Re: Recording repeater audio
Audio Grabber....VOX operated, splits files on start/stop and can save as MP3s.....and it's free! Can set save location?local or on cloud iirc...have been using it for almost?20 yrs
On Mon, Apr 28, 2025 at 11:41?AM Mark Swanson via <markhswanson= [email protected]> wrote:
Hello all,
Has anyone ever setup or thought about setting up a computer to record repeater audio and?storing it?to a cloud resource, or is anyone else?interested in that sort of thing?
Mark
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Hello all,
Has anyone ever setup or thought about setting up a computer to record repeater audio and?storing it?to a cloud resource, or is anyone else?interested in that sort of thing?
Mark
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Re: PD526 Duplexer Tuning
I have a local friend with access to much better test equipment than I have access to. I'm trying to see if he will tweak it the rest of the way for me. I got it in the ballpark so maybe he can finish it up.
> 1 - When measuring return loss (match), the RL value will be at least
> twice as much as the loss value of the pad.?
That's correct in theory, but a problem one would likely run into in the real world is that most run-of-the-mill pads aren't exactly 50 ohms.? The result of putting the pad in line is that your S11 may look better or may look worse, or may shift it in frequency due to the cascaded mismatches.? It's a crap shoot unless you characterize the pad separately and "do the math", or include the pad in the calibration which is generally a bad idea because it only degrades the accuracy in the same way as would adding adapters or using ratty test cables.
No pads should ever be needed or used with a VNA when measuring passive devices.
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? --- Jeff WN3A
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I've had issues with dirty power switches over time on these units. You might try a can of deoxit or contact cleaner in the actual power switch. You could probably confirm this is the problem by wiggling or fiddling with it when its in the failure mode and see if it blinks on/off.
?
Chris/AJM
?
On Sun, Apr 27, 2025 at 10:34 AM, nh6bf wrote:
When I reset the power switch, it flashes red briefly and goes out.? If I leave it off overnight, I can come back in the morning, turn it on and work for another month...? Really????? How does one trouble shoot this???
?
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Chris Baldwin, CETSr. (KF6AJM)
Trustee - MetroNET Cal. Intertie (KB3PX)
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Re: 19 inch rack mount AC power strip
"What I'm running off of AC in my cabinet is five AC powered cooling fans, the power supply, and a TNC, which could very well run off DC as well."
Okay, I understand.
Mick - W7CAT
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----- Original Message ----- From: "Chad Nelson" To: [email protected]Sent: Monday, April 28, 2025 09:39:17 AM Subject: Re: [repeater-builder] 19 inch rack mount AC power strip
Chad Nelson WI9HF/WRPL979
Janesville Wisconsin
608-754-8671
Send from my spectrum iPhone 16.
On Apr 28, 2025, at 7:44?AM, Teton Amateur Radio Repeater
Association (TARRA) wrote:
?Yes, it is horizontal to mount to the rack rails.
I have been following this power strip subject. A couple of things
related to this, yes your power switch is broken. I prefer not to have a power switch inside a rack, just another source of problems. Although, maybe your power switch is also a circuit breaker, which is something different and you should probably keep. If someone can see a part number on it, you may just be able to replace it.
The other part of this, how much 120 VAC are you using in the
rack??? I can't think of much of anything to power with 120 VAC in the rack. Other than the power supply to provide the 12 VDC that is it. Everything else is 12 VDC. My repeater is a MSF5000 which is powered outside of it's cabinet. I have another cabinet under the MSF5000 and it has a power supply and again, everything runs on 12 VDC.
Mick - W7CAT
----- Original Message -----
From: "Chad Nelson"
To:
Sent: Monday, April 28, 2025 06:28:47 AM
Subject: Re: [repeater-builder] 19 inch rack mount AC power strip
Is that a horizontal mounted strip for 19 inch rack?
-----Original Message-----
From: [email protected] On Behalf Of Alex
Sent: Monday, April 28, 2025 6:37 AM
To: [email protected]
Subject: Re: [repeater-builder] 19 inch rack mount AC power strip
Take a look at the Tripplite RS-1215-20. Been using it for many
repeater projects, they work very well.
