Date   

TCP/IP Over Packet

"k7udr" <bhhoyer@...>
 

Questions that came in via email. Thanks to John for responding

Is it possible to use TCP-IP over ax25 with large MTU ?

The UDR56K implements the Linux AX.25 stack using a socket interface. Each AX.25 frame may carry a payload of up to 256 octets. (http://www.tapr.org/pub_ax25.html 2.5.5) This comes with an overhead of up to 76 octets, and is exclusive of bit-stuffing (2.2.6) which translates to about 21 frames per second in continuous, unconnected mode under perfect conditions, e.g. no packet loss.

Sometimes when describing TCP/IP or UDP/IP circuits, the MSS (Maximum Segment Size - http://en.wikipedia.org/wiki/Transmission_Control_Protocol#Maximum_segment_size) is mislabeled MTU. The MTU is governed by the transport, in this case AX.25, or 256 octets per frame. However, the Linux protocol stack will allow a larger MSS, which is fragmented over multiple AX.25 frames. (Source code http://www.cs.albany.edu/~sdc/Linux/linux/net/ax25/ax25_out.c). TCP/IP allows a MSS of 65000+ octets, but this number is impractical for any reasonable network. An MSS of 65000 over AX.25 would fragment into 256 frames or more than 10 seconds transmission under ideal 56 kbps conditions and could require a retry on a single bit error. An IP MTU is the MSS + Header (>=20 Octets) and in most AX.25 circuits the IP MTU is kept to a modest 512 octets or 2 AX.25 frames. The optimum IP MTU on the UDR56K-4 may or may not be a higher number and will require experimentation by the amateur community to come up with a specific recommendation.

What is the net throughput in tcp/ip ?

At 1:1 IP to AX.25 MTU (no fragmentation) one would see speeds approaching 31 kbps using UDP over AX.25, this would vary +/- depending on fragmentation (to lower header count under IP) and packet loss, and acknowledgement time for TCP. The radio is specified with a tx/rx turnaround at < 1.5 ms.

If your interest is truly TCP/IP you may also want to consider using the D-STAR Data Mode. It encapsulates Ethernet frames in a D-STAR packet. http://www.jarl.com/d-star/shogen.pdf 2.1 - This would provide 4.3 1430 (MSS) data per second (UDP) or approximately 49 kbps. (58% improvement).

We also believe there is room for a yet to be determined protocol that might have up to a 7000 octet MTU, basically raw IP with a few sync bits, which would approach 56 kbps of UDP on a loss less circuit.


Re: Software interface to UDR56K

Marshall Denny <MarshallDenny@...>
 

Hello,
I am interested in several project using the udr56k.

The first is testing several types of forward error correction at the higher speeds.

I what to find what works best so that we can use 56k bps under a wider range of rf conditions.  When we used 56k packet back east years ago, it was to temperamental for    general use.  I hope that a little or a lot of FEC will solve this problem.

For starters I would like to try a combination of LDPC and reed -solomon if the processor board has the throughput to do these in realtime.

Using a basic amount of FEC at lower speeds for packet could give us a guess if a higher speed is likely to work.  

Respectfully,
Marshall
AI4CM


On Mon, Apr 29, 2013 at 4:13 PM, John <john@...> wrote:
 

Hi Marshall,

Everyone is heads down leading up to Dayton.

What type of software are you planning.  It may help us understand what priorities our customers have for writing software?


--- In UniversalDigitalRadio@..., "marshalldennyai4cm" wrote:
>
> I don't want to rush NW Digital.
>
> But, I would like to get API's to the radio as they become finalized.
>
> This will allow me to start building some software before I get the radio.
>
> Respectfully,
> Marshall
> AI4CM
>




--
Respectfully,
W. Marshall Denny II
Software Development Engineer
206 734 9242 cell

For if you altogether hold your peace at this time,
then shall relief and deliverance arise to the Jews from another place;
but you and your father's house shall be destroyed:
and who knows whether you are come to the kingdom for such a time as this?  Esther 4:14 KJV


Re: Software interface to UDR56K

"John" <john@...>
 

Hi Marshall,

Everyone is heads down leading up to Dayton.

