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Search found 609 matches

by Astro Spectra
Tue Mar 12, 2019 12:30 pm
Forum: MotoTRBO Portables and Mobiles (3xxx/5xxx/7xxx/SL) 2.0 Series Subscribers
Topic: XPR 7550E audio mutes RX
Replies: 1
Views: 120

Re: XPR 7550E audio mutes RX

The FPP feature may not allow access to all DMR channel settings. Color code, timeslots, talkgroup, RX frequency, tx freq, admit criteria, all need to be set. I've not used FPP on Mototrbo so I don't know for sure. The programming software will allow you to see the channels settings in the zone that...
by Astro Spectra
Sat Feb 23, 2019 10:22 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Any idead how far a 10 watt lsb radio would tx ?
Replies: 5
Views: 927

Re: Any idead how far a 10 watt lsb radio would tx ?

One Spilsbury SBX-11A in orange: https://www.pwnhc.ca/wp-content/uploads/2017/12/2016.9.1.jpg Also available in green. These were often used in Antarctica by field parties with the antenna just laid out on the ice. Made in Canada, eh. And the brochure: http://arec.info/wp-content/uploads/2019/02/sbx...
by Astro Spectra
Thu Feb 21, 2019 3:11 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Any idead how far a 10 watt lsb radio would tx ?
Replies: 5
Views: 927

Re: Any idead how far a 10 watt lsb radio would tx ?

I have talked over 500 miles on similar equipment and frequencies with the antenna (a wire half wave dipole) just stretched over bushes 6' above ground. 4MHz is good usually late evenings. Day time might be just 100 miles depending on ionosphere conditions. Coax at that frequency doesn't matter much...
by Astro Spectra
Thu Feb 21, 2019 3:08 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Any idead how far a 10 watt lsb radio would tx ?
Replies: 5
Views: 927

Re: Any idead how far a 10 watt lsb radio would tx ?

I have talked over 500 miles on similar equipment and frequencies with the antenna (a wire half wave dipole) just stretched over bushes 6' above ground. 4MHz is good usually late evenings.
by Astro Spectra
Thu Feb 21, 2019 3:04 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: 3rd World LMR Equip VHF
Replies: 4
Views: 871

Re: 3rd World LMR Equip VHF

Like most places, countries in the Caribbean have type approval and licensing requirements. It is best to see what gear is already approved and choose the same model to help minimise border issues. While using ham gear may avoid the type acceptance issue it may then give you more complex licence req...
by Astro Spectra
Thu Jan 24, 2019 12:02 pm
Forum: MotoTRBO Repeaters, Trunking, and Site Infrastructure
Topic: XPR 8400 CWID Problem
Replies: 4
Views: 180

Re: XPR 8400 CWID Problem

Good to know, thank you.
by Astro Spectra
Tue Jan 22, 2019 12:52 pm
Forum: MotoTRBO Repeaters, Trunking, and Site Infrastructure
Topic: XPR 8400 CWID Problem
Replies: 4
Views: 180

Re: XPR 8400 CWID Problem

Similar bug reported in the latest SLR firmware release notes but nothing on the XPR.
by Astro Spectra
Mon Dec 24, 2018 11:08 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Cat5 Cable Noise on Tower
Replies: 6
Views: 255

Re: Cat5 Cable Noise on Tower

There have been a few threads on this in the past here. First thing to do is have all the cable runs replaced with top quality outdoorcrated shielded Cat 5/6 cable. Like the Tough Cable from Ubiquity. You can explain to the WISP that it's better for them (reduces chances of induced lightning damage ...
by Astro Spectra
Sat Dec 01, 2018 10:54 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Quantar Linking 2m/440 & external controller
Replies: 3
Views: 158

Re: Quantar Linking 2m/440 & external controller

Why bother with analog? Digital only is much easier and better.
by Astro Spectra
Thu Nov 15, 2018 11:35 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Frankenstein Quantar?
Replies: 2
Views: 842

Re: Frankenstein Quantar?

That's how it's done.

You can even alter the ranges of the RF modules see W9CR's excellent site:

http://wiki.w9cr.net/index.php/Quantar
by Astro Spectra
Mon Aug 27, 2018 11:59 am
Forum: Vehicle Radio Installs
Topic: Fighting Noise In A 2018 Honda CR-V
Replies: 6
Views: 805

Re: Fighting Noise In A 2018 Honda CR-V

If you did something and the noise went away you need to retrace your steps to discover what changed.

