found this simple and cheap rf measurement kit at
http://www.foxdelta.com/products/pm3.htm
can it be use to tune a duplexer?
rgds
azam
The question is... do the fans run all the time or do they
turn on with temperature or keyed with RF or an external
logic (PTT) line?
It's pretty bad listening to fans whining at a radio site
A spinning fan is a working fan. Also kind of hard for a
mouse to build its nest in a
skipp025 wrote:
Bite Blocks for the Mouse and all will be quiet...
s.
I also find the bite blocks to be the best solution. If they are the
same thing I am thinking of, they are compressed mouse bait in a 1 inch
cube with a hole in the center. They are a lot less messier than the
No. It is a power meter, not a spectrum analyzer. To use such a device to
tune a duplexer, you must transmit a signal through the duplexer while
tuning it- not a good idea! Unfortunately, the proper equipment for tuning
duplexers is seldom simple or cheap. However, for measuring the power
Agreed. Plus, a constantly-operating fan pulls a lot of dust and dirt into
the equipment. Besides, the fan is ineffective until the heat sink gets
warm, so starting it immediately upon key-up is a waste of energy. In my
opinion, a snap-action thermal switch mounted on a heat-sink fin is the
If you have a decent radio with some type of receive signal
strength indicator, some coax cables a separate transmitter
radio (an HT would work) and some attenuator pads from Ebay...
you could do it.
s.
Azam 9w2...@... wrote:
found this simple and cheap rf measurement kit at
hey all, must be the season for truckload sales.
this time it's my own stuff.
i want to unload, er... sell, an OPERATIONAL repeater, irlp, simplex setup.
you'll be needing feedline and an antenna unless you want the quad-band
vertical from mfj.
ok, you can look over the pictures from the
Hey Skip, for those of us who have a service monitor without a Spectrum
Analyzer built in, is there an alternative to using a radio with an S-meter
on the duplexer end to see the peak and notch? I was wondering if an RF
Meter would be sensitive enough to pick up the peak of the regular output of
a
Low power HT, VSWR meter and dummy load will get there but not as
perfect as the proper RF kit. It can be done as Skip suggests.
Cheers and seasons greetings to all...
Doug
On 23/12/2009 18:20:18, Jim Cicirello (ka2...@gmail.com) wrote:
Hey Skip, for those of us who have a service monitor
Hi Jim,
If I were starting from scratch... there would be a fair
number of different equipment types and styles I could
use to tune a duplexer. It's just a question of how much
time I want to put into the task.
In short, you would like to have some type of signal
source, a signal
Hello again,
Doug reminded me of two other items... one is the must
have of one or two decent terminations (decent quality 50
ohm dummy loads), decent quality coax jumpers and some
coax adapters (if required).
Use of coax adapters is sometimes hard to avoid... but
using modest attenuator
Hi Skip,
Ever think of writing a book.so much to offer and helped me and many
others, many times.
Thank you and Seasons Greetings to you and yours Sir...you are what
Amateur Radio is about...(and the group).
Doug - GM7SVK
On 23/12/2009 7:06 PM, skipp025 wrote:
Hello again,
Doug
It depends on the type of duplexer.
Certainly a spectrum analyser with tracking generator, or better still a
network analyser, is ideal for tuning notch type duplexers, but you can get
away with simpler equipment with bandpass type cavity duplexers.
Indeed I have tuned several repeater
You can get close with minimal equipment.
Here's one I did (2 meters, 600 KHz spacing).
Start by doing each cavity individually.
I used my old Motorola S-1318-A signal generator
to the cavity with a Tee connector, then to
a UHF Tee connector with the Tee'd pin
unscrewed, then to a dummy load.
Hi guys .Has anyone any information on the mic that can be used on the data
radio mic input (pin 7) or have been able to adapt a mic to be used on it
Thank You ,Ian Wells
Kerinvale Comaudio,
361 Camboon road, Biloela.4715
Ph 0749922449 Mb 0409159932
Hm 0749922574 Fx 0749922767
At 12/23/2009 08:24, you wrote:
The question is... do the fans run all the time or do they
turn on with temperature or keyed with RF or an external
logic (PTT) line?
It's pretty bad listening to fans whining at a radio site
A spinning fan is a working fan. Also kind of hard for a
At 12/23/2009 08:54, you wrote:
skipp025 wrote:
Bite Blocks for the Mouse and all will be quiet...
s.
I also find the bite blocks to be the best solution.
Even better: don't leave any holes for the critters to get into your
cabinet. I've always used bulkhead N feedthroughs for all my
At 12/23/2009 08:19, you wrote:
found this simple and cheap rf measurement kit at
http://www.foxdelta.com/products/pm3.htmhttp://www.foxdelta.com/products/pm3.htm
can it be use to tune a duplexer?
Hard to say, since the above doesn't really say what the instrument
does. I assume from the
18 matches
Mail list logo
