If you have any 1.2 Ghz duplexer or triplexer designs please forward to the group. Thanks! Dean K9PT
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Hey there, I was wondering if anyone had a good way of dealing with the RX-CS functionality that an 880, 92ad, ID-51, etc has with an ID-1? ?Why?
We've installed a 23cm repeater deck on the W4FJ stack in Richmond, VA and I've been using my 70cm mobile to call to the 23cm deck: ?UR="/W4FJ ?A"
If the 23cm has UR = "/W4FJ ?B" then all is well; otherwise, can't be heard... ?I like the RX-CS function on the 880 and was wondering if that was a later add-on due to operational considerations like the one I'm describing...
I guess the alternative is to have a mem location dedicated to the UR='/W4FJ ? B" side on the ID-1's...
73 de KJ4WLH
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Alan Knutson WB0ZKB has been making 1.2G duplexers and triplexers for us out of 4” aluminum square tubing.? The cans are about 4 ? inches high. We need to get an article published on how he does this. Erik NY9D ??
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Re: Duplexer modification
Thanks for the input guys. I have been to the manufacturers web page, sadly no can length is given, I do not blame them for that. My desire is to push the bottom of the can in to the correct length, I have made a small frame that will push and pull the bottom.
We were unable to tune one can and find a dip. So I have replaced the plunger with a threaded rod and?hope the increased adjustment and moving the bottom will get things going.
If it starts to tune then I will worry about the loop. Maybe someone has a picture of the correct loop? If the one can starts to shape up I will start to abuse the rest of them and then work on the cable lengths. I have been looking for a chart showing correct cable lengths also but this is a one step at a time project.
We have the modules in place but of course can only run Digital Data for now.
The frequencies involved are: Rx?? 1271.600 Tx???1291.600 DD?? 1251.600
Just in case that becomes relevant to this conversation.
Any other comments are welcome.
Rex AJ4GC
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Re: Duplexer modification
The loops in the cavities and the phasing lines between cavities are also the wrong lengths. We have had good luck returning 440 MHz cavities on their 3rd harmonics for 1270 MHz repeaters.?? Start by tuning the cavities to 1/3rd of your desired frequency.? i.e. 1280/3 Interestingly this gets you close but the cavities will need another tweak at 1280 MHz.? 3rd harmonic is close, but not exact.?? Starting at 1280 MHz is more difficult.? There are a lot of other modes running around and lots of false dips. Good luck with your project,? Kent WA5VJB
From: "twocats667@..."
To: D-STAR_23cm@...
Sent: Wednesday, January 1, 2014 7:19 AM
Subject: [D-STAR_23cm] Duplexer modification
?
I have a 800 mHz tx/rx duplexer that I would like to push to 23cm for a D-star repeater.
Can anyone tell me the actual length of the tx/rx tripexer cans?
I am not sure if this is even possible but the duplexer was cheap and someone must have homebrewed a 23cm duplexer before.
Rex AJ4GC
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Re: Duplexer modification
Check out the following link for info on TX/RX triplexer specs: ? ? 73 Marshall KI4MWP ?
toggle quoted message
Show quoted text
From: D-STAR_23cm@... [mailto:D-STAR_23cm@...] On Behalf Of twocats667@...
Sent: Wednesday, January 01, 2014 8:19 AM
To: D-STAR_23cm@...
Subject: [D-STAR_23cm] Duplexer modification? ? I have a 800 mHz tx/rx duplexer that I would like to push to 23cm for a D-star repeater.
Can anyone tell me the actual length of the tx/rx tripexer cans?
I am not sure if this is even possible but the duplexer was cheap and someone must have homebrewed a 23cm duplexer before.
Rex AJ4GC
|
I have a 800 mHz tx/rx duplexer that I would like to push to 23cm for a D-star repeater.
Can anyone tell me the actual length of the tx/rx tripexer cans?
I am not sure if this is even possible but the duplexer was cheap and someone must have homebrewed a 23cm duplexer before.
