Re: [Repeater-Builder] OT: Radios and Coms in TV and Movies

[neal Newman]

LOL...
 Yeah   Thats one thing I did miss amaizing  How Only Hams would notice the 
small Items

It just reminded me  I was just watching an old Andy Griffith show..
 In the Police station  The base radio was an Eico 720
 Gotta look back at the really old shows..



--- On Mon, 2/2/09, DCFluX  wrote:

> From: DCFluX 
> Subject: Re: [Repeater-Builder] OT: Radios and Coms in TV and Movies
> To: Repeater-Builder@yahoogroups.com
> Date: Monday, February 2, 2009, 9:17 PM
> Blue short antenna, 31 series...
> 
> On Mon, Feb 2, 2009 at 5:48 PM, neal Newman
>  wrote:
> >  watch the movie again.
> >  some of the Hts  were the AT series  and had tone
> pads   . Others did not
> >  and the antenna was too thick to be the UHF series...
> My guess is the TH-21AT radios..  I am looking at Mine
> sitting On the desk
> >
> >  Neal
> >
> >
> >
> >> > Sorry-in hindsight they were 41A's, not
> the AT
> >> version...no DTMF pad.
> >
> >
> >
> >
> >
> >
> > 
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> 
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 

  

[Repeater-Builder] Comparison Between P25 & Conventional Radio Data Transmission

[Kent Chong]

Dear Sir,

We are interested in upgrading our current analog radio into P25 system. Does 
anyone have the comparison between the P25 and conventional radio? We will be 
using the radio for voice and data transmission.

Best Regards,

Kent Chong



  New Email addresses available on Yahoo!
Get the Email name you've always wanted on the new @ymail and @rocketmail. 
Hurry before someone else does!
http://mail.promotions.yahoo.com/newdomains/sg/

Re: [Repeater-Builder] Re: OT: Radios and Coms in TV and Movies

[JOHN MACKEY]

Class C was the remote control

-- Original Message --
Received: Mon, 02 Feb 2009 01:35:55 PM PST
From: wd8chl 
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: OT: Radios and Coms in TV and Movies

> MCH wrote:
> > Wrong.
> > 
> > GMRS is "Class A CB" (FCC designation) while the 27 MHz band is "Class D 
> > CB". I don't recall what classes B and C were offhand. 
> 
> One of them was a radio-control model service...planes, cars, etc.
> 
> 

Re: [Repeater-Builder] Re: Are you ready for narrowbanding?

[no6b]

At 2/2/2009 13:33, you wrote:
>n...@no6b.com wrote:
> > At 1/16/2009 13:38, you wrote:
> >> I absolutely do. There's a TON of non-narrowbandable equipment in use,
> >> and we're not just talking about Micor/MastrII vintage equipment.
> >> Maxtacs, MSF's, even early Quantars and MastrIII's. Pretty much anything
> >> made before, I think, 1996-ish.
> >
> > Why would Micors & Mastr IIs be non-narrowbandable?
> >
> > http://www.com-spec.com/narrow.htm
> >
> > Bob NO6B
> >
> >
>
>1) There is a good likelihood that the mod will break type-acceptance.

No mod. to the TX, other than simply turning the deviation down.

>2) Even if it doesn't, the cost to, say a Fire Dept or business to pay a
>shop to do the conversion is not worth it when you consider the age of
>the equipment.

A good tech. should be able to do the job in an hour, plus maybe another 
hour for removal/reinstallation.  Still cheaper than installing a brand new 
radio.

Bob NO6B

Re: [Repeater-Builder] OT: Radios and Coms in TV and Movies

[DCFluX]

Blue short antenna, 31 series...

On Mon, Feb 2, 2009 at 5:48 PM, neal Newman  wrote:
>  watch the movie again.
>  some of the Hts  were the AT series  and had tone pads   . Others did not
>  and the antenna was too thick to be the UHF series... My guess is the 
> TH-21AT radios..  I am looking at Mine sitting On the desk
>
>  Neal
>
>
>
>> > Sorry-in hindsight they were 41A's, not the AT
>> version...no DTMF pad.
>
>
>
>
>
>
> 
>
>
>
> Yahoo! Groups Links
>
>
>
>

RE: [Repeater-Builder] GE Master II Pa decks

[Nate Duehr]

An isolator with appropriate harmonic filtering AFTER it (they create
harmonics, which are not friendly to your neighbors), presents a nice solid
non-reactive 50 ohm load to the transmitter.  It doesn't matter if it's a GE
MASTR II PA, or someone elses.  Many Motorola PA's have the isolator built
in, for example.

The GE PA likes a 50 ohm load or it tends to do squirrelly things, like die.
You can get this by proper choice of QUALITY products for your
filtering/feedline/antenna system, or you can use an isolator, or you can
have the "belt and suspenders" mentality and always run an isolator on the
output of the PA.  Another good reason to do this at high RF commercial
sites is that the PA (depending on how you may have modified it) has
transistors in the final section that are "always on", thus... mixing can
occur in the PA if RF from the outside world can get down INTO the PA from
elsewhere.  Also not a nice thing for your neighbors.

