John, here's a more subtle lesson on repeaters, and it has nothing to do with
hardware...
If you dial the power back 1 dB, your PA may be much happier.
If you simultaneously change the courtesy beep to be 10% faster, users will ask
you what's changed on the repeater. Tell them you've increased
Brett,
How did you determine it's an IM product?
What repeater/controller combination are you using? I'd try powering down the
controller and manually keying the transmitter. If that solves it, it could be
the controller's reference oscillator or divider outputs leaking onto the PTT
line or
Gordon, something worth trying might be low-band.
About 20 years ago, I lived in an area where hams did course communications for
rally events in very mountainous terrain. I remember experimenting one night
about 2am with my partner at the other end of a heavily wooded course, about 12
miles
Don, this is a natural response, or lack thereof. If you ask, will I have this
problem, and nobody else has had it, that doesn't mean they can guarantee YOU
won't have it, so they refrain from commenting.
I learned a lot from my experience with one outdoor, rooftop repeater I built.
I was
Wow...sounds like somehow, moisture was released inside the building.
If it's 20ºF outside the building, and 22ºF inside the building, it's hard to
imagine how frost could form on the equipment, since the relative humidity
indors would have to be lower, unless...there was water forced up
Noise blankers also target broadband noise. If some computer is dumping right
on your intended receive frequency, you're out of luck.
73,
Paul, AE4KR
- Original Message -
From: Chuck Kelsey
To: Repeater-Builder@yahoogroups.com
Sent: Monday, August 30, 2010 3:10 PM
Subject:
I'm working on a UHF ham repeater project for installation some time next year,
and was getting set to build one based on 35-watt Mitreks. I've just been
offered a 100-watt Mastr II UHF repeater, complete including the cabinet, just
taken out of service in a switch to narrow-band equipment.
I
Understood. IIRC, the MII could use a homebrew supply which provides ~13.6 VDC,
so long as the voltage always stays high enough to keep the linear regulator on
the 10V card in its happy zone, right?
- Original Message -
From: Jeff DePolo
To: Repeater-Builder@yahoogroups.com
Kevin, I'll make a note and get back to you if we move forward, thanks! Is the
base PA rated for continuous duty? - Paul, AE4KR
- Original Message -
From: Kevin King
To: Repeater-Builder@yahoogroups.com
Sent: Monday, August 30, 2010 4:49 PM
Subject: RE: [Repeater-Builder]
Nate,
I already know I'd love to have a MII, and the bulk won't be an issue getting
it home or storing it, but the proposed site is on a rooftop. That part could
get interesting. I may need to devise a truss...and something to hoist the
repeater, too! (Rimshot.)
This unit is very unlikely to
Chris,
There aren't many ways around the laws of physics. If you can't get adequate
physical separation, and can't afford a duplexer...perhaps you just can't
afford to operate a repeater.
Can you gather enough interested users, and get everyone to chip in for a
duplexer? If not, maybe your
And yet, you're the one who hit reply and kept it going...
73,
Paul, AE4KR
- Original Message -
From: Chris Robinson
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, August 26, 2010 9:31 AM
Subject: Re: [Repeater-Builder] Re: Fw: DON'T BUY IT AND DON'T USE IT
I once worked in the aftermarket autosound industry, where springy, one-sided
blind nuts were used to mount speakers in places you couldn't see. They were
supposed to catch on the lip of the speaker frame to keep from spinning, but it
was easy to misalign them when you couldn't see what you
Ahhh...gotta love Fridays!
Yes...there is the Jesus nut on a helicopter, and a Jesus bolt in the
rotorhead of a gyroplane, and fixed-wing pilots like to chide us about both. I
like to ask them how things will go if the bolt holding the wing strut on a
Cessna 172 lets go. Then, I remind them
One company supplying power factor correction capacitors promotes their use on
inductive loads only, where it might be a legitimate claim:
http://www.greenenergycube.com/index.php?support-documentation
73,
Paul, AE4KR
- Original Message -
From: Chuck Kelsey
To:
...but it sure gives THEM a warm feeling!
73,
Paul, AE4KR
- Original Message -
From: Jeff DePolo
To: Repeater-Builder@yahoogroups.com
Sent: Monday, July 05, 2010 8:08 PM
Subject: RE: [Repeater-Builder] MASTR II LOW BAND TUNING
I took a quick look at them, and what stands
Don,
There are no Shift, Alt or Ctrl keys needed for the capture. With the Map
displayed on the screen, simply press [PrintScreen] unshifted. This puts the
image on the Windows clipboard. Now...