Also a firend found clip on chokes over the injector leads very helpful in fixing his interference issues.
by Astro Spectra
Mon Feb 12, 2018 10:53 am
Forum: MotoTRBO Repeaters, Trunking, and Site Infrastructure
Topic: Help Please - XPR8400 Questions About Mixed Mode
Replies: 5
Views: 838

Re: Help Please - XPR8400 Questions About Mixed Mode

Actually AFAIK with dynamic mixed mode IPSC is not supported but RDAC still works.

EDIT: I bought a dynamic mixed mode EID and it was a disappointment, for the money it did not allow IPSC networking.
by Astro Spectra
Fri Feb 09, 2018 10:13 pm
Forum: MotoTRBO Repeaters, Trunking, and Site Infrastructure
Topic: Help Please - XPR8400 Questions About Mixed Mode
Replies: 5
Views: 838

Re: Help Please - XPR8400 Questions About Mixed Mode

If you plan to network the DMR forget mixed mode.

A work around is to program up two channels, one analog and one digital, and switch it either suing a hard wire to the ACC connector or by using RDAC.
by Astro Spectra
Mon Jan 15, 2018 1:12 pm
Forum: MotoTRBO Repeaters, Trunking, and Site Infrastructure
Topic: Trbo rptr receive threashold chatter
Replies: 5
Views: 1065

Re: Trbo rptr receive threashold chatter

I set the threshold to -45dBm (as high as it will go) because the protection mechanism is wrong. You're supposed to listen before transmission to avoid co-channel but in a two frequency system the repeater receiver is not listening to the transmitter frequency (and can't because of the duplexer) so ...
by Astro Spectra
Mon Jan 08, 2018 8:05 pm
Forum: MotoTRBO Portables and Mobiles (4xxx/6xxx) 1.0 Series Subscribers
Topic: XPR 6550 Multiple Scan Lists
Replies: 2
Views: 749

Re: XPR 6550 Multiple Scan Lists

In other words the scan lists are slaved to a mode.
by Astro Spectra
Mon Jan 01, 2018 8:59 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra 146-174 110w capacitors
Replies: 21
Views: 2654

Re: Spectra 146-174 110w capacitors

My experience is that only a careful visual inspection will tell you if you definitely need to do replacement. Note that the converse is not true, visual inspection will not show you if you don't need replacement.
by Astro Spectra
Mon Jan 01, 2018 8:55 pm
Forum: ASTRO25 Series (XTS/XTL 1500/2500/5000) Subscribers
Topic: XTL5000 P25 and wideband FM (5kHz) and other questions...
Replies: 14
Views: 1808

Re: XTL5000 P25 and wideband FM (5kHz) and other questions...

Gentlemen, it's pretty simple: If you don't have Q507 then there is no restriction. If you do have Q507 and modern firmware then the radio is restricted to 12.5 kHz on frequencies that align to Part 90 (tested on VHF). Even with Q507 and modern firmware, non Part 90 freqs (such as those used by the ...
by Astro Spectra
Fri Dec 29, 2017 12:47 pm
Forum: ASTRO25 Series (XTS/XTL 1500/2500/5000) Subscribers
Topic: First Digital radio question ?
Replies: 4
Views: 1046

Re: First Digital radio question ?

Have to admit same deal here, picked up a Whistler TRX-2 simply to assist with setting up radios. Recently did an DMR repeater install for an organization at a site, they then asked for help in coverage tests while we were on they way down from the mountain. However, customer did not know how their ...
by Astro Spectra
Thu Dec 28, 2017 2:12 pm
Forum: ASTRO25 Series (XTS/XTL 1500/2500/5000) Subscribers
Topic: First Digital radio question ?
Replies: 4
Views: 1046

Re: First Digital radio question ?

Bill_G wrote:I just bought a scanner that does v.kitchensink protocols....


Shiowing your age Bill, these days it would be #kitchensink ... blurp errr bleep shhhhhh

For those too young to remember or for a nostalgia hit visit:

https://www.dialupsound.com/

With the sound on :)
by Astro Spectra
Thu Dec 28, 2017 1:06 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Impres multi unit charger conversion question
Replies: 1
Views: 690

Re: Impres multi unit charger conversion question

As a field expedient I've used folded cardboard and a handkerchief. While the MUC is handy it's, as you say, too expensive for conversion of more than a pocket or two.