Rex AJ4GC
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File - D-STAR 23cm Monthly Announcement.txt
D-STAR_23cm@yahoogroups.com
D-STAR 23cm Ops -
Thanks for participating in the D-STAR 23cm group.
If you're using or experimenting with D-STAR on 23m currently let the group know how you're using D-STAR
by sending a message to the group, adding a Link in the Links area and/or Uploading a File to the Files area.
Messages & articles about how you currently or plan to use the high-speed data capability would be of particualar interest to group memebers.
By the way, there are already dozens of messages in the group's message log and
numerous files & links in the Files & Links areas about all aspects of D-STAR.
Please also let other D-STAR users, including those don't yet use D-STAR on 23cm, who aren't members of the group know about the group.
D-STAR 23cm Group
|
New file uploaded to D-STAR_23cm
D-STAR_23cm@yahoogroups.com
Hello,
This email message is a notification to let you know that
a file has been uploaded to the Files area of the D-STAR_23cm
group.
File : /High-Speed Digital Data (DD)/High-Speed Data on D-STAR.pdf
Uploaded by : wb9qzb_groups <wb9qzb_groups@...>
Description : High-Speed Data on D-STAR by WB4QDX
You can access this file at the URL:
To learn more about file sharing for your group, please visit:
Regards,
wb9qzb_groups <wb9qzb_groups@...>
|
File - D-STAR 23cm Monthly Announcement.txt
D-STAR_23cm@yahoogroups.com
D-STAR 23cm Ops -
Thanks for participating in the D-STAR 23cm group.
If you're using or experimenting with D-STAR on 23m currently let the group know how you're using D-STAR
by sending a message to the group, adding a Link in the Links area and/or Uploading a File to the Files area.
Messages & articles about how you currently or plan to use the high-speed data capability would be of particualar interest to group memebers.
By the way, there are already dozens of messages in the group's message log and
numerous files & links in the Files & Links areas about all aspects of D-STAR.
Please also let other D-STAR users, including those don't yet use D-STAR on 23cm, who aren't members of the group know about the group.
D-STAR 23cm Group
|
NW Digital Radio UDR Progress Report
----- Forwarded Message -----
k7udr posted: "Hello All,
Basil delivered ?the IQ ADC/DAC driver earlier this month and Dennis has an initial port of the modem completed, so we are moving into RF characterization. Once the transmit chain has been checked out,?I will be working on the PA, RX/TX switch"
Hello All,
Basil delivered ?the IQ ADC/DAC driver earlier this month and Dennis has an initial port of the modem completed, so we are moving into RF characterization. Once the transmit chain has been checked out,?I will be working on the PA, RX/TX switch and thermal characterization while Dennis proceeds with the receive chain.
I have started layout on prototype II. I anticipate a third spin on the prototype before moving to pilot production in China.
We will not accept orders until I have fully functional prototypes in hand and then there is a 8-12 week production cycle.
Best case is orders this year for delivery in late Q1.
The initial deliverable includes:
- 9600 MSK and 4800 GMSK Modems
- Support for AX.25 and D-STAR DV
- Winlink Client/Server
- APRS Tracker/IGate
- D-STAR IrcDDB Gateway
- Hi-Speed Test Mode*
D-STAR Voice using the AMBE add-on card will be released after initial shipments are complete.
*We are not implementing legacy 56k support as there is little installed equipment and our engineering efforts are better spent on faster modes with FEC. The Hi-Speed Test will allow us to prove out our hardware and start gathering channel characterization data.
Full support for Hi-Speed TCP/IP and D-STAR DD will be a free Software Update in Q3 2014.
Thanks to all of you for your patience and support,
Bryan Hoyer, K7UDR
| November 18, 2013 at 4:30 pm | URL:
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Trouble clicking? Copy and paste this URL into your browser:
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Re: Icom D-STAR Infrastructure Program
As of Nov 1 this program has been unexpectedly high, per ICOM, and they are currently 2 months backlogged on the ship date for current.? ICOM is still accepting orders, until 12/21/13, but there is always the possibilty th ey'll terminate the heavily discounted offer early.