(1) Open MS Paint. (Start, All Programs, Accessories, Paint)
(2) [Ctrl]+[V] pastes the image into
Every ten minutes, it speaks in code. Hmm...maybe still works! ;^)
- Original Message -
From: and...@msu.edu
To: Repeater-Builder@yahoogroups.com
Sent: Monday, June 28, 2010 9:52 AM
Subject: RE: [Repeater-Builder] Re: Harmful Taxing
Quoting Yahoo ya...@icsradio.com:
I'm not seeing any of these messages, so they apparently aren't coming through
the list.
73,
Paul, AE4KR
- Original Message -
From: Don Kupferschmidt
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, May 30, 2010 11:45 AM
Subject: [Repeater-Builder] OT:
Why, of course, it's what's found on the other side of the combiner from the
MR2000. ;^)
- Original Message -
From: Mike Morris WA6ILQ
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, May 16, 2010 2:32 PM
Subject: Re: [Repeater-Builder] Re: mrs2000
What's an
Guys,
I'm considering the relative value of various coax protection schemes for a
planned UHF ham repeater. I know PolyPhaser is the industry standard, but I
also know they don't last forever, and can cause problems with spurious
emissions in some failure modes.
A simple shorted quarter-wave
Nate,
I appreciate the thoughts. I've been blessed to be around some really nice
broadcast sites, and one of the telco microwave sites, during my career, and
I'm not sure which is worse...having a site attacked by the new engineers who
only know card-swapping, having it attacked by bean
Oh, the irony...If bandwidth is an issue for you, suggest not sending the same
post twice! - 73, Paul, AE4KR
- Original Message -
From: dennuszabawa
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, May 04, 2010 5:34 AM
Subject: [Repeater-Builder] @#@*$%*((!!
OK,
Well sure...if you take the shortcut! ;^)
I gotta remember not to post after 1am...
- Original Message -
From: John J. Riddell
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, April 27, 2010 3:52 AM
Subject: Re: [Repeater-Builder] Direct Strike Lightning Detector
After a few years on the sidelines, it looks as if I'm going to be jumping back
into repeater ownership. I have a few nice pieces left from my last adventure,
including a TX/RX duplexer and a loaded S-COM 7K, but I'm pondering choices in
RF decks. This will be a local UHF machine designated as
Tim,
My plan at this point is to convert them to full duplex, so I can use the
second Mitrek to prepare a complete, plug-in, standby set of RF decks. The mods
look very straightforward, but I was wondering if there were any gremlins
people discovered.
Your heatsink approach, however, is
4/26/2010, Paul Plack wrote:
Your heatsink approach, however, is exactly what I was talking about. I
have several very large heatsinks originally designed for use with big SCR
switching circuits which look to be more than generous for a 30w PA at 100%
duty cycle.
Remember folks
@yahoogroups.com
Sent: Monday, April 26, 2010 12:26 PM
Subject: Re: [Repeater-Builder] Mitreks as UHF Repeaters?
On Mon, 26 Apr 2010, Paul Plack wrote:
Remember, the 100W Mitrek had a heatsink that was rated for 35W and used
the duty cycle to keep things cool. If you do a case swap from
and some simple homebrew transistor and/or relay
logic tied into your controller.
--- Jeff WN3A
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Paul Plack
Sent: Monday, April 26, 2010 1:49 PM
To: Repeater
I'd need in my application.
73,
Paul, AE4KR
- Original Message -
From: Ken Arck
To: Repeater-Builder@yahoogroups.com
Sent: Monday, April 26, 2010 1:09 PM
Subject: Re: [Repeater-Builder] Mitreks as UHF Repeaters?
At 11:47 AM 4/26/2010, Paul Plack wrote:
Ken
Larry, are any of your cabinets outdoor types? I'm in Salt Lake City, but have
relatives near you who could pick up store, and might be interested. - Paul,
AE4KR
- Original Message -
From: larryjspamme...@teleport.com
To: Repeater-Builder@yahoogroups.com
Sent: Monday, April
spurrs and crap when I tried setting the TX
power too low. Its happiest at 50-75% of its rated power.
