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Re: TPL PA6-1AE UHF amp
开云体育Hey joe thanks for that, I'll have my radio shop guy maybe take a look at it and see what wecan do. I don't dare go in there because I'm blind and I don't know what I'm looking for.Chad Nelson WI9HF/WRPL979 Janesville Wisconsin 608-754-8671 Send from my spectrum iPhone 16. On Apr 1, 2025, at 9:12?PM, Joe Burkleo via groups.io <jburkleo@...> wrote:
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Re: TPL PA6-1AE UHF amp
Chad,
From what I see in the manual, it says 1-6 watts input for 70-100 watts output.
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My experience with various TPL amps is that a little less drive is better than over driving them.
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It looks like the label on yours doesn't quite match this copy of the manual. That is not all that uncommon.
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I would start at 3 watts and work your way up. If you get to full output, that's where I would stop at with drive level.
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As was mentioned in a earlier post if you delete the pre-driver board your amplifier becomes a PA6-1BE and requires 10-15 watts drive for the 70-100 watts output.
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Joe - WA7JAW |
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Re: TPL PA6-1AE UHF amp
开云体育Hey joe, curious if I can drive that amp using a 5 W minimum from the repeater? Don't know how that tolerance is if it's one watt above the minimum of your level of the drive for the amp. My amp is rated for one to 4 W input, so don't want to burn it outChad Nelson WI9HF/WRPL979 Janesville Wisconsin 608-754-8671 Send from my spectrum iPhone 16. On Apr 1, 2025, at 6:10?PM, Joe Burkleo via groups.io <jburkleo@...> wrote:
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Re: TPL PA6-1AE UHF amp
Chad,
The 851's were originally designed for the overseas market where 25 watts was the max allowed in some countries. Kenwood later on started selling them here in the US. They are roughly? based on the 850 Version 2 firmware and use the same software.
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They are rated for 1-25 watts continuous duty, where as the TKR-850 are 45 watt radios that are rated for continuous duty at 25 watts.
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If you have a TKR-851, that is the ideal radio to use with your amp.
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Joe - WA7JAW
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Re: Tektronix Y400 vs Anritsu Cell Master
I have had a Y400 with both modules for a few years now, and also have a Cellmaster MT8212B.
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For starters, the Y400 has Windows CE as its operating system. It is a touchscreen.
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I compared the Y400 to a Sitemaster S331L that was a few months old and still in calibration. We swept several antennas from low band to 470 MHz. The Y400 and the 331L were within 1-2 db of each other on all the measurements we made. In my opinion other than the portability, the Y400 will produce very accurate results for return loss measurements for antenna testing. ?
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As far as the Spectrum Analyzer goes, I actually think the Y400 might be just a touch nicer to use. The Cellmaster S/A goes down to 9 KHz so it looks pretty low in frequency. You can adjust the span from zero to several MHz depending on the frequency you are looking at. The Cellmaster also has built-in attenuation and preamp to choose from.
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For tuning duplexers, isolators, filters...etc...the edge goes to the Cellmaster but it has to have the Transmission option.? With either one you have to change modes when going from looking at gain to return loss. Both will do the job quite well but you can not display both screens at once like you can with a real VNA. Both have a range of 20-25 MHz to 1000 MHz. There is an option for the Cellmaster that allows it o go lower in frequency in the transmission mode.
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They both need to have good quality test cables and calibration loads. For the Anritsu the Instacal module is OK, but individual loads or an OSL device will give you a bit more precise calibration.
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I recently had the need to add a new window to a master receive antenna system and 2 new channels to a transmit combiner. I used the Cellmaster to do pretty much everything involved in that onsite, including tuning the EMR dual port isolators, the transmit combiner cavities, and the receive window filter.? Since I have the CW generator option, I was able to use that option to speed up the scan refresh rate so there was less delay in the screen updates when tuning everything.
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The CW generator option is not something that I see as real useful as there are no audio generators and it requires the use of a external variable attenuation kit to vary the output level.
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I think the Y400 and the Cellmaster are about the same for battery run time.? The Y400 may actually last a bit longer but mine has 2 batteries in it also making it a bit heavier.
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Whichever route you go try and find something that has as many cables, loads and other accessories with it as possible as those can sometimes cost as much or more than what you pay for the unit.
