Users may not create topics, posts, or private messages containing or relating to the following material (especially pertaining to Motorola copyrighted software, unless you want Motorola to come along and shut this site down):

  • Listing for sale or trade of, or links to sites offering for sale or trade of, or giving away, Radio
    Service Software (RSS) or Customer Programming Software (CPS)
  • Profanity, pornography, defamation, or slanderous remarks directed towards any individual or entity
  • Commercial advertising (except in the Batboard Vendors forum, as approved by the Admin/Mod Staff)
  • Any other items which may be deemed as offensive

If any topics, posts, or private messages containing or relating to the aforementioned material are brought to the attention of the Admin/Mod Staff, they will be deleted.

Additional FAQ items appear here in Forum Rules. Please review them for posting guidelines and further clarification.

Broken channel selector knobs on MT1000's,

The General forum is where users can discuss any topic regarding Motorola communications equipment - hardware, software, etc. There are also several focused forums on this board, so please take the time to ensure that your questions doesn't fall into one of those categories before posting here!

Moderator: Queue Moderator

Charlied
Posts: 80
Joined: Mon Feb 10, 2003 1:15 pm
What radios do you own?: MTS2000

Broken channel selector knobs on MT1000's,

Postby Charlied » Wed Aug 09, 2006 10:19 am

possibly others.

Gorilla glue works.

I had my doubts.

I add so little to the site, I just had to jump all over this one.
KI4ISE

RadioSouth
Batboard $upporter
Posts: 2879
Joined: Mon Sep 03, 2001 4:00 pm

Postby RadioSouth » Wed Aug 09, 2006 1:13 pm

Probably won't last long. The Genesis series knobs seem to dry out and just self disintegrate over time. I've replaced at least half the knobs on my Genesis radios (have 12 of them) and none were broken until they were turned then just fell apart. The speaker mics for this series aren't much better either, strain reliefs just turn to a tarry ooze, granted they were stored about a year in a warm garage, but to just break down like this pretty much sux.

Will
Posts: 6823
Joined: Tue Sep 04, 2001 4:00 pm

Postby Will » Wed Aug 09, 2006 1:18 pm

Radio South is correct. Only thing to do is order new knobs, and yes Motorola did change vendors/design.

Have the same problem with the spkr/mic cables and strain releifs. The angle strain relief is still available.

User avatar
kb0nly
AKA: The Computer Doctor
Posts: 3370
Joined: Tue Apr 01, 2003 1:15 am

Postby kb0nly » Thu Aug 10, 2006 7:19 pm

Yep, been there done that, plenty of dried out knobs that look good until you try to use it. They don't break, they just crumble.. They didn't use the best plastic for them evidently.
Duct tape is like the force, it has a dark side and a light side and it holds the universe together.

"I Reject Your Reality And Substitute My Own!" - Adam Savage

User avatar
WA3VJB
Posts: 105
Joined: Mon Jun 26, 2006 9:36 am

Postby WA3VJB » Fri Aug 11, 2006 12:42 am

Damndest thing, but true, and apparently heat or sunlight related (UV). I have several mint HT600 and MT1000 examples that were stored somewhere near a window (maybe on the ledge???) and the knobs turned brittle, and cracked as soon as you put torque to them.

Same thing looks like it's happening on the PTT "lever" as they call it, that thin plastic rectangle over the push to talk button. Characteristic signs include a white milky surface of oxidation (or separation of plastic polymers) that you can wipe off.

I've got one of them that cracked the other week.
Order replacements while you can stil get them. Knobs are about $5, SQ/CH and the PTT lever is under a buck.
Last edited by WA3VJB on Thu Jan 16, 2014 3:43 am, edited 1 time in total.

User avatar
kb0nly
AKA: The Computer Doctor
Posts: 3370
Joined: Tue Apr 01, 2003 1:15 am

Postby kb0nly » Fri Aug 11, 2006 7:04 am

I've had a lot of them with the milky white PTT piece. I remember when i first started working on them i thought it was dust dirt or dust, but scrub as you may they won't ever totally come clean.

At least the plastic of the cases seems to be stable.
Duct tape is like the force, it has a dark side and a light side and it holds the universe together.



"I Reject Your Reality And Substitute My Own!" - Adam Savage

ve7wdm
Posts: 6
Joined: Sat Jul 12, 2003 11:44 am

Re: Broken channel selector knobs on MT1000's,

Postby ve7wdm » Mon Jan 06, 2014 7:44 pm

I, too, have noted this strange deteriation. Unfortunately, I have three unused, mint condition HT600's (with consecutive serial numbers) who's knobs have completely crumbled to dust. :-(. Has anyone on the forums got any replacements they'd like to sell? -Wes Martin.

RadioSouth
Batboard $upporter
Posts: 2879
Joined: Mon Sep 03, 2001 4:00 pm

Re: Broken channel selector knobs on MT1000's,

Postby RadioSouth » Mon Jan 06, 2014 8:26 pm

They've been NLA for quite a while. I'm using MT500 knobs (metal) as a permanent fix. Channel dot on the knob doesn't line up to the right channel but the Vol. knob is perfect.

User avatar
TomSlick
Posts: 364
Joined: Sat Mar 09, 2002 4:00 pm

Re: Broken channel selector knobs on MT1000's,

Postby TomSlick » Wed Jan 08, 2014 11:38 am

Sounds like a perfect job for someone with a 3D printer and some spare time.

User avatar
WA3VJB
Posts: 105
Joined: Mon Jun 26, 2006 9:36 am

Re: Broken channel selector knobs on MT1000's,

Postby WA3VJB » Thu Jan 16, 2014 3:54 am

RadioSouth wrote:They've been NLA for quite a while. I'm using MT500 knobs (metal) as a permanent fix. Channel dot on the knob doesn't line up to the right channel but the Vol. knob is perfect.


Yes, I found that advice for the substitute knob on this board ! Many thanks. Here's what it looks like, installed:

Image

I found that the volume control shaft size is a little bigger on the MT1000 and I had to drill the MT500 knob a little to make it work. Still plenty of perch for the threaded key to tighten with.

Which reminds me, is there a known size to ask for when trying to buy the hex spline that fits these knobs? It's not a standard hex, with an extra flute on the flat sides. I've seen this type on knobs for military receivers, I think they're called hex spline rather than the conventional "Allen" type. I used to have one with my HT220 but it's long lost.

AL7OC
Posts: 178
Joined: Fri May 21, 2010 1:13 am
What radios do you own?: Motorola, Icom, Thales, Tekk

Re: Broken channel selector knobs on MT1000's,

Postby AL7OC » Thu Jan 23, 2014 9:08 pm

I think that they are known as Bristol splines. You can find sets online.

PL
Pierre

AL7OC


Return to “General Motorola Solutions & Legacy Radio Discussion”

Who is online

Users browsing this forum: No registered users and 3 guests