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Motorola PURC 5000 350W Amplifier - Specifications?

This forum is for discussions regarding System Infrastructure and Related Equipment. This includes but is not limited to repeaters, base stations, consoles, voters, Voice over IP, system design and implementation, and other related topics.

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d119
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Motorola PURC 5000 350W Amplifier - Specifications?

Postby d119 » Sun Dec 23, 2012 11:06 am

Does anyone know what the specifications and requirements are for a Motorola TLD2742A PURC 5000 350W amplifier?

I understand this is a VHF-Highband amplifier, but I need to know what the voltage requirements are, drive power, and basically how this amplifier could be used outside of the PURC 5000 itself.

Anyone have any knowledge on these?

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Re: Motorola PURC 5000 350W Amplifier - Specifications?

Postby kcbooboo » Sun Dec 23, 2012 11:14 am

Without looking at any manuals, I'd suspect it's just like the MSF5000 high-power VHF stations: the IPA puts out a few watts, a Driver PA ups that to 75-150 watts, and a Final PA boosts that to 350 watts, with forward and reflected power sensors everywhere. The VHF stations used 28V for the PAs, where all the others used just 14V. Power control is done in the RF Tray by sensing the power going to the antenna jack and regulating the IPA drive.

Bob M.

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The Pager Geek
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Re: Motorola PURC 5000 350W Amplifier - Specifications?

Postby The Pager Geek » Sun Dec 23, 2012 11:16 am

I Gotta dig it up...

Manual # 6881067E50

tpg
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d119
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Re: Motorola PURC 5000 350W Amplifier - Specifications?

Postby d119 » Sun Dec 23, 2012 1:03 pm

TPG,

Much obliged if you could look into these specs for me...

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Doug
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Re: Motorola PURC 5000 350W Amplifier - Specifications?

Postby Doug » Sun Dec 23, 2012 1:28 pm

Chris
Although my manual doesn't have any specifics with reference to the 350 watt there is one little blurp I found interesting
"25 Watts, VHF- maybe used as a final amplifier for the 25 watt configuration or as a driver amplifier in the 350 watt configuration"
Doug
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Re: Motorola PURC 5000 350W Amplifier - Specifications?

Postby xmo » Sun Dec 23, 2012 1:50 pm

Driver PA: 1/2 to 5 Watts in from IPA, 12-22 Watts out.

Final PA TLD2742A (146-174 MHz) Input level 10 to 15 W., output 350 to 410 Watts.

Runs on 28 VDC - a whole LOT of it - two TPN1260A power supplies in parallel. They are each rated at 27-32 VDC @ 19.5A in addition to other voltages for other parts of the station.

The 350 Watt station draws 1610 Watts from the AC line when transmitting.

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d119
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Re: Motorola PURC 5000 350W Amplifier - Specifications?

Postby d119 » Mon Dec 24, 2012 9:26 am

OK, so something on the order of a 50A 28V supply, along with 10-15W Drive would produce rated power on this amplifier?

THANK YOU gentlemen for the information. This helps me get this guy going with his amplifier.

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Re: Motorola PURC 5000 350W Amplifier - Specifications?

Postby OldDawg » Tue Jun 20, 2017 11:05 am

can I BUMP this up after all these years.......Does anyone know what the proper metering is for the high power VHF PA?


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