I
think you would be much better off getting a folded dipole antenna like
a DB224 for VHF or a DB411 for UHF. You can set the dipoles to favor
the town by putting 3 facing the town with one left facing the opposite
direction so the back door isn't too badly affected.
Dan N8DJP
Re: antenna
Sound like a PURC unit.
You have exciter at 450 mw out that goes into a tripler/low level amp that
gives 2W out, that goes into the 75 watt amp which in turn drives the last
stage. Not bing familiar with the model number, I would guesstimate the final
out is around 350 watts.
Dan N8DJP
One thing was missed regarding cable lengths. The loops in the cans are part of
the equation for figuring the 1/4 wave length. I've seen that discussed here
many times in postings related to inter-cable lengths on duplexers. But the 1/4
wave length issue only applies to the inter-cabling
Actually, Gary, you are 180 degrees out. On a pass cavity, off frequency
signals see a very high impedence path, an open not a short. If your version
were true you could never use pass cans as a duplexer since both sets of cans
together would show a short to EVERYTHING.
The T connector is
If it is the double sided key then its a 2553. If the cabinet has an external
handle that the lock is in its a CH751.
For some reason Motherola used a different key on the 6' cabinets than on the
shorter (Compa) cabinets.
Unfortunately I don't have a spare, but they are made by Chicago Lock Co.
What seems to be getting overlooked by everyone including the Illinois
legislature is that they have NO authority to pass any law governing how the
airwaves are used.
The communications act gives SOLE jurisdiction over the airwaves to the FCC,
period.
If they pass this law and then try to
Bill, thanks for the tip, however the repeater is a UHF. I don't see anything
on Comprod's site showing a UHF with a reflector screen.
I guess I will just have to improvise! I was looking to see if any other
members had done such a thing before so I didn't have to re-invent the wheel so
to
Bill,
The antenna will be a building-top installation. The only thing near field is a
couple of VHF fiberglas omni sticks that are over 6' away. Interaction with
anything else will be insignificant.
Thanks
Dan N8DJP
Re: Antenna Pattern Question
Posted by: William Becks
screen to the back side of the mast on the DB-411? Does
anyone have any experience in home-brewing a modification like this?
Dan Hancock N8DJP
Since no one else has mentioned them I'll say take a look at the Hustler Spirit
series antennas. Built similar to Stationmasters without the charging you for
the name price.
http://www.new-tronics.com/main/html/base_spirit.html
Dan N8DJP
--- In Repeater-Builder@yahoogroups.com, W3ML w...@...
One other thing to check for if you take it apart. If Tram is like Diamond, it
uses capacitors for RF coupling/matching along the length of the antenna. These
are power limited. Two transmitters TXing at the same time can make them go and
they also can pop easily if there is a surge like a
Try this one T.J. I've used one of their UHF antennas and they are very good
quality. Specs seem to fit exactly what you are looking for.
http://www.kathrein-scala.com/catalog/K5516231.pdf
Dan N8DJP
Antenna suggestion question?
Posted by: T.J. kc8...@yahoo.com kc8lts
Date: Sat Feb
I am trying to decide on a duplexer for a 900Mhz portable repeater made from a
pair of
Maxtracs.
I have found several on eBay that seem suitable, but if any of the guru's on
here
have input I would appreciate hearing your thoughts since I'm not usre which to
choose.
These are the ones I'm
Is the tower yours or are you on donated space? Can you re-mount your antenna
and make other changes on the tower?
If so, I assume the beam is end-mounted since it's only 5 elements. Try
mounting the beam through the tower instead of on the leg nearest the target
repeater. Then take some sheet
For those of you who did not receive the attachments I sent earlier, I
have posted them to the Files section.
Dan N8DJP
and
they blow you out of the console. I guess the Motherola engineers never heard
of ALC or the concept of using it on the console to keep audio levels even.
Dan Hancock N8DJP
Re: P25 (mis)Information?
Posted by: Steve S. Bosshard (NU5D)
[EMAIL PROTECTED] bosshardss
Date: Thu May 29
It was my undeerstanding that all digital TV would be on UHF, no VHF
and that the VHF spectrum would be re-allocated.
Am I in error?
