In reference to below, what would be the real advantage to
using CP antennas in addition to the V and H you'd have
already? Any signal that arrives will excite a V and/or H
antenna according to it's arriving polarization, and I don't
see where CP would be a help.
If you're going to use
While I'll agree that more isolation, then what is needed to
insure no desense is a waste; if this gentleman is suggesting
that isolation in reserve is a waste, I strongly disagree.
Why? Operating conditions can change - snow and especially
ice on the repeater antenna can detune the
I recently replaced a piece of Belden 9913 coax between the
repeater TX and the duplexer with a piece of RG-214. All of
our noise problems went away.
A HA!
Unfortunately I am out of RG-214. I have some Belden 9888
Triax and need to know if anyone has experience using it for
repeater
Would anyone care to comment on and compare the tools offered by both
Paladin and RF Industries, as well as the link earlier in this thread?
Not cheap, but not the several hundred dollars either as quoted by
someone above.
OK, here's probably more than you ever wanted to know about crimp
The standard Kings frame is KTH-1000. The Daniels HX4 is
basically a clone
of the Kings KTH-5000. Kings, Daniels, et al make other
models, but the
KTH-5000 is the most common style.
Sorry. Replace KTH-5000 with KTH-1000 in the above paragraph...
I'd like that information also. I know that some of the
more technically
proficient hams out there who do RF design / installation
for a living
use
crimp only connectors, and swear by them. Are there other
vendors out
there
that people have used which are comparable to the
to buy one of these tools - although
the Daniels HX4 and Kings KTH1000 crimpers look identical,
their dies do not interchange.
wb0emu
--
--- In Repeater-Builder@yahoogroups.com
mailto:Repeater-Builder%40yahoogroups.com , Jeff DePolo
Yes , I've tried to feed the signal from my external reference
oscillator into the 1200, but it takes literately volts of
signal to get
it to switch to the external osc. input.
I forget what the spec was, but it seems to me it was less than +10 dBm. I
think there was a warning on it
Have you ever tried KG Electronics (http://kgelectronics.com
http://kgelectronics.com )?
I remember talking to them before retiring the 1500, but I don't remember
what the price was to replace the CRT. The attenuator (mechanical) was
getting noisy/leaky too, so between those two problems, I
I wonder what the diameter of the center element, or plunger, was?
I think I still have one with the rivets drilled out, I'll measure when I
get a chance.
--- Jeff WN3A
conductor/plunger assembly email direct.
--- Jeff
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jeff DePolo
Sent: Monday, July 13, 2009 8:08 AM
To: Repeater-Builder
conductor/plunger assembly email direct.
--- Jeff
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Jeff DePolo
Sent: Monday, July 13, 2009 8:08 AM
To: Repeater-Builder
I'd be leaning toward an HP. Even if you have to pay a little more up
front, you'll come out ahead of the game in the long run. I have three HP's
(two 8920B's and an 8921A, with various options), and in the last ten years
or so, only once have I had to get one of them repaired (spectrum
option, make sure it works properly. I have a bad IFR1200
here that the
heater on the oscillator crapped out. The service monitor
works, but it
is way off frequency and can't be adjusted. The last time I priced
repair, it was in the $1,000+ range.
73, Joe, K1ike
Joe,
You've
In your experimentation, were you using 4 diam 450 MHz cans
operated at 3/4 wave for 1296 or 4 cans at 1/4 wave
(stubbies !) for 1296 ?
I used both. I used UHF 4 pass cavities as 3/4 wave resonators, and also
took 900 MHz 1/4 wave cavities and cut down the center to shorten them. In
both
Alex, if memory serves, the component differences for the lowband
audio/squelch board are documented in the manual. I don't remember if the
station and mobile boards both have different components for lowband, or if
it was just the station. I also don't remember if the SpectraTAC audio
board
Also, this project is designed to use in a mostly stationary
situation, and I was thinking of incorporating a spring or
something similar at the base of the antenna to minimize the
shock to the antenna connector.
Using your idea, how about a small spring at the base, followed by a
With a preamp, if you're only getting -106 dBm sensitivity, something is
wrong. If memory serves, the spec for 12 dB SINAD without the preamp for a
highband Mastr II is 0.35 uV (-116 dBm), and with the UHS preamp the
sensitivity was 6 dB better (-122 dBm).