Tom
W9SRV
--- On Mon, 4/26/10, Paul Plack pl...@xmission.com wrote:
From: Paul Plack pl...@xmission.com
Subject: Re: [Repeater-Builder] Mitreks
Jesse,
A radio engineer in Atlanta years ago told me a neat trick he said allows
confirming a strike, and estimating the current it produced. It involves
rexcording an audio tone on a piece of magnetic tape several feet long, sealing
it in a weatherproof, non-conductive tube, and positioning
Don,
The ARRL would be a good place to start on this, but it probably will have
nothing to do with the FCC. PRB-1 requires reasonable accommodation by locals.
It doesn't give hams carte blanche. If the family didn't dot the i's and cross
the T's with the locals, which in many cases requires
Chuck,
I actually got just the opposite intent. The mention of his handicap and
community contribution through amateur radio paint a clear, sympathetic
position. The reporter's job is to present both sides of the story. Accurately
reporting the position of an opposing neighbor is required for
Old-fashioned?
If you take being fashionable out of the argument, analog NBFM has some
advantages which may not be appreciated until they're gone, particularly in
emergency ops.
Interoperability has been covered already, but there are some more subtle
advantages to analog. If you have a
Yikes! Pardon me while I go get a tetanus shot!
73,
Paul, AE4KR
- Original Message -
From: Mike Morris WA6ILQ
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, March 31, 2010 12:57 AM
Subject: [Repeater-Builder] Fwd: access gate accident
Look at all four pictures to
of Pave Paws.
73,
Paul, AE4KR
- Original Message -
From: Paul Plack
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, March 30, 2010 8:27 PM
Subject: [Repeater-Builder] 449 MHz Wind Profiler Radar?
Did I miss this in an earlier thread, or is this a surprise?
Paul
I got the First Phone about the same time, and about the same age. I was a
budding DJ, and there were AM stations with complex directional arrays which
would only hire night DJs with the First, because they'd be working alone in
the building and were required to have a First at the control
Did I miss this in an earlier thread, or is this a surprise?
Paul, AE4KR
Honeywell Wins Contract to Build 449 MHz Wind Profiler
PHOENIX, March 29, 2010 -- Honeywell (NYSE: HON) today announced that it has
been awarded a $49 million contract
Mike,
As others have noted, receiver selectivity and transmitter cleanliness will
determine how far apart the sites need to be.
All transmitters in the system must be ID'd. Various schemes are possible, and
the FCC is not going to get so specific here so as to stifle technical
innovation.
They're being intercepted and screened by ebay before posting.
- Original Message -
From: kc8gpd
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, March 17, 2010 1:06 PM
Subject: [Repeater-Builder] Test
seems to be a long delay between posting messages and them
Russ, you may have to spend more on whatever you're using for power than you're
saving with those radios, as they pull 1.6 amps combined even on standby
receive. Also, develop a plan to keep the transmit radio's heatsink cooled,
even in low power mode. But plunging ahead...
Your controller can
Russ, what is your plan for duplexing? Those radios won't play well a few feet
and 600 kHz apart. - 73, Paul AE4KR
- Original Message -
From: Russell Trippy
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, March 16, 2010 2:18 AM
Subject: Re: [Repeater-Builder] cor
How do these transmitters play at crowded sites? I've heard some accounts of
broadband noise problems for other tenants when high-power Glenayre equipment
went in...
73,
Paul, AE4KR
- Original Message -
From: Joe
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, March 14,
OK, question...
If you put a cable which is 1/4-wavelength at VHF between the T and the UHF
cavity, it's 3/4-wavelength at UHF. Since any odd multiple of a quarter
wavelength will invert the impedance, what will this really accomplish on the
UHF cavity side?
The dual-band diplexers are
Large building, yes...but you wouldn't have to pay extra to heat it. ;^)
- Original Message -
From: skipp025
To: Repeater-Builder@yahoogroups.com
Sent: Saturday, March 06, 2010 6:45 PM
Subject: [Repeater-Builder] Re: Someone still loves a Motrac - Low Band
Even...
Is
Hmmm...
What if someone came up with a board which could be retrofitted to a Spectra to
give it ham-style programmability via front-panel controlsm, or even a separate
control head? It wouldn't be interesting to the big manufacturers, but then,
neither was the GLB Channelizer.
73,
Paul, AE4KR
Tony,
What's to back up at a site already supported by both solar and wind? Is
there a temp below which the PV panels won't produce or the wind turbine won't
turn? Deep snow covering the PV panels?
