Re: Regulator - 12vdc to 5vdc for Raspberry Pi
I'm using this one in my 24/7 Winlink gateway, and it's been doing fine for a couple of months now.? I gave it a weeklong full load (4A) bench test before putting it online.
ed, k9ew
On Mon, Jan 4, 2021 at 3:20 PM jeremy_georges via <jeremy_georges= [email protected]> wrote: Folks,
Any luck on a specific regulator to power a Raspberry PI for an Allstar, Echolink, etc controller? Ideally something with minimal RF noise since these are all switchers/buck type regulators. I could build something...but at this point I would just rather buy an off the shelf product with the integrated micro-USB adapter already in place.
There are some listed on Amazon with mixed reviews. But thought I'd ask the group to see if you've had any real world experience with any of these.
Thanks
-J
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Re: Regulator - 12vdc to 5vdc for Raspberry Pi
Look on the hamvoip forum on groups io. There are some recommended there.?
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On Jan 4, 2021, at 3:20 PM, jeremy_georges via groups.io <jeremy_georges@...> wrote:
?Folks,
Any luck on a specific regulator to power a Raspberry PI for an Allstar, Echolink, etc controller? Ideally something with minimal RF noise since these are all switchers/buck type regulators. I could build something...but at this point I would just rather buy an off the shelf product with the integrated micro-USB adapter already in place.
There are some listed on Amazon with mixed reviews. But thought I'd ask the group to see if you've had any real world experience with any of these.
Thanks
-J
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Regulator - 12vdc to 5vdc for Raspberry Pi
Folks,
Any luck on a specific regulator to power a Raspberry PI for an Allstar, Echolink, etc controller? Ideally something with minimal RF noise since these are all switchers/buck type regulators. I could build something...but at this point I would just rather buy an off the shelf product with the integrated micro-USB adapter already in place.
There are some listed on Amazon with mixed reviews. But thought I'd ask the group to see if you've had any real world experience with any of these.
Thanks
-J
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When you add personalities, don't forget the bottom Zone/Channel Assignment item of the dropdown tree. Therein, you must define at least one zone and add its channel members. You'll see a list with only one entry at present. Right click and use "Add to End" for each channel to be added. Then at the right column, select the Personality # matching the desired channel for each row. Save and program.
73, Matt W6XC
On Mon, Jan 4, 2021 at 12:11 PM KA0TAO Larry via <lrochs2013= [email protected]> wrote: When programming the cdm1250, I can not get it to recognize the channels, it stays on the first one. I am sure I am missing a little step. it keeps showing zone 1. However the read out says GRMS. Thanks for the help. Larry KA0TAO
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When programming the cdm1250, I can not get it to recognize the channels, it stays on the first one. I am sure I am missing a little step. it keeps showing zone 1. However the read out says GRMS. Thanks for the help. Larry KA0TAO
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There is a flavor of DMR trunking that has a control channel - Motorola Connect Plus which uses a 3600 control channel that sounds very similar to a legacy SmartNet or SmartZone 3600 control channel when you listen to it on an analog receiver. ? Capacity Plus DMR trunking is more like LTR.? You can link Capacity Plus sites together to form a wide area system.? Then it becomes Capacity Plus Linked. ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Dan Woodie
Sent: Friday, January 01, 2021 18:32
To: [email protected]
Subject: Re: [repeater-builder] Trunking ? Aside from DMR and LTR trunking you also have one transmit frequency that is always tied up with control channel
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Re: Anybody have schematics or notes on MTR2000 power supply fixes?
Those foreign power supplies are a nightmare, and hardly worth it unless it¡¯s only a fuse or something simple. You can always run it on 24-28vdc and it¡¯ll probably last longer. I¡¯ve put a number of them on the Meanwell DIN rail DC PSupplies after the AC power supply fails and they¡¯ve been working for years now. Just FYI. Good Luck. VR
Rick Kk4b ? ? ? ? ?
