell the antenna switch what to do.

Hopefully I'm making sense and folks here have some ideas.
Thanks 73, Randy  KN4YRM


Re: FT-891 way to sense xmit when using cat? #flrig

Jeff Townsend
 

The PTT should be available on the accessory connector on the back of the radio.

On May 15, 2020, at 10:22 AM, Randon Loeb <randonloeb18@...> wrote:

Thanks will do.

On Fri, May 15, 2020 at 5:04 AM Mark Griffith via groups.io <mdgriffith2003=yahoo.com@groups.io> wrote:

There is probably a way to do that by using the FLDIGI internal API, but I don't know for sure. You'd have to research the API and how it works.


Mark
KD0QYN

On Friday, May 15, 2020, 12:00:32 AM CDT, Randon Loeb <randonloeb18@...> wrote: 


When using flrig is there some way for external hardware/software to know if the radio is transmitting or that PTT is pressed (virtually)?

Or maybe instead of getting that answer from the software, would the radio's physical PTT lines be read as low when flrig sends the xmit command?

Reason I'm asking is I'd like to use an rtl-sdr dongle with the pi as well to have a panadapter running, but I need to send the antenna splitter a signal to cut the feed to the dongle when the radio is transmitting. If I was keying a mic I could just tap the ptt button line, but I'm not sure what to do when the radio is sent that command with flrig.

Is there some kind of pipeline/filter in the flrig software I can tap into to see what commands are being sent to the rig? Figure then I could use a gpio pin on the pi to tell the antenna switch what to do.

Hopefully I'm making sense and folks here have some ideas.
Thanks 73, Randy  KN4YRM




Re: FT-891 way to sense xmit when using cat? #flrig

Randon Loeb
 

Thanks will do.


On Fri, May 15, 2020 at 5:04 AM Mark Griffith via groups.io <mdgriffith2003=yahoo.com@groups.io> wrote:

There is probably a way to do that by using the FLDIGI internal API, but I don't know for sure. You'd have to research the API and how it works.


Mark
KD0QYN

On Friday, May 15, 2020, 12:00:32 AM CDT, Randon Loeb <randonloeb18@...> wrote:


When using flrig is there some way for external hardware/software to know if the radio is transmitting or that PTT is pressed (virtually)?

Or maybe instead of getting that answer from the software, would the radio's physical PTT lines be read as low when flrig sends the xmit command?

Reason I'm asking is I'd like to use an rtl-sdr dongle with the pi as well to have a panadapter running, but I need to send the antenna splitter a signal to cut the feed to the dongle when the radio is transmitting. If I was keying a mic I could just tap the ptt button line, but I'm not sure what to do when the radio is sent that command with flrig.

Is there some kind of pipeline/filter in the flrig software I can tap into to see what commands are being sent to the rig? Figure then I could use a gpio pin on the pi to tell the antenna switch what to do.

Hopefully I'm making sense and folks here have some ideas.
Thanks 73, Randy  KN4YRM


Re: FT-891 way to sense xmit when using cat? #flrig

Mark Griffith
 


There is probably a way to do that by using the FLDIGI internal API, but I don't know for sure. You'd have to research the API and how it works.


Mark
KD0QYN

On Friday, May 15, 2020, 12:00:32 AM CDT, Randon Loeb <randonloeb18@...> wrote:


When using flrig is there some way for external hardware/software to know if the radio is transmitting or that PTT is pressed (virtually)?

Or maybe instead of getting that answer from the software, would the radio's physical PTT lines be read as low when flrig sends the xmit command?

Reason I'm asking is I'd like to use an rtl-sdr dongle with the pi as well to have a panadapter running, but I need to send the antenna splitter a signal to cut the feed to the dongle when the radio is transmitting. If I was keying a mic I could just tap the ptt button line, but I'm not sure what to do when the radio is sent that command with flrig.

Is there some kind of pipeline/filter in the flrig software I can tap into to see what commands are being sent to the rig? Figure then I could use a gpio pin on the pi to tell the antenna switch what to do.

Hopefully I'm making sense and folks here have some ideas.
Thanks 73, Randy  KN4YRM


Re: WxtoImg and Pi4

Eric
 

Gm Paul
raspi 3 or 4 , prob is the same..we are on since 1 month..do you follow this url to install ? may be you have a mail which give infos in  /var/mail.. 

73 Eric F1SMV


FT-891 way to sense xmit when using cat? #flrig

Randon Loeb
 

When using flrig is there some way for external hardware/software to know if the radio is transmitting or that PTT is pressed (virtually)?