Clubs can order 2 complete D-Star Stacks, (Controller w/1.2ghz voice/high speeddata/440cm/2M both with low speed data Repeaters) for $3,699.95 + shipping.
If you're on the fence I'd highly recommend that you take advantage of this iscount program as the last promotional dicount was several years ago.
73
73
---In D-STAR_23cm@..., <wb9qzb_groups@...> wrote: ?
?D-STAR Infrastructure Program?
Icom has seen incredible growth of D-STAR over the past four years! With the release of the ID-51A and
IC-7100, we see more people get on the air with D-STAR. In response to the requests to make the
infrastructure more affordable, Icom America and Icom Canada are teaming up to expand the number of
repeaters across the US and Canada!
For a limited time, this promotion is directly through Icom America Inc. and Icom Canada, and NOT
available through any US or Canadian dealers.
?Model Retail
ID-RP2C 06/RS-RP2 G2 $ 849.95
ID-RP2D 26 $ 599.95
ID-RP2V 26 $ 749.95
ID-RP2000V 26 $ 749.95
ID-RP4000V 26 $ 749.95
?
? Promotion dates: July 22nd - December 31st, 2013
? The pricing shown above is unit price only
? Shipping and applicable taxes apply
? Pricing is valid directly from Icom America Inc. and Icom Canada
? Limit two systems per club
? US & Canadian Customers only?
To take advantage of the D-STAR infrastructure promotion, contact the Icom location for your area.
US Customers contact Icom America, Inc.
Phone: 800-346-0495
Fax: 425-586-6305
Email: parts@...?
Canadian Customers contact Icom Canada
Phone: 604.952.4266
Fax: 604.952.0090
Email: Sales@...??
Vol. 14.07 July 22, 2013
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There are NMO mounts and there are NMO mounts. There are several that are
rated to 6 GHz. I don't have any sophisticated analyzers, but my power meter and
Bird 43 think they are OK.
?
Buddy WB4OMG
?
In a message dated 11/7/2013 2:49:35 P.M. Eastern Standard Time,
ewestgard@... writes:
toggle quoted message
Show quoted text
One of
our folks evaluated the NMO antenna mounting system on 1.2G and said he was
not seeing a good match on his test equipment.?
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To answer the question George posed, the DD mode RP-2D ?is ideal for high speed data.? Think about it as a data satellite.? In our area, some of the best commercial real estate sites have river views- so are low lying.? A DD mode “RP-2D” allows users or databases there to get out across the whole area.? You can use the “RP-2D” as a bent pipe – one to one- or if you put a server behind the repeater, everybody can use it.? So a use case for us is a command truck at ground level needs to reach Red Cross HQ at ground level and the State EOC also at ground level.? A single DD mode module can handle this with ease.? All three sites can access a common application (Citadel, missing persons, D-Rats, etc.).??? We take this one step further and put the databases remote from the repeater site.? So a repeater module is the next thing you want to buy after your first ID-1. ?Also an ID-1 makes a perfectly good voice radio on the gateway.? While armchair experts will debate this, we see similar range on 1.2 DV and 440 FM.? ??One of our folks evaluated the NMO antenna mounting system on 1.2G and said he was not seeing a good match on his test equipment.?
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Re: DD Mode at the Medtronic Twin Cities Marathon 2013
So what's a matter with NMO mounts? About all I've seen is that and UHF mounts for mobile usage.?
Sly n5gqb
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Last I checked the UK was having trouble getting licenses/authorization for 23cm -- but Icom USA was going to continue the product.?
The full repeater is a good idea, but you may have to detune duplexers for the bandwidth (130 khz vs 6.25khz), of course vertical separation shouldn't be that big of a deal on 23cm, eliminating duplexers all together. ?When the UDR56K-4 comes out, you may be able to do a 23cm / 70cm crossband repeater. ---In D-STAR_23cm@..., <w4aqr@...> wrote:
One thing that would spur DD activity is if ICOM
had designed the DD box as a true repeater and not just an access
point.