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From: [email protected] < [email protected]> On Behalf Of Paul Metzger - K6EH Sent: Monday, January 04, 2021 9:23 AM To: [email protected]Subject: Re: [repeater-builder] Anybody have schematics or notes on MTR2000 power supply fixes? ? The most common failure to these supplies was simply two fuses and two varistors (the two blue discs right near the two fuses). It's pretty much a MUST to have some sort of AC surge protecting device on an MTR2000. Outside of that, they are work horses. Sorry, don't have a schematic for you.
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You are close. There is a DTMF command that will activate the RS-232 connection:
"Remote Activation Of The RS-232 Port
To activate the RS-232 port, key-up and enter the control operator prefix code
followed by [97].? Un-key and the CAT-1000B will automatically switch to the computer
terminal programming mode.? This RS-232 port is configured for a baud rate of 4800."
What I'm not sure about is if sending it again will take it out of programming mode or if it will time out and come out on it's own.
The other thing I am curious about, once the controller programmed, is there that much that you really need to keep doing a full programming for??? You can make changes by DTMF commands.
Mick - W7CAT
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----- Original Message ----- From: Joe To: [email protected]Sent: Monday, January 04, 2021 07:59:42 AM Subject: Re: [repeater-builder] CAT1000 comms This may not work on the CAT1000. I believe that you need to turn the
CT1000 off, operate DIP switch 8, then turn the CAT1000 back on the
activate the RS232 connection.
Joe
On 1/4/2021 6:10 AM, SRG wrote:
Have you tried doing a packet RF link to the controller? Just a thought if the site is far away.
--
Regards, Karl Shoemaker
-- Untitled Document
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On 12/31/2020 1:28 AM, Dan Woodie wrote: Unfortunately until the FCC changes the rules and eliminates the
requirements that hams both positively control their transmit
frequency and monitor before transmitting Trunking is not a legal
option for ham radio in the US.? These days so many repeaters
(including my own) sit idle much of the time so there is no real need. So all the D-STAR, DMR, PL decode FM, and similar have mic hook switches to monitor the frequency before transmit??? (I think not). Just as an example: DMR transmits to get an admit tone long before an FCC ID is sent. Likewise, an FM, P.25, whatever signal would not be decoded. Unless you happen to notice *and trust* the S-meter, you have no indication the frequency is in usage. Reality is that while you might be right in the most rigorous interpretation of the regs, the FCC get's a bit impatient with this type of gnat's hair splitting. We are our own worst enemy. (Which I have heard from both FCC and NTIA officials over the years). HF Ex: NTIA guy told us in a sidebar at a conference that the craziness regarding 60m regs was not them, it was ARRL and other ham orgs. As long as we have a clean signal inside the SSB bandwidth, they don't care. Likewise said they would happily allocate more 60m freqs, but no one is asking. Have fun, Alan KM4BA
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This may not work on the CAT1000. I believe that you need to turn the CT1000 off, operate DIP switch 8, then turn the CAT1000 back on the activate the RS232 connection.
Joe
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On 1/4/2021 6:10 AM, SRG wrote: Have you tried doing a packet RF link to the controller? Just a thought if the site is far away.
--
Regards, Karl Shoemaker
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Re: Anybody have schematics or notes on MTR2000 power supply fixes?
The most common failure to these supplies was simply two fuses and two varistors (the two blue discs right near the two fuses).
It's pretty much a MUST to have some sort of AC surge protecting device on an MTR2000. Outside of that, they are work horses.
Sorry, don't have a schematic for you.
k6EH
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Have you tried doing a packet RF link to the controller? Just a thought if the site is far away.
--
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
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Re: Anybody have schematics or notes on MTR2000 power supply fixes?
Mike,
Hey ...it's really good to see you back on here posting again.
I have one of these power supplies that I starting digging into also.
It's been a while since we talked on the phone but if you still have the same number I will give you a call in the next day or so or if you still have my number give me a call when you have a chance.
I have the field manual for the UHF MTR2000's. Lots of good stuff in it, but there is no detailed service info or schematic's..
Joe - WA7JAW
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You could put a block converter in front of the VHF receiver.
