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XPR7550 RF adapter

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motorola_otaku
Posts: 1820
Joined: Tue Jan 13, 2004 7:03 am
What radios do you own?: 2 turntables and a microphone

XPR7550 RF adapter

Postby motorola_otaku » Wed Dec 06, 2017 1:43 pm

So my XPR got run over by a car the other day :o and I figured I'd do a full alignment on it while it was on the bench getting a new everything except the main board. I found the RF service port on the back, and these part #s for the adapter:
PMLN6154A, RF ADAPTER and PMLN6155A, RF ADAPTER HOLDER

which cost a whopping $158 and $134 from MOL, respectively. No thanks.

Is there a more cost-efficient alternative? Or should I just go find a shop to "borrow" one from?

edit: for reference, here's a pic of the connector:
Image
When exposed to Rapid Fire Growth or Thermal Emergency, two things are lost:
1. Ability to use fine motor skills
2. Presence of mind

N4KVE
Posts: 1582
Joined: Wed Apr 02, 2003 10:35 am
What radios do you own?: XTS3000/5000, TRBO, 900MHZ

Re: XPR7550 RF adapter

Postby N4KVE » Wed Dec 06, 2017 5:56 pm

Sadly, that's it. GARY.

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Bill_G
Posts: 3052
Joined: Thu Sep 17, 2009 5:00 am

Re: XPR7550 RF adapter

Postby Bill_G » Thu Dec 07, 2017 3:18 am

On the plus side, you're half way to a new one, and there are a few shopping days until Christmas left!

jry
Posts: 320
Joined: Fri Feb 06, 2004 3:14 pm

Re: XPR7550 RF adapter

Postby jry » Thu Dec 07, 2017 5:50 am

looked at the same issue and posted a question to see if there was a standard connector that would fit.

For a single radio I would just use a smaller 50 ohm coax with a center pin and tack the ground close by.

The connector has a built in switch to disconnect the antenna and matching components.

User avatar
motorola_otaku
Posts: 1820
Joined: Tue Jan 13, 2004 7:03 am
What radios do you own?: 2 turntables and a microphone

Re: XPR7550 RF adapter

Postby motorola_otaku » Thu Dec 07, 2017 9:08 am

I tried my limited selection of micro-connectors and nothing worked, so I figured it was something proprietary. Thanks for the responses.
When exposed to Rapid Fire Growth or Thermal Emergency, two things are lost:
1. Ability to use fine motor skills
2. Presence of mind

firecomm
was Fire4117
Posts: 403
Joined: Sun Feb 08, 2004 5:37 pm

Re: XPR7550 RF adapter

Postby firecomm » Thu Dec 07, 2017 4:43 pm

It does look a lot like a satellite radio antenna connector. I wonder if you had a spare one laying around and it's not required, try the connector to see if it fits and if so, cut it up and try using that?

Link to the antennas;

https://shop.siriusxm.com/parts/antennas/

N4KVE
Posts: 1582
Joined: Wed Apr 02, 2003 10:35 am
What radios do you own?: XTS3000/5000, TRBO, 900MHZ

Re: XPR7550 RF adapter

Postby N4KVE » Thu Dec 07, 2017 4:58 pm

I seem to remember the guys on P25.CA trying to figure this out, & could not. GARY

RFguy
Posts: 1294
Joined: Wed Dec 21, 2005 6:17 am

Re: XPR7550 RF adapter

Postby RFguy » Thu Dec 07, 2017 7:46 pm

This is the type of things that piss people off about Motorola. I find most of their stuff is reasonably priced, but something like this, a $15 part for $150.

Really?

com501
Posts: 999
Joined: Fri Nov 02, 2001 4:00 pm
What radios do you own?: Over 50 - All Motorola

Re: XPR7550 RF adapter

Postby com501 » Fri Dec 08, 2017 8:57 am

Put another $100 with the cost of the adapter kit and flat rate it.

Our department has multiples of these kits. All the Gen II radios use some form of this adapter.

N4KVE
Posts: 1582
Joined: Wed Apr 02, 2003 10:35 am
What radios do you own?: XTS3000/5000, TRBO, 900MHZ

Re: XPR7550 RF adapter

Postby N4KVE » Fri Dec 08, 2017 9:02 am

RFguy wrote:This is the type of things that piss people off about Motorola. I find most of their stuff is reasonably priced, but something like this, a $15 part for $150.

Really?
This is an item that only a 2-way shop would buy. Not an end user who wants to attach an external antenna to a Gen 2 radio. Moto's thinking is the shop will generate thousands of dollars in alignments by using this adapter kit. So they price it accordingly. GARY

User avatar
Astro Spectra
Posts: 609
Joined: Sat Sep 22, 2001 4:00 pm

Re: XPR7550 RF adapter

Postby Astro Spectra » Fri Dec 08, 2017 11:47 am

I think it's possible that the coax insert used in DIN41612 connectors might just fit. On the left here:

Image

The ID of the inner bifurcated section is 4.2mm. But could be gently squeezed tighter or open +/- 0.5mm with tweezers.

If this fits I'll mail you one with some coax attached.

35echo
Posts: 102
Joined: Sun Dec 02, 2007 8:07 pm

Re: XPR7550 RF adapter

Postby 35echo » Fri Dec 08, 2017 1:09 pm

motorola_otaku

I posted this on another site.

The connector on those boards appear to be Hirose MS-147. The mating connector for test would be Hirose MS-147-HRMJ-1.
This is a MS-147 to SMA adapter.

Regards

User avatar
Astro Spectra
Posts: 609
Joined: Sat Sep 22, 2001 4:00 pm

Re: XPR7550 RF adapter

Postby Astro Spectra » Fri Dec 08, 2017 1:28 pm

3.4mm OD on the socket.

35echo
Posts: 102
Joined: Sun Dec 02, 2007 8:07 pm

Re: XPR7550 RF adapter

Postby 35echo » Fri Dec 08, 2017 10:50 pm

3.5mm ID on the actual Motorola test adapter.

Regards

jry
Posts: 320
Joined: Fri Feb 06, 2004 3:14 pm

Re: XPR7550 RF adapter

Postby jry » Sun Dec 10, 2017 6:16 am

ordered a inexpensive MS-147 to SMA cable.
Requires disassembly.

There is a roughly $25 straight adapter on the major parts sites. Not sure it's long enough to avoid disassembly on the 7000 but may work on the 3000 series.

They do have longer/ deeper ones but then you get back to the $122 price tag.


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