What type of software are you planning.  It may help us understand what priorities our customers have for writing software?


--- In UniversalDigitalRadio@..., "marshalldennyai4cm" wrote:
>
> I don't want to rush NW Digital.
>
> But, I would like to get API's to the radio as they become finalized.
>
> This will allow me to start building some software before I get the radio.
>
> Respectfully,
> Marshall
> AI4CM
>


Software interface to UDR56K

"marshalldennyai4cm" <MarshallDenny@...>
 

I don't want to rush NW Digital.

But, I would like to get API's to the radio as they become finalized.

This will allow me to start building some software before I get the radio.

Respectfully,
Marshall
AI4CM


Re: USB Radio Interface (URI) ?

"John" <john@...>
 


--- In UniversalDigitalRadio@..., "Douglas" wrote:
>
> All,
>
> Can the URI (from DMK Engineering Inc.) work with the UDR56K-4 to provide an additional radio interface?
>
> http://www.dmkeng.com/Products.htm
>
> v/r
> Doug (N1OBU)
>

Doug,

The Linux OS recognizes it when plugged in, but I haven't had any time to test it.  It may require some software development for any particular use.

[929191.235130] usb 1-1.1: new full-speed USB device number 11 using pxa168-ehci
[929191.367365] usb 1-1.1: New USB device found, idVendor=0d8c, idProduct=013a
[929191.367387] usb 1-1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[929191.382482] usb 1-1.1: Product: USB PnP Sound Device
[929191.387984] usb 1-1.1: Manufacturer: C-Media Electronics Inc.
[929191.401778] ALSA sound/usb/stream.c:438 11:1:1: add audio endpoint 0x1
[929191.409606] ALSA sound/usb/stream.c:438 11:2:1: add audio endpoint 0x82
[929191.417613] ALSA sound/usb/mixer.c:1192 [13] FU [Mic Playback Switch] ch = 1, val = 0/1/1
[929191.429111] ALSA sound/usb/mixer.c:454 cannot set ctl value: req = 0x4, wValue = 0x200, wIndex = 0xd00, type = 4, data = 0x18/0x0
[929191.443736] ALSA sound/usb/mixer.c:1192 [13] FU [Mic Playback Volume] ch = 1, val = 0/6096/48
[929191.452890] ALSA sound/usb/mixer.c:1192 [9] FU [Speaker Playback Switch] ch = 1, val = 0/1/1
[929191.464862] ALSA sound/usb/mixer.c:454 cannot set ctl value: req = 0x4, wValue = 0x201, wIndex = 0x900, type = 4, data = 0x18/0x0
[929191.477739] ALSA sound/usb/mixer.c:1192 [9] FU [Speaker Playback Volume] ch = 2, val = -7264/-16/48
[929191.487297] ALSA sound/usb/mixer.c:1192 [10] FU [Mic Capture Switch] ch = 1, val = 0/1/1
[929191.498861] ALSA sound/usb/mixer.c:454 cannot set ctl value: req = 0x4, wValue = 0x200, wIndex = 0xa00, type = 4, data = 0x18/0x0
[929191.512607] ALSA sound/usb/mixer.c:1192 [10] FU [Mic Capture Volume] ch = 1, val = 0/6096/384
[929191.521737] ALSA sound/usb/mixer.c:1192 [10] FU [Auto Gain Control] ch = 1, val = 0/1/1