Or maybe instead of getting that answer from the software, would the radio's physical PTT lines be read as low when flrig sends the xmit command?

Reason I'm asking is I'd like to use an rtl-sdr dongle with the pi as well to have a panadapter running, but I need to send the antenna splitter a signal to cut the feed to the dongle when the radio is transmitting. If I was keying a mic I could just tap the ptt button line, but I'm not sure what to do when the radio is sent that command with flrig.

Is there some kind of pipeline/filter in the flrig software I can tap into to see what commands are being sent to the rig? Figure then I could use a gpio pin on the pi to tell the antenna switch what to do.

Hopefully I'm making sense and folks here have some ideas.
Thanks 73, Randy  KN4YRM


Re: 3d printing

tom@...
 

I started in 3D printing about 3 years ago with an XYZ printer and it never really did the job and had to send it back for warranty repair (wifi issue), it is back in the garage unopened. I then bought a Prusa MK3 kit. The Prusa completed 510 days of of printing before a failed print jamed the print head, broke some of the ABS/TPU parts and melted a cable. I ordered a new cable and the 3S upgrade kit and it is now doing even better prints. I am very happy with it. I would buy another Prusa I3 MK3s right now if I could figure out how to get it in the house without being murdered.

Cheers
Tom VK2VC


WxtoImg and Pi4

VK2AHB
 

Hi All,
New member here but Ham for over 40 years and fairly new Pi-man.
I've been decoding APT satellites for around 20 years, started on my yacht using the Hamtronics R139 and a Tall narrow QFH.  Worked well on the boat, getting sigs below the horizon.
Its been sitting in the cupboard for a few since since i came back to land, but got it out a while ago and got good pictures here in Bathurst NSW, elevation 700m.
The W7 PC I was running it on died after a very near lightning strike. ( Lots of other damage too, a new IC-7300 on the way.).
Anyway, I moved WxtoImg to the injured Laptop, only lost Ethernet but all else seems OK.  I don't know if it was coincidental but the laptop has been running very slow.  The result was that the WxtoImg pics, while decoding OK have a jagged edge. As it decodes, it slopes despite the calibration being correct. The decodes are fine.

So, to come to the point, I thought I'd try the Pi4 for the job.
I downloaded the 2.11.2 Debian code, installed, set everything up fine.
Plugged in the USB stick, ran aplay -l, it was there.
Set Wx  recording input to USB, hw:1,0 then tried to run.  First thing it complained I didn't have alsamixergui installed.  Did that, and then I got an error message
Device Not found, -9700 Invalid sample rate, check sound card settings...
If I select pulse as the input it runs but of course there is no input.
If I select Mixer, the program then fires up alsamixergui which only  shows the default audio, master and capture.  I can't get the gui to select the USB card. If I run alsamixergui --card=1, then it shows the mic and spkr settings.
So, frustration!
Any ideas?
Paul VK2AHB


Re: 3d printing

Fred Hillhouse
 

Thank you for all the suggestions!

 

Best regards,

Fred N7FMH

 

From: RaspberryPi-4-HamRadio@groups.io [mailto:RaspberryPi-4-HamRadio@groups.io] On Behalf Of Fred Hillhouse
Sent: Wednesday, May 13, 2020 3:09 PM
To: RaspberryPi-4-HamRadio@groups.io
Subject: Re: [RaspberryPi-4-HamRadio] 3d printing

 

This goes OT but what 3D printers are any of you using? I keep looking at them but would like to get something others have used and have a good review of?

 

Thanks!

 

Fred N7FMH

 

From: RaspberryPi-4-HamRadio@groups.io [mailto:RaspberryPi-4-HamRadio@groups.io] On Behalf Of Chuck M via groups.io
Sent: Wednesday, May 13, 2020 1:28 PM
To: RaspberryPi-4-HamRadio@groups.io
Subject: Re: [RaspberryPi-4-HamRadio] 3d printing

 

Kept getting some temperature errors.  Some investigating on extruder connections found broken thermistor wire.  So my printer is down for a while.  

 

Getting new ones ordered from Amazon. Multi package so I'll have spares.  

 

73s

Chuck

KD9DVB

 

 

On Tue, May 12, 2020 at 11:03 PM, Tadd KA2DEW in NC via groups.io

<tadd@...> wrote:

Nino designed it with KiCad.  I will inquire on what dimensional exports exist.   

Tadd -- KA2DEW 

 

On May 12, 2020, at 9:14 PM, Randon Loeb <randonloeb18@...> wrote:



I like this idea of combining the various peripherals with the pi under one large fan. I was thinking too it isn't really necessary to go the "usual" route of cooling the pi off a 5v fan, may as well just tap the 12v and go with a more powerful fan.