Many years ago I heard of a voting system that used a number of VHF to UHF crossband repeaters as satellite receive sites. They all talked back to a hub location.? At that location they used a single UHF receive antenna feeding a preamp and a Down East Microwave block converter.? It converted from 420-430 MHz to something like 40-42 MHz or 42-43 MHz.? The converter fed a restive multicoupler that fed a number of low band Maxtracs and those fed the voting panel audio inputs.? I forget the frequency range, but i do remember that the multicoupler had something like 14 db of insertion loss...?? The reasoning behind this configuration was that back then 420 range radios were rare, but 36-42 Maxtracs and Radius were readily available and cheap...
I have no idea if Down East (or any other company) is still making block converters, but if so that would scratch your itch.
Mike WA6ILQ
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Anybody have schematics or notes on MTR2000 power supply fixes?
I have two 100w UHF MTR2000s that are perfectly good but
the AC side of the power supplies are dead.... they work fine
with a 24 or 28v DC supply of adequate current...
But I'd like to get the AC side working again.
Moto does not offer tech manuals or schematics for these units...
I'm hoping that someone has done some reverse engineering
on them and will share.
Mike WA6ILQ
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If you have VOIP then you have IP available. Ignore the modem.?
Just like trying to use a fax machine on VOIP it will always be flaky.
Put a Terminal Server on the RS232 port.?? I use the Lantronix units from ebay.?
Look for the UDS100 models, they are 12 volts DC and are full duplex (there
are a number of others that are half duplex and can drop characters).
Map it to port 2000 (seems to be the default for async, at least on the Cisco routers I use).
Mike WA6ILQ
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Re: FM Mode Configuration ?
Hi,
There are many parameters which have affect to the transmitted FM audio level.?
My procedure to set the primary level is this:? ? 1. TxLevel is set to 84 in the configuration file 2. With the trimmers on the RB STM32 DVM the DMR signal deviation is adjusted to Bessel-Null 3. TxLevel is backed down to 80 to achieve the correct 2.75 kHz deviation
John, I see you are using different set of the FM-parameters than I. A good source for the parameters is OpenDV group and it's Search field. For example the parameter UseCOS has gone, see /g/OpenDV/message/530?p=,,,20,0,0,0::relevance,,accessmode,20,2,0,75480795
Yes, I have discovered too there is some low level noise and hiss on the FM audio backround, the the transmitted voice comes still clear enough.
Measurement and final tuning of the FM mode and the CTCSS deviation are next on my list.
73 de Veijo OH4VA ?
On Sat, Jan 2, 2021 at 6:55 AM Richard Aubin < ve2dje@...> wrote: I am using RFAudioBoost = 3 on my 2 repeaters. I adjust TX as follow With MMDVMCAl set for DMR. I adjust software level to 50 and adjust TX pot for carrier null. Put DMRTxLevel to 43 in MMDVM.ini With Rx level pot just under Clip level using Clip Led? I adjust FMTXLevel with MMDVMCAL Select F key repeating F key until? cal level indicates 4 khz dev for 20 khz bandwidth channel.
And adjust MMDVMCAL t or shift t to increase tx level to get 4 khz deviation . Copy the setting to Mmdvm.ini. I use a setting of about 80 with my repeaters. Adjust CTCSSLevel for 600 hz in mmdvm.ini. I use a setting of abt 6 on my repeater.
Richard VE2DJE
Le ven. 1 janv. 2021 8 h 29 p.m., John Brent - VA7WPN < john.brent@...> a ¨¦crit?: Thank you,
This is the config that I have been using.
[FM]
Enable=1
Callsign=VA7PRR
CallsignSpeed=20
#CallsignFrequency=1000
CallsignFrequency=880
CallsignTime=10
CallsignHoldoff=0
CallsignHighLevel=50
CallsignLowLevel=20
CallsignAtStart=1
CallsignAtEnd=0
CallsignAtLatch=0
RFAck=K
ExtAck=N
AckSpeed=20
#AckFrequency=1750
AckFrequency=880
AckMinTime=4
AckDelay=1000
AckLevel=50
Timeout=180
TimeoutLevel=80
CTCSSFrequency=100.0
CTCSSThreshold=30
#CTCSSLevel=20
CTCSSLevel=5
KerchunkTime=0
HangTime=7
UseCOS=1
COSInvert=0
RFAudioBoost=1
MaxDevLevel=90
ExtAudioBoost=1
?