As for a wholesale remplacement the only option I could suggest is 3D printed MUC work alike from a maker bot specialist.
by Astro Spectra
Fri Dec 15, 2017 12:30 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Syntor X Low Band Wide Band Antenna Coils
Replies: 4
Views: 869

Re: Syntor X Low Band Wide Band Antenna Coils

Looking at the design in your second picture it's rather like the circuit used for two frequency low band short whip operation published in one of the old ARRL handbooks.
by Astro Spectra
Fri Dec 15, 2017 12:24 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: AMTS 217 band reallocation issues
Replies: 11
Views: 1244

Re: AMTS 217 band reallocation issues

Hi Bill, interested in your observations can you post more? Are the medical devices Part 15? The 'interferers' Part 80?
by Astro Spectra
Fri Dec 08, 2017 1:28 pm
Forum: MotoTRBO Portables and Mobiles (3xxx/5xxx/7xxx/SL) 2.0 Series Subscribers
Topic: XPR7550 RF adapter
Replies: 17
Views: 1867

Re: XPR7550 RF adapter

3.4mm OD on the socket.
by Astro Spectra
Fri Dec 08, 2017 11:47 am
Forum: MotoTRBO Portables and Mobiles (3xxx/5xxx/7xxx/SL) 2.0 Series Subscribers
Topic: XPR7550 RF adapter
Replies: 17
Views: 1867

Re: XPR7550 RF adapter

I think it's possible that the coax insert used in DIN41612 connectors might just fit. On the left here: https://encrypted-tbn3.gstatic.com/images?q=tbn:ANd9GcQ0O-_VnxWIi_UjP-ITYeVjPEEELqqSZrqBoAS65yi7JQw_BCoGVnsko9UK The ID of the inner bifurcated section is 4.2mm. But could be gently squeezed tigh...
by Astro Spectra
Mon Dec 04, 2017 12:16 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: VHF Quantar Duplexer 600KHz?
Replies: 7
Views: 1094

Re: VHF Quantar Duplexer 600KHz?

There is a notch set by the a small tuning cap but from memory it's shallow at only 30 to 40 dB at the narrow splits, deeper at the wide splits. Because the main elements are electrically shortened the notch performance is not great.
by Astro Spectra
Sat Dec 02, 2017 9:54 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: VHF Quantar Duplexer 600KHz?
Replies: 7
Views: 1094

Re: VHF Quantar Duplexer 600kHz?

Hi escomm, that set of cans has a minimum t to r split of about 1.2 MHz. It's a bandpass-bandpass design. At the narrowest spacing the pass band is about 100 kHz aside , meaning the width of the high and low pass bands. It's not big enough really for the ham split, you need something with 'more can'...
by Astro Spectra
Sat Dec 02, 2017 9:41 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: GTR 8000 Feature Update & New Voting Comparator!
Replies: 22
Views: 3812

Re: GTR 8000 Feature Update & New Voting Comparator!

I've been told the front port is special as there is a DHCP server running to support connection of laptops w/o the need for a fixed address.

Also your comments re RT-RT mode, I expect you mentioned to say "without an AstroTAC"?
by Astro Spectra
Tue Nov 28, 2017 12:46 am
Forum: MotoTRBO Repeaters, Trunking, and Site Infrastructure
Topic: SLR5700 repeaters with IP switch
Replies: 3
Views: 870

Re: SLR5700 repeaters with IP switch

Why do you think it's not IPSC?
by Astro Spectra
Sun Nov 19, 2017 5:13 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra Astro, duel radio option?
Replies: 14
Views: 4056

Re: Spectra Astro, duel radio option?

escomm wrote:Yes, it uses a special W3 HHCH and is well-discussed here. Feel free to search


As per escomm's response, it can only be done with W3 HHCH and special software and some cables. Basically it's a no.
by Astro Spectra
Thu Nov 16, 2017 10:50 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Spectra Astro, duel radio option?
Replies: 14
Views: 4056

Re: Spectra Astro, duel radio option?