Looking at the GE isolation curves,
Bench testing showed the cavities performed as expected in
1/4 wave mode,
but no amount of loop tweaking or black magic cursing could
get the insertion
loss to acceptable levels when operated in 3/4 wave mode
(1296 MHz). Typical
IL was 2 to 3dB per can at these frequencies. All test
What type/model/brand/size of cavities were you using? The
first thing that
comes to mind was that the cavity you were attempting to use?
--- Jeff
Sorry, hit send too soon.
The first thing that comes to mind was that the cavity you were attempting
to use had geometry that was causing
Jeff,
Do I understand you to then also reject the idea that an
omnidirectional colinear antenna, top-mounted on a basic
metal pole, is bogus to claim 6 dBd gain in all directions at
the same time?
Nope, I didn't say that at all.
The convention is to measure gain at the horizon. The
The gain figures I quoted are dBd reference the dipole
mounted in place of the DB-224 before the test. The
Scientific Atlanta turntable was connected to a circular
strip chart and the amplitude measurements were recorded
directly to the strip chart which was submitted. The
turntable
Back when we had to submit an antenna pattern in order to get
a repeater license for the ham bands, I mounted four elements
of a DB-224 directly on one leg of a Rhon 25 tower and
mounted the two tower sections on an antenna test pedestal
and ran the pattern. With the antenna sections
mast, shows
9 dB to the front, 6 dB to the sides and 3 dB to the back of
the mast.
Almost a circle, offset.
Chuck
WB2EDV
- Original Message -
From: Jeff DePolo j...@broadsci.com mailto:jd0%40broadsci.com
To: Repeater-Builder@yahoogroups.com
mailto:Repeater-Builder
Their sample pattern when side-mounted on a tower shows 9 dBd
forward gain and -2 dBd off the back away from the tower,
again with all elements in a line. That may be getting
closer to being realistic.
Err...upon closer look (zooming in on the PDF)...it's more like -3 to -4 dBd
off the
Looks like there is 2 dB loss at a 600 khz + spacing
(which is where the problems were). (all 4 cans = 2dB)
2 dB is fine for 4 cavities per side. If you are able to get under 2.5 dB
for those 4 cavities when retuned on 2m, I'd say you're doing pretty well.
What about the links inside the
?
Chris
Kb0wlf
-Original Message-
From: Repeater-Builder@yahoogroups.com
mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-
buil...@yahoogroups.com mailto:Builder%40yahoogroups.com
] On Behalf Of Jeff DePolo
Sent: Friday, June 26, 2009 9:00 PM
To: Repeater
is just screwed together.
Correct?
Chris
Kb0wlf
-Original Message-
From: Repeater-Builder@yahoogroups.com
mailto:Repeater-Builder%40yahoogroups.com [mailto:Repeater-
buil...@yahoogroups.com
mailto:Builder%40yahoogroups.com ] On Behalf Of Jeff DePolo
Sent: Friday
I pulled out an ARR P432VDG GaAsFET preamp today, it's no longer working.
Anyone want it? I've standardized on Angle Linear; this ARR is one of the
few I still have in service and I have no interest in getting it repaired..
If you want it, call ARR and get an RMA number for the repair on Monday
GaAsFET - free, not working
I'll take it...
Bryon Jeffers KØBSJ
'Jeff DePolo' wrote:
I pulled out an ARR P432VDG GaAsFET preamp today, it's no
longer working.
Anyone want it? I've standardized on Angle Linear; this ARR
is one of the
few I still have in service and I have
I did a check on the can with the original stub, it had
a broad notch at 238 MHz (in addition to the tunable smaller
notch at the 154 mhz).
The notch you're seeing at 238 is the effect of the shorted stub (I think
you said it was shorted, correct me if I'm remembering wrong). Your
What Jeff recommends is adjusting the
impedance matching
device and/or the power setting so as to optimize the
efficiency. In other
words, get more power to the antenna and reduce the amount of internal
heating. It may turn out that the point of optimum efficiency
is not at the
rated
Chuck's got you going down the right path. At 51 MHz, you probably only
have to take one turn off of each of the first two coils. At 52 MHz or
higher, you might have to take off two. You need a lot of heat to get the
casting open (hint: a soldering gun, even a 300 watt Weller, ain't gonna cut
Ok, now lets do the opposite. Set the spec analyzer to 147.1 tune
it up. Set up the sig gen @ 147.7 UH OH, 2.5dB loss.