The final "benefit" to a properly sized dummy load on your isolator is that
the antenna can literally fall off the tower, and the PA will still be
driving into a solid 50 ohm dummy load.  As long as that load is the correct
size for your PA's power level, no damage to the PA will occur, even though
your antenna is gone.

Some late-model MASTR II PA's have built in Z-matchers on their output
Low-Pass Filter board on the right lower side.  These have to be adjusted
correctly per the manual any time a new PA is installed on a new antenna
system, or anything changes in the antenna system.  Older PA's do not have
this feature, but an off-board Z-matcher can be added in lieu of an isolator
if all you're concerned about is matching the source (PA) to the load
(antenna system).

The GE PA comes in different sizes for different power level needs.  The VHF
100W (original with four final driver transistors) was known to get spurious
and throw stuff up and down the band for various reasons.  The newer
three-final-transistor PA's (the most commonly seen) are less prone to do
this, but can also become RF noisemakers if turned down too much.  No MASTR
II tech I know of will recommend turning any MASTR II PA any further down
than roughly 2/3's its maximum rated power output, ESPECIALLY not without
looking at it on a spectrum analyzer to make sure it's not spurring.  When
they go spurious, which is rare enough people get away with turning the PA's
down more than 2/3's, they also typically overheat drastically and they'll
destroy themselves relatively quickly.  

If you need less power than 50W it's highly recommended to remove stages of
the PA to get to the lower power level you need, bypassing them completely,
or moving to a lower power/lower-duty-cycle PA in the model line.

Done right, even after 20 years of commercial service, the VHF MASTR II PA
will happily sit there and put out 85W all day long, without batting an
eyelash.  Many will still do a strong 110W and never care, either.  It's
just a little "easier" on the gear to run the power back just a little bit.
The difference (in dB) between 85W and 110W often isn't significant,
depending on your area you're wanting to cover.

Why are you wanting to turn your MASTR II back so far?  After duplexer
losses, you're down to roughly 20W if you're putting 45W into a duplexer (if
you're running split antenna, with no duplexer and vertical separation,
nevermind -- but I doubt you are), and 20W doesn't "balance" well with 50W
mobiles.  If you're trying to balance for HT coverage only, I could see it
maybe... 

My personal rule for the MASTR II PA's is: Set 'em to 85W and forget 'em.
Put an isolator on for ALL of the good reasons for an isolator, filter it
properly, and forget about it.  The vast majority of them will run for 10 or
more years without touching them again after doing that.

Look carefully at the Repeater-Builder company specifications -- you may be
looking at a MASTR II *MOBILE* rig converted into a repeater.  That's NOT a
MASTR II Repeater PA.  They're de-rating the PA to save it from overheating
and dying, as it's not rated for 100% continuous duty at full power in the
mobile rig with the small heatsink.  The MASTR II REPEATER PA is a giant
heavy thing with plenty of heatsink fins, 19" wide and multiple RU tall,
that is EIA rated to do continuous-duty cycle at 110W for at least 24 hours.

Nate WY0X

-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Randy
Sent: Sunday, February 01, 2009 8:24 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] GE Master II Pa decks

Hi group whats the deal with the GE Master II PA decks needing to use a 
ferrite isolator with a 50 ohm dummy load and a low pass filter between 
the PA and the High Q duplexer. Is this something that most do  with 
the 75 and 100 w Pa's We just replaced one in a Master II Mobile radio 
which lasted for years with no issues. After installing the PA and 
doing a tune up the Radio did a

Re: [Repeater-Builder] OT: Radios and Coms in TV and Movies

[neal Newman]

 watch the movie again.
 some of the Hts  were the AT series  and had tone pads   . Others did not
 and the antenna was too thick to be the UHF series... My guess is the TH-21AT 
radios..  I am looking at Mine sitting On the desk 

 Neal



> > Sorry-in hindsight they were 41A's, not the AT
> version...no DTMF pad.



  

RE: [Repeater-Builder] OT: Radios and Coms in TV and Movies

[Nate Duehr]

This is called "continuity" and if you watch the credits of any modern
movie, you'll see a title like "Continuity Specialist", etc. in there.  A
great job for someone SERIOUSLY organized - make sure during shooting
different scenes over different months that the actor's clothes, their hair,
the lighting, everything in the whole scene. looks "correct" from shot to
shot.

 

I love disassembling movies for these screw ups.  Every movie has some, and
there are whole websites dedicated to finding them.   Something to keep you
busy during a boring movie, I suppose. 

 

Sorry, it's WAY Off-Topic for RB, so I'll shut up now. 


