[App_rpt-users] AllStar Node / repeater radios
Fred Moore
fred at fmeco.com
Thu Sep 24 20:19:17 UTC 2015
is this now a Dstar list, if so stop the world and let me off.. I
thought this was an allstar last.. Fred
On 9/24/15 4:11 PM, Jon Rorke wrote:
> Looks like it might work.
>
> Didnt see any audio specs but it hints it has discriminator and direct
> mod.
>
> RQ
>
> On 9/24/2015 2:48 PM, Skyler F wrote:
>> Will this radio work for Dstar I have this chinese data radio:
>>
>> https://www.argentdata.com/catalog/product_info.php?products_id=107
>>
>> On Thu, Sep 24, 2015 at 12:48 PM, Skyler F <electricity440 at gmail.com
>> <mailto:electricity440 at gmail.com>> wrote:
>>
>> Thanks,
>>
>> So what you are saying is that freestar only allows the DSTAR
>> network if you are coming in from a digital modulation, if the
>> switch is flipped to analog, it disables the network?
>>
>>
>>
>>
>>
>> On Thu, Sep 24, 2015 at 12:26 PM, Ken <ke2n at cs.com> wrote:
>>
>> You can transmit GMSK containing the DSTAR encoding with a
>> cheap sound card. The hard part is finding a radio that
>> passes 1 Hz to about 6 kHz with a fairly flat passband.
>>
>>
>>
>> The freestar folks have a way to toggle operation between
>> analog and digital, if you want (see VA3UV web pages).
>>
>>
>>
>> The “Network” activity is managed by separate linking
>> programs that talk to the repeater software module. If you
>> were in analog mode, the linking programs would not get any
>> data and they would not do anything on the network that
>> linked the DSTAR machine to a reflector or other repeater.
>>
>>
>>
>> So: yes.
>>
>>
>>
>> Regards
>>
>> Ken
>>
>>
>>
>>
>>
>>
>>
>> *From:*Skyler Fennell [mailto:electricity440 at gmail.com]
>> *Sent:* Thursday, September 24, 2015 1:29 PM
>> *To:* Ken <ke2n at cs.com>
>>
>>
>> *Subject:* Re: [App_rpt-users] AllStar Node / repeater radios
>>
>>
>>
>> I should probably move this to a DSTAR/free star group but
>> here is my last question:
>>
>>
>>
>> If I want a radio to transmit digital, I can use software
>> with a cheap sound card. Correct?
>>
>>
>>
>> Is there any way to use a sound card to transmit analog audio
>> while still connected to the DSTAR network?
>>
>>
>>
>>
>>
>>
>>
>>
>> On Sep 24, 2015, at 8:28 AM, Ken <ke2n at cs.com> wrote:
>>
>> This should be on the freestar reflector I think (re:
>> “dstarrepeaterd” program – the “sound card” DSTAR modem)
>>
>>
>>
>> I found that the low-pass filtering in the URI limits the
>> frequency response so that it does not reproduce the
>> baseband signal with enough fidelity to work on DSTAR
>> GMSK. The result is a lot of errors on the DSTAR side.
>> As posted many times on the other reflector, the absolute
>> cheapest sound fob with no filtering seems to work best
>> (but make sure your transmitter has at least some filtering).
>>
>>
>>
>> Having said that, as an experiment, I changed the
>> relevant surface-mount capacitors in one channel, of one
>> of my URIs, and it worked fine on DSTAR.
>>
>>
>>
>> Regards
>>
>>
>>
>> Ken
>>
>> KE2N
>>
>>
>>
>>
>>
>> *From:*Skyler F [mailto:electricity440 at gmail.com]
>> *Sent:* Thursday, September 24, 2015 10:17 AM
>> *To:* app_rpt-users at ohnosec.org
>> *Subject:* Re: [App_rpt-users] AllStar Node / repeater radios
>>
>>
>>
>> Is it possible to use a URIx for freestar yet or do you
>> still need a hardware board for the digital stuff? I know
>> they were working on something for software.
>>
>>
>>
>> On Thu, Sep 24, 2015 at 8:15 AM, Steve Zingman
>> <szingman at msgstor.com> wrote:
>>
>> Digital needs unfiltered receiver and transmitter
>> audio. I've done it with D-STAR and DMR. I have only
>> setup a SM-50 as a user radio.
