What do you want to build a vhf, uhf, or other band repeater? How much do you
plan to invest in the project? And what space is avaliable for the finished
project? Are you going in to a low rf enviroment or a high rf repeater site?
Simplicity says 2 back to back radios through an interface.
Hello,
I have a rather basic question for everyone. I am going to be
installing a 4 cavity VHF duplexer (Sinclair Q202G) inline with my
repeater very soon. I know that the interconnecting jumpers from can
to can should be 1/4wave for your frequency. If you can get the cans
to tune up with
OK... I'm needing one of these animals. Of course, I'd prefer to
have one out of the box as opposed to trying to fabricate one out
of a number of feet of coax, both for esthetics as well as
functionality.
I tried to find one on the Tessco site, but apparently they aren't
called attenuators -
I trust that if there is no Low-Pass filter at the isolator output, a passband
cavity would do the job?
LJ
-Original Message-
From: Bob Dengler [EMAIL PROTECTED]
Sent: May 9, 2005 10:13 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Low-Pass Filters for Ferrite
http://www.tessco.com/products/getProductInfo.do?sku=12628
Joe
--- n9wys [EMAIL PROTECTED] wrote:
OK... I'm needing one of these animals. Of course,
I'd prefer to
have one out of the box as opposed to trying to
fabricate one out
of a number of feet of coax, both for esthetics as
well
Larry,
Yes, it would, although a bandpass cavity usually has more loss than an
isolator. A cavity also filters
out synthesizer noise and other spurious signals that may be generated in the
exciter or PA.
73, Eric Lemmon WB6FLY
[EMAIL PROTECTED] wrote:
I trust that if there is no Low-Pass
Mark,
Tessco does have the attenuator you seek, listed under RF Attenuators.
It is Tessco #12628, which is a Bird #10-A-MFN-06, for about $88. It is
good for DC to 4 GHz.
73, Eric Lemmon WB6FLY
n9wys wrote:
OK... I'm needing one of these animals. Of course, I'd prefer to
have one out of
Larry,
Take a look at the performance ofthat Bp cavity at2nd harmonic of Fp See whacha think!
Roger Hansen, W6TOZ-Original Message-From: [EMAIL PROTECTED] [EMAIL PROTECTED]To: Repeater-Builder@yahoogroups.comSent: Tue, 10 May 2005 08:49:23 -0700 (GMT-07:00)Subject: Re:
The obvious answer would be the amount of
energy coupled to the two-loop bp cavity
output port should be minimal at the second
harmonic.
A lot of people assume the isolator/circulator
is an automatic serious level 2nd Harmonic
generator. I've not found that to be the case.
Places to be
I am looking for a VHF High Band antenna for an APRS Digi (144.39 MHz).
The site is remote and I am looking for something that will last.
Commercial grade antennas only.
Can pick up at Dayton. Please email [EMAIL PROTECTED]
Thanks,
Terry
KE4PJW
Yahoo! Groups Links
* To visit your
Hi
Dependant on the typr of filtering used .The standard
is either a cavity or a 2nd harmonic filter which is
very small in size.1 by 1 .
Regards
Brad ZS5WT
--- skipp025 [EMAIL PROTECTED] wrote:
The obvious answer would be the amount of
energy coupled to the two-loop bp cavity
output
Mark,
I don't know why you discount the idea of using a length of coax as an
attenuator. I have used coax many times for this exact application. For the
power level you mentioned you can wrap up a length of RG58 (or one of the
double shielded varieties) into a managable coil. Darn sight
Anybody got a spare notch cavity for 2M sitting around
collecting dust? There is an APRS digi that at my site that desenses my 2M
remote base and it annoys me.
Thanks
Jamey
Wright
Systems
Analyst
Morgan
County EMCD 911
Decatur,
Al
256-552-0911
Yahoo! Groups
At 01:37 PM 5/10/2005, Jamey Wright wrote:
Anybody got a spare notch cavity for 2M sitting around collecting
dust? There is an APRS digi that at my site that desenses my 2M
remote base and it annoys me.
I have used a sinclabs filter to take care of this, four tunable cavities
in about a 1'
FYI on orders to Bomar Crystal.
