I agree that the CAT1000 is kind of a PIA to program, but I have gotten
used to it. We have several in use for many years with no complaints.
Most have static configurations that do not need changing.

You have to be careful of the? version of the Xmodem file transfer
protocol that you use.? Not all Xmodems protocols are the same.? I use
the one in Procomm Plus with success.? This may be your lockup problem.

73, Joe, K1ike


On 10/27/2022 1:51 PM, Jamie WW3S wrote:

biggest issue is lack of support, and unable to program using the
software. Cant get the software to run on a newer PC, and when trying
to manually program, it locks up, and takes forever to unlock.


------ Original Message ------

From "Teton Amateur Radio Repeater Association (TARRA)"

To [email protected]
Date 10/27/2022 1:32:37 PM
Subject Re: [repeater-builder] so whats everyone using for repeater
controllers now?

"Something wrong with the CAT? Why are you upgrading"

That is what I was wondering. They are a solid controller.

Mick - W7CAT
(Not related to the controller company)


----- Original Message -----
From: "Chris Baldwin via groups.io"
To: [email protected]
Sent: Thursday, October 27, 2022 08:37:14 AM
Subject: Re: [repeater-builder] so whats everyone using for repeater
controllers now?

I'm still using a mix of Palomar Telecom, ACC and RLC units.

Something wrong with the CAT? Why are you upgrading?

I will say that I've had some conversations with the SCOM folks

recently about unrelated subjects and found them very communicative
and helpful. Unfortunately they don't support "California Linking".

Before anyone says anything, the ACC units are on standalones.

Best,

Chris
--
Chris Baldwin, CETSr. (KF6AJM)
Trustee - MetroNET Cal. Intertie (KB3PX)

-- Untitled Document

I hope a few of the major brain in this group will be able to help me with this,a friend got this Trimble Thunderbolt E P/N 60333-50. without any cable or antenna , not even a power supply.
Found a PDF on it. (well a kit for evaluation).
I got it for cheap, helped him fix a repeater he got on the same pallet he got the Trimble from.
So I am there never played with one of those and wonder if anyone have some useful hint to give me before I send 24 volt down its connector.
Does it need a perfectly stable power source like a 0.01volt stability over 24 hours or just plain old 24 volt from a wall wart?
I have a few powered GPS antenna that run out of 5v on the coax. Good idea to connect them or should i try to find the one from Trimble absolutely?
Software, I've seen this <>?, is it ok to use with that device? the original Trimble software is available somewhere? will I need to run it on a vista machine?
I want to use it as a time base for my test set, and my hp8640B generator as well as my Marconi 2018.
Thanks for any info.
Pierre
VE2PF
_._,_._,_
----------------------------------------------------------------

From: "k9wkj" <k9wkjham@...>
To: "repeater-builder" <[email protected]>
Sent: Wednesday, October 26, 2022 10:20:26 PM
Subject: Re: [repeater-builder] so whats everyone using for repeater controllers now?

The DB228E model does cover 144-148 with low SWR... It was designed for the 140-150 MHz range.. however, it does not have the game as a DB228A model. This is due to the elements being cut longer but the mast remaining the same length so they are spaced closer? thus producing less gain at the horizon. A DB224A model will have 6 db gain omni... A DB228A will have 3 DB more Omni....but the E range models are 5.2 and 8.1 db respectfully...

I have a DB228A on my 146.34/94 rptr...50w fwd and maybe 4 watts reflected ..I can live with that But down in the 145 subband, it has too much reflected as well as tilt to be useful there...same with a DB224A on 145 rptrs. They may show low reflected but the phase of the elements is outside it's design...the signal isn't maxed at the horizon as it should.

Chris

WB5ITT

It's a great antenna. It won't cover the entire range with low SWR.? The E on the end could be all the elements are in a line, or it could be the lower split perfect for Ham repeaters. Does it have a frequency on the tag?

On 10/27/2022 7:18 PM, Jeff Acree via groups.io wrote:

[Edited Message Follows]
[Reason: Error in the subject line. ]

Friends,

?I should have said DB228E.

I picked up the subject antenna today due to a friend of mine decommissioning his repeater.? He did not have the manual though.? I was wondering if anyone in the group could help me.

Thanks!
Jeff KC8VFN.

On 10/27/2022 10:48 AM Kevin Custer <kuggie@...> wrote:

John,

Clipping of high frequencies doesn't result in their reduction.? In fact - clipping of any frequency range doesn't result in their reduction, but rather a greater overall average, which is why audio processing results in more "umph" as you say.

But - nothing says you NEED to add clipping at the repeater.? The point of which clipping occurs can be set at a point lower than where maximum allowed bandwidth occurs on the channel.? In this case - the audio processor would just be there "in case" something is inputted that would otherwise over deviate / modulate the channel resulting in splatter into adjacent channel spectrum.