--
Untitled Document
What I'm running off of AC in my cabinet is five AC powered cooling
fans, the power supply, and a TNC, which could very well run off DC as well.
-- Untitled Document
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Re: Stationmaster type antenna available, 152 MHz., Nashville, TN
If the Stationmaster is cut for a higher frequency you will have uptilt. I had a long conversation with an engineer at Commander Technologies about this and they cut the antenna for a lower frequency to impart downtilt. I have a SuperStationmaster originally ordered for 449.35MHz with about 6 deg of downtilt and its factory tuned to 427MHz where it main lobe is at the horizon.?
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Re: 19 inch rack mount AC power strip
Chad Nelson WI9HF/WRPL979
Janesville Wisconsin
608-754-8671
Send from my spectrum iPhone 16.
toggle quoted message
Show quoted text
On Apr 28, 2025, at 7:44?AM, Teton Amateur Radio Repeater Association (TARRA) <tarra@...> wrote:
?Yes, it is horizontal to mount to the rack rails.
I have been following this power strip subject. A couple of things related to this, yes your power switch is broken. I prefer not to have a power switch inside a rack, just another source of problems. Although, maybe your power switch is also a circuit breaker, which is something different and you should probably keep. If someone can see a part number on it, you may just be able to replace it.
The other part of this, how much 120 VAC are you using in the rack??? I can't think of much of anything to power with 120 VAC in the rack. Other than the power supply to provide the 12 VDC that is it. Everything else is 12 VDC. My repeater is a MSF5000 which is powered outside of it's cabinet. I have another cabinet under the MSF5000 and it has a power supply and again, everything runs on 12 VDC.
Mick - W7CAT
----- Original Message -----
From: "Chad Nelson"
To:
Sent: Monday, April 28, 2025 06:28:47 AM
Subject: Re: [repeater-builder] 19 inch rack mount AC power strip
Is that a horizontal mounted strip for 19 inch rack?
-----Original Message-----
From: [email protected] On Behalf Of Alex
Sent: Monday, April 28, 2025 6:37 AM
To: [email protected]
Subject: Re: [repeater-builder] 19 inch rack mount AC power strip
Take a look at the Tripplite RS-1215-20. Been using it for many repeater projects, they work very well.
--
Untitled Document
What I'm running off of AC in my cabinet is five AC powered cooling fans, the power supply, and a TNC, which could very well run off DC as well.
|
Re: Motorola GM300/Maxtrac rear rx pin not passing audio
Second Mixer crystal...not the main freq. one.
I had that problem.?? Got the crystals form China.
73 John VE3AMZ
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From: Tony De via groups.io
Sent: Monday, April 28, 2025 7:28 AM
Subject: Re: [repeater-builder] Motorola GM300/Maxtrac rear rx pin
not passing audio
?
RX crystal needs to be replaced. Had the same issue with other GM300.
?
?
Tony
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Re: 19 inch rack mount AC power strip
Hammond Mfg. of Guelph Ontario make several versions of rack mount
power bars.? They would be available through the regular
distributors.
?
Fred Hammond? VE3HC? (SK) was the inventor of the power bar
!
He told me that several years ago.? Their power bars
are excellent quality not like the junk that is often for sale.
I recently saw a Hammond power bar in a local hospital. (Hospital
Grade)
?
73 John VE3AMZ
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From: Teton
Amateur Radio Repeater Association (TARRA)
Sent: Monday, April 28, 2025 8:44 AM
Subject: Re: [repeater-builder] 19 inch rack mount AC power
strip
?
Yes,
it is horizontal to mount to the rack rails. I have been following this
power strip subject. A couple of things related to this, yes your power
switch is broken. I prefer not to have a power switch inside a rack, just
another source of problems. Although, maybe your power switch is also a
circuit breaker, which is something different and you should probably keep.
If someone can see a part number on it, you may just be able to replace
it. The other part of this, how much 120 VAC are you using in the rack???
