Nate,
My sincerest thoughts are with you in this time.
Don, KD9PT
- Original Message -
From: Nate Duehr
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, August 17, 2010 12:46 AM
Subject: Re: Properly designed PAs (was: Re: [Repeater-Builder] Coax length,
etc
To: Repeater-Builder@yahoogroups.com
Sent: Monday, August 16, 2010 10:46 PM
Subject: Re: Properly designed PAs (was: Re: [Repeater-Builder] Coax length,
etc.)
On Aug 15, 2010, at 7:06 AM, Jeff DePolo wrote:
Whoever said time is money was an idiot. Time is worth inifinitely times
On Aug 15, 2010, at 7:06 AM, Jeff DePolo wrote:
Whoever said time is money was an idiot. Time is worth inifinitely times
more than money. You can make more money. You can even borrow money.
Hell, if you were desparate you could even steal money. You can't do any of
those things with time.
On Aug 14, 2010, at 9:45 PM, Jeff DePolo wrote:
I disagree. I would accept the notion that the transmitter may not be
happy (and I put that in quotes not to mock you, but becuase I can't come
up with a better word either) because it is not *properly matched* when
looking into a 50+j0 load.
On Aug 14, 2010, at 9:45 PM, Jeff DePolo wrote:
Well, kinda. Many duplexers are spec'ed for 1.5:1 (14 dB RL) input VSWR
max. Fortunately, I rarely see any that are that bad. I'll gladly trade
off a tenth of a dB of insertion loss for several (if not 10 or more) dB of
return loss improvement
Hi Kevin:
Regarding temperature, our club has a site, no A/C or heat, where
temperatures inside the shelter can get below +20 deg F in winter, and
well over 130 deg F in the summer heat. I can't imagine filter tuning
not changing under such conditions, Invar or not. I can see over time
I don't know about that. Anritsu SiteMaster and CellMaster test sets
are fairly common test equipment available to cell techs here in
Connecticut. Whether they use them (or know how) is another thing.
Joe
On 8/15/2010 2:59 AM, Nate Duehr wrote:
What's up with the RF industry not buying
But why? If all of the power (or, let's hope, at least
99.99% of it)
is
on-channel, *should* a properly-designed and properly-functioning
transmitter misbehave due to the poor match a duplexer presents at
frequencies far removed from the channel center?
Well yes, properly
Actually I think that even though Service Monitors have
finally become *relatively* commonplace in the Ham Shack, the
VNA is not something most hams have seen or know how to use.
For $100, Rick's (Amtronix) return loss bridge is a must-have for anyone
that has a SM with a SA/TG. With it,
Jeff, out of all the PAs you've seen out there, both commonly
used and not-so-common... which ones (in your opinion) are
properly designed (when working right)?
I think a lot of them, generally speaking, are properly designed. That's
not to say that some of them don't have some downsides or
I've brought that issue up a few times, and usually get the blank radio shack
salesman type of stare.
-- Original Message --
Received: Sat, 14 Aug 2010 08:45:47 PM PDT
From: Jeff DePolo j...@broadsci.com
There is no simple rule of thumb, and if anybody tells you that there is,
ask
Russ,
Of course the Bird 43 does not measure power directly. But it does sample
voltage AND current on the line in amounts that are combined to indicate
power.
It is a directional coupler. The only time you will have a problem with it
deviating from its accuracy is when the directivity
Agreed!!
Mark - N9WYS
-Original Message-
From: Repeater-Builder@yahoogroups.com On Behalf Of Eric Lemmon
(major snippage)
This discussion is both informative and quite entertaining!
73, Eric Lemmon WB6FLY
I see some folks are heading for the Advil. My apologies.
Thanks, Gary, for admitting the 43 doesn't measure power directly. One
myth down.
Of course, it is a directional coupler, no argument. That makes it a
reflectometer, it enables the instrument to isolate forward/reflected
samples
Hi again Russ,
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Russ Hines
Sent: Sunday, August 15, 2010 4:54 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Coax length, etc.