Just had a flustrating phone conversation with Bomar. Ordered 3
crystals at $10 each. Came in at $20 each plus $10 shipping.
Asked why. Was told it was billed wrong. Offered to credit me $2.50
each as they made them on a 2 week basis (RUSH) and there is a
They did allow me to send them back for
full credit.
Pretty much says they're honest and that anyone
can make a mistake, even if there is no one to
blame it on.
A better offer than I've had with some of the
other xtal companies.
cheers,
skipp
ps: I order 100 plus crystals from
I understand your frustration Mark. However each time I've done a phone
order from Bomar they have told me the total for the order while on the
phone. They started the $50 minimum order several years ago but I don't
see any mention of this on their web page. I've had a few problems with
Joe, Eric and all...
I searched again after I sent my first message, and I did find this item. Thanks for alerting me to it also. This is exactly what I'm looking for.
Mark - N9WYSEric Lemmon [EMAIL PROTECTED] wrote:
Mark,Tessco does have the attenuator you seek, listed under "RF
I've been doing business with ICM since the late sixties.
Neil - WA6KLA
DCFluX wrote:
I sleep comfortable at night with ICM goodness.
On 5/10/05, skipp025 [EMAIL PROTECTED] wrote:
They did allow me to send them back for
full credit.
Pretty much says they're honest and
we have ordered lots crystals from Bomar and they always work and with out
problems. Just need to understand the price. Good is not always cheep.
John
- Original Message -
From: Mark Boden [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, May 10, 2005 2:52 PM
we have a db-414-2 2 cavity
148-174 mhz typ rej 43 db
in db cat no 22 pg 52
$150 for the pair exc condx no coax jumpersmdmJamey Wright [EMAIL PROTECTED] wrote:
Anybody got a spare notch cavity for 2M sitting around collecting dust? There is an APRS digi that at my site that desenses my
-Good is not always cheep.
Very, very true. That is why I always use ICM. I have a 100% satisfaction
rating on every order I have ever placed with them. Recently, they even
offered us a great quantity discount on some Minitor II crystals for our
2-meter repeater freq. In qty of 50 or more $3
bill
its definitely ME! i just uncovered the ces 5200 on a shelf. thought i'd lost the thing.
need to copy the book if possible or pay someone to do it.
thanks for you remembering and diligence in finding me.
Ted Bleiman K9MDM
fone below
William M Melder [EMAIL PROTECTED] wrote:
hi ,this is
Olá,
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Esta confirmação é necessária porque [EMAIL PROTECTED] usa o
Antispam UOL, um programa que elimina mensagens enviadas por robôs,
como pornografia, propaganda e
At 5/10/2005 01:28 PM, you wrote:
I've been doing business with ICM since the late sixties.
Neil - WA6KLA
Did you notice a period of bad xtals from ICM around 1986-87 (the same time
that ICM became a dealer for Shinwa radios)? I did.
Bob NO6B
Yahoo! Groups Links
* To visit
--- In Repeater-Builder@yahoogroups.com, dekk5fm [EMAIL PROTECTED]
wrote:
I work for a TV station, and we were planning to use an MSF-5000 to
transmit our program audio to field crews. However, our local /\/\
shop tells us that it is not possible to disable the time-out timer,
and that the
If memory serves me right, if you set the time out timer to 0 (zero) it will
be disabled. At least I think that is the way mine is set up.
Charles Miller
I work for a TV station, and we were planning to use an MSF-5000 to
transmit our program audio to field crews. However, our local /\/\
What is the best way to reduce power on a 100 watt micor mobile for
repeater use? I have redused the voltage in to 12.8 volts and have
developed a cooling system on the P.A. deck that has constant air flow
over the circut board as well as the the heatsink.
Thanks, Bruce KD4BOH.
I had one ICM crystal finally die after it had been in service for
15? years in a GE Mastr Pro about that time. ICM sent me a new one
pronto.
At the time, I felt the 15 year age of the Mastr Pro was stretching
my luck ... but since the radio performed flawlessly over the years,
I
Hi There!
Micor mobiles do not like be lowered below 2/3 rated output.. they like to go boom!
