--- 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

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

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

* 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

 

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
> >
> >
>

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

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.

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

Answers

1. Does that change w/ the AMBE board?

not significantly

2. Does that include the possible max draw from the USB ports?

no

3. What fuse capacity do you recommend (5A, 7.5A, or 10A)?

10A

4. Is the UDR internally fused?

no, but the USB power has a 2A polysilicon resettable fuse

5. Someone previously asked about the power connector. I got the
impression that it was not a standard connector, but you will
provide both halves, or a cable (length?) that mates to the
connector. True?

It is a standard Molex RAST-5 connector (2 pcb mount RA fast-on lugs on 5mm centers in a Polarized latching shell)

We provide a 2m 14awg unfused cable with mating connector

6. Dimensions (including footprint)?

L x W x H: 180 x 120 x 80 mm

7. On how many sides are connectors (this also affects location
planning)? Any externally-visible LEDs (eg, On/TX/RX), or a header
for the user to connect same?

Front: Ethernet w link/activity LED and USB
Red-Green Led for CPU
Red-Green LED for Radio

Rear: RF and Power

-- Dean