I see some folks
, August 15, 2010 4:54 PM
*To:* Repeater-Builder@yahoogroups.com
*Subject:* Re: [Repeater-Builder] Coax length, etc.
I see some folks are heading for the Advil. My apologies.
Thanks, Gary, for admitting the 43 doesn't measure power directly.
One myth down.
Of course, it is a directional
Russ Hines wrote:
Hi Kevin:
Regarding temperature, our club has a site, no A/C or heat, where
temperatures inside the shelter can get below +20 deg F in winter, and
well over 130 deg F in the summer heat. I can't imagine filter tuning
not changing under such conditions, Invar or not. I
, August 15, 2010 7:37 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Coax length, etc.
Last round. Hi again, Gary. ;-)
On 8/15/2010 7:09 PM, Gary Schafer wrote:
Hi again Russ,
_
From: mailto:Repeater-Builder@yahoogroups.com
Repeater-Builder
I know I'm going to regret stepping into this one, but since when has that
stopped me before...
Thanks, Gary, for admitting the 43 doesn't measure power
directly.
What do you mean by measure power directly? If you're talking about
comparing a thruline measurement against
*From:* Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] *On Behalf Of *Russ Hines
*Sent:* Sunday, August 15, 2010 7:37 PM
*To:* Repeater-Builder@yahoogroups.com
*Subject:* Re: [Repeater-Builder] Coax length, etc.
Last
Because the impedance is not matched between the transmitter
and duplexer, the 'apparent' loss of the duplexer is greater
than the manufacturers stated loss of the duplexer. Changing
the cable length is not changing the loss of the duplexer,
it's changing the power that is accepted at
: [Repeater-Builder] Coax length, etc.
Because the impedance is not matched between the transmitter
and duplexer, the 'apparent' loss of the duplexer is greater
than the manufacturers stated loss of the duplexer. Changing
the cable length is not changing the loss of the duplexer,
it's changing
On 8/14/2010 8:44 AM, Jeff DePolo wrote:
But if the duplexer is tuned to 50 ohms, and the cable is 50 ohms, varying
the cable length isn't going to change the Z seen by the transmitter. Or
are you suggesting the duplexer is purposely de-tuned from 50 ohms?
I use a Network Analyzer to tune
Jeff DePolo wrote:
Because the impedance is not matched between the transmitter
and duplexer, the 'apparent' loss of the duplexer is greater
than the manufacturers stated loss of the duplexer. Changing
the cable length is not changing the loss of the duplexer,
it's changing the power that is
Kevin Custer wrote:
Joe Ham buys a new duplexer and hooks it up to his 110 Watt MASTR II
repeater and gets 50 watts out the antenna port. He does his homework
and realizes that he should only be loosing 29%
Wow -* loosing -* that should have been losing - that's what I get for
being in a
Kevin Custer wrote:
I had one instance of a ham radio club loosing PA's left and right on
their 2M machine.
Indeed - I am loosing my mind - grin
K
-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Kevin Custer
Sent: Saturday, August 14, 2010 10:15 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Coax length, etc.
Kevin Custer wrote:
Joe Ham buys a new duplexer
So will someone post a simple rule of thumb. If you have the option of
optimizing cable length from PA to first cavity, IE you haven't made
them yet what's the best simple rule of thumb to follow to build them
to avoid reactance. 1/2wl if allowed minus coupling loop depth? Or is
that past a simple
Subject: RE: [Repeater-Builder] Coax length, etc.
So will someone post a simple rule of thumb. If you have the option of
optimizing cable length from PA to first cavity, IE you haven't made
them yet what's the best simple rule of thumb to follow to build them
to avoid reactance. 1/2wl if allowed
That's because there are as many rules as there are thumbs. ;-)
I don't know about anyone else, but I can tell you about the highly
scientific method I use.
I start with a multiple of 1/2 electrical wavelength and trim as
necessary. I'd stay away from an odd-multiple of 1/4 wavelength in
Some related comments, if you don't mind.
Temperature changes seem to be the biggest detuner of largely
mechanical devices like cavity duplexers. We often send our repeaters
off to live in less-than-ideal environments, then expect cavity
input/output impedances to remain as we measured them
@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Russ Hines
Sent: Saturday, August 14, 2010 4:30 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Coax length, etc.73
Some related comments, if you don't mind.