Nate WY0X

 

 

From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Michael Ryan
Sent: Monday, February 02, 2009 3:31 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] OT: Radios and Coms in TV and Movies

 

Next time you watch DIE HARD ( should be on tonight..it is on every night
just about ) pay attention to the scene when John  Mclean is in the mensroom
pulling glass out of his bare feet, and gets a call from Sgt. Al Powell (
the cop ). Mclean answers the call WITHOUT PICKING UP THE HT.  Nice work if
you can get it..  Also note the now GREEN T-shirt.  He was wearing a white
one in the earlier scenes.

-M

 

Re: [Repeater-Builder] OT: Radios and Coms in TV and Movies

[Dave Gomberg]

At 13:26 2/2/2009, wd8chl wrote:
>And they are illegal because they are ham rigs. And it's illegal to use
>ham frequencies for a for-profit business, and movies are made for profit.

It is NOT illegal to show a ham rig in a for-profit movie.   It would 
be illegal to use it to make the movie (wardrobe for Ms Breasts 
please).  If it were a movie about hams, it might be OK to actually 
use it in showing how hams used radios.  If it was supposed to be a 
cop radio, it would be illegal to use it as a cop radio unless the 
actor using it was appropriately licensed and not shooting real 
footage.   Or something like that.   This is not legal advice and I 
am not a lawyer nor do I play one on TV.



-- 
Dave Gomberg, San Francisco   NE5EE gomberg1 at wcf dot com
All addresses, phones, etc. at http://www.wcf.com/ham/info.html
- 

Re: [Repeater-Builder] OT: Radios and Coms in TV and Movies

[neal Newman]

Yeah and If you notice. the HT is actually a Kenwood TH-21BT  radio 

This radio with the optional Headset Does in fact have VOX


 Neal

--- On Mon, 2/2/09, MCH  wrote:

> From: MCH 
> Subject: Re: [Repeater-Builder] OT: Radios and Coms in TV and Movies
> To: Repeater-Builder@yahoogroups.com
> Date: Monday, February 2, 2009, 5:50 PM
> VOX. ;->
> 
> Joe M.
> 
> Michael Ryan wrote:
> > Next time you watch DIE HARD ( should be on
> tonight….it is on every 
> > night just about ) pay attention to the scene when
> John  Mclean is in 
> > the mensroom pulling glass out of his bare feet, and
> gets a call from 
> > Sgt. Al Powell ( the cop ). Mclean answers the call
> WITHOUT PICKING UP 
> > THE HT.  Nice work if you can get it….  Also note
> the now GREEN 
> > T-shirt.  He was wearing a white one in the earlier
> scenes.
> > 
> > -M
> > 
> >  
> > 
> > *From:* Repeater-Builder@yahoogroups.com 
> > [mailto:repeater-buil...@yahoogroups.com] *On Behalf
> Of *STeve Andre'
> > *Sent:* Monday, February 02, 2009 4:39 PM
> > *To:* Repeater-Builder@yahoogroups.com
> > *Subject:* Re: [Repeater-Builder] OT: Radios and Coms
> in TV and Movies
> > 
> >  
> > 
> > On Monday 02 February 2009 16:37:48 wd8chl wrote:
> >  > MCH wrote:
> >  > > Illegal? They were foreign terrorists. How
> many foreign terrorists are
> >  > > going to give a rat's rear about
> compliance with FCC regulations.
> >  >
> >  > Uhhh...Bruce Willis' character was using it,
> along with just about
> >  > everyone using a handheld in the movie.
> >  > And there was definitely places where you heard
> receive audio come back
> >  > out of the radio.
> >  >
> >  > > The only part that was really far fetched
> is when John called the PD on
> >  > > "channel 9" - implying that they
> were using CBs and that the PD 
> > actually
> >  > > monitored channel 9. Oh, and that Al could
> talk to him on his police
> >  > > radios.
> >  >
> >  > I still remember an episode of Hawaii 5-0 where
> they were sitting on a
> >  > boat, and fired up the local AM radio station-on
> a Motorola PT200.
> > 
> > Um, I don't think anyone can tell where the audio
> came from. Yes, using
> > a ham HT is illegal *if it transmits*. But if they add
> the audio "from" the
> > HT later, thats ok. Stuff like that is done all the
> time. Sure, they could
> > have used ham frequencies, but they're used to the
> art of pretending--
> > they're movie makers. ;-)
> > 
> > --STeve Andre'
> > wb8wsf en82
> > 
> > 
> > 
> > __ NOD32 3819 (20090202) Information
> __
> > 
> > This message was checked by NOD32 antivirus system.
> > http://www.eset.com
> > 
> > 
> 
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 

  

RE: [Repeater-Builder] Re: Am I getting through?

[Mark]

OK, thanks Skipp.  I was just checking to see if maybe the direct messages
were becoming vaporware or something.

Thanks in advance for taking time to look at this issue for me.  All
correspondence from now on will be via private messages again.