I can't think of much of anything to power with 120 VAC in the rack. Other
than the power supply to provide the 12 VDC that is it. Everything else
is 12 VDC. My repeater is a MSF5000 which is powered outside of it's
cabinet. I have another cabinet under the MSF5000 and it has a power
supply and again, everything runs on 12 VDC. Mick -
W7CAT ----- Original Message ----- From: "Chad Nelson" To: Sent:
Monday, April 28, 2025 06:28:47 AM Subject: Re: [repeater-builder] 19 inch
rack mount AC power strip > Is that a horizontal mounted strip for 19
inch rack? > > -----Original Message----- > From:
[email protected] On Behalf Of Alex > Sent: Monday, April 28,
2025 6:37 AM > To: [email protected]> Subject: Re:
[repeater-builder] 19 inch rack mount AC power strip > > Take a look
at the Tripplite RS-1215-20. Been using it for many repeater projects, they
work very
well. > > > > > > > > >
> > > -- Untitled
Document
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Re: Stationmaster type antenna available, 152 MHz., Nashville, TN
Hey Robin,
Did you measure RL without the correct radials? (That could make a difference).
Also, might still be useful at 147, as being lower in frequency, you will get some downtilt.
Andy
On Mon, Apr 28, 2025 at 9:17?AM Robin Midgett via <RobinK4IDC= [email protected]> wrote: I have what appears to be a Stationmaster type VHF antenna available. It shows a -20dB return loss at 152 MHz., so it's not cut for the ham band. The return loss at 146 MHz. is only~ -6dB. The extrior of the fiberglass is obvisouly weathered along the entire 23' length but not "feathered". I'd want to apply a new outer coat of protective paint or resin before putting it into service. Other than that, it seems to be in good mechanical condition. I think I have the radials for it somewere in my stash of too much stuff.
I don't know if it can be modified for ham radio use or if someone on the list would have a use for it as is. Open to offers; would rather it go to somone who can use it than scrap it for the copper and brass. It's near Nashville, TN.
Please email me directly, I don't read the list traffic. I'm good on QRZ.
--
Thank you,
Robin K4IDC
|
Stationmaster type antenna available, 152 MHz., Nashville, TN
I have what appears to be a Stationmaster type VHF antenna available. It shows a -20dB return loss at 152 MHz., so it's not cut for the ham band. The return loss at 146 MHz. is only~ -6dB. The extrior of the fiberglass is obvisouly weathered along the entire 23' length but not "feathered". I'd want to apply a new outer coat of protective paint or resin before putting it into service. Other than that, it seems to be in good mechanical condition. I think I have the radials for it somewere in my stash of too much stuff.
I don't know if it can be modified for ham radio use or if someone on the list would have a use for it as is. Open to offers; would rather it go to somone who can use it than scrap it for the copper and brass. It's near Nashville, TN.
Please email me directly, I don't read the list traffic. I'm good on QRZ.
--
Thank you,
Robin K4IDC
|
Re: Motorola GM300/Maxtrac rear rx pin not passing audio
He is saying he gets a valid COS signal, but that IS indeed a common failure.
Andy
RX crystal needs to be replaced. Had the same issue with other GM300.
Tony
|
Re: 19 inch rack mount AC power strip
Yes, it is horizontal to mount to the rack rails.
I have been following this power strip subject. A couple of things related to this, yes your power switch is broken. I prefer not to have a power switch inside a rack, just another source of problems. Although, maybe your power switch is also a circuit breaker, which is something different and you should probably keep. If someone can see a part number on it, you may just be able to replace it.
The other part of this, how much 120 VAC are you using in the rack??? I can't think of much of anything to power with 120 VAC in the rack. Other than the power supply to provide the 12 VDC that is it. Everything else is 12 VDC. My repeater is a MSF5000 which is powered outside of it's cabinet. I have another cabinet under the MSF5000 and it has a power supply and again, everything runs on 12 VDC.
Mick - W7CAT
toggle quoted message
Show quoted text
----- Original Message ----- From: "Chad Nelson" To: Sent: Monday, April 28, 2025 06:28:47 AM Subject: Re: [repeater-builder] 19 inch rack mount AC power strip Is that a horizontal mounted strip for 19 inch rack?