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Joe - WA7JAW
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Re: THREAT TO 222-225MHz Spectrum
Check this group out: Martin L. Grillo EMT-P, CIC, EMC COM L Inst. / ITSL(t) / COM?T / INTD / INCM / RADO / AUXC Inst W1EMR / Amateur Extra? PGGB063396 / GROL/ R 8 EMS - 37 PAPD - 23 NYPD - 343 FDNY Never forget our Brother & Sister Heroes 9/11/01.? It was not how they died that made them heroes..... It was how they lived! ? Emergency Medical Rescue of New York City's?30th Anniversary 1995 - 2025 Website? Telephone?718 474 0680 Email:?info@... On Tue, Apr 1, 2025 at 17:39 Chris Boone WB5ITT via <setxtelecom=[email protected]> wrote:
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Re: THREAT TO 222-225MHz Spectrum
Nothing new..in the early 80s we had offshore radio location under an experimental license in the UHF...10KW Pulsed wideband and center carrier of 439.200...wiped out the input of our local ATV rptr, which I was half owner...we tracked one down to a tower on the Gulf of Mexico and the license was posted there ..the company, based out of the UK , offered to buy us "amateur hams" linear amplifiers!! NNNOOOOO that wasn't going to fix anything...finally got them off the band since they were secondary to part 97 users under the license... Chris WB5ITT? On Tue, Apr 1, 2025, 4:12 PM Mike Sullivan via <Kn4imu=[email protected]> wrote:
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Re: THREAT TO 222-225MHz Spectrum
At 4/1/2025 02:14 PM, you wrote:
You might be right.? But have not heard of radars operating in 220 MHz, too low freq and need very large antennas. When I first started using 220 in the early 1980s we were still sharing that band with conventional pulse radar, & I do remember hearing it on top of users.? Not often, but it was there.? So no not too low freq. ? Know there are radars that can be interfered with from our 440 MHz band, the reason limited to 50W unless get permission to use higher power. I don't think that's the reason we're limited to 50 watts.? IIRC it was to protect flight termination systems, used to sent destruct signals to missiles/rockets that went off course. Bob NO6B |
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Re: THREAT TO 222-225MHz Spectrum
You might be right.? But have not heard of radars operating in 220 MHz, too low freq and need very large antennas.? Know there are radars that can be interfered with from our 440 MHz band, the reason limited to 50W unless get permission to use higher power.
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But today is not good day to be posting such.? I'll really believe it from other sources.
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73, ron, n9ee |
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Re: THREAT TO 222-225MHz Spectrum
Geniuses. Give them an STA to operate IN THE BAND and expect them to not cause interference. Sounds like the federal government alright. Milair has their own band to operate in, why not do it there? It's okay.. give it time, PTC-220 will be coming after 1.25m next anyways, since every railroad in the US is converting to the 220MHz band for all essential wayside functions.. it'll get jammed fast, and they'll need more bandwith, if they don't already.. they're already getting the boot out of the 800/900 segment by Anterix anyways, because 3MHz x 3MHz isn't enough spectrum for private broadband deployment, allegedly. Mike |
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Re: THREAT TO 222-225MHz Spectrum
At 4/1/2025 01:31 PM, you wrote:
On Sun, Mar 30, 2025 at 05:08 AM, John N. Hudson III wrote: I believe he is president of 220SMA (SoCal 220 coordinator) Nothing yet on the ARRL site about this. I talked to a couple of ARRL officials about this at the local swap meet last Saturday, & it was clear they were already aware of it.? Keep watching... Again note the date, April 1. Again note that the original post was March 29, not April 1. Bob NO6B |
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Re: THREAT TO 222-225MHz Spectrum
At 4/1/2025 01:11 PM, you wrote:
On Sun, Mar 30, 2025 at 05:08 AM, John N. Hudson III wrote: No, it was March 29th. Not a joke: I was interfered with by one of their multi-kW comb generators when they were operating in LA. Bob NO6B |
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Re: THREAT TO 222-225MHz Spectrum
On Sun, Mar 30, 2025 at 05:08 AM, John N. Hudson III wrote:
WA6HYQ post on QRZ says nothing about being repeater coordinator or 220 Spectrum Management.? Also gives different email. Nothing yet on the ARRL site about this.
Again note the date, April 1. ?
73, ron, n9ee |
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Quantar running on batter
I have been trying to get my repeater to work on DC power but I think I'm doing something wrong, or have a wrong setting.? The repeater works fine on AC.? 900mhz with a tln3259A power supply, with the cables on it to connect to the DC system.? ?When I apply 24+ volts to it, I can not get it to power on.? Am I missing a setting in the CPS software or is there something else I need to do?? ?The repeater powers fine from AC.
Thank you
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Chris Boone WB5ITT
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