T:  Bus=01 Lev=02 Prnt=02 Port=00 Cnt=01 Dev#= 10 Spd=12  MxCh= 0
D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0d8c ProdID=013a Rev=01.00
S:  Manufacturer=C-Media Electronics Inc.
S:  Product=USB PnP Sound Device
C:  #Ifs= 4 Cfg#= 1 Atr=80 MxPwr=100mA
I:  If#= 0 Alt= 0 #EPs= 0 Cls=01(audio) Sub=01 Prot=00 Driver=snd-usb-audio
I:  If#= 1 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
I:  If#= 2 Alt= 0 #EPs= 0 Cls=01(audio) Sub=02 Prot=00 Driver=snd-usb-audio
I:  If#= 3 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=00 Prot=00 Driver=(none)

ls -lR /dev/snd
/dev/snd:
total 0
drwxr-xr-x 2 root root       60 Apr 28 16:26 by-id
drwxr-xr-x 2 root root       60 Apr 28 16:26 by-path
crw-rw---- 1 root audio 116,  0 Apr 28 16:26 controlC0
crw-rw---- 1 root audio 116, 24 Apr 28 16:26 pcmC0D0c
crw-rw---- 1 root audio 116, 16 Apr 28 16:26 pcmC0D0p
crw-rw---- 1 root audio 116, 33 Dec 31  1969 timer

/dev/snd/by-id:
total 0
lrwxrwxrwx 1 root root 12 Apr 28 16:26 usb-C-Media_Electronics_Inc._USB_PnP_Sound_Device-00 -> ../controlC0

/dev/snd/by-path:
total 0
lrwxrwxrwx 1 root root 12 Apr 28 16:26 platform-pxa168-ehci-usb-0:1.1:1.0 -> ../controlC0

ls -lR /proc/asound/
/proc/asound/:
total 0
dr-xr-xr-x 4 root root 0 Apr 28 16:30 card0
-r--r--r-- 1 root root 0 Apr 28 16:30 cards
lrwxrwxrwx 1 root root 5 Apr 28 16:30 Device -> card0
-r--r--r-- 1 root root 0 Apr 28 16:30 devices
-r--r--r-- 1 root root 0 Apr 28 16:30 hwdep
-r--r--r-- 1 root root 0 Apr 28 16:30 pcm
-r--r--r-- 1 root root 0 Apr 28 16:30 timers
-r--r--r-- 1 root root 0 Apr 28 16:30 version

/proc/asound/card0:
total 0
-r--r--r-- 1 root root 0 Apr 28 16:30 id
dr-xr-xr-x 3 root root 0 Apr 28 16:30 pcm0c
dr-xr-xr-x 3 root root 0 Apr 28 16:30 pcm0p
-r--r--r-- 1 root root 0 Apr 28 16:30 stream0
-r--r--r-- 1 root root 0 Apr 28 16:30 usbbus
-r--r--r-- 1 root root 0 Apr 28 16:30 usbid
-r--r--r-- 1 root root 0 Apr 28 16:30 usbmixer

/proc/asound/card0/pcm0c:
total 0
-r--r--r-- 1 root root 0 Apr 28 16:30 info
dr-xr-xr-x 2 root root 0 Apr 28 16:30 sub0
-rw-r--r-- 1 root root 0 Apr 28 16:30 xrun_debug

/proc/asound/card0/pcm0c/sub0:
total 0
-r--r--r-- 1 root root 0 Apr 28 16:30 hw_params
-r--r--r-- 1 root root 0 Apr 28 16:30 info
-r--r--r-- 1 root root 0 Apr 28 16:30 status
-r--r--r-- 1 root root 0 Apr 28 16:30 sw_params

/proc/asound/card0/pcm0p:
total 0
-r--r--r-- 1 root root 0 Apr 28 16:30 info
dr-xr-xr-x 2 root root 0 Apr 28 16:30 sub0
-rw-r--r-- 1 root root 0 Apr 28 16:30 xrun_debug

/proc/asound/card0/pcm0p/sub0:
total 0
-r--r--r-- 1 root root 0 Apr 28 16:30 hw_params
-r--r--r-- 1 root root 0 Apr 28 16:30 info
-r--r--r-- 1 root root 0 Apr 28 16:30 status
-r--r--r-- 1 root root 0 Apr 28 16:30 sw_params

DE K7VE


USB Radio Interface (URI) ?