Yes, I often find my Astro units having a go at each other:

Image
by Astro Spectra
Thu Nov 02, 2017 9:55 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: XPR and Beach Problems
Replies: 12
Views: 1356

Re: XPR and Beach Problems

If A/C is not an option then passive measures like sun shields might work. These are usually stainless steel sheets spaced an inch and a half away from the outside surfaces of the cabinet. These reflect the sun and promote convection drafts. Here's an example: https://www.delvallebox.com/en/outdoor-...
by Astro Spectra
Tue Oct 31, 2017 7:20 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: XPR and Beach Problems
Replies: 12
Views: 1356

Re: XPR and Beach Problems

Sheesh, in Arizona even traffic light controllers get A/C.
by Astro Spectra
Mon Oct 30, 2017 11:12 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: XPR and Beach Problems
Replies: 12
Views: 1356

Re: XPR and Beach Problems

com501 wrote:...install a heat-exchange HVAC ... The cabinet was airtight.


+1 Only solution for coastal installs.
by Astro Spectra
Sat Oct 14, 2017 10:12 am
Forum: MotoTRBO Repeaters, Trunking, and Site Infrastructure
Topic: SLR8000 Status led solid red
Replies: 2
Views: 750

Re: SLR8000 Status led solid red

Just speculation but if it was trying to actually transmit on 136 MHz into a frequency selective combiner or duplexer then the PA probably got very upset with the high reverse power. RDAC is strange, it doesn't read logs from machines unless asked to. Generally with logs the first fault is usually w...
by Astro Spectra
Sat Oct 14, 2017 10:05 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: SLR Repeaters
Replies: 7
Views: 1154

Re: SLR Repeaters

I believe so but the experience I have is in DMR where the only interface used is Ethernet. The BSM is here, the AUX connector starts on page 71: https://www.google.co.nz/url?sa=t&source=web&rct=j&url=http://manuals.repeater-builder.com/mo-files2/-SLR%2520Series/SLR5700%2520Basic%2520Ser...
by Astro Spectra
Fri Oct 13, 2017 9:04 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: SLR Repeaters
Replies: 7
Views: 1154

Re: SLR Repeaters

I have a dozen or so '5700 both VHF and UHF to look after, what do you want to know?
by Astro Spectra
Wed Oct 11, 2017 12:32 pm
Forum: ASTRO Experimental - How to do things a little out of the box
Topic: Half-baked: remote control head over Ethernet?
Replies: 14
Views: 5907

Re: Half-baked: remote control head over Ethernet?

Well CNA bus is multi-drop at 1 Mbps over a single twisted pair so unfortunately you do need to interpret the protocol otherwise you don't know if you should be receiving or transmitting. There are commercial CAN bus over Ethernet products like this: http://www.systec-electronic.com/en/products/indu...
by Astro Spectra
Wed Oct 11, 2017 11:45 am
Forum: ASTRO Experimental - How to do things a little out of the box
Topic: Half-baked: remote control head over Ethernet?
Replies: 14
Views: 5907

Re: Half-baked: remote control head over Ethernet?

Major gotchas? Well for the XTL and later radios the audio between the head and body is digital, it's embedded in the CAN bus frames. The CAN bus is only available on the circular blue J300 CAN connectors. There are two so heads can be daisy chained. Motorola makes a 115' extension HKN6165 and I bel...
by Astro Spectra
Tue Sep 05, 2017 11:56 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Coax recommendation portable UHF base station
Replies: 5
Views: 1317

Re: Coax recommendation portable UHF base station

Mechanical ruggedness is much more important than loss for a portable set up. Everything is going to get banged and slammed, so a solid cable is critical. I'd use RG-213. The X30 is not super rugged but OK. I've used them for transportable systems but they're quite narrow band. I had to use a networ...
by Astro Spectra
Tue Sep 05, 2017 11:34 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Low band CDM - why do you need 3 radios to cover from 30 - 50MHz?
Replies: 23
Views: 3418

Re: Low band CDM - why do you need 3 radios to cover from 30 - 50MHz?

+1 on the TK-690H, I have one on 6m sharing a control head with a 890. Solid 100W mobile. I can also recommend the TK-6110. At 70W it's lower power but you can cover 10m and 6m (with modifications) in one radio and it's a heck of a lot smaller than a low band Syntor.
by Astro Spectra
Tue Sep 05, 2017 11:30 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Optimum frequency for maximum mobile direct simplex coverage?
Replies: 15
Views: 1507

Re: Optimum frequency for maximum mobile direct simplex coverage?