I guess my preference, for a number of reasons, would be to have a way to
remotely invoke an
, Tuning it until it sounds best is not the way to go. The LO
frequency for the MASTR-II VHF will be either + or - 11.2 MHz from the receive
frequency depending on the whether high side injection was specified when
ordering the crystal.
On Wed, Feb 17, 2010 at 3:52 PM, Paul Plack pl
There used to be a great little company in the Toronto area called Lesmith that
did a nice job with crystals at prices below ICM's. They morphed a couple times
and changed names, but I think they're out of the crystal biz now. Anyone have
an update?
73,
Paul, AE4KR
- Original Message
Don, the copy of the statute you quoted specifically exempts communications
transmitted ...for the use of the general public, including Amber Alerts.
What I want to know is, what if you set up across the state line with a yagi,
and put it on the web from there? Your QTH would be just the place
Forgive me if I'm going where no one wants to go, but isn't there a point in
the decline of a club at which the nuclear option becomes the best choice?
Guys, the repeater's been a fun ride for 40 years, but we're down to three
members, and no longer have enough in the treasury to keep the old
Greg, note that while the original topic may have run its course, and has been
a bit of a groaner, this list is not intended by the owners to be limited to
ham repeater topics. Much of what is here by deals with comercial land moble
radio repeaters.
73,
Paul, AE4KR
- Original Message
John,
I'm not aware of any FRS radios which will operate split-frequency, so not sure
how those little handhelds would be able to use a repeater.
There are some FRS handhelds which will do higher power on the channels shared
with GMRS, perhaps making simplex work better.
Our prayers are with
My coordinator says no pairs are officially available right now, but if I
marry his sister, he'll see what he can do...
Seriously, CB is more than 400 kHz wide, so splits wider than the 100 kHz used
on 10m would be possible. If amplitude modulation is done cleanly, sidebands
could be a little
The length of a commercial base-loaded mobile whip is nearly a full electrical
1/4-wave because the coil is there primarily to provide a convenient way to
adjust impedance and run at DC ground, and leaving as much whip length as
possible helps performance. If you build your own, and saving
Um...when I click the link it opens a page with photos and a caption which says:
--
RCA Corportation
Model MFA02-AC21B
FCC XMTR Data CT2020
FCC RCVR Data CR2003
2 channel crystal radio
VHF - currently crystal in the 159.xxx range
UPS crooks? I'll say!
A few years ago, I ordered the 220 MHz module for my Yaesu 6xx tri-bander. When
it got here, I found UPS had stolen two MHz off the bottom of the band!
;^)
Paul, AE4KR
- Original Message -
From: va...@securenet.net
To: Repeater-Builder@yahoogroups.com
Can you not get the cooperation of the operators of the repeaters you want to
link? Without that, the technical issues will be the least of your problems. If
they approve, the PL solution can actually work quite well.
The decision to be part of a linked system belongs to the licensee of each
Has Yahoo been made aware?
- Original Message -
From: skipp025
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, January 17, 2010 6:27 PM
Subject: [Repeater-Builder] Re: Caution to Group Members Trojan from Yahoo
Banner Advertisments
I actually believe I received the
Given the fact that a voter still requires an outboard repeater controller for
other needed functions, and is designed to select a receiver based on S/N ratio
rather than a preset hierarchy, would it really be a good choice for this
application?
A new LDG voter lists for $319 and still
Oh, I dunno...if you're also paying the heat bill, running that 4-400 could be
a wash!
73,
Paul, AE4KR
- Original Message -
From: skipp025
To: Repeater-Builder@yahoogroups.com
Sent: Monday, December 28, 2009 9:03 AM
Subject: [Repeater-Builder] Re: 6 Meter RF Amplifier (PA)
...not to mention reducing the odds of having a bear problem!
As for the trash cans, anticipating human behavior can be interesting. Years
ago, one of the big ham repeater sites in the southeast US actually had a few
commercial tenants, which is generally a nice arrangement financially. The
Bingo. My solar powered repeater developed charging issues, and when I went to
check, it was due to corrosion on the homebrew charge controller's PC board.
73,
Paul, AE4KR
- Original Message -
From: Mark
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, December 01, 2009
Guys, please...the only sanctioned religious discussion on this board is
Motorola vs GE.