73 de Mark - N9WYS

-Original Message-
From: Repeater-Builder@yahoogroups.com On Behalf Of skipp025

Hi Mark, 

When I'm out on various  jobs I can't always quickly reply 
via Email... so you're welcome to also try the phone. 

I'll look for your latest set of pictures... but understand 
I receive over 200 emails each day. Sometimes I can't back 
fill to various ongoing small projects/help without a reminder 
or two, or three. 

cheers, 
skipp 

still skipp025 at yahoo.com 

Re: [Repeater-Builder] OT: Radios and Coms in TV and Movies

[Cort Buffington]

Just this weekend I watched "Taken". I had two major complaints. One  
builds on the other.

#1 The "hero" sets his full-duplex cell phone next to an Alinco  
DJS something little 440 ham handheld and then uses another from a  
safe location to talk back and forth so they trace the cell phone and  
find it, but not him I didn't see any way for the cell phone to  
key the Alinco, and that model doesn't have Vox... I used to have one,  
gave it to a friend.

#2 (this one is my favorite). The bad guys had Motorola EX500s in one  
scene. I think it's just terrible that the bad guys get nice radios  
like that and the hero had to use an Alinco FRS radio re-built to be a  
super-low power 440 ham rig.


On Feb 2, 2009, at 4:31 PM, Michael Ryan wrote:

>
> Next time you watch DIE HARD ( should be on tonight….it is on every  
> night just about ) pay attention to the scene when John  Mclean is  
> in the mensroom pulling glass out of his bare feet, and gets a call  
> from Sgt. Al Powell ( the cop ). Mclean answers the call WITHOUT  
> PICKING UP THE HT.  Nice work if you can get it….  Also note the now  
> GREEN T-shirt.  He was wearing a white one in the earlier scenes.
>
> -M
>
>
>
> From: Repeater-Builder@yahoogroups.com 
> [mailto:Repeater-Builder@yahoogroups.com 
> ] On Behalf Of STeve Andre'
> Sent: Monday, February 02, 2009 4:39 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] OT: Radios and Coms in TV and Movies
>
>
>
> On Monday 02 February 2009 16:37:48 wd8chl wrote:
> > MCH wrote:
> > > Illegal? They were foreign terrorists. How many foreign  
> terrorists are
> > > going to give a rat's rear about compliance with FCC regulations.
> >
> > Uhhh...Bruce Willis' character was using it, along with just about
> > everyone using a handheld in the movie.
> > And there was definitely places where you heard receive audio come  
> back
> > out of the radio.
> >
> > > The only part that was really far fetched is when John called  
> the PD on
> > > "channel 9" - implying that they were using CBs and that the PD  
> actually
> > > monitored channel 9. Oh, and that Al could talk to him on his  
> police
> > > radios.
> >
> > I still remember an episode of Hawaii 5-0 where they were sitting  
> on a
> > boat, and fired up the local AM radio station-on a Motorola PT200.
>
> Um, I don't think anyone can tell where the audio came from. Yes,  
> using
> a ham HT is illegal *if it transmits*. But if they add the audio  
> "from" the
> HT later, thats ok. Stuff like that is done all the time. Sure, they  
> could
> have used ham frequencies, but they're used to the art of pretending--
> they're movie makers. ;-)
>
> --STeve Andre'
> wb8wsf en82
>
>
>
> __ NOD32 3819 (20090202) Information __
>
> This message was checked by NOD32 antivirus system.
> http://www.eset.com
>
>
> 

--
Cort Buffington
H: +1-785-838-3034
M: +1-785-865-7206









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Re: [Repeater-Builder] OT: Radios and Coms in TV and Movies

[MCH]

Wouldn't that be an illegal modification that violates the FCC T/A? ;->

Joe M.

DCFluX wrote:
> Funny how a receiver acts like a Full duplex transceiver in the movies.
> 
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 
> 

Re: [Repeater-Builder] OT: Radios and Coms in TV and Movies

[MCH]

VOX. ;->

Joe M.