Dan N8DJP
--- In Repeater-Builder@yahoogroups.com, MCH [EMAIL PROTECTED] wrote:
Has anyone else here seen the bull put out by NTIA on
Refer to the charts here for your answer.
http://www.repeater-builder.com/antenna/separation.html
Dan N8DJP
3. seperation between 2 440 antenna's
Posted by: JOHN KIHL [EMAIL PROTECTED] johnkihl
Date: Mon Jul 9, 2007 6:58 am ((PDT))
Good Afternoon,
We are putting up a 440
Our group just bought an MSF5000 900 Mhz, 75 watt repeater. The thing is
immaculate and the unit is even the PC programmable version, not the eprom.
New we need a manual.
Does anyone have the MSF5K manual for either 800 or 900 band they can part
with?
Or even one we could borrow long
Dan Hancock N8DJP
5e. Re: For Sale Midland Base Tech Transmitter Receiver
450 - 470 MHz
Posted by: Mike Morris WA6ILQ [EMAIL PROTECTED]
web_magician
Date: Fri Dec 22, 2006 9:42 pm ((PST))
At 07:40 PM 12/22/06, you wrote:
Hey Vincent Thanks
I know about ARR for preamps but Im
Get one of Sinclair's offerings similar to this model. It will take care of the
the broad frequency range problem.
http://www.sinclairtechnologies.com/catalog/series.aspx?id=280
Sometimes the obvious problem isn't a problem at all.
Dan N8DJP
4c. Re: GMRS UHF Ham Repeaters Sharing
When I lost the 2M section on mine Yeasu only replaced a diode. Has worked fine ever since. Repair charge was very nominal, actually much less than I expected.Dan N8DJPMessage: 5 Date: Fri, 06 Jan 2006 22:13:40 -0800 From: [EMAIL PROTECTED]Subject: OT: FT-8900 helpThe output power
Have you guys tried the Simrex (formerly GLB) helical resonator pre-amp? It's great for repeater applications. Very selective and moderate gain. If you're using Bp-Br type cans you don't need any further filtering. http://www.simrex.com/site/products/preselector/Preselector1.pdf
ne.
Fines collected from State Police arrests do go to the library fund, but not from arrests by county or local agencies.
And your comment about drinking pop while reading makes no sense to me.
Dan Hancock N8DJP
13 years with MSP
Come to think of it I had a conversation with the Michigan State P
Many years ago, my friend W8ICN told me of a cure for the invisible corrosion on Micor pins that they had developed at Detroit Edison. I couldn't remember what it was, so I dropped him an email about it. Here is his reply.
Dan Hancock N8DJP
We used a mixture of Squibb mineral oil and isopropol
Anyone know where I can buy both the service and the
application manuals for a VHF MSR2000?
I don't care if new or used as long as they are
complete.
Thanks
Dan N8DJP
__
Do you Yahoo!?
Meet the all-new My Yahoo! - Try it today!
I have a plug in module that I got with some
Spectra-tac receivers. It is similar to the metering
module for these units, except that it has no switch
on it for the various functions. It has only a meter
face, a speaker on/off switch, and a meter +/- switch
on the face and a speaker on the board.
Anyone know if International still offers an amateur
radio discount?
I know they had a special procedure to get it, a
particular person to talk to etc.
Anyone up to date on this?
Dan Hancock N8DJP
__
Do you Yahoo!?
New Yahoo! Photos - easier uploading and sharing
Nice comparison chart here.
http://www.k1ttt.net/technote/coaxloss.html#tables
You'll have to do your own price comparisons since
prices change all the time.
Dan N8DJP
From: Budd Turner [EMAIL PROTECTED]
Subject: Transmission line cost performance
comparisons
Happy Turkey Day All
Anyone
Why do you believe that double shielded cable is
necessary for an antenna run? What are you trying to
keep the signal out of?
Inter-cabling within the cabinet needs to be double
shielded to prevent interaction between the TX and RX
portions, but once those signals are merged at the
output of the
Date: Wed, 12 Nov 2003 18:47:59 -
From: Laryn Lohman [EMAIL PROTECTED]
Subject: Re: Static / desense problems
H-- what about the case where your single
shielded
cable runs
past a high power paging antenna,
Unlikely, since that stuff is normally at the TOP of
the tower, but special
31 matches
Mail list logo
