I have seen the screw in the ends modification and am leaning in
that direction. But they need to be well sealed I am sure to prevent
corrosion and the associated noise that can be produced.
I understand that the element to the support contact needs to be
welded also to remove that
Anyone know of a source for the load resistor which is used in a
IFR-1200S service monitor? The device is labeled ACR 0603, CR1060. A
picture can be seen at:
http://w4dex.com/temp/ifr_1200s_power_sensor.jpg
Thanks,
Dexter
Yahoo! Groups Links
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The distance from the top of the pole to the top dipole is not
critical and could easily be moved up to get more room down below for
more spacing. The dipoles need to work up against the pole for proper
impedance but if the top of the top dipole is 3-4 down that should be
OK. If you still
To bad that both of the guys that had the most to do with the design of
these two antennas are either semi-retired or retired and neither one are
Hams. Wouldn't it be great if they were?
Paul
-Original Message-
From: Laryn Lohman [mailto:[EMAIL PROTECTED]
Sent: Sunday, January 23,
Has anybody had to ask another repeater owner/trustee for letter of approval
for short distance for re-coordination..
I am looking to move one of my vhf repeaters a few miles east/south east
and another user is on the same freq.(north of me), and I will fall with-in
the 100mile radius. Moving
Looks like you have a Motrac Consolette base station.
Bill Beech wrote:
I am in possession of a Motorola Desktop station. It contains
a power supply, 2 receivers and one transmitter.
2 receivers? That's unusual.
The receivers are marked TLB6322A dated May 18 1971.
The
Thanks Neil, that was exactly the problem. The Spectra-Tac delay was set to 1500 msec. I guess my second counting was a little fast, as it was only about a second and a half in reality. I set the delay to zero for now until I can locate a non Spectra-Tac codeplug, and all seems to be working
At 10:32 PM 1/23/2005, [EMAIL PROTECTED] wrote:
Has anybody had to ask another repeater owner/trustee for letter of approval
for short distance for re-coordination..
I am looking to move one of my vhf repeaters a few miles east/south east
and another user is on the same freq.(north of me), and
About the only way to get rid of the strobe light interference is to get as
far from the strobes as possible. Some of the strobe manufacturers have a
EMI cage to go over the strobe, but this does not do much good. This
information is about two years old when I worked for a company that
Mike's suggestion is the best method and the one I would choose. I would
suspect that this would be the method used by a ham that has no problem
drilling a hole in his car to mount a mobile antenna. On the other hand, I'd
be willing to bet that the extend the element with a bolt crowd is the
Hello All,
Do not count on this info being right.
The top needs to be right from the
top of the mast support pipe to the
1st dipole and then center to center
on each after. If the support pipe is
not long enough get a longer one. They
come in different lengths one for 222
is shorter then
Part of the different's is between the harness.
Different'sin factors in the coax used.
That is why we have to watch out here at
work when repairing DB-224's. Be careful.
Over the years and with change of ownership
DB has made changes along the way.
Dean Westbrook, EE,PE.
At 04:29 PM 1/23/05, you wrote:
I have seen the screw in the ends modification and am leaning in
that direction. But they need to be well sealed I am sure to prevent
corrosion and the associated noise that can be produced.
I understand that the element to the support contact needs to be
welded
I will have to agree with Dean on this
one. I took the DB-224 as it sat with the changed elements, old 150-160
harness, put the antenna up 60 in the air, and it was out performed by
20 to 25 miles against a Diamond XNH-510 Dual Band Antenna.
Impedance if I remember right was somewhere
I have the base station manual available
68P81012E-15-J 450-512 Mhz
Contact direct
K.Paul Boggs
[EMAIL PROTECTED]
Mountain Emergency Communications
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Gee wonder if I can get him to do that on my DB-304, that would be nice.
A one of those days projects. Hamfest days.
But I have seen one of these done about the same way, and has had no
problems with it since it went into service. Should have been a machinest.
Mathew
-Original
NØATH wrote:
Hey Jim - wouldn't that work if you used a 12 volt relay powered by the
Astron?
I understand what you are saying and your post has warned me of a potential
problem coming on my system ( which has a 120 volt relay ) Never ever even
considered that possibility. Thanks for the
I just went through this with a move of my repeater. When I sent the
application to the coordinator, he sent me a BIG rash of crap. I
decided to contact him by phone. After about an hours discussion he
decided that 3 miles wasn't going to make any real difference, so he
allowed it.
Now Does
Hey every one,
Let us not forget that they change the spacing to get down till on the
DB-224.
Also Dean does this stuff every day. The old saying you can't beat a person
at there own game mite apply here.
73 Russ, W3CH
- Original Message -
From: highlandfl [EMAIL PROTECTED]
To:
Hey Mathew,
Speaking of GMRS I just picked up last Friday
two DB-420's for GMRS and we will be installing them on two of our three
GMRS repeaters. I pulled one out of the box and it looks like they will do
the job on GMRS. A very nice looking antenna.
We just installed one on 443.050 (Ham) last
russ wrote:
Hey every one,
Let us not forget that they change the spacing to get down till on the DB-224.
Wrong.
The only way to get downtilt on a binary fed exposed dipole array is to
either build the phasing harness so the electrical length feeding each
element is slightly longer in phase
Brent,
I've done this. It's not that bad. Just explain the situation to the other
repeater owner and he'll most-likely agree. You might do a coverage study
of your new site with Radio mobile to see if your move is likely to effect
that other repeater. If you can show that your change in
Brent wrote:
Has anybody had to ask another repeater owner/trustee for letter of approval
for short distance for re-coordination..
In Western Pennsylvania, we use a Waiver form for this. I have been
involved with 4 such instances, 2 where I was the asking party, 2 where
I was the granting
Sounds like a ground issue. Your Astron 35 amp power supply is actually 26
amps normal, 35 amps surge. How much power are you running? Some of the
other techs can correct me if I am wrong, but to tie them together you have
to use some diodes to prevent one from feeding back into the other.
You can keep your loads seperated and just tie the ground side (negative
terminals)
of both power supplies together. This should take care of the problem.
Connecting
the power supplies in parallel to increase the current capacity can be
troublesome
at best. Good luck and 73,
Kevin, K9HX
At
Ok, I know this sounds silly, but my repeater is now hearing better
than it transmits. Here's the setup, the the issue. I have a
Maggorie (no comments) HiPro transmiitter running 2 watts into a
Vocom Amp running 160 Watts into the duplexer, 130 out to the
antenna, fed with 7/8 hardline
I searched through 10,000 posts and did not see this as a topic, so
perhaps it is safe to ask?
While building out my repeater empire, I discovered that an Astron RM-
35 does not like providing 30 amps continuous :) So, I thought I
would run the latest repeater on a separate power supply.
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