Michael Ryan wrote:
> Next time you watch DIE HARD ( should be on tonight….it is on every 
> night just about ) pay attention to the scene when John  Mclean is in 
> the mensroom pulling glass out of his bare feet, and gets a call from 
> Sgt. Al Powell ( the cop ). Mclean answers the call WITHOUT PICKING UP 
> THE HT.  Nice work if you can get it….  Also note the now GREEN 
> T-shirt.  He was wearing a white one in the earlier scenes.
> 
> -M
> 
>  
> 
> *From:* Repeater-Builder@yahoogroups.com 
> [mailto:repeater-buil...@yahoogroups.com] *On Behalf Of *STeve Andre'
> *Sent:* Monday, February 02, 2009 4:39 PM
> *To:* Repeater-Builder@yahoogroups.com
> *Subject:* Re: [Repeater-Builder] OT: Radios and Coms in TV and Movies
> 
>  
> 
> On Monday 02 February 2009 16:37:48 wd8chl wrote:
>  > MCH wrote:
>  > > Illegal? They were foreign terrorists. How many foreign terrorists are
>  > > going to give a rat's rear about compliance with FCC regulations.
>  >
>  > Uhhh...Bruce Willis' character was using it, along with just about
>  > everyone using a handheld in the movie.
>  > And there was definitely places where you heard receive audio come back
>  > out of the radio.
>  >
>  > > The only part that was really far fetched is when John called the PD on
>  > > "channel 9" - implying that they were using CBs and that the PD 
> actually
>  > > monitored channel 9. Oh, and that Al could talk to him on his police
>  > > radios.
>  >
>  > I still remember an episode of Hawaii 5-0 where they were sitting on a
>  > boat, and fired up the local AM radio station-on a Motorola PT200.
> 
> Um, I don't think anyone can tell where the audio came from. Yes, using
> a ham HT is illegal *if it transmits*. But if they add the audio "from" the
> HT later, thats ok. Stuff like that is done all the time. Sure, they could
> have used ham frequencies, but they're used to the art of pretending--
> they're movie makers. ;-)
> 
> --STeve Andre'
> wb8wsf en82
> 
> 
> 
> __ NOD32 3819 (20090202) Information __
> 
> This message was checked by NOD32 antivirus system.
> http://www.eset.com
> 
> 





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Re: [Repeater-Builder] OT: Radios and Coms in TV and Movies

[DCFluX]

Funny how a receiver acts like a Full duplex transceiver in the movies.

Re: [Repeater-Builder] OT: Radios and Coms in TV and Movies

[MCH]

wd8chl wrote:
> MCH wrote:
>> Illegal? They were foreign terrorists. How many foreign terrorists are 
>> going to give a rat's rear about compliance with FCC regulations.
> 
> Uhhh...Bruce Willis' character was using it, along with just about 
> everyone using a handheld in the movie.
> And there was definitely places where you heard receive audio come back 
> out of the radio.

And he got it from the terrorists. Given the fact he didn't have any 
other means of communication, I would do the same thing to summon help. 
In fact, that is in the spirit of Part 97's exemption on licensed 
operations.

>> The only part that was really far fetched is when John called the PD on 
>> "channel 9" - implying that they were using CBs and that the PD actually 
>> monitored channel 9. Oh, and that Al could talk to him on his police radios.
> 
> I still remember an episode of Hawaii 5-0 where  they were sitting on a 
> boat, and fired up the local AM radio station-on a Motorola PT200.

Again, who would know better? Most people wouldn't realize the 
impossibility of that happening with that particular model.

Joe M.

Re: [Repeater-Builder] OT: Radios and Coms in TV and Movies

[DCFluX]

Used to be the Diehard series was fans of Kenwood.

I recall Hanz Gruber using a TH-31, and the 'CB' in the limo looked
like a TM-221.

I think the handhelds in Die Hard 2 were TH-45ATs,and there was a
rather nice HF setup of the TS-940SAT with SM-230 and SP-940.

Also what is with Battlestar Galactica using D-104 'Chicken Chokers'?

Re: [Repeater-Builder] OT: Radios and Coms in TV and Movies

[MCH]

Two more comments. First, prove that the radios were even TURNED ON! 
Special effects are added post-production - things such as hearing the 
audio being received from a radio. That usually doesn't exist during 
filming short of someone off set reading the lines that would have been 
'received'.

Now, let's trash "Frequency" - a film that shows an unlicensed guy 
talking on a ham radio to his dead father via a 'wormhole in time' 
disguised as the northern lights. I can see a few problems with that 
scenario. Where do I start pointing out what isn't real in that movie???

And did Bandit really go 110 MPH in violation of the speed limit (which 
is ironic because the speedometer only showed 85 MPH... still illegal)

I could write several books about all the "illegal" things shown in 
movies, but I think the above examples demonstrate my point well 
enough... it's a movie, not a documentary!

Joe M.

wd8chl wrote:
> And they are illegal because they are ham rigs. And it's illegal to use 
> ham frequencies for a for-profit business, and movies are made for profit.

Re: [Repeater-Builder] OT: Radios and Coms in TV and Movies

[Mike Pugh]

wd8chl wrote:
> Gordon 'Yeti' wrote:
>   
>> Further question - are you sure it was the 41AT? And why were they illegal?
>> 
>
> Sorry-in hindsight they were 41A's, not the AT version...no DTMF pad.
> And they are illegal because they are ham rigs. And it's illegal to use 
> ham frequencies for a for-profit business, and movies are made for profit.
>   
Wait a minute? It's illegal to hold a ham radio as a prop in a movie??? ;-) Mike

RE: [Repeater-Builder] OT: Radios and Coms in TV and Movies

[Michael Ryan]

Next time you watch DIE HARD ( should be on tonight..it is on every night
just about ) pay attention to the scene when John  Mclean is in the mensroom
pulling glass out of his bare feet, and gets a call from Sgt. Al Powell (
the cop ). Mclean answers the call WITHOUT PICKING UP THE HT.  Nice work if
you can get it..  Also note the now GREEN T-shirt.  He was wearing a white
one in the earlier scenes.

