In a previous life I managed the communications for a state police agency. We
used 45 MHz for our main system and had forty some odd tower sites, almost all
running DB212-3 antennas.
Two of the sites were on 1000+ towers and used a single DB-212 element due to
the large tower face and the
for transmit and one for receive. I don't know
how much isolation he'll need, but he might just get away without a duplexer
if there's enough tower.
Chuck
WB2EDV
- Original Message -
From: Doug Rehman d...@k4ac.com mailto:doug%40k4ac.com
To: Repeater-Builder@yahoogroups.com
mailto:Repeater
When I first started, the existing radios were GE Mastr II’s. They actually
had two receiver decks to cover the 800 KHz or so of our channel spread.
When the system was finally phased out, we were using Motorola Maratracs
with the handheld controllers. I had mine programmed with six meter channels
My GROL is in the database, although the grant date is incorrect. The
database shows a grant date in 1988, but it was either 1983 or 1984 when I
actually received it.
I wonder if it varies depending on the office of issue? I took the test in
Tampa.
Doug
K4AC
While I don't have a whole lot of 6m repeater experience, I've got 10 years
of public safety 45 MHz experience. About 20 years ago, I had a 45 MHz
public safety system on a platform at 1450'. The person who originally
installed it used a DB Products vertical mounted to the platform rail- the
I have an Icom FR3000-2 VHF repeater that was shipped to me some time ago.
It was working fine before it was shipped.
When I hooked it up, the display was not working. I opened the case and
found that two of the flex cables between the logic board and the front
display had come loose. There is a
Can anyone advise if there are any 2 meter P25 repeaters in Georgia?
Thanks,
Doug
K4AC
The Telewave catalog does a poor job of describing the antenna; take a look
on the write up on page 5 of this PDF:
http://www.talleycom.com/PDF/%20TSQ2_09.pdf
The picture there shows that it is indeed a folded dipole.
Unfortunately the antenna is too heavy for my application- 7 pounds for 6dB
Looking at some DB Products fiberglass radome antennas, they all have a
metal protrusion on the top cap; it looks like bronze perhaps. I presume
that it is some form of lightning mitigation device. Is this just a piece of
metal in the cap, unattached to the internal antenna element?
I'm curious
strike.
Chuck
WB2EDV
- Original Message -
From: Doug Rehman d...@k4ac.com mailto:doug%40k4ac.com
To: Repeater-Builder@yahoogroups.com
mailto:Repeater-Builder%40yahoogroups.com
Sent: Monday, November 02, 2009 5:45 PM
Subject: [Repeater-Builder] Lightning Rod (Bolt)?
Looking at some DB
to the tip of the antenna for lightning. I suspect it might survive
a direct hit. To look at it, you'd think is was just one more fiberglass
collinear. I'm pretty sure it's available in both 800 and 900, but it won't
be cheap.
Chuck
WB2EDV
- Original Message -
From: Doug Rehman mailto:d
Mark:
I could probably come up with a used 9dB DB Products antenna, but for this
application, weight is a MAJOR factor. A DB-809 is around 25 pounds and a
DB-589 is still about 11 pounds. The 5dB gain Maxrad MFB9155 is less than 2
pounds.
This is going on top of a 24' mast that is on top
P3 Kill A Watt Electricity Load Meter and Monitor $19 from Newegg:
http://www.newegg.com/Product/Product.aspx?Item=N82E16882715001
Free Shipping after Coupon Code: EMCLXNX64 (Exp 10/5).
Doug
K4AC
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On
We have an Icom repeater that we are going to install into our ARES comm.
trailer. (I believe the output power of the repeater is around 25 watts.) In
Florida, there's a 1 meg split emergency repeater pair that we plan to use.
(Since the repeater will only be used on some occasional trailer
It was indeed the Telewave ANT-150D that I had seen; I just found the ad in
the August QST.
Unfortunately, the Telewave is out of the budget for this project though.
Is anyone familiar with the Antenex YDA1364? (4 dipole array)
http://www.ameradio.com/product/9449/description.html Has
I remember seeing a vertical dipole from one on the amateur antenna
manufacturers that was designed to bolt onto your mast or tower leg. I think
it might have come in a kit of 2 or 4.
I thought it was Cushcraft, but I couldn't find it. Does anyone have any
idea what antenna I thought I saw?
Thanks for the info on Cushcraft, although I thought I'd run across the
antenna I'm remembering within the last couple of months (current
production).
I'm looking for something that I can mount on the mast of my home tower,
interwoven between other antennas on the mast. (Obviously with
I'm looking for any information on a Selectone ST-815 mobile DTMF decoder.
It's a small box, 2.75x1.5x2, with a monitor/reset button and a horn button
on the front. I don't see any info on the Selectone/Com-Spec website.
I need to know what the pin out on the back is and how it is programmed.
Does anyone have a relatively close (+/- 10%) estimate of the weight of a
Mastr II repeater (the radio/control shelf/100 watt PA and the GE power
supply only- no case/duplexer)?
Thanks,
Doug
K4AC
It sounds like the down looking radar that we have been commonly
experiencing for decades in Florida. It is operated from an aircraft for
spotting low flying aircraft that are below the beam of ground based radar.
Down here, the primary target is smuggling aircraft and border security.
Doug
The Russian Federation is a member of CEPT (European Conference of Postal and
Telecommunications Administrations) which has reciprocal operating authority
with the US. The CEPT document outlining operating
(http://www.erodocdb.dk/docs/doc98/official/pdf/TR6101.PDF) shows that the call
sign
www.hamradioinsurance.com
After doing a little research on eHam reviews (and consulting with a good
friend who is an independent insurance agent), the Lake Amateur Radio
Association (www.k4fc.org) went with the $5K insurance plan. I also got the
same plan personally.
Doug
K4AC
From:
Dan:
I'm in the process of putting one of those on the air now. They were/are
referred to as GE-Net 900 stations. As far as I'm aware, there are only a
handful of the stations in amateur service.
The GETC (General Electric Trunking Controller) is how the station's
frequency is set (among
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