"Douglas" <dperv27@...>
 

All,

Can the URI (from DMK Engineering Inc.) work with the UDR56K-4 to provide an additional radio interface?

http://www.dmkeng.com/Products.htm

v/r
Doug (N1OBU)


Re: Power output... is it adjustable?

"k7udr" <bhhoyer@...>
 

Power output is firmware adjustable via PWM, then filtered and switched to the PA for fast turnaround. This is a low bandwidth path and is not designed for modulation.

However, you can still do amplitude modulation via the IQ modem, which is the preferred method anyway, provided you reduce the power to a more linear range like 10W.

The UDR56k is not characterized for modulations other than FSK and GMSK.

Bryan

--- In UniversalDigitalRadio@yahoogroups.com, "zl2wrw" <ross@...> wrote:



--- In UniversalDigitalRadio@yahoogroups.com, Dean Gibson AE7Q <yahoo@> wrote:

From the PDF file on the web site: TX Output Power @ 13.8VDC: 25, 10, 5 W
Are these power steps fixed in hardware, or are they soft-adjustable by firmware (eg PWM output from MCU determines DC voltage delivered to TX RF amplifier chain)?

If the TX power is adjustable over a wide range by software (ie the above mentioned PWM output), then how much bandwidth does the TX power control circuit have? (how quickly can the TX power output be changed).

If it has sufficient bandwidth, and the radio had the right firmware, would it be feasible to modulate both the phase of the TX RF and it's amplitude in order to achieve polar modulation, which would enable the use of modes like n-PSK, n-QAM, narrowband OFDM, and even SSB...


73
ZL2WRW
Ross Whenmouth


Re: Power output... is it adjustable?

"zl2wrw" <ross@...>
 

--- In UniversalDigitalRadio@yahoogroups.com, Dean Gibson AE7Q <yahoo@...> wrote:

From the PDF file on the web site: TX Output Power @ 13.8VDC: 25, 10, 5 W
Are these power steps fixed in hardware, or are they soft-adjustable by firmware (eg PWM output from MCU determines DC voltage delivered to TX RF amplifier chain)?

If the TX power is adjustable over a wide range by software (ie the above mentioned PWM output), then how much bandwidth does the TX power control circuit have? (how quickly can the TX power output be changed).

If it has sufficient bandwidth, and the radio had the right firmware, would it be feasible to modulate both the phase of the TX RF and it's amplitude in order to achieve polar modulation, which would enable the use of modes like n-PSK, n-QAM, narrowband OFDM, and even SSB...


73
ZL2WRW
Ross Whenmouth


Re: Power output... is it adjustable?

"k7udr" <bhhoyer@...>
 

From the Data Sheet:
Tx Output Power @ 13.8VDC
25, 10, 5 W

We may go lower but it becomes diminishing returns in RF Output Power vs DC Input Power.

Bryan

--- In UniversalDigitalRadio@yahoogroups.com, Michael Carey <michaelcarey@...> wrote:

Hi Everybody,

We all know the UDR56K-4 is a 25 Watt radio... but can it be turned down?

There will be times when a power output of a few hundred milliwatts
would be perfectly fine.

Michael.
VK5ZEA


Re: Power output... is it adjustable?

Dean Gibson AE7Q <yahoo@...>
 

From the PDF file on the web site: TX Output Power @ 13.8VDC: 25, 10, 5 W

On 2013-04-18 22:10, Michael Carey wrote:
Hi Everybody,

We all know the UDR56K-4 is a 25 Watt radio... but can it be turned down?

There will be times when a power output of a few hundred milliwatts
would be perfectly fine.

Michael.
V


Power output... is it adjustable?