-M

 

From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of STeve Andre'
Sent: Monday, February 02, 2009 4:39 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] OT: Radios and Coms in TV and Movies

 

On Monday 02 February 2009 16:37:48 wd8chl wrote:
> MCH wrote:
> > Illegal? They were foreign terrorists. How many foreign terrorists are
> > going to give a rat's rear about compliance with FCC regulations.
>
> Uhhh...Bruce Willis' character was using it, along with just about
> everyone using a handheld in the movie.
> And there was definitely places where you heard receive audio come back
> out of the radio.
>
> > The only part that was really far fetched is when John called the PD on
> > "channel 9" - implying that they were using CBs and that the PD actually
> > monitored channel 9. Oh, and that Al could talk to him on his police
> > radios.
>
> I still remember an episode of Hawaii 5-0 where they were sitting on a
> boat, and fired up the local AM radio station-on a Motorola PT200.

Um, I don't think anyone can tell where the audio came from. Yes, using
a ham HT is illegal *if it transmits*. But if they add the audio "from" the
HT later, thats ok. Stuff like that is done all the time. Sure, they could
have used ham frequencies, but they're used to the art of pretending--
they're movie makers. ;-)

--STeve Andre'
wb8wsf en82

 

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Re: [Repeater-Builder] OT: Radios and Coms in TV and Movies

[MCH]

As opposed to robbery not being illegal??? Remember that this is what 
the radios were used in conjunction with. I suspect most robbers don't 
get an FCC license. If they did, what would they put down as the 
purpose? "To coordinate activities and ensure employee safety while we 
rob vaults"?

This really seems like one of those "can't see the forest for the trees" 
  issues.

Additionally, who is to say they weren't modified to operate on one of 
the unused TV channels in the area? Still illegal, but no longer in the 
ham bands. The Feds use radios that look EXACTLY like FRS radios, but 
they are not FRS radios - they use Federal frequencies.

And again... it's just a MOVIE! It's not real!

Joe M.

wd8chl wrote:
> Sorry-in hindsight they were 41A's, not the AT version...no DTMF pad.
> And they are illegal because they are ham rigs. And it's illegal to use 
> ham frequencies for a for-profit business, and movies are made for profit.

Re: [Repeater-Builder] OT: Radios and Coms in TV and Movies

[STeve Andre']

On Monday 02 February 2009 16:37:48 wd8chl wrote:
> MCH wrote:
> > Illegal? They were foreign terrorists. How many foreign terrorists are
> > going to give a rat's rear about compliance with FCC regulations.
>
> Uhhh...Bruce Willis' character was using it, along with just about
> everyone using a handheld in the movie.
> And there was definitely places where you heard receive audio come back
> out of the radio.
>
> > The only part that was really far fetched is when John called the PD on
> > "channel 9" - implying that they were using CBs and that the PD actually
> > monitored channel 9. Oh, and that Al could talk to him on his police
> > radios.
>
> I still remember an episode of Hawaii 5-0 where  they were sitting on a
> boat, and fired up the local AM radio station-on a Motorola PT200.

Um, I don't think anyone can tell where the audio came from.  Yes, using
a ham HT is illegal *if it transmits*.  But if they add the audio "from" the
HT later, thats ok.  Stuff like that is done all the time.  Sure, they could
have used ham frequencies, but they're used to the art of pretending--
they're movie makers. ;-)

--STeve Andre'
wb8wsf  en82

Re: [Repeater-Builder] Re: OT: Radios and Coms in TV and Movies

[wd8chl]

MCH wrote:
> Wrong.
> 
> GMRS is "Class A CB" (FCC designation) while the 27 MHz band is "Class D 
> CB". I don't recall what classes B and C were offhand. 

One of them was a radio-control model service...planes, cars, etc.

Re: [Repeater-Builder] OT: Radios and Coms in TV and Movies

[wd8chl]

MCH wrote:
> Illegal? They were foreign terrorists. How many foreign terrorists are 
> going to give a rat's rear about compliance with FCC regulations.

Uhhh...Bruce Willis' character was using it, along with just about 
everyone using a handheld in the movie.
And there was definitely places where you heard receive audio come back 
out of the radio.

> The only part that was really far fetched is when John called the PD on 
> "channel 9" - implying that they were using CBs and that the PD actually 
> monitored channel 9. Oh, and that Al could talk to him on his police radios.

I still remember an episode of Hawaii 5-0 where  they were sitting on a 
boat, and fired up the local AM radio station-on a Motorola PT200.

Re: [Repeater-Builder] Re: Are you ready for narrowbanding?