The stubs (which I take it you removed) alter the pass response. They're
really notch cavities. Adding the stubs will change the response adjacent
to the notch from high
An outboard Z-matcher works as well as the internal one on an M2 station PA;
it shouldn't matter where along the transmission line it's placed.
If you're looking for Z-matchers, there are two Decibels (one VHF, one UHF)
on eBay right now for less money.
As has been beatened around on this list
Have you found that adjustments of power level output of the
MastrII PA
has required much retuning of the Z-matcher? I have a plan that may
drop power output during power failures and I'm wondering how the
z-matcher might affect things.
Yes, the match will vary as output power is varied.
ways from sideways... I'm just
wondering Why? What am I missing here...?)
--
Nate Duehr, WY0X
n...@natetech.com
On Thu, 25 Jun 2009 11:05 -0400, Jeff DePolo
j...@broadsci.com wrote:
Have you found that adjustments of power level output of the
MastrII PA
would be
perpendicular to a line drawn as described. I can scan a page from
the Sinclair instruction sheet to back up this statement.
Paul N1BUG
Jeff DePolo wrote:
If all of the elements are parallel as in your photo, then it's
bi-directional. If you drew a line through one element
You can't get there from here.
Trying to add the yagi to the omni using power division topside isn't going
to yield easily-predictable results. You'll have all kinds of pattern
interaction between the two, with new nulls falling in quasi-random areas
lacking sophisticated modeling.
Your best
If all of the elements are parallel as in your photo, then it's
bi-directional. If you drew a line through one element, through the mast,
and through the other element, maximum radiation would be along that axis.
If the elements are staggered such that each bay pair is rotated 90 degrees
from
That's the most-likely cause (wrong input).
Other thing is that once the squelch opens, it will no longer auto-hunt if
memory serves. Make sure the squelch is closed (and, if you haven't
already, make sure you're on FM DEMOD in the AF Analyzer screen).
Radar buzz (colloquial name around here is the bees). We get it quite
often here in eastern PA/NJ/DE/MD/NY. 440 propagation has been a bit
enhanced today (I wouldn't say wide open), but hearing stations in NYC and
LI here in Philly.
--- Jeff
-Original
The 97 series will work OK in the ham band. The twisted wire hybrids are
rated for 450-512 MHz, so the balance may be a little off, and the isolation
degraded a bit. I have a few in service. I found that if you run them at
rated output that collector burns (solder joint fails due to repeated
I was about to order some Sinclair dipole arrays for upcoming projects
(SD318 series 8-bay UHF). Last time I ordered one, probably 5 or 6 years
ago, I thought it was around $1400. This time, all of my usual vendors are
giving me quotes over $2,000???!? Did Sinclair have a big price jump over
For fiberglass, RFS still makes the SuperStationmaster for 220 (model #
220-8). Telewave (ANT220F6) and Sinclair (SC229 series) also still make
fiberglass omnis for 220.
Sinclair (SD212, SD214, SD218), Telewave (ANT220 series) and Comprod (87x
series and 88x series) make 220 dipole arrays.
/Tech Midstate Communications
1st Lieut, S.T.V.F.D.
KB3DOL
www.midstatecomm.com http://www.midstatecomm.com
http://stvfd.homestead.com/ http://stvfd.homestead.com/
www.repeater.net/n2hlt http://www.repeater.net/n2hlt
--- On Tue, 6/2/09, Jeff DePolo j...@broadsci.com wrote
What didn't go way up?
The number of digits to the left of the decimal point in my checking account
balance hasn't gone up. I'm still waiting for all of that stimulus package
trickle-down money that our new president promised me.
Jumping in price by 50% over the course of a few years seems
I think for a while Cushcraft was using a different name for some of their
commercial products, and the name was something like Com Prod or
Communication Products or something similiar (I think I saw it used in a
Tessco catalog), but I'm quite certain that the current Laird/Cushcraft
products are
Some of Comprod's cavity filter products look a lot like TX-RX, but not all.
They make a line of duplexers and filters that are square cavities, more
like EMR's. TX-RX does make some square cavities; I have some square TX-RX
cavities that are high-power models for 900 MHz paging.
I have a
I'm looking for preamps for GE Delta-S radios, both highband and UHF. Can
use a few of each. Yes, I know I could graft in a different preamp, but I'm
looking for original parts.