>>
>> Steve
>>
>>
>>
>> On 9/24/2015 10:05 AM, Skyler F wrote:
>>
>> Well my personal experience with a baofeng node
>> is really good audio reports, and sometimes
>> better than my motorola SM-50 discriminator
>> audio. I just use the internal tone decoder in
>> those baofeng radios for COR.
>>
>>
>>
>> Would they not be suitable for DSTAR though?
>>
>>
>>
>> On Thu, Sep 24, 2015 at 7:41 AM, Steve Zingman
>> <szingman at msgstor.com> wrote:
>>
>>
>>
>> On 9/24/2015 9:30 AM, Skyler Fennell wrote:
>>
>> Can I have an explanation of why
>> discriminator is needed for anything but
>> actual digital modulation like 9600 baud?
>>
>> To prevent PL tones?
>> Nope, when plugging in good headsets I
>> can hear the CTCSS tone from the repeater
>> and even on the baofeng.
>>
>> Lack of high frequency noise?
>> Put a high pass filter
>>
>> Someone please explain why discrim is
>> needed. Good audio is good audio and
>> can't it be manipulated to fit the needs
>> of the application?
>>
>> Maybe I don't want other filters inline, I
>> want total control of the receive audio.
>> de-emphases CTCSS filtering etc.
>>
>>
>>
>> If worried about audio levels, put an AlC
>> which automatically feeds the system
>> (weather Allstar or free star) with the
>> perfect level independent of the level of
>> the user.
>>
>> Please note I'm only talking analog.
>>
>> 73
>> Skyler KD0WHB
>>
>> On Sep 24, 2015, at 7:15 AM, Steve
>> Zingman <szingman at msgstor.com> wrote:
>>
>> Being a DSP based radio, the BF888 is
>> a cheap low power analog only RF
>> package. Given the lack of
>> discriminator and modulator access it
>> is limited.
>>
>> For a receiver the Maxtrac / Radius
>> / GM300 work well. For a transmitter
>> not so much. Heat output and with the
>> Maxtrac, problems with power and
>> deviation control out of band can
>> cause problems without custom
>> firmware or hardware hacks.
>>
>> My absolute favorite RF gear for
>> Analog / Digital repeaters is Tait.
>> The T800 series is a purpose built
>> programmable Exciter / Receiver
>> package. With access to all the
>> signals anyone would want. I started
>> using them for 927 MHz repeaters and
>> have had great performance on UHF and
>> VHF. Mix and match at will. Pair a
>> VHF receiver with a UHF or 900 MHz
>> transmitter for a nice RF linked
>> receiver site. For link radios
>> simplex nodes and "Hot Spots" I've
>> come to favor the Tait T2000 mobiles.
>> They are easy to program, well
>> documented, lots of IO and run cool
>> in transmit.
>>
>> The above is not to say there are not
>> a LOT of great repeater / node
>> packages out there. The GE MASTR II
>> comes to mind. I have to mention the
>> Micor to keep the flack down. ;) I've
>> built repeaters using everything from
>> a Motorola 30D to current equipment.
>>
>> Your mileage may vary.
>>
>> 73, Steve N4IRS
>>
>> --
>> ,,,
>> (o o)
>> -----ooO-(_)-Ooo------
>> --- N4IRS was Here ---
>>
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>>
>>
>>
>>
>>
>>
>> --
>>
>> Skyler Fennell
>>
>> amsatnet.info <http://amsatnet.info>
>>
>> KDØWHB
>>
>> electricity440 at gmail.com
>> <mailto:electricity440 at gmail.com>
>>
>>
>>
>>
>>
>>
>>
>> --
>>
>> Skyler Fennell
>>
>> amsatnet.info <http://amsatnet.info>
>>
>> KDØWHB
>>
>> electricity440 at gmail.com <mailto:electricity440 at gmail.com>
>>
>>
>>
>>
>> --
>> Skyler Fennell
>> amsatnet.info <http://amsatnet.info>
>> KDØWHB
>> electricity440 at gmail.com <mailto:electricity440 at gmail.com>
>>
>>
>>
>>
>> --
>> Skyler Fennell
>> amsatnet.info <http://amsatnet.info>
>> KDØWHB
>> electricity440 at gmail.com
>>
>>
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>
>
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--
Fred Moore
email: fred at fmeco.com
fred at safes.com
phone: 321-217-8699
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