I had a couple of 100 watters that both went funny even thought I had them in the 60-65 watt range. they were replaced with 40 and 60 watters and those micors are still playing today. I have
465 seconds is 7.75 Minutes ... I find it rare a TV station can
do a news broadcast for more than 5 or 6 minutes without breaking
for some damned commercials.
Is it possible to completely remove the time-out-timer?
Neil McKie
dekk5fm wrote:
I work for a TV station, and we
Set the TOT for 0 and it disables it.
73's
Andy
--
NC Certified Firefighter III / Instructor II / EMT-A
FCC Licensed Technician / Amateur Call NC4AB / Echolink Node 5761
http://www.brinkleyelectronics.com
Yahoo! Groups Links
Bruce,
Although you can disconnect half of the four final transistors and change
the matching components appropriately to have a 50 watt PA, it's better to
simply exchange the 100W amplifier board for a lower power board. I'm
guessing that you could probably find someone to swap boards with,
I'll throw this in just because; I'm not sure if it's the case with
the VXR-5k, but for what it's worth on the VXR-7k you must solder a
jumper from a pad out to one of the pins on the rear to bring the COS
logic out.
Like I said, not sure if this is applicable to the VXR-5K, but just a
heads up
Good Evening Folks...
While I would prefer to install a DB products folded dipole antenna at
a new site I'm preparing, cosmetic issues are not going to allow me to
do so. Somehow I'm sure though, others have been in my place before.
Therefore, my question is, what is everyone using for a
Thanks Eric and Brian for the info. I've been able to run it for 10 yrs @110
watts on 145.270 without any problems in an air conditioned environment. But
I'm moving it to a remote location without a/c. I guess I will leave it as
is, as I need the power as much as I can get. No duplexer on this
Mark,
I am about to order crystals for 6 repeaters, was thinking about Bomar or
Standard, can't afford International for obvious reasons. Glad you posted
this, I will be very careful!
Paul
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] Behalf Of
brucenanney wrote:
What is the best way to reduce power on a 100 watt micor mobile for
repeater use? I have redused the voltage in to 12.8 volts and have
developed a cooling system on the P.A. deck that has constant air flow
over the circut board as well as the the heatsink.
Thanks, Bruce
If you cannot afford International, you cannot afford to put a repeater on
the air.
Repeaters can get to be costly. Being a good neighbor is very cheap
insurance. Poor crystals = being a possibly bad neighbor (causing
interference or being off frequency).
Good quality every thing in a
Bruce Nanney wrote:
Thanks Eric and Brian for the info. I've been able to run it for 10 yrs @110
watts on 145.270 without any problems in an air conditioned environment. But
I'm moving it to a remote location without a/c. I guess I will leave it as
is, as I need the power as much as I can get.
Why is it a common theme for some in this group make a statement such as
this?:
If you cannot afford International, you cannot afford to put a repeater on
the air.
What a fine piece if discouragement this is for the people just learning to
put a repeater together. Ham radio is all about
Where did this come from?
I didn't get a copy of it, but my spam blocker might have filtered it out...
Kevin
skipp025 wrote:
Olá,
Você enviou uma mensagem para [EMAIL PROTECTED]
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Yahoo! Groups Links
* To visit your group on
Probably because it's true.
There are things you can skimp on in a repeater and get lesser
performance, and there are things which if messed up cause
all sorts of problems, for both the repeater users and others.
A crystal is definitely one of the latter. Getting cheaper coax
means degraded
In my opinion, and I have participated in this for quite a number
of years, if you like visiting your snow bound repeater site in the
dead of winter because the transmitter crystal drifted off
frequency, fine. Go ahead and buy the cheaper crystal.
If you don't like visiting your
One time a few years ago, one of the now lurkers on this remailer,
brought his 100 watt high-band Mocom-70 to me to tune up for him.
On a lark, I decided to run it wide open in this case with 16
Volts DC. Wide open, the 100 watt transmitter put out 240 watts.
Ran my 100 watt
Kevin,
Just got a Micor mobile repeater going. Was
planning on running 110 watt amp around 65 watts. Installed a 120 vac squirrel
cage fan right next to side heatsink.It is controlled via thermo switch
mounted inside radio on heatsink casting. This fan nearly blows the paint off
the
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