19C850692G3 UHF
19C850696G3 VHF
Have stuff to trade or cash.
--- Jeff WN3A
I am looking for a UHF antenna design to null out
transmissions roughly in an easterly direction, but I would
like to keep the antenna as unsightly as possible since it's
located on a building where it could be easily seen, not on a
tower where it wouldn't matter. Any websites out there
OK, I guess it's about time I asked this. Is there someplace I can
find a reference on various connector types (plated or not, type of
plating) vs PIM/IMD/noise in duplex systems and/or in high RF
environments? I am looking at replacing my run of LDF5-50A and
wonder what type of
This leads me to a question that I have had on my mind. How
are people
doing desense testing with D-Star systems? (Remember, it's digital.)
73, Joe, K1ike
How about this - record a clean D-Star transmission (not decoded, just the
raw output from an FM receiver) on a PC with a good sound
Our group (WN3A, KA9FUR, KA3LAO, N9QOO, et al) will be in spaces 2368-2370
this year (different spots than previous years for those that stop by
annually). Stop by for 807's and good deals on repeater related stuff.
--- Jeff WN3A
OK GE Mastr II experts, I have a question for you. Our club
has been the benefactor of a local law enforcement agency's
upgrade. We have acquired a VHF (155 mHz) Mastr II base
station with 3 solid state PAs that total a rated output
power of 225 watts. It appears to have a single PA power
How are you soldering the braid (or how are you removing the
goop prior
to soldering it)?
Ed Yoho
W6YJ
I use trichloro, but there are other solvents that would probably work too.
--- Jeff
Are you referring to trichloroethylene, or to trichloroethane, or to
trichlorotrifluoroethane, or to something else? They are
definitely not the
same solvents, and they have different applications. Some
solvents whose
chemical names begin with trichloro are quite toxic and have high
Is there a source for VB-11 and VB-83 coax out there?
Or is there an equivalent cable from someone else? and of
course what were the impedances and constants and the like of them?
VB-11 is a flooded-braid version of regular RG11 (VB = VaporBlock in
Decibel's vernacular). Be careful
You're probably looking for this one.
http://www.fcc.gov/eb/AmateurActions/files/2007_04_12_10_26_52.pdf
--- Jeff
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Mike
Besemer (WM4B)
I've been reading up on
How to Modify a Sinclair Q2220E 132-174 MHz Duplexer to 220 MHz
as Dave C has done.
Where/who supplies these connectors..
73 John
VK4JKL IRLP 6163
Delta Electronics - www.deltarf.com
http://www.deltarf.com/results/p60.pdf
--- Jeff WN3A
I suppose one could dismantle a dash 1 duplexer to see what
the difference
is that makes it work so well on 440, and then use that knowledge to
field-modify a dash 2 duplexer- or better still, publish that
information
for the benefit of others. Any takers?
73, Eric Lemmon WB6FLY
I'll
If you don't have a telco metering setup (line-man, transmission
line tester tims) the levels across the phone line can be
read with any decent AC volt meter.
Just be careful, some DMM's, even good ones, don't have accurate AC voltage
measurement above a few hundred Hertz. I have a
The classic textbook method would be to put a current shunt in series with
your DC source and measure the voltage drop across it. A current shunt is
just a precision low-value resistor capable of handling the thru-current,
nothing fancy about it.
But, at low voltages (like 12V) and low
Did you test the db408 with both db404's harnessed and
working together?
No, I tested the upper and lower halves seprately. I have some used DB408's
(not the dual version) that I'll try to sweep later.
If the elements are flat (not tubing), then it's a DB410. They stopped
making them probably in the early 80's?
--- Jeff
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of k5in
Decibel antenna was around 1978-81
(they used tubing), so I can't say with any certainty.
Chuck
WB2EDV
- Original Message -
From: Jeff DePolo mailto:j...@broadsci.com
To: Repeater-Builder@yahoogroups.com
mailto:Repeater-Builder
But the feed harness would be a bit more difficult for 6
pairs (or 6 single
elements).
Nah, not really. You can power-divide into any number of branches, there's
nothing sacred about multiples of two's.
And, the original post indicated he had an antenna that had 6 single
elements, I
Installing a VHF base station using a brand new RFS Cellwave
Omni Antenna. The label says the antenna is now made in Denmark.
Appears to be very well made... just interesting to learn it
was made in Denmark.
cheers,
s.