XTL2500 with up/down converter based on Syntor for 10m and 6m, the HF up/down converter is home brew but uses the relatively exotic TN-612 AN/TRC-179 Regency Net HF pre/post selector. The other end of the 80m link was made with a Codan HF radio and a HP signal generator.
by Astro Spectra
Mon Sep 04, 2017 8:31 am
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Quantro info
Replies: 7
Views: 1320

Re: Quantro info

There is a picture of the inside of the 800 MHz IPA here on eBay:

Image

Don't know how long the link to that image will last.
by Astro Spectra
Sun Sep 03, 2017 3:13 pm
Forum: Base Stations, Repeaters, General Infrastructure
Topic: Typical Exciter Output for Base Station and Repeaters
Replies: 4
Views: 1056

Re: Typical Exciter Output for Base Station and Repeaters

There is a RF amp hybrid in the Quantro IPA. AFAIK it's the same hybrid as the regular IPA and so delivers up to 10W.
by Astro Spectra
Fri Aug 25, 2017 2:31 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Low band CDM - why do you need 3 radios to cover from 30 - 50MHz?
Replies: 23
Views: 3418

Re: Low band CDM - why do you need 3 radios to cover from 30 - 50MHz?

It's volume driven; in very high volume manufacturing it doesn't matter having multiple variants.

Mil radios are completely different, a 30 to 88 MHZ CNR even without ECCM costs 10x to 40x times a commercial radio price.
by Astro Spectra
Fri Aug 25, 2017 2:13 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Modifying Low Band CDM1550 onto 10m 29 MHz
Replies: 9
Views: 1398

Re: Modifying Low Band CDM1550 onto 10m 29 MHz

...what should I do with a 10m CDM which I only need to program 200 - 300KHz out of band? I only use my radio above 29 MHz on a couple of frequencies so it didn't need anything special other than a routine alignment. What I said, 29 MHz and up performed perfectly with nothing other than a routine a...
by Astro Spectra
Fri Aug 25, 2017 2:09 pm
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Low band CDM - why do you need 3 radios to cover from 30 - 50MHz?
Replies: 23
Views: 3418

Re: Low band CDM - why do you need 3 radios to cover from 30 - 50MHz?

Let's look at the tuning ranges 38/136 = 28%, 67/402 = 16%, 6.3/29.6 = 21% so the low band coverage doesn't look out of line to me.

To cover wide percentage frequency ranges takes a lot of design effort. If you want a commercial Motorola radio that does 10M and 6M get a Syntor.
by Astro Spectra
Fri Aug 25, 2017 1:04 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Optimum frequency for maximum mobile direct simplex coverage?
Replies: 15
Views: 1507

Re: Optimum frequency for maximum mobile direct simplex coverage?

In mixed urban and rural I find 100W P25 into a quarter wave in the centre of the roof delivers superb simplex comms. I'm a fan of 10m but even at 100W it's not panacea. I have access to 70 MHz (I'm outside the USA) but that's limited to 25W and I find the noise limits what you can do there. I've te...
by Astro Spectra
Fri Aug 25, 2017 12:55 am
Forum: General Motorola Solutions & Legacy Radio Discussion
Topic: Modifying Low Band CDM1550 onto 10m 29 MHz
Replies: 9
Views: 1398

Re: Modifying Low Band CDM1550 onto 10m 29 MHz

The shift key thing doesn't work AFAIK but the superb web site of Bryan W9CR sets out what you need: http://wiki.w9cr.net/index.php/Waris I used the old CP tool and a hex editor because ... I'm old. The recommended way today is to use the Chirp application. I only use my radio above 29 MHz on a coup...
by Astro Spectra
Wed Aug 16, 2017 2:20 pm
Forum: Test Equipment & RF Equipment Alignment
Topic: "Portable" spectrum analyzer for filter work?
Replies: 10
Views: 1465

Re: "Portable" spectrum analyzer for filter work?

I've only played with one and I was very impressed for the price. It look nicer and the specs are slightly better than the Rigol.

My own machines are the old HP8713 and HP8566. They don't go to site.

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