73,
Paul, AE4KR
I find nothing in Part 97 which would preclude ACSSB, as it appears to meet the
definition of phone, but I do recall some debate at the time on whether the
audio frequency inversion scheme/pilot tone was a form of
scrambling/encryption, which would have made it illegal on the ham bands. The
Sounds to me like having a friend in the shop at PGE will come in handy when
it's time to build short-hop links or a portable event repeater! - 73, Paul
AE4KR
- Original Message -
From: skipp025
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, November 11, 2009 11:02 AM
I recall the repeaters of the ACC era, how the overused bells and whistles were
viewed as advanced, and how so many repeaters coast-to-coast had no
individual personalities, only those same canned TI voices and LOUD three-tone
courtesy beeps. I also recall how funny it was to hear the male and
Can you receive through a circulator without heavy losses? I've never tried
it...
- Original Message -
From: David
To: Repeater-Builder@yahoogroups.com
Sent: Monday, November 02, 2009 1:31 PM
Subject: [Repeater-Builder] Re: Weird Interference between APRS and 2-M
repeater
repeater help needed
I do it all the time in a test jig to set up mobile
vehicle repeaters. Helps protect the non power term
ports of a Service Monitor.
You'd be surprised how much you can hear through it...
s.
Paul Plack pl...@... wrote:
Can you receive through
Mike,
If it moves around based on time of day, my first guess is a PA that's gone
bad, and has a parasitic that's temperature-related.
If you've tracked an individual spur drifting 70 kHz up the band during a
single transmission, this is not some (intentional) oscillator drifting, but
some
Mike, the interference is clearly not caused by your own rusty roof, and is
both eggregious and easily documented. I know we hate to go there unless it's a
last resort, but I'll bet the FCC is almost as tired of non-compliant pager
systems as we are. Perhaps that technique would prove
You guys have talked past each other slightly...
Kevin, if he's not using straight discriminator audio into the controller, but
picking off de-emph audio downstream from the Kendecom squelch gate, there will
be times he has COS from the Micor module but no audio reaching the controller.
John, I experimented with that once, and in some situations, it's the most
elegant way to derive a COS-like logic signal from an audio stream that doesn't
carry imbedded switching info. A fast, stable VOX gate listening to the output
of a squelched radio receiver can provide a very useful
Tom, I'm also a very satisfied Astron user. People whine, but there's nothing
like them at their price point.
My comment wasn't about the esthetics or hipness of the Yahoo address, but its
functionality. They work OK most of the time, but so much illicit stuff is done
through disposable e-mail
LOL! Nothing says we're reputable and here to stay like a company e-mail
address at yahoo.com! Nothing against the power supplies, miy 1995-vintage RS35
still works fine, but sheesh!
73, Paul AE4KR
- Original Message -
From: WA Brown
To: Repeater-Builder@yahoogroups.com
On the transmitter page, ACS says, all our products are rated for continuous
commercial duty.
Then, a little lower, 90% DUTY CYCLE
Do they even know?
73,
Paul, AE4KR
- Original Message -
From: skipp025
To: Repeater-Builder@yahoogroups.com
Sent: Monday, October 19, 2009 9:37
Now Skipp, they're obviously protecting some very impressive technology. Look
down the specs...their high-power 2m transmitter does 30 watts out while
drawing only 500 mA at 24V. I don't care where you live...250% efficiency,
including all stages, is impressive!
;^)
73,
Paul, AE4KR
-
Randy, it's pretty common these days for a transceiver in a valley to have much
higher useful sensitivity than a receiver at a high repeater site, because your
noise floor may be much lower, and the front end of the repeater's receiver may
require much higher selectivity.
It is also possible
Eric, right off, I'll challenge the assumption that you need 25 miles
separation. You'll have too many users who can her the output but not get in,
and vice versa. A mile or two should be plenty.
Linking via the internet can be done, but making a ham repeater reliant on two
internet
Peter,
I haven't seen this mentioned, but perhaps you could do a split-site repeater,
with a 2m rcvr, basic controller, low-power UHF transmitter and small solar
panel ready to hang on a utility pole somewhere, then park the SUV with a UHF
link receiver and 2m transmitter a half-mile away but
If you just can't get access to a VNA and someone who knows how to use it,
having a 50-ohm attenuator on hand to put between the duplexer and the handheld
or mobile rig can help a great deal. They can be found with BNC connectors on
hamfest junk tables, (make sure they're 50 ohms,) or
Mike, great primers, all. Only squawk I'd have is, in the doesn't fix
anything article, where the reader is referred to Historical and Technical
Overview, make the title a link to the other article.