Another big advantage of widening the bandwidth in terms of frequency response is cascaded radio links.? After you cascade several radios with <3kHz audio bandwidth, the throughput audio is severely degraded.? These days, multiple hop links are not the norm because of other linking methodologies that use IP.? As such - depending on the utilization, audio bandwidth that's greater than 3kHz can be desirable.

Of course - all of this is subjective and is dependent on ones hearing quality.? I'm still able to hear a difference between 2700 and 3kHz.

Kevin


On 10/27/2022 10:25 AM, John wrote:

Morning Kevin,et al,

I agree for the initialing radio that pre-emphasis before clipping is the way to go. My thoughts are that if it is done again, there are loss of too many highs if it is desired to add a little compression to the repeater. Perhaps I am wrong, but by a little bit of clipping ( audio compression using clipping) in the repeater done at a flat audio point, there will not be more loss of highs in proportion to mid and low frequencies and direct audio will sound the same as repeat audio just with a bit more "umph". By the way , note that with the Micor and SyntorX9000 audio curves that if there was no clipping, the low pass knee could be as low as 2500cps and repeat would sound identical to direct, so going to 3000cps on thru-put just adds undesirable transmit bandwidth with no range gain, and possibly more squelch tail noise vs audio peaks.

John

On 10/27/2022 9:35 AM Kevin Custer <kuggie@...> wrote:

John mentions the process on how he'd implement one audio processing product that is "out there".? I purposely didn't reference the AP-50 in my earlier post so people wouldn't consider the post a sales opportunity.

John says that he'd apply clipping to audio that's spectrally flat.? I wouldn't - and here's why.

Everyone knows the energy in the upper part of the frequencies for voice communications are considerably lower than the lower ones.? Clipping voice audio that's spectrally flat then doesn't apply as much processing to these upper frequencies that are lower in level.? I prefer to pre-emphasize the audio prior to clipping as it sounds better to me.? If you look at some of the exciters that have been used to build repeaters over the years, many of them, including the Motorola MICOR also pre-emphasize the audio before its application to the clipping stage.? In fact - some phase modulated exciters will pre-emphasize - clip - filter - de-emphasize and then feed the PM which ultimately pre-emphasizes the resulting audio.? Evidentially Motorola thought this sounded better too, otherwise they would not have gone through all of the pre - de machinations.? Motorola's FM exciters in this line simply deleted the de-emphasis stage so the resulting pre-emphasized - clipped - filtered audio was applied to the FM modulator.

The AP-50 is designed to allow the builder to choose which method they feel is best for them.? This is very casually mentioned in the AP-50's data sheet.

Like Bob Dengler said - the challenge is the overall headroom required.? Thankfully - with 12V applied to the output op-amp stage the circuit (just) makes it without adding clipping past the LPF, which would be terrible and defeat the protection the processing is supposed to provide in the first place.

Kevin W3KKC


On 10/26/2022 9:45 PM, John wrote:

This ongoing discussion on setting repeater audio stimulated me to check out Kevin's AP-50 which had been sitting in the workshop for years without being put to use. There has been absolutely no collusion or discussion with Kevin . Years ago I had made the enclosed graph on first a SyntorX9000 mic input audio vs deviation from 50-5000cps, and then as comparison a phase modulated Micor and then a FM?? modulated Micor, all on 6 meters. It is not quite apples vs apples because the modulation limiter was set for max dev at 1000cps of a bit more than +-6Kz on the X9000, unknown level on the phase modulated Micor, and +-9KHz? at 1000cps on the FM Micor. As you can see, the X9000 had an exactly even 6dB/ octave pre-emphasis from 50 to 2250 cps and a superior roll off above 3KHz. (could make a good sounding repeater). The AP-50 did not have the pre-emphasis option? hooked up before the clipper so you can see how flat it is between 250 and 3000cps, but wow what a comparatively steep roll off above 3000cps! The input level on the AP-50 was set below clipping for this test. 10K input resistance, 100 ohm output resistance, 12.6V power as specified for the AP-50

All the discussion points came together. If I were to put together another repeater, from the discussions, I would, go into the receiver to flat audio output that is de-emphasized, notch the RX PL tone, place the P-50 probably after the controller where the audio is still not pre-emphasized? so any desired clipping is done on flat audio? and depending on how the transmitter is configured, either do mic input or digital input, and probably no equilization required. The transmitter modulation limiter would either be bypassed via the digital input, or if the mic input was used, the mod limiter would need to set to at least 9 KHz peak for the repeater to pass up to 3KHz audio unimpeded. Actually I find about 2700cps is just fine for the repeat audio to sound same as direct especially if channel spacing is any tighter than 20 KHz.

John W1GPO

[Edited Message Follows]
[Reason: Error in the subject line. ]

Friends,

?I should have said DB228E.

I picked up the subject antenna today due to a friend of mine decommissioning his repeater.? He did not have the manual though.? I was wondering if anyone in the group could help me.

Thanks!
Jeff KC8VFN.

How / when does the fan normally operate in a DR-1X?

Thanks!
Jeff KC8VFN