Michael Carey <michaelcarey@...>
 

Hi Everybody,

We all know the UDR56K-4 is a 25 Watt radio... but can it be turned down?

There will be times when a power output of a few hundred milliwatts would be perfectly fine.

Michael.
VK5ZEA


Re: UDR56K-4 current draw / fuse

ka1ifq <ka1ifq@...>
 

I too have seen them on batteries inside ups units where I work, and all of the fork trucks in the building (probably over 100). I would think a slight covering of 'NoOx' compound used in electrical work or a similar grease compound would help keep the terminals connecting better.

Mike..

On 04/15/2013 03:11 PM, Nate Bargmann wrote:
* On 2013 15 Apr 13:37 -0500, k7udr wrote:
> I note that no radio manufacturer uses power-poles nor do they appear
> in any automotive, marine, aviation or appliance applications that I
> am aware of. I have used them and the experience has been similar to
> what others have reported.

Elecraft is using Power Poles mounted to the RF board on the K3. I have
found them as connectors for batteries inside a UPS.

My experience with PP connectors has been quite positive over the years.
I don't move equipmet around much any more so that probably has a
bearing on my success.

73, de Nate >>

--

"The optimist proclaims that we live in the best of all
possible worlds. The pessimist fears this is true."

Ham radio, Linux, bikes, and more: http://www.n0nb.us

--
Sent from my Suse Desktop (12.1)


Re: UDR56K-4 current draw / fuse

Dean Gibson AE7Q <yahoo@...>
 


On 2013-04-15 11:02, brad_ka3yan wrote:
...

You are totally right WRT sharing of equipment.  My mileage does vary though, when it comes to moving equipment around.  I frequently configure and reconfigure depending on the equipment I'm working with at the time.  My shack space is limited and I'm a fidgeter.  The PP connectors do make it much easier for me to change things around.

Your last sentence is an understatement (especially for the experimenter).  The convenience factor cannot be overstated, and no other connection standard that I have seen comes close.  I have a WestMountain 4012 RigRunner (12 outlets + 1 input), and with the addition of the UDR56K-4, it would be full except for the two SLA/AGM 18Ah batteries that are connected to a WestMountain PowerGate instead.  Like you, I often move things around;  I have a separate 4008 RigRunner (along with a Pelican case) that I use for portable operations.

http://www.ae7q.net/media/FixedMd.jpeg -- the UDR will replace the (spare) MFJ tuner to the right of the Heathkit digital clock.  A USB port from the UDR56K-4 will have a Prolific USB-to-serial converter connected to a Digi International PortServer TS8 (eBay: $41), that allows remote control of the the UDR56K-4 (and my other four radios† with RS232-compatible serial data ports) via the Internet‡, leaving the UDR56K-4's Ethernet port free for transparent TCP/IP over-the-air.

No, I am not a spokesperson/salesperson/investor/owner of WestMountain.  I am disappointed that they do not make a 4016 model RigRunner (grin).

-- Dean

† The ID-1 has a USB serial port, and that port is connected to the Internet via a Digi International AnywhereUSB box (eBay: $108).

‡ I don't really need to control my radios via the Internet, but from a computer in another room is nice.  I have another Digi International PortServer TS2 in the garage, so I can upload settings and memories to my IC-2820H in the car, from upstairs in the house.


Re: UDR56K-4 current draw / fuse

Nate Bargmann <n0nb@...>
 

* On 2013 15 Apr 13:37 -0500, k7udr wrote:
I note that no radio manufacturer uses power-poles nor do they appear
in any automotive, marine, aviation or appliance applications that I
am aware of. I have used them and the experience has been similar to
what others have reported.
Elecraft is using Power Poles mounted to the RF board on the K3. I have
found them as connectors for batteries inside a UPS.

My experience with PP connectors has been quite positive over the years.
I don't move equipmet around much any more so that probably has a
bearing on my success.

73, de Nate >>

--

"The optimist proclaims that we live in the best of all
possible worlds. The pessimist fears this is true."

