#183431

I have two 100w UHF MTR2000s that are perfectly good but
the AC side of the power supplies are dead.... they work fine
with a 24 or 28v DC supply of adequate current...

But I'd like to get the AC side working again.

Moto does not offer tech manuals or schematics for these units...
I'm hoping that someone has done some reverse engineering
on them and will share.

Mike WA6ILQ

#183434

Mike,
Hey ...it's really good to see you back on here posting again.

I have one of these power supplies that I starting digging into also.

It's been a while since we talked on the phone but if you still have the same number I will give you a call in the next day or so or if you still have my number give me a call when you have a chance.

I have the field manual for the UHF MTR2000's. Lots of good stuff in it, but there is no detailed service info or schematic's..

Joe - WA7JAW

#183436

The most common failure to these supplies was simply two fuses and two varistors (the two blue discs right near the two fuses).

It's pretty much a MUST to have some sort of AC surge protecting device on an MTR2000. Outside of that, they are work horses.

Sorry, don't have a schematic for you.

Paul Metzger

k6EH

#183440

开云体育

Those foreign power supplies are a nightmare, and hardly worth it unless it’s only a fuse or something simple.

You can always run it on 24-28vdc and it’ll probably last longer.

I’ve put a number of them on the Meanwell DIN rail DC PSupplies after the AC power supply fails and they’ve been working for years now.

Just FYI.

Good Luck.

VR
Rick

Kk4b

?

Show quoted text

From: [email protected] <[email protected]> On Behalf Of Paul Metzger - K6EH
Sent: Monday, January 04, 2021 9:23 AM
To: [email protected]
Subject: Re: [repeater-builder] Anybody have schematics or notes on MTR2000 power supply fixes?

?

The most common failure to these supplies was simply two fuses and two varistors (the two blue discs right near the two fuses).

?

It's pretty much a MUST to have some sort of AC surge protecting device on an MTR2000. Outside of that, they are work horses.

?

Sorry, don't have a schematic for you.

?

Paul Metzger

k6EH

This email has been checked for viruses by Avast antivirus software.

#183450

My MTR 2000 UHF, the power supply gets really, really hot, around 110 degrees! Any idea what would cause that?????????

Show quoted text

On Mon, Jan 4, 2021 at 7:23 AM Paul Metzger - K6EH <paulmetzger@...> wrote:

The most common failure to these supplies was simply two fuses and two varistors (the two blue discs right near the two fuses).

It's pretty much a MUST to have some sort of AC surge protecting device on an MTR2000. Outside of that, they are work horses.

Sorry, don't have a schematic for you.

Paul Metzger
k6EH

--

Glenn (Butch) Kanvick

KE7FEL/R

1-406-655-1232

?

#183581

Paul - thanks for the pointer to the fuses and varistors.? I disassembled one of the PS enough to check them - all good.? Drat!
Still having to use a 24v power supply...

Somebody, somewhere has to have a schematic.? That is a VERY complex power supply.? Until I get a road map I'm not going to even try.

I have 7 MTRs in service at commercial sites, and I hate having to use an external supply.

Mike WA6ILQ