[wd8chl]

n...@no6b.com wrote:
> At 1/16/2009 13:38, you wrote:
>> I absolutely do. There's a TON of non-narrowbandable equipment in use,
>> and we're not just talking about Micor/MastrII vintage equipment.
>> Maxtacs, MSF's, even early Quantars and MastrIII's. Pretty much anything
>> made before, I think, 1996-ish.
> 
> Why would Micors & Mastr IIs be non-narrowbandable?
> 
> http://www.com-spec.com/narrow.htm
> 
> Bob NO6B
> 
> 

1) There is a good likelihood that the mod will break type-acceptance.
2) Even if it doesn't, the cost to, say a Fire Dept or business to pay a 
shop to do the conversion is not worth it when you consider the age of 
the equipment.
3) There is also some question whether the transmitter can meet the 
adjacent channel noise specs required. Yeah, they're REALLY clean, but 
no manufacturer will certify something that old to meet the spec.

Re: [Repeater-Builder] Re: Are you ready for narrowbanding?

[wd8chl]

nj902 wrote:
> --- In Repeater-Builder@yahoogroups.com, wd8chl  wrote:
> 
> " I absolutely do. There's a TON of non-narrowbandable equipment in 
> use, and we're not just talking about Micor/MastrII vintage 
> equipment.  Maxtacs, MSF's, even early Quantars ..."
> 
> -
> 
> Don't include Quantar as being wideband only.  Quantar was 
> narrowband capable when introduced in 1992. 
> 
> The original product announcements, catalog sheets, specifications, 
> product planner and ordering guide for Quantar all document that 
> 12.5 channel spacing / 2.5 KHz deviation narrowband operation was a 
> standard feature. In addition, Quantar offered wideband and 
> narrowband Astro VSELP 9600 digital capability.
> 

Well, there sure is plenty of wideband only Quantars out there.
And Quantro's

Re: [Repeater-Builder] OT: Radios and Coms in TV and Movies

[wd8chl]

Gordon 'Yeti' wrote:
> Further question - are you sure it was the 41AT? And why were they illegal?

Sorry-in hindsight they were 41A's, not the AT version...no DTMF pad.
And they are illegal because they are ham rigs. And it's illegal to use 
ham frequencies for a for-profit business, and movies are made for profit.


> wd8chl wrote:
>> Eric Lemmon wrote:
>>> Albert,
>>>
>>> If you do find such a site, let me know! I was watching the Bruce Willis
>>> flick "Live Free or Die Hard" and noticed that every government 
>> agency and
>>> the DC Police used an ADI AR-147 2m mobile radio in their cars. I guess
>>> "interoperability" has finally taken hold, because every radio in 
>> the movie
>>> was displaying 144.330 MHz! Geez- you'd think that someone on the movie
>>> staff could do better than that...
>>>
>>> 73, Eric Lemmon WB6FLY
>>>
>> I'd sure like the FCC to come down on them-HARD. But they used Kenwood
>> TH-41AT's in the first Die-Hard, and nobody even noticed they were 
>> illegal.

[Repeater-Builder] Re: Am I getting through?

[skipp025]

Hi Mark, 

When I'm out on various  jobs I can't always quickly reply 
via Email... so you're welcome to also try the phone. 

I'll look for your latest set of pictures... but understand 
I receive over 200 emails each day. Sometimes I can't back 
fill to various ongoing small projects/help without a reminder 
or two, or three. 

cheers, 
skipp 

still skipp025 at yahoo.com 

> "Mark"  wrote:
> Skipp,
> I have sent a couple of private e-mails to you - with no 
> replies - regarding the Astron power supply problem you were 
> helping me with.  
> Just wondering if you've gotten them, or if they're being 
> filtered somehow?
> They had the photos you requested.
> To others on the list, I appreciate the bandwidth.
> Thanks, 
> Mark - N9WYS

[Repeater-Builder] Am I getting through?

[Mark]

Skipp,

I have sent a couple of private e-mails to you - with no replies - regarding
the Astron power supply problem you were helping me with.  
Just wondering if you've gotten them, or if they're being filtered somehow?
They had the photos you requested.

To others on the list, I appreciate the bandwidth.

Thanks, 
Mark - N9WYS

[Repeater-Builder] Re: Toko Filters for 902-928 MHz Available

[Jeff Kincaid W6JK]

All of the outstanding requests have been filled, and there are plenty 
of filters left.  Feedback suggests I was unnecessarily vague about the 
available supply.  Feel free to ask for as many as you want.  You won't 
be depriving someone else.  Finally, if you're having trouble reaching 
me, that's why I provided an alternate address in my original message 
(see below).  That account, unlike our radios, is unfiltered..

