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Schematic for MTR2000 UHF 100 watt amp?

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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VE3TUH
Posts: 231
Joined: Fri May 24, 2002 3:14 pm
What radios do you own?: more than I should...

Schematic for MTR2000 UHF 100 watt amp?

Postby VE3TUH » Fri Mar 10, 2017 7:28 am

Hi. Not real hopeful here, but thought I would throw this out. Looking for the schematics for the MTR2000 UHF 100 watt amp. Looking to find the band identifier resistors and play with them. I would also be willing to purchase a manual if anybody has one.

Randy

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kcbooboo
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Re: Schematic for MTR2000 UHF 100 watt amp?

Postby kcbooboo » Sat Mar 11, 2017 12:37 pm

The band identifier resistors seem to be the same one as on the VHF amplifiers, but the values are probably different. There's an article about making the 100w VHF amp work in the ham band that may be helpful.

Bob M.
======

VE3TUH
Posts: 231
Joined: Fri May 24, 2002 3:14 pm
What radios do you own?: more than I should...

Re: Schematic for MTR2000 UHF 100 watt amp?

Postby VE3TUH » Sat Mar 11, 2017 1:59 pm

Yep I've done it. I am guessing that the UHF circuitry for band identification may be similar to the VHF, at least hoping so.

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kcbooboo
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Re: Schematic for MTR2000 UHF 100 watt amp?

Postby kcbooboo » Sun Mar 12, 2017 9:31 am

There seem to be TWO resistor pairs. R4560/4564 seems to determine the power and possibly range split. Another pair might be used to determine the band. The 100w UHF PA has 15k (153) resistors installed for R4560/4564. The 100w VHF-hi PA has 1.5k (152) resistors there and the 100w VHF-lo PA has 15k (153) resistors there. Whatever they do, it doesn't make any logical sense yet.

Bob M.


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