That's odd, last week I picked up a case of Carlsberg pilsner
I was going to guess Motran, but it's been so long since I've seen one I
can't be sure.
Take the paper target and the power supply out to a rifle range and go
Office Space on it.
--- Jeff
-Original Message-
From: Repeater-Builder@yahoogroups.com
, 40 inches off the
side of a tower?
Brian, k5in
- Original Message -
From: Jeff DePolo mailto:j...@broadsci.com
To: Repeater-Builder@yahoogroups.com
mailto:Repeater-Builder@yahoogroups.com
Sent: Sunday, March 22, 2009 2:49 PM
Subject: RE
Hi Jeff, that's interesting data.
I was more curious whether or not you had any antennas easy to add to
the tests, or any locals nearby with different types of Sinclairs
around/available to add to the data while you have the test range
setup, so to speak.
Not important enough to go
If it was originally a 450-470 MHz model, it will work fine at 444/449
without any modifications. If it was for one of the other bandsplits, then
you'll need to re-do the harness if you want it to meet spec.
--- Jeff WN3A
-Original Message-
From:
-
From: Jeff DePolo j...@broadsci.com mailto:jd0%40broadsci.com
To: Repeater-Builder@yahoogroups.com
mailto:Repeater-Builder%40yahoogroups.com
Sent: Wednesday, March 25, 2009 11:41 AM
Subject: RE: [Repeater-Builder] Re: Decibel dipole array sweeps
I can measure one, but it should be about
Jeff,
I know you know more about this than I do; maybe you can tell
me why I've
seen this. In the past, I've modeled a simple 4el yagi to
answer this same
question for myself: does a conductive mast, placed behind
the reflector
element, affect the yagi's pattern or feedpoint Z? The
Are you using the PM exciter or PLL exciter on the M2? If PM, switching to
PLL will reduce the transmitter noise supression requirement of your
duplexer by 22 dB.
Otherwise, your best bet is to add another pass/reject cavity to each side
of the duplexer closest to the repeater equipment (i.e.
I'm in the process of putting up a remote receiver for a 440 ham repeater
using a Decibel DB413 dipole array cut for 450-470 MHz. Since
Decibel/Andrew stopped making the 440-450 MHz custom models, I've used the
usual 450-470 split antennas for receive sites, and they've performed well.
I swept
Boy, Yahoo really mangled the URL, even though I put it in angle brackets.
Let's try re-naming the file without spaces, maybe that will work...
http://www.broadsci.com/AntennaSweepsR1.pdf
Bob - the file opened fine for me, both locally and from the web site. I'm
using Acrobat 9.0. The
I'm almost positive that it's a Celwave, not a Sinclair, but I don't
recognize that exact part number. Their tunable low-pass filters (actually
second harmonic notch filters) had part numbers like AF150-T which was for
highband VHF (the 150 being the nominal center of the passbasnd frequency,
For a parallel-fed (aka binary-fed, corporate-fed, etc.) antenna, if all of
the elements are fed in-phase (i.e. the branches in the phasing harness are
all the same length), as it typical with most dipole arrays, there won't be
any uptilt/downtilt as you vary the transmitter frequency outside of
design range.
73, Joe, K1ike
Jeff DePolo wrote:
I tested these antennas with them mounted above ground
level, and away from
nearby objects, with the Sitemaster connected right to the
pigtail so what
you're seeing is the true return loss at the feedpoint.
No virus found
The link in Doug's email below still has spaces in it (%20 hex ASCII for
space character). Use the revised name I sent out that doesn't have spaces
in it:
http://www.broadsci.com/AntennaSweepsR1.pdf
--- Jeff
-Original Message-
From:
It wouldn't suprise me if the VSWR wasn't terrible since you'd be operating
the antenna at an odd multiple of its original design frequency. However,
the elevation pattern will likely be a mess. In other words, it may look
just dandy on the Sitemaster, but under-perform by a whole lot out in
In general, the loss in the feedline will only make the return loss look
better. If you have an antenna with a 14 dB return loss at the frequency of
interest at the feedpoint, and connect it to a feedline that has 2 dB of
loss, the return loss will be 14dB + 2 x 2dB = 18 dB looking into the
I'd be interested in seeing what you have. Back in the old days of Decibel,
they would send you good info if you were able to get to the right person.
I haven't had that kind of success since Andrew bought them out.