But I have a question about the :
RFAudioBoost=1
UseCOS=1
The TX Audio seems a Little low when I listen for the CW Callsign, and I'm also getting quite a bit of hiss on the signal too, would that have to do with the COS? I'm using the V3 board myself, and a pair of CDM1250 radios. The COS is not used at this time, I'm sure I have some fine-tuning to do.
John Brent
?VA7WPN
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In regard to the Case #2 argument, I agree with Joe.? If a user IDs at the end of 10 minutes, it doesn't matter to the FCC if it gets repeated or not - YOU are ID-ing for YOUR station on the frequency you are operating on. Same as if someone "doubled" with your ID transmission. Requirement satisfied.
Now, with regard to trunking, the system selects the frequency each time you let-up, so unless the radio transmits your callsign with EACH TRANSMISSION, you can't comply with the 10 minute requirement.? I have a trunked HT that I use on my county's system, and when I first power it up, I transmits 4 or 5 times as it "acquires permission" to operate on the system.? Who knows what frequency/frequencies it uses when doing that, and I might not need to call in right away...
Now, back to conventional repeater systems -- along these lines, if your radio is equipped with something like MDC1200 that squawks your *full* callsign every time you un-key, is the 10-minute ID requirement satisfied, or do you need to vocally ID as well?
Mark - N9WYS?
Please excuse all typos... Fat fingers and hyperactive spell check at work!
On Fri, Jan 1, 2021 at 8:55, Joe M. <mch@...> wrote: Isn't the same true of EVERY repeater?
That said, the control op is not responsible for "ensuring"
the ID of the user radios - only the repeater(s).
If you are using a repeater, YOU are responsible for your IDing.
You made a lot of good points, but ended it with a bad argument.
Case in point: If you drive through a valley out of the repeater range,
and you ID your transmitter at 9 minutes, that satisfies the legal
requirements EVEN THOUGH that ID never came through the repeater.
Case #2: IF you are using a repeater that has CTCSS access, and you ID
yourself without CTCSS, you satisfied your legal obligations to ID even
though the control op of the repeater never heard it.
Joe M.
On 1/1/2021 9:38 AM, nd5y via groups.io wrote:
>
> The control operator (end user) of a trunked radio cannot comply with
> the station identification requirements in 97.119(a) because there is no
> way to ensure that you ID every 10 minutes or at the end of every
> transmission on each frequency that is used.
>
> Tom ND5Y
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Re: TK-880: DI input dead
Disregard: PTT buffer issue.
Bob NO6B
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At 1/1/2021 09:25 PM, you wrote: I'm trying to modulate a Kenwood TK-880 via the DI input. Have done this on half a dozen radios, but the one currently on my bench won't modulate. MIC input works fine, but I need the DI input. The problem appears to be somewhere in the firmware, as the audio switch controlling DI, IC4, is open. I could fix the problem by jumpering the audio switch, but I've never had to do this before. So I'm wondering what I'm missing in either the codeplug programming or resistor jumper configuration that's causing this DI input switch to remain open. Have been staring at this thing too long (all day today, mostly to get at the buried VCO board to bring the TX in this 450-490 radio down to 420 MHz).
Thanks
Bob NO6B
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I'm trying to modulate a Kenwood TK-880 via the DI input. Have done this on half a dozen radios, but the one currently on my bench won't modulate. MIC input works fine, but I need the DI input. The problem appears to be somewhere in the firmware, as the audio switch controlling DI, IC4, is open. I could fix the problem by jumpering the audio switch, but I've never had to do this before. So I'm wondering what I'm missing in either the codeplug programming or resistor jumper configuration that's causing this DI input switch to remain open. Have been staring at this thing too long (all day today, mostly to get at the buried VCO board to bring the TX in this 450-490 radio down to 420 MHz).
Thanks
Bob NO6B
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Matt Lechliter
Alan KM4BA
Paul Metzger - K6EH
Karl Shoemaker
n9wys