Ham radio, Linux, bikes, and more: http://www.n0nb.us


Re: UDR56K-4 current draw / fuse

Tom Saunders <n7oep@...>
 

E.F. Johnson used them for many years on their commercial land mobile radios in the 1980s and 1990s. Don't know if they still do or not.
Tom n7oep

Sent from my iPhone (I think)

On Apr 15, 2013, at 11:37 AM, "k7udr" <bhhoyer@...> wrote:

 

I note that no radio manufacturer uses power-poles nor do they appear in any automotive, marine, aviation or appliance applications that I am aware of. I have used them and the experience has been similar to what others have reported.

The physical contact on the RAST-5 is identical to the contacts in the familiar T-Connector found on many VHF/UHF Mobile Radios. I prefer board mount connectors over pig-tails from a manufacturing perspective.

In a pinch anyone with a standard crimp tool and a couple of female quick connects can build a reliable power cable for the UDR. As John stated, please use the connector of your choice on the other end, be it power-pole, cigarette lighter etc...

Bryan - K7UDR

--- In UniversalDigitalRadio@..., Tyrell Jentink wrote:
>
> I'm still playing the PP game, and all my equipment is converted over...
> but I find them to be frustrating for all the reasons you cite, and am
> considering switching to a more secure connection.
>
> That being said, I'm a starving college kid, and only have one rig that
> moves from my desk and my Jeep quite regularly, making straight wire
> connections less feasible. I'm also concerned about wearing out a molex
> connector under heavy usage. I do want the same connector on all equipment,
> but your quite right about never interconnecting with other station's
> equipment... it's hard to even imagine a need, but I intend to carry a
> pigtail from my eventual solution to PP in my go bag, just in case.
>
> Bringing it back to topic, I'm quite used to having to build pigtails for
> all my radios. I like to preserve the factory connectors when possible, and
> run to PowerPoles from there. Complaining about the factory connector seems
> rather silly.
> On Apr 15, 2013 10:07 AM, "qrv@..." wrote:
>
> > **
> >
> >
> > Powerpoles add cost & unpredictability.
> >
> > They are not waterproof (an odd choice for emcomm), they must
> > be assembled carefully or are prone to failure, they tarnish
> > over time and only partially self-clean during connect-disconnect
> > cycles (when tarnished they demonstrate high-loss for low current
> > and high current demands), and the most common connectors are
> > unsuitable for high current apps (requiring a higher amp-rated
> > non-interconnectable version of the PP 75a vs 35a). They are
> > also easily bumped loose, creating intermittent connections, or
> > completely apart.
> >
> > I removed all of them and went back to sure-connect bare wire
> > and crimped wire connectors (they are cheap, simple, available
> > everywhere) and terminals. Reliable & simple.
> >
> > Most users almost never, if ever, interconnect with anyone nor
> > do they frequently connect and disconnect most of their gear -
> > once set up.
> >
> > IMHO, YMMV ...
> >
> > > Was there any thought into using Anderson Powerpole connectors? These
> > > seem to have grown in popularity in the Amateur community. I've
> > > converted about 80% of my equipment, including power supplies, to
> > > PP.
> > >
> > > 73, Brad KA3YAN
> >
> > --
> >
> > Thanks! & 73, KD4E.com
> > David Colburn nevils-station.com
> > I don't google I SEARCH! duckduckgo.com
> > Network: groups.yahoo.com/group/qrv
> > Restored to design-spec at Heaven's gate 1Cor15:22
> >
> >
>


Re: UDR56K-4 current draw / fuse

"k7udr" <bhhoyer@...>
 

I note that no radio manufacturer uses power-poles nor do they appear in any automotive, marine, aviation or appliance applications that I am aware of. I have used them and the experience has been similar to what others have reported.

The physical contact on the RAST-5 is identical to the contacts in the familiar T-Connector found on many VHF/UHF Mobile Radios. I prefer board mount connectors over pig-tails from a manufacturing perspective.