I have considered adding a second DD box to my
stack and pass the data from one box to the other through a server.
Since our current box operates in the 1250 range we
could easily put another box in the 1297 range and create a true
repeater.
I am not sure it is worth all of the effort just to
get ISDN speeds. There are other less expensive options that are
faster.
?
George - W4AQR
Sent: Tuesday, November 05, 2013 12:13 PM
Subject: Re: [D-STAR_23cm] Re: 23cm D-Star HT
Something
may have been "lost in the translation" (both figuratively and literally).?
"Stopping production", whether temporarily (eg, due to overstock) or
permanently, is not the same as stopping sales (and in a particular geographic
region or country). My guess is that sales of the ID-1 have not been up
to Icom's expectations (for several reasons).? My guess is that they have
significant overstock (hence the recent price reduction on the ID-1). I
own an ID-1, and all my contacts on it have been on FM !? The last one was
a three-way conversation with another ID-1 owner and an IC-9100 owner, on a 23cm
FM repeater some 35 miles away (which I can successfully use at the one watt
setting) !!! There are two closer 23cm DV modules and three 23cm DD
modules, and all have been on the air for years.? One pair suffers from a
VERY poor location, another pair suffers from an untuned duplexer, and the third
DD module is not connected to the Internet (which makes it useless). If
anyone thinks it's frustrating to be in an area with no local 23cm D-Star
modules on the air, it is no less frustrating to have them on the air but
unusable.? Situations like this do not spur the sales of ID-1
radios.
On 2013-11-05 07:37, Mark Thompson wrote:
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Re: DD Mode at the Medtronic Twin Cities Marathon 2013
Antennas are another issue.? For several tears
now we have tried to operate a full-stack system on various Japanese antennas
with poor results.
All of the currently available antennas just does
not stand up to tower top mounting. They eventually break the internal solder
joints or the hardware comes apart. The other big issue we face here in Florida
is lightening. None of the Japanese antennas are DC grounded. Most use coupling
capacitors that blocks any connection to ground not to mention they will not
handle any power due to the caps being undersized for repeater
service.?Remember that the TX power going to the antenna is cumulative when
all of the TX modules in the stack come up together.
The mechanical problems causes noise that manifest
in desense on the receivers.
?
On a commercial tower you are lucky if you get a
years service out of Japanese antenna before needing to change it out. This
results in the cost of another tower climb plus the new antenna cost.? The
ideal situation would be to use separate antennas for each band. That is just
not possible in our case due to the extra wind loading and additional hard line
required.? If you are lucky enough to talk your way onto a good commercial
tower, more than likely the owner is just allowing you one space and feed line.
This necessitates installing one of the TRI-BAND models.
?
We have presented this problem to all of the
current antenna manufactures and none of them seem to be interested in
manufacturing an antenna that will work for us. Most of the Japanese
manufactures say that it is a very narrow market and they can not make
enough? in sales to make it profitable.
?
Out of all the antennas we have gone through we
have found that the Comet GP-95 works the best with some modifications.?
All of the internal capacitors are replaced using short lengths of RG-142 coax
as the cap. The feed is modified to make the antenna DC grounded.? All of
the solder joints and mechanical screws are silver soldered into place. Since
the GP-95 is a one piece radome you do not need to add additional WX protection
at the center joint as needed with the GP-98. You still need flooded heat shrink
at the base to cover the fiberglass to metal joint. One other importaint point
is to support the antenna at the top as well as the bottom to keep it steady in
the wind. This is especially important at 23cm. Antenna movement results in
radiation pattern shift thus causing the signal to fluctiate at the receiving
station.
?
Any comments?
?
George - W4AQR
?
?
