Hi again guys .After tuning a notch mobile duplexer with a service monitor
and spectrum analyzer .The tuning indicated the duplexer was tuned
correctly but when the 40 watt transmitter was applied then the output of
the duplexer was around 10 watt then certainly something is wrong with the
According to ye olde ARRL Ant. Hdbk (1974), p. 66, Fig 2-87, it IS dependent on
diameter of the elements AND spacing. (See also Jasik, Antenna Engineering
Handbook (1961) for more.)
What handbook are you referring to?
This plot shows S/d2 vs. d2/d1, where S is spacing between the elements,
Ian,
From your description, I can think of two reasons why the duplexer is not
performing to your expectations:
1. It is, in fact, NOT tuned correctly, or
2. It is incapable of performing properly in the new band segment that you
are tuning it to.
Many years ago, I bought a Yaesu/Vertex
On Fri, 21 Aug 2009, John Sehring wrote:
Then of course 12 identical receivers, I'd use, oh, Mitrek's or
MaxTrac's. I think I'd not be inclined to use Micor or any of the
Syntor radios because they are purpose-designed radios for quite wide
freq. spreads. This necessarily makes for the
Robert n Eric others, Progress, i followed these offerings, what has worked
so far, is changing the control head, the set will now power up,
However, i now have the message 'MODE 3' and then back n forth the message
'OUT RNGE'.i then tried to do a download from the code plug, but
Hello All,
i have a motorola repeater here with me whose picture is also attached here ,
there is really nothing written much on the body of the repeater to be able to
indentify it , except on the little sticker in front of it written . Storno
Electronics Made in Germany, VHF repeater and
Dear Savy,
That's not a Motorola! It is a Storno. We had the older model, mostly used for
the special sevices. It is very reliable and some are still in use, even they
are more than 20 years old. The trouble with them is that they use Xtal
oscillators, and are hard to find and tune. My
For Sale Motorola Astro Spectra Desk Tray with Speaker .
Picture Available on Request . $40.00 Shipped . Please Contact Me if Interested
. Paypal Payments Welcome .
Steve.
Back in the 70s I bought some IMTS GE Progress Line radios from the Western
Electric depot near Cleveland Ohio. They were being offered to Hams due to an
upgrade. I asked the tech what the letters meant and he told me they were
channel designators, one for the receive channel and the other for
Thanks Eric .The uhf diplexer is a 6mc450s and it has been tuned to the
makers procedure (tuned for the notch and not pass).The notches came up with
ease around 70 db each side and the db loss at the pass frequency was around
1-2 db .I am using a hp8921a with the duplex out and ant in connections
I'm not familiar with those particular duplexers, but the Celwave duplexers
Eric mentioned are easily damaged by over-power. Usually the insulators at
the open end of the resonators (the ends with the tuning slugs) arc over
and/or develop carbon-ish deposits. In cases of mis-tuning, sometimes
.thanks Jeff .The duplexers are only being used with maxon 40 watt
Radios and shouldn't be over the specs and the ants are the correct ones
For the frequencies.
I am thinking that when power is applied then the duplexer sparks
Internally causing low output during transmission
Thank You,
Ian
A friend brought a Motorola Desktrac Repeater over
with a question or two.
It seems like he can program the receiver and
transmitter with frequencies and they operate as
normal.
However, the unit will not duplex (act as a repeater)
repeat with the internal controller. Can one of you
Just received the crystal for a new operating frequency but the formula
Xtal=(f-21.4)/6 shown in the manual is wrong and so is the schematic.
A second multiplier is in place on the circuit board that is not indicated on
the schematic. Instead of the divide by 6 factor, the manual should read
I am trying to use a Yaesu 5200 rig for a remote base- link radio on my
repeater with a CAT 400 controller. I can not get the repeater to key from the
link radio. Does anyone know how to get COR from the yaesu 5200. Thanks for any
help Chet AA8CC
RAIN Report 8/21/09: KT1B Commentary on Green Petition to Ban Closed Repeaters
(9 minutes)
http://www.therainreport.com/rainreport_archive/rainreport-8-21-2009.mp3
RAIN Report 7/24/09: K3BEQ Petitions the FCC to Outlaw Closed Repeaters (14
minutes)
As long as the Spectra is displaying the OUT RNGE message, it is trying to get
a control channel and is locking the BUSY or DATA lines, the RSS can not read
it.
Try changing MODEs until the radio is not displaying errors, ect. Then READ.
Mac McCullough .. wrote:
Robert n Eric others,
I'm not aware of any closed repeaters in the WDC area. In the VA-Md-DC area
perhaps a half dozen noted as (c) by T-MARC. There are dozens of repeaters in
the WDC area that go unused day after day after day with a little use in the
evenings by a few hand fulls of civil defense volunteers. There
At 8/28/2009 15:28, you wrote:
I am trying to use a Yaesu 5200 rig for a remote base- link radio on my
repeater with a CAT 400 controller. I can not get the repeater to key from
the link radio. Does anyone know how to get COR from the yaesu 5200.
Thanks for any help Chet AA8CC
It probably
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
Not this again... sheesh.
-Brian
On Fri, Aug 28, 2009 at 5:27 PM, WA3GINwa3...@comcast.net wrote:
I'm not aware of any closed repeaters in the WDC area. In the VA-Md-DC area
perhaps a half dozen noted as (c) by T-MARC. There are dozens of repeaters
in the WDC area that go unused day after
Anyone have experience with the Q2330E duplexer? Originally from 155Mc. Best
I can get is 80db on the tx side and 60db on the rx side (calls for 70) 2.7db
of loss on tx seems high too.
Can I expect decent performance at 146?
Anyone else find them tough to tune?
Thanks,
Chris-KC4CMR
Dave,
I think Murray has an issue with repeaters that have a PL but not
advertising the pl in any of their announcements. I'm not aware of
any closed repeaters in Metro DC either, but I am aware of several
with PL that do not have it on the ID/Announcement.
As for GMRA and PL, they have a
I did the mod in the manual with the jumpers, I have pin 5 hooked up for the
COR. I see no change in voltage when I open the squelch on pin 5. Any other
ideas?
--- On Fri, 8/28/09, n...@no6b.com n...@no6b.com wrote:
From: n...@no6b.com n...@no6b.com
Subject: Re: [Repeater-Builder] Yaesu 5200
Thanks for the info,
I suspect the FCC is going to frustrate him further.
Best,
dave
- Original Message -
From: Dan Blasberg
To: Repeater-Builder@yahoogroups.com
Sent: Friday, August 28, 2009 10:55 PM
Subject: Re: [Repeater-Builder] RAIN Report: KT1B Commentary on Green
At 8/28/2009 20:05, you wrote:
I did the mod in the manual with the jumpers, I have pin 5 hooked up for
the COR. I see no change in voltage when I open the squelch on pin 5. Any
other ideas?
Are you checking the correct band? According to the manual, this only
works on the primary (left)
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