To All: Over the past 50 years I have worked with most all Cavity mfg's on
special and standard product applications. Let me assure you that the
interconnecting cables are critical. Some applications more so than others.
Msg for Nate; Before you try shot-gunning the symptoms, please spend the
LBI 4593 has the PA Xistor torque spec of 8 Inch-pounds for the older style 100
watt PA Xistors. It is located under the maintenance portion of the PA Assembly
(buried in the last paragraph). The list here for various size nuts is good
information to have on hand.
Fred W5VAY
- Original
To All: Recently I purchased a Motorola DC Power Supply on EBAY. The seller
sent me a model R1011AA supply along with a manual for a R1011B. Is there
anyone out there with a manual for a model R1011AA Power Supply? I would like
to get a copy of one if possible. Please respond directly to me.
There is a lot more that comes into consideration than height when you begin to
predict the range and/or coverage. I would suggest that anybody wanting to make
predictions of coverage obtain a copy of GE's DF-10003-1 VHF and UHF
Propagation. There are a lot of graphs, but It will help you get
To All: People who live in glass houses should not throw stones!
Now back to technical topics.
Fred W5VAY
- Original Message -
From: [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Saturday, March 24, 2007 1:14 PM
Subject: Re: [Repeater-Builder] Watch your use of
Bird Also makes an external sampler, Model 4275, with a BNC connector on the
side . This is rated 20 MHz to 1 GHz.
Fred Seamans
- Original Message -
From: Fred Flowers
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, March 15, 2007 9:34 PM
Subject: RE:
Tim: Try and get an old DB, Antenna Specialist, or Phelps Dodge base station
antenna catalog. They have some curves that are fair approximations of side
mount antennas on small surface towers(EG. Rohn 25G,45G, 55G). Most mfg. had
recommended 1/4 wavelength between the antenna and the tower. On
Jon: The 19D429656G1 circuit board is a line level compensating board. This
board is mounted on the sheet metal wrap around on the voter assembly and
interconnects to the voter module by jumper wires. LBI30768A describes the
voting module with the compensating board. Line level input to the
Actually Ken the loss at 800 MHz is usually less than UHF, especially in the
long needle pine forests.
Typical loss from forests, depending upon the density will be 10 to 20 db. Long
needle pine forests will cause an additional 10 db loss at UHF frequencies and
gets worse at 512 MHz.
Fred
Hire a good engineer or a consultant that specializes in radio microwave
systems!
Fred
- Original Message -
From: Kent Chong
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, December 07, 2006 3:30 AM
Subject: [Repeater-Builder] Simplex Repeater
Good Day,
We are
Users of MII mobiles as repeaters and/or base stations: You should expect
interference when you cut corners to save a buck and use a mobile for a
repeater. The mobile has no shielding to prevent RF entry or exit, none of the
leads are in/out of the Rx and Tx are bypassed as in the MII stations!
Does anybody have the following GE Repeater Control
Board that they would be willing to give up.
19D417385G1 or -G2
Please contact me direct.
seamansfh @ sbcglobal . net
Many Thanks
Fred Seamans
W5VAY
YAHOO! GROUPS LINKS
Visit your group "Repeater-Builder"
Gary: First; get some test equipment out to the Rx site. Is the noise there
when you receive a signal with out the link bringing the Tx up or only when
you let the link key up the Tx? The horizonal isolation at 2M between
dipoles is approximately 70 db. You didn't say what type antenna you had
John: You are approximately correct. The Mfg. will have a spec load and a
spec low voltage where the load cuts off. A greater load than this spec and
you should obtain less A/H and less than this spec load, you will receive a
greater A/H rating. The hard part is to find the Mfg specs.
Fred
The metal shielding in the base and repeater MII stations provide additional
isolation from each other and misc external sources of RF. As we have seen
many use the mobile for repeater systems and in most cases it does work
satisfactorily. But you will find some installations where there will
To All: Wanted, High split, low band,
Mastr-Professional, Rx strip and 100 Watt Tx strip. If any one has these in
their scrap heap and will sell cheep, contact me @ seamansfh @ sbcglobal .
net.
Thanks
Fred Seamans
W5VAY
YAHOO! GROUPS LINKS
Visit your group
Neil: MT74---33- for a mobile.
Fred
- Original Message -
From: [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, April 11, 2006 12:17 PM
Subject: RE: [Repeater-Builder] M-Pro
Hi,
I should have some of that / those in my garage. It's just
I need to think
Thank You for checking.
73's
Fred
- Original Message -
From: [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, April 11, 2006 3:49 PM
Subject: RE: [Repeater-Builder] M-Pro
I looked - thought I had one but don't ... all are sufffux 66,
77 88
Neil - WA6KLA
By using an interconnect with a security code that must be entered by the
caller before they get connected: such as the Motorola MRTI. They are on the
market cheep. I just picked up a spare MRTI-1000 on ebay for a dollar plus
shipping. A little difficult to program but not unmanageable.
Fred
Do any of you have a Tx CG Board,
19C331044G1, in your surplus parts stock? This is a Tx only Programmable CG
board. It is about 3" X 3" and mounts in the Tx exciter area of a MII
repeater station.
If you do, please let me know off net.
Fred Seamans
W5VAY
II mobile and base station radios.
LJ
-Original Message----- From: FHS
<[EMAIL PROTECTED]>Sent: Mar 10, 2006 8:22 AM To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] GE CG Board
Do any of you have a Tx CG Board,
19C331044G1, in your surplus parts sto
The Channel 2 Color Ant is for all of 6 Meter.
The BW is for the FM portion only.
Merry Christmas To All!
Fred W5VAY
- Original Message -
From: Daron J. Wilson [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, December 20, 2005 7:57 PM
Subject: RE:
Will the person that sent a msg to yahoo groups
about listing a low band station on EBAY please send me the EBAY Item Number. I
have searched EBAY under GE, Mastr, MastrII without finding it.
[EMAIL PROTECTED]
Thanks
Fred W5VAY
YAHOO! GROUPS LINKS
Visit your
Gentlemen:
I guess I will add my 2 cents worth here. In a two Tx Ferrite Hybrid
combiner each Tx will have at least one ferrite isolator and some times
three between the TX and the combiner. For a two Tx combiner there will be
approximately 3.5 db loss for each Tx. When increasing to a four Tx
Alex: I would urge you to look elsewhere for an antenna location. I worked
for a state forestry agency for ten years and we did not let anybody except
other governmental agencies on our lookout towers or radio towers. There
were just to many liability and cooperation problems when a problem
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