????
toggle quoted message
Show quoted text
Sent: Wednesday, November 06, 2013 6:13 AM
Subject: [D-STAR_23cm] DD Mode at the Medtronic Twin Cities Marathon
2013
This year we were back to having six RP-1D /RP-2D systems
online on area rooftops.? We are having a lot of antenna issues- the Comet
GP-95s wobble and the base set screw falls out and they spin and the hardline
either fails or falls off.? ?A fix seems to be to add a hose clamp
over the set screw.? Four sites are now using Linksys WRT-54GL routers and
OLSR software as back ends, and are not on any gateways or the Internet.?
We are using DHCP and small subnets, so any ID-1 that comes in gets an IP
address in a unique subnet and then it is easy to route between ID-1 attached
networks.? ?This provides any to any and one to many for repeater
attached ID-1s.? One of the strengths of the DD mode gear besides high
power is the ability to support multiple concurrent data sessions.?
We get routine 12+ mile (omni-omni) paths from our low lying
data trailer site and remote trucks to our repeaters with minimal packet loss
and 100ms rtd using either base antennas or mobile whips on ground plane
mounts.? ?Two of (our) DD modules are on the USRoot gateway and we
need to experiment with that.? We again ran two ID-1s as uplink radios side
by side to two repeaters from our server trailer to support three ID-1s at the
remote sites.? Note our remote stations had a lot of trouble with
antennas/coax- the quite rare Comet 1.2 SWR bridges would have been useful and
avoid NMO mounts.? ?50% of our voice traffic from 140 hams is digital,
and that will increase in 2014.? ?
?
Erik, NY9D?
?
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Ray Novak (Icom USA) just confirmed the 23cm gear is still in production.?
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DD Mode at the Medtronic Twin Cities Marathon 2013
This year we were back to having six RP-1D /RP-2D systems online on area rooftops.? We are having a lot of antenna issues- the Comet GP-95s wobble and the base set screw falls out and they spin and the hardline either fails or falls off.? ?A fix seems to be to add a hose clamp over the set screw.? Four sites are now using Linksys WRT-54GL routers and OLSR software as back ends, and are not on any gateways or the Internet.? We are using DHCP and small subnets, so any ID-1 that comes in gets an IP address in a unique subnet and then it is easy to route between ID-1 attached networks.? ?This provides any to any and one to many for repeater attached ID-1s.? One of the strengths of the DD mode gear besides high power is the ability to support multiple concurrent data sessions.? We get routine 12+ mile (omni-omni) paths from our low lying data trailer site and remote trucks to our repeaters with minimal packet loss and 100ms rtd using either base antennas or mobile whips on ground plane mounts.? ?Two of (our) DD modules are on the USRoot gateway and we need to experiment with that.? We again ran two ID-1s as uplink radios side by side to two repeaters from our server trailer to support three ID-1s at the remote sites.? Note our remote stations had a lot of trouble with antennas/coax- the quite rare Comet 1.2 SWR bridges would have been useful and avoid NMO mounts.? ?50% of our voice traffic from 140 hams is digital, and that will increase in 2014.? ? ? Erik, NY9D? ?
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I agree, although it shouldn't require a second radio.? There's no
reason that I can think of, that server software couldn't just queue
and echo ("store and forward") incoming (over the air) packets back
over the air, in a similar manner as an Ethernet switch.? An
Ethernet switch normally doesn't send packets back out the
originating port on the switch, but that's just a software
optimization in a normal switch.
On 2013-11-05 12:31, George Jones
wrote:
toggle quoted message
Show quoted text
One thing that would spur DD
activity is if ICOM had designed the DD box as a true repeater
and not just an access point.
I have considered adding a second
DD box to my stack and pass the data from one box to the other
through a server.
Since our current box operates in
the 1250 range we could easily put another box in the 1297
range and create a true repeater.
I am not sure it is worth all of
the effort just to get ISDN speeds. There are other less
expensive options that are faster.
?
George - W4AQR
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John Hays - K7VE / WRJT-215