Just this week I came across a non-catalog Decibel antenna on a tower (the
one
Re-reading your message about downtilt antennas brought back a distant
memory. I was putting up a new 440 ham repeater, and grabbed a used DB408
out of the stash, checked the tag, and it said 450-470 MHz. A quick sweep
on the Sitemaster looked fine, so off I went.
A few hours later I get to
I'm modeling a half-wave dipole with the bottom .25 wavelength (at
145MHz) above zero, with five meters added from the bottom. This
antenna, five plus meters above ground, shows that when
transmitting at
165MHz, the highest point of gain is a lower degree of elevation than
when
Sent: Sunday, March 22, 2009 6:52 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Decibel dipole array sweeps
On Mar 22, 2009, at 12:32 PM, Jeff DePolo wrote:
The antennas I tested in this first batch are:
DB413, 450-470 MHz
DB408D, 450-470 MHz
DB411, 450
Message -
From: Jeff DePolo j...@broadsci.com mailto:jd0%40broadsci.com
To: Repeater-Builder@yahoogroups.com
mailto:Repeater-Builder%40yahoogroups.com
Sent: Sunday, March 22, 2009 7:11 PM
Subject: RE: [Repeater-Builder] Decibel dipole array sweeps
I have a Sinclair 8-bay with half
On Sun, 22 Mar 2009, Jeff DePolo wrote:
Wait. You're saying that a center-fed dipole has a major
lobe that's
not exactly perpendicular to the element? Something's amiss.
It's a theoretical antenna over a real ground. In free space,
the lobes
are closer to zero, but even over
Free space doesn't have a ground. Can you disable ground altogether
and see what the gain and pattern is?
Yes. It looks like what you'd expect a perfect antenna to look like.
What does it give you for the gain of a single half-wave
dipole with
no ground or support structure?
Bob. Always the trouble maker.
Try this HTML version. It was produced by Microsoft Word which has the most
god-awful HTML generator on the planet IMHO. I make no guarantees as to its
readability.
http://www.broadsci.com/AntennaSweepsR1.htm
--- Jeff WN3A
4 bay ..
Thanks to all for the help .. Getting ready to do Tower work
:) have to do it before the warm weather hits .. hihi
On Mon, Mar 16, 2009 at 7:34 PM, Jeff DePolo
j...@broadsci.com mailto:j...@broadsci.com wrote:
Rick
Go
...@yahoogroups.com] On Behalf Of Jeff DePolo
Sent: Tuesday, March 17, 2009 9:28 AM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: Andrews hard line help
Well, an L45W is nice and easy. It's one of the old-style
connectors that
has a thread-in center pin (the best
I second Skipp's motion, having been burned by Henry twice before, UHF amps
delivered without a low pass filter, second harmonic about -40 dBc in the
cell band...
Also, TPL manufactures 220 amps (I had one, Adam N2ACF has it now),
primarily for overseas markets. They use the same devices as in
No, a Mastr II receiver will not fit in an Exec II. While a lot of the
circuitry is similiar between the two, mechanically they're different.
--- Jeff WN3A
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com]
Hello to the group ... I need to run some new 7/8 hard line
and some 1/2 inch
Question is there any info on installing the ends on both I
did a google search and not luck
any help would be great and also any special tools ?
It's easier if you have Andrew's tools (or whoever's), but
Rick
Go to the files section and there is a file there Andrew
bulletin 37383C.pdf that is the instruction sheet for connectors.
Craig
That sheet is for the early L4 series solder-type connectors; it may or may
not be applicable to the original post since we don't know which connectors
TX-RX would be my suggestion. My only pet peeve with TX-RX duplexers that
on the duplexers that use garden variety 4 cavities is that they have BNC
connectors instead of type N. If you opt for their Type N connector
upgrade, you just get three BNC to type N adapters. Their larger
28-69-02A (or B), garden-variety 4 4-cavity pass/reject, fixed loops, BNC
connectors, the typical duplexer for 3 MHz split applications. The only
difference between A and B is the mounting brackets (one is front-mount, the
other has added brackets for rear-mount).
28-69-01A for 4-cavity 6-5/8
Jeff here you go
12
8 5/8
10
8 1/2
The two short ones are the cav conecters. the others are for the Tee.
Dave Ka9gfs
I went through four different varients of the square-cavity DB4076's here
and none of them have cable lengths that match yours. In all cases, the
cables going to
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