-----Original Message-----
From: [email protected] On Behalf Of Alex
Sent: Monday, April 28, 2025 6:37 AM
To: [email protected]
Subject: Re: [repeater-builder] 19 inch rack mount AC power strip
Take a look at the Tripplite RS-1215-20. Been using it for many repeater projects, they work very well.
-- Untitled Document
|
|
|
Re: PD526 Duplexer Tuning
1 - When measuring return loss (match), the RL value will be at least
twice as much as the loss value of the pad. That's correct in theory, but a problem one would likely run into in the real world is that most run-of-the-mill pads aren't exactly 50 ohms. The result of putting the pad in line is that your S11 may look better or may look worse, or may shift it in frequency due to the cascaded mismatches. It's a crap shoot unless you characterize the pad separately and "do the math", or include the pad in the calibration which is generally a bad idea because it only degrades the accuracy in the same way as would adding adapters or using ratty test cables. No pads should ever be needed or used with a VNA when measuring passive devices. --- Jeff WN3A
|
Re: 19 inch rack mount AC power strip
Take a look at the Tripplite RS-1215-20. Been using it for many repeater projects, they work very well.
|
Re: Help with out of range programming a Motorola GP300
For what it is worth, the frequency ranges for the GP300 (and P110) radios are as follows:
VHF
136-155MHz
146-174MHz
UHF
403-433MHz
438-470MHz
465-496Mhz
490-520Mhz
Using shift during frequency entering in RSS will allow for almost any entry, but radio specific VCO will only give you some leeway outside its own range, but not too much to operate well into the adjacent lower or higher ranges, specially for UHF models.
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Re: Motorola GM300/Maxtrac rear rx pin not passing audio
RX crystal needs to be replaced. Had the same issue with other GM300.
Tony
|
Re: PD526 Duplexer Tuning
You shouldn't use an attenuator pad with a VNA.? If you do - at least two things happen, depending on where your calibration plane exists:
1 - When measuring return loss (match), the RL value will be at least twice as much as the loss value of the pad.? Why?? The signal travels through the pad twice.? A 3dB pad will show a 6dB return loss even if the opposite port of the pad is shorted or open.? If you calibrated at the output of the pad - all you did was reduce the ability to measure S11 by 6dB.
2 - You reduce the dynamic range capability by the amount of the value of the pad.? You're already running the NanoVNA out of dynamic range, so the last thing you need is to reduce it even more.
VNA's are calibrated devices (when you do the calibration), and pads are not only unnecessary, but undesired.
0.8dB of insertion loss for a fully coupled PD526 is about right. You have no idea how much rejection you actually have because the NanoVNA is incapable of measuring the notch depths of a properly tuned PD526.? See how grassy the notches look, that's not measuring signal - that's revealing the noise floor of the instrument.? If you disconnected the cables from everything - you'd see the same type of response.? In reality, you need about 10dB more dynamic range of an instrument to accurately measure response.? That means you'd need an instrument that has the capability of 130dB of dynamic range to completely and fully see the bottoms of the notches.? Your NanoVNA has about 90dB of dynamic range, allowing you to reveal about -80db (or so) of notch depth.
Kevin
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On 4/28/2025 6:41 AM, Part 15 Engineer via groups.io wrote:
After hours of going at it. I have come to this point. I think it looks alot better, but still probably can be improved. 2 things. I can't set the nvna for more than 1024 points and the point rbw seems to unable to be changed from the 4000 hz setting. If someone knows how to change the rbw in nanovna app, immall ears. other points in the previous post were followed. I also added a 3db pad to the generator port and calibrated the nvna with the pad inline. Now I have both high and low sides looking similar. This is the high side. What should the total s21 gain be for each side approx.? I can't seem to get it lower than -0.8xx on each side. The s21 gain on reject averages about -70. The jumpers I'm using to tune will be the same ones used for the final installation. They are 2.0 meter new old stock 1/4 inch hardline with N connectors that came from cellular service. The nvna has sma to N connectors. I will follow up this post with pics of my test configuration.
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Current M dealer price is $1,950, VHF or UHF same price.
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Chris Boone WB5ITT
Chris Baldwin
Robin Midgett
Kevin Custer