I've also abandoned underlining text for emphasis in HTML documents, since most
new visitors
Assuming manufacturers will limit the capabilities of their equipment to the
letter of the Part 97 law has proven unreliable.
Manufacturers of imported dual-band mobiles provided capability for aux
operation using 2m as the control side years before it was legal, and lots of
ACC-controlled 2m
I heard a similar problem with an ARES net in Oregon. One of the county EOC's
had installed a high rooftop antenna for the hams, and could be worked on
simplex for many miles, but into the main ARES 2m repeater it sounded as you
described, to the point it was unintelligible. It was fine into
Lots of consumer TV receivers use vertical, telescopic whips.
- Original Message -
From: larynl2
To: Repeater-Builder@yahoogroups.com
Sent: Monday, August 24, 2009 4:23 PM
Subject: Re: [Repeater-Builder] Diversity FM reception
The local channel 8 analog station here had
John, how's this for an experiment...
Configure a repeater with two receivers, one built for +/- 5 kHz deviation, the
other for +/- 15, feed them from a splitter, use audio from the narrow one, but
allow a DTMF command to select the wider receiver's COS when conditions
warrant. (Obviously,
When I lived in Atlanta in the 80's I was a few miles from the local 10m
repeater, and quickly noticed that distant stations which were fading on the
repeater input had climbing signal strength at my location if I switched to the
input. About the time they started getting ratty at my place, I
Perhaps one the remaining contributions we could make as amateurs would be
working with DSP to combine all these attributes in a standalone uP module. It
would be great to have an adaptive squelch board for retrofit into repeaters
which could account for multipath, propagation conditions, noise
Artie, not sure I can picture the block diagram, but it's common to use a
cavity or attenuator between the preamp and the receiver front end to avoid
overload.
73,
Paul, AE4KR
- Original Message -
From: k2aau
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, August 18,
--
Received: Sat, 15 Aug 2009 10:36:11 AM PDT
From: Paul Plack pl...@xmission.com
In my years in broadcast radio, I often saw program directors and general
managers who wanted engineering to alter equipment to accommodate some prima
donna morning talent too lazy to exercise proper mic
It's no more closed than a repeater with CTCSS or even a tight squelch, but
what a pain in the butt for users with equipment set properly! You hear the
repeater drop, wait for the beep, and then are doubling with someone? That's a
solution?
This sounds like the work of a passive-aggressive
If you mount the array on a non-conductive pole, won't you then have to model
the effects of interaction with the outside of the coax shields of the feedline
harness that would normally be insignificant when attached to the side of a
conductive pole?
- Original Message -
From: AJ
Skipp, I generally agree, but it's not the fault of the user's voice. It's a
lack of training in mic technique, sometimes combined with audio circuits that
aren't easily user-accessible. Compression on the repeater eliminate's the
user's need to get things right at the source, and one day, he's
Walter,
Part 15 covers unlicensed operation. As a ham, you're licensed under the terms
of Part 97, which has specific rules for emissions types and purity. (97.305
and 97.307 in particular.)
If you buy a commercial product not already certified to comply, and were ever
accused of, say,
I wonder if this is a battery issue, possibly affecting any user, or simply a
handheld that was supposed to be rated for use in explosive environments which
turns out not to meet spec.
In any event, a very funny recall notice!
73,
Paul, AE4KR
- Original Message -
From: ks4ec
But then...how did they make it through quality assurance? Oh, wait...
- Original Message -
From: DCFluX
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, August 06, 2009 3:32 PM
Subject: Re: [Repeater-Builder] OT: Suicom 2 way radio Transceiver recall -
Ouch!
If
Allen,
I'll echo the comments of those who've said 2m is not the best choice for a
portable repeater, due to the required close frequency spacing. A 440 MHz
repeater solves a number of problems regarding duplex operation.
I built a solar-powered repeater a few years ago, and had to operate it
Perhaps movie theaters could also be built in old Kroger stores?
73,
Paul, AE4KR
- Original Message -
From: Butch Kanvick
To: repeater-builder@yahoogroups.com
Sent: Thursday, July 23, 2009 8:28 PM
Subject: RE: [Repeater-Builder] Need to pay someone to properly install
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