 

On Tue, May 12, 2020 at 5:06 PM Chuck M via groups.io <cam51mail=yahoo.com@groups.io> wrote:

Like these meters for power monitoring from eBay.  Mine are 20 amps, no shunt.  The 50 and 100 amp models are basically same but have external shunt.  Couple of different case styles printed for them.  Second photo have used Command strips to hold  meter in place.

Inexpensive 12 VDC fans from hamfest, think paid around $1 each.  Printed legs.  Do good job keeping radio and RPi, if needed, running cool.

 

<IMG_20200512_165340.jpg>

 

<IMG_20200512_165356.jpg>

 

<IMG_20200512_165431.jpg>

 


73s

Chuck

KD9DVB

 

On Tue, May 12, 2020 at 4:48 PM, Box1600

<box1600@...> wrote:

I've printed a couple of different Raspberry Pi cases one that I've found on Thingiverse.com or Pinshape.com.

 

One has a mounting for a fan (15mm if I recall).

 

The other is bigger and has a cut out/bezel for a 3.5 TFT color display.

 

Maybe some mounting holes or brackets ?

 

Maybe space within the enclosure for the USB sound dongle and a short USB cable ?

 

<KIMG0050.jpg>

 

<KIMG0052.jpg>

 

<KIMG0053.jpg>

 

 

73 - Bill KA8VIT

 


From: RaspberryPi-4-HamRadio@groups.io <RaspberryPi-4-HamRadio@groups.io> on behalf of Randon Loeb <randonloeb18@...>
Sent: Monday, May 11, 2020 7:22 PM
To: RaspberryPi-4-HamRadio@groups.io <RaspberryPi-4-HamRadio@groups.io>
Subject: [RaspberryPi-4-HamRadio] 3d printed case advice? #flrig

 

Are there particular gotchas in cases for ham-related pis? I don't plan on any hats, idea will be just flrig 
to control ft-891 and audio via usb sound dongle, maybe usb gps for time. 

Other than the usual ventilation for these hot-running pis, anything else I'll wish I had planned for? Only 
other thing I can think of is maybe to have the case hold the buck converter for the 12v->5v.

I will 3d print it myself, have done so for a handful of 3b+s for various uses, though could buy if price is not ridiculous.

Thanks 
Randy KN4YRM

 


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Re: fldigi flrig freezing up

N3RDR
 

Yes.  Not on Pi but on my Mac.  As much as I like flrig, I use it to make sure all my drivers and cables are good. For some reason apps that use it for control have some kind of issue.  Like you, I use hamlib.

On May 14, 2020, at 2:48 PM, Chuck M via groups.io <cam51mail@...> wrote:

Pi 4B+ 4 GB memory, buster
flrig v1.3.5 connected to  a CS108G+ radio
radio set up as Icom 7200 because my radio not in its config files
set up string for comm port:  
/dev/serial/by-id/usb-CQXiEGULinzhian_CQXIEGUirtual_COM_Port_48F5673D3234-if00
flidigi V1.12 running psk31.

Earlier versions of fldigi included hamlib support.  Could control radio directly from fldigi with hamlib, didn't need flrig.   Not in this version.  Did check fldigi forum and hopefully will be again in a future version.  Thus my switch to flrig.  Did get occasional lockups, but not very often.

Getting frequent lockup / freezing of fldigi.  Waterfall stops, macros show up, but does not transmit.
can still control radio with flrig, but fldigi remains frozen.  Occasionaly freezes when transmitting.  Have to turn off radio to stop.

Anyone else having similar issues?  

Thanks for whatever help you can provide.

Chuck
KD9DVB




would freeze up occassionaly, but not as often.  


fldigi flrig freezing up

Chuck M
 

Pi 4B+ 4 GB memory, buster
flrig v1.3.5 connected to  a CS108G+ radio
radio set up as Icom 7200 because my radio not in its config files
set up string for comm port:  
/dev/serial/by-id/usb-CQXiEGULinzhian_CQXIEGUirtual_COM_Port_48F5673D3234-if00
flidigi V1.12 running psk31.

Earlier versions of fldigi included hamlib support.  Could control radio directly from fldigi with hamlib, didn't need flrig.   Not in this version.  Did check fldigi forum and hopefully will be again in a future version.  Thus my switch to flrig.  Did get occasional lockups, but not very often.