Jeff W6JK

Jeff Kincaid W6JK wrote:
> I have some Toko front end filters that, with a little ingenuity, 
> could be used in various radios for 902 MHz ham band conversions.  
> They're the 4DFA-915E-10 2 pole surface mount version of the filters 
> we've been using in the Maxtracs (which are 3 pole through hole 
> devices).  Here's a link to the spec sheet:
>
> http://www.toko.co.jp/products/pdf/filters_dielectric/4dfa_4dfb.pdf
>
> It seems to me that one or two of these on a daughter board could 
> replace the 3 pole unit.  Or you could just solder some left over 
> resistor leads to the main board and tack the filters to those leads.  
> If you'd like to try it, they're $5 for a pair, shipping included.  
> Email for payment details.  If a direct message doesn't get through, 
> try w...@arrl.net.
>
> Jeff W6JK
>

[Repeater-Builder] Re: MR4 receiver (trouble-shooting a receiver squelch circuit)

[skipp025]

> Merrill  wrote:
> I have a MR4 receiver that the squelch will not close 
> on any ideas .
> Merrill
> KG4IDD

Typical squelch operation for the MR4 type of receiver is to 
use no-signal present audio white noise to drive a switch 
circuit. 

Many receivers of the MR4, Hamtronics, VHF Engineering, Uniden, 
Radio Shack & GRE Scanners... yadda, yadda use one of the 
popular receiver chips like the MC-3359, MC-3357, MC & 
M ( meaning you add your chips number in place of...) 
I often find these same chips with house numbering placed 
into many amateur and commercial radios (GE Phoenix is one 
such commercial radio using one of the MC chips). 

There is an MR4 information sheet in/at the repeater builder 
web site... but I just had a look and it seems to be missing 
the receiver diagram. 

Inside a portion of the "integrated FM receiver subsection" chip, 
the white noise normally present/heard when you open a receiver 
squelch is sampled & separated in an adjacent section/stage 
(inside the chip). The audio white noise is then amplified to 
limiting and routed to a simple rectifier stage where the out 
is a changing DC voltage (based on how much white (audio) noise 
was driven into the rectifier circuit). 

Naturally I just read where the MR4 does not use the internal 
chip squelch circuit... but the mentioned RB web page 
information does indicate receiver board diodes CR5 & CR6 are 
the squelch rectifiers. Regardless of the circuit location 
(internal or external to the chip) the squelch operation 
should be pretty much the same for many receiver sections. 

Separated, amplified, limited, (sometimes frequency range 
selected or optimized) no-signal audio is rectified (changed 
to DC) and generates a DC voltage value set up to toggle an 
internal (to the chip) or external electronic switch, which is 
set up to mute/un-mute the audio path to your speaker amplifier 
section. This location is also where many receivers toggle 
the COR/COS output logic to your repeater controller (external 
devices). 

Normally... using the chip internal squelch circuit. The 
following does not directly apply to your circuit. 
Some basic testing... with a scope is easy (because you can 
quickly see the audio noise displayed) or a regular Multi 
(volt meter) set up to read low value AC voltage. This type 
of testing is a place where the previously mentioned Radio 
Shack Mini Test Amplifier would be very helpful (actually 
in some cases would work in place of the scope and multi meter. 

http://www.radioshack.com/product/index.jsp?productId=2062620 

(one of the best spent $14.95 test equipment items you'll 
ever buy)

The amount of audio noise fed back into the chip is often 
routed and controlled by the squelch pot. So a quick test 
of the signal present on the squelch pot... one terminal might 
be ground, the opposite end the inbound audio noise signal 
and the center wiper the return back to the chip.  

Do you see an AC voltage on the squelch pot "high side"? And 
of course is that AC voltage present and vary with control 
rotation on/from the center wiper? 

If so... you move onto the section of the receiver chip after 
the AC audio noise is rectified (changed to DC) to find the 
section where the resultant DC voltage changes with rotation 
of the squelch pot and on frequency received signal input. 
At some circuit selected value the logic circuits controlled 
by the DC switch voltage should change. One portion of the 
control circuit should be set up to mute the audio amplifier. 

   

I had typed all the above in before viewing the circuit operation 
description text, which states your circuit uses the rectified 
DC Voltage (level) on the squelch pot to set a level driving 
transistors Q15 and Q16. 

So... using the circuit description and hopefully an available 
diagram... it would not be a huge pain to sort out your 
squelch problem... The first step would be measure the DC voltage 
on the squelch pot and see if it varies with signal input. 

www.repeater-builder.com/kendecom/kendecom.pdf 

If we can find an easy web copy of the MR4 Diagram... the 
above described can be better detailed for you. 

cheers, 
s. 

Re: [Repeater-Builder] Manual for E.F. Johnson CR-1010 Repeater

[Mike Morris WA6ILQ]

At 08:08 PM 02/01/09, you wrote:


I was not able to upload this to the site due to its size, 13.16 Meg
If someone wants this file, please go to the link below, I got this
information from an E.F. Johnson Rep.
If you can get it to upload here, please do.

http://www.savefile.com/files/1933552

Thanks,
Danny


That file is identical to the one on www.repeater-builder.com
on the Johnson page, only R-B's copy is the leaner 8.2 Meg
version (exact same contents).

Mike WA6ILQ