In a pinch anyone with a standard crimp tool and a couple of female quick connects can build a reliable power cable for the UDR. As John stated, please use the connector of your choice on the other end, be it power-pole, cigarette lighter etc...

Bryan - K7UDR

--- In UniversalDigitalRadio@yahoogroups.com, Tyrell Jentink <tyrell@...> wrote:

I'm still playing the PP game, and all my equipment is converted over...
but I find them to be frustrating for all the reasons you cite, and am
considering switching to a more secure connection.

That being said, I'm a starving college kid, and only have one rig that
moves from my desk and my Jeep quite regularly, making straight wire
connections less feasible. I'm also concerned about wearing out a molex
connector under heavy usage. I do want the same connector on all equipment,
but your quite right about never interconnecting with other station's
equipment... it's hard to even imagine a need, but I intend to carry a
pigtail from my eventual solution to PP in my go bag, just in case.

Bringing it back to topic, I'm quite used to having to build pigtails for
all my radios. I like to preserve the factory connectors when possible, and
run to PowerPoles from there. Complaining about the factory connector seems
rather silly.
On Apr 15, 2013 10:07 AM, "qrv@..." <qrv@...> wrote:

**


Powerpoles add cost & unpredictability.

They are not waterproof (an odd choice for emcomm), they must
be assembled carefully or are prone to failure, they tarnish
over time and only partially self-clean during connect-disconnect
cycles (when tarnished they demonstrate high-loss for low current
and high current demands), and the most common connectors are
unsuitable for high current apps (requiring a higher amp-rated
non-interconnectable version of the PP 75a vs 35a). They are
also easily bumped loose, creating intermittent connections, or
completely apart.

I removed all of them and went back to sure-connect bare wire
and crimped wire connectors (they are cheap, simple, available
everywhere) and terminals. Reliable & simple.

Most users almost never, if ever, interconnect with anyone nor
do they frequently connect and disconnect most of their gear -
once set up.

IMHO, YMMV ...

Was there any thought into using Anderson Powerpole connectors? These
seem to have grown in popularity in the Amateur community. I've
converted about 80% of my equipment, including power supplies, to
PP.

73, Brad KA3YAN
--

Thanks! & 73, KD4E.com
David Colburn nevils-station.com
I don't google I SEARCH! duckduckgo.com
Network: groups.yahoo.com/group/qrv
Restored to design-spec at Heaven's gate 1Cor15:22


Re: UDR56K-4 current draw / fuse

"brad_ka3yan" <bradm75@...>
 

The cost is minimal, especially in bulk. They are not waterproof, but I don't remember reading that the UDR is waterproof, so the point is moot for this conversation.

You are totally right WRT sharing of equipment. My mileage does very though when it comes to moving equipment around. I frequently configure and reconfigure depending on the equipment I'm working with at the time. My shack space is limited and I'm a fidgeter. The PP connectors do make it much easier for me to change things around.

I will of course put PP connectors on the end of the factory provided power cable. This was just a question of whether there was consideration of using PP instead of a non-standard Molex. I say "non-standard" because the OEMs can't seem to agree on a single power connector. Look at Icom's offerings. The IC-706 uses a 6-pin Molex while the IC-7000 uses a 4-pin. This doesn't even account for inconsistencies from OEM to OEM.

No worries though, I'll keep on doing what I've been doing. It was just a question.

73,
Brad KA3YAN


Re: UDR56K-4 current draw / fuse

"John D. Hays" <john@...>
 

David's points are part of the reason that engineering chose to go with the RAST 5 solution.   For those who use Anderson Pole connectors, the other end of the 2 meter cable can be mated with Anderson Pole connectors or any other type chosen by the owner. 

As a side note: Utah amateurs where some of the first to adopt Anderson Pole connectors. Later they were adopted by a number of ARES/RACES groups as a 'standard' -- however, the left-hand/right-hand orientation of the positive and negative terminals were reversed from the Utah 'standard'.  Hams in Utah relented and adopted the same orientation as other groups.