Getting frequent lockup / freezing of fldigi.  Waterfall stops, macros show up, but does not transmit.
can still control radio with flrig, but fldigi remains frozen.  Occasionaly freezes when transmitting.  Have to turn off radio to stop.

Anyone else having similar issues?  

Thanks for whatever help you can provide.

Chuck
KD9DVB




would freeze up occassionaly, but not as often.  


Re: 3d printing

Box1600
 

I have a Tevo Tornado.

Cost $270 USD.

It can print 11.5" wide, by 11.5  long, by 14.5" high.

All metal construction.

I love it.

73 - Bill KA8VIT


From: RaspberryPi-4-HamRadio@groups.io <RaspberryPi-4-HamRadio@groups.io> on behalf of Fred Hillhouse <fmhillhouse@...>
Sent: Wednesday, May 13, 2020 3:09 PM
To: RaspberryPi-4-HamRadio@groups.io <RaspberryPi-4-HamRadio@groups.io>
Subject: Re: [RaspberryPi-4-HamRadio] 3d printing
 

This goes OT but what 3D printers are any of you using? I keep looking at them but would like to get something others have used and have a good review of?

 

Thanks!

 

Fred N7FMH

 

From: RaspberryPi-4-HamRadio@groups.io [mailto:RaspberryPi-4-HamRadio@groups.io] On Behalf Of Chuck M via groups.io
Sent: Wednesday, May 13, 2020 1:28 PM
To: RaspberryPi-4-HamRadio@groups.io
Subject: Re: [RaspberryPi-4-HamRadio] 3d printing

 

Kept getting some temperature errors.  Some investigating on extruder connections found broken thermistor wire.  So my printer is down for a while.  

 

Getting new ones ordered from Amazon. Multi package so I'll have spares.  

 

73s

Chuck

KD9DVB

 

 

On Tue, May 12, 2020 at 11:03 PM, Tadd KA2DEW in NC via groups.io

<tadd@...> wrote:

Nino designed it with KiCad.  I will inquire on what dimensional exports exist.   

Tadd -- KA2DEW 



On May 12, 2020, at 9:14 PM, Randon Loeb <randonloeb18@...> wrote:



I like this idea of combining the various peripherals with the pi under one large fan. I was thinking too it isn't really necessary to go the "usual" route of cooling the pi off a 5v fan, may as well just tap the 12v and go with a more powerful fan.

 

On Tue, May 12, 2020 at 5:06 PM Chuck M via groups.io <cam51mail=yahoo.com@groups.io> wrote:

Like these meters for power monitoring from eBay.  Mine are 20 amps, no shunt.  The 50 and 100 amp models are basically same but have external shunt.  Couple of different case styles printed for them.  Second photo have used Command strips to hold  meter in place.

Inexpensive 12 VDC fans from hamfest, think paid around $1 each.  Printed legs.  Do good job keeping radio and RPi, if needed, running cool.

 

<IMG_20200512_165340.jpg>

 

<IMG_20200512_165356.jpg>

 

<IMG_20200512_165431.jpg>

 


73s

Chuck

KD9DVB



On Tue, May 12, 2020 at 4:48 PM, Box1600

<box1600@...> wrote:

I've printed a couple of different Raspberry Pi cases one that I've found on Thingiverse.com or Pinshape.com.

 

One has a mounting for a fan (15mm if I recall).

 

The other is bigger and has a cut out/bezel for a 3.5 TFT color display.

 

Maybe some mounting holes or brackets ?

 

Maybe space within the enclosure for the USB sound dongle and a short USB cable ?

 

<KIMG0050.jpg>

 

<KIMG0052.jpg>

 

<KIMG0053.jpg>

 

 

73 - Bill KA8VIT

 


From: RaspberryPi-4-HamRadio@groups.io <RaspberryPi-4-HamRadio@groups.io> on behalf of Randon Loeb <randonloeb18@...>
Sent: Monday, May 11, 2020 7:22 PM
To: RaspberryPi-4-HamRadio@groups.io <RaspberryPi-4-HamRadio@groups.io>
Subject: [RaspberryPi-4-HamRadio] 3d printed case advice? #flrig

 

Are there particular gotchas in cases for ham-related pis? I don't plan on any hats, idea will be just flrig 
to control ft-891 and audio via usb sound dongle, maybe usb gps for time. 

Other than the usual ventilation for these hot-running pis, anything else I'll wish I had planned for? Only 
other thing I can think of is maybe to have the case hold the buck converter for the 12v->5v.

I will 3d print it myself, have done so for a handful of 3b+s for various uses, though could buy if price is not ridiculous.

Thanks 
Randy KN4YRM




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