John D. Hays
K7VE
PO Box 1223, Edmonds, WA 98020-1223 
  




On Mon, Apr 15, 2013 at 10:03 AM, qrv@... <qrv@...> wrote:
 

Powerpoles add cost & unpredictability.

They are not waterproof (an odd choice for emcomm), they must
be assembled carefully or are prone to failure, they tarnish
over time and only partially self-clean during connect-disconnect
cycles (when tarnished they demonstrate high-loss for low current
and high current demands), and the most common connectors are
unsuitable for high current apps (requiring a higher amp-rated
non-interconnectable version of the PP 75a vs 35a). They are
also easily bumped loose, creating intermittent connections, or
completely apart.

I removed all of them and went back to sure-connect bare wire
and crimped wire connectors (they are cheap, simple, available
everywhere) and terminals. Reliable & simple.

Most users almost never, if ever, interconnect with anyone nor
do they frequently connect and disconnect most of their gear -
once set up.

IMHO, YMMV ...

.



Re: UDR56K-4 current draw / fuse

Tyrell Jentink <tyrell@...>
 

I'm still playing the PP game, and all my equipment is converted over... but I find them to be frustrating for all the reasons you cite, and am considering switching to a more secure connection.

That being said, I'm a starving college kid, and only have one rig that moves from my desk and my Jeep quite regularly, making straight wire connections less feasible. I'm also concerned about wearing out a molex connector under heavy usage. I do want the same connector on all equipment, but your quite right about never interconnecting with other station's equipment... it's hard to even imagine a need, but I intend to carry a pigtail from my eventual solution to PP in my go bag, just in case.

Bringing it back to topic, I'm quite used to having to build pigtails for all my radios. I like to preserve the factory connectors when possible, and run to PowerPoles from there. Complaining about the factory connector seems rather silly.

On Apr 15, 2013 10:07 AM, "qrv@..." <qrv@...> wrote:
 

Powerpoles add cost & unpredictability.

They are not waterproof (an odd choice for emcomm), they must
be assembled carefully or are prone to failure, they tarnish
over time and only partially self-clean during connect-disconnect
cycles (when tarnished they demonstrate high-loss for low current
and high current demands), and the most common connectors are
unsuitable for high current apps (requiring a higher amp-rated
non-interconnectable version of the PP 75a vs 35a). They are
also easily bumped loose, creating intermittent connections, or
completely apart.

I removed all of them and went back to sure-connect bare wire
and crimped wire connectors (they are cheap, simple, available
everywhere) and terminals. Reliable & simple.

Most users almost never, if ever, interconnect with anyone nor
do they frequently connect and disconnect most of their gear -
once set up.

IMHO, YMMV ...

> Was there any thought into using Anderson Powerpole connectors? These
> seem to have grown in popularity in the Amateur community. I've
> converted about 80% of my equipment, including power supplies, to
> PP.
>
> 73, Brad KA3YAN

--

Thanks! & 73, KD4E.com
David Colburn nevils-station.com
I don't google I SEARCH! duckduckgo.com
Network: groups.yahoo.com/group/qrv
Restored to design-spec at Heaven's gate 1Cor15:22


Re: Photo of finished product.

"k7udr" <bhhoyer@...>
 

Hi Perry,

The tooling for the cases has not been committed, so there is no final photo.

As I have said before, this is a pre-order for planning purposes. We will not be accepting dollar commitments until we are in the manufacturing queu and the design has been finalized.

Cheers,
Bryan K7UDR

--- In UniversalDigitalRadio@yahoogroups.com, "perryc" <canoeman@...> wrote:

Since these are now up for order, does anyone actually have a photograph of the finished radio other then the animated concept gif.
Be nice to actually see one before buying one.

2181 - 2200 of 2579