Temperature changes seem
Russ Hines wrote:
Some related comments, if you don't mind.
Temperature changes seem to be the biggest detuner of largely
mechanical devices like cavity duplexers. We often send our repeaters
off to live in less-than-ideal environments, then expect cavity
input/output impedances to remain
Ross Johnson wrote:
So will someone post a simple rule of thumb... If you have the option
of optimizing cable length from PA to first cavity, IE you haven't
made them yet what's the best simple rule of thumb to follow to
build them to avoid reactance. 1/2wl if allowed minus coupling loop
Jeff, you aren't stepping on my toes at all. Glad to see your
comments.
OK, good. Since you've never met me, I can assure you, you definately DO
NOT want me stepping on your toes, it would be painful.
I do have to agree with Kevin that most duplexer
manufacturers recommend different cable
So will someone post a simple rule of thumb. If you have the
option of optimizing cable length from PA to first cavity, IE
you haven't made them yet what's the best simple rule of
thumb to follow to build them to avoid reactance. 1/2wl if
allowed minus coupling loop depth? Or is that past
OK, I think, for the most part, we're on the same page. I'm cuttin' and
trimmin' a lot here...
And this is where I believe the duplexer manufacturers are
covering their butt. They don't want the problem with
complex reactance presented by the duplexer to be their
problem. Not that I
-Original Message-
From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
buil...@yahoogroups.com] On Behalf Of Jeff DePolo
Sent: Saturday, August 14, 2010 10:45 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Coax length, etc.
Jeff, you aren't
I must have missed some posts - my inbox ran out of space (I'm on the road
and not checking email as often as I usually do), so my apologies if I'm
asking questions that have already been answered...
Allan Crites and I are currently in discussion which will
be used as the basis of a RB web
Jeff DePolo wrote:
Maybe I'm not understanding right. Are you saying that by varying the cable
length between the transmitter and the duplexer that you can affect the
insertion loss of the duplexer?
No.
Because the impedance is not matched between the transmitter and
duplexer, the
The cable length issue is a brother to if you don't like
your VSWR, change the point along the transmission line where
you're measuring it.
I don't know what that's supposed to mean. The VSWR on the line is the same
no matter where along the line you measure it. If you're using a meter
And a new perspective on transmission lines.
I didn't think it was worth responding to, Jeff.
AC WA9ZZU.
From: Jeff DePolo j...@broadsci.com
To: Repeater-Builder@yahoogroups.com
Sent: Fri, August 6, 2010 8:23:09 AM
Subject: RE: [Repeater-Builder] Coax length
Grab your Smith chart! LOL
- Original Message -
From: allan crites
To: Repeater-Builder@yahoogroups.com
Sent: Friday, August 06, 2010 12:46 PM
Subject: Re: [Repeater-Builder] Coax length, etc.
And a new perspective on transmission lines.
I didn't think
*To:* Repeater-Builder@yahoogroups.com
mailto:Repeater-Builder@yahoogroups.com
*Sent:* Fri, August 6, 2010 8:23:09 AM
*Subject:* RE: [Repeater-Builder] Coax length, etc.
The cable length issue is a brother to if you don't like
your VSWR, change the point along the transmission
Hi Kevin and all who responded to my question.
Thank you, good info in the link provided by Kevin along with other
interesting guidelines. More for the file.
Regards,
Doug - GM7SVK
On 04/08/2010 11:04 PM, Kevin Custer wrote:
Doug Hutchison wrote:
Does the length of coax connecting
Thanks, guys, a good topic and one that always seems to come up. And
it sparks more questions and comments, of course.
The cable length issue is a brother to if you don't like your VSWR,
change the point along the transmission line where you're measuring
it. By changing the length of the
Russ Hines wrote:
Thanks, guys, a good topic and one that always seems to come up. And
it sparks more questions and comments, of course.
The cable length issue is a brother to if you don't like your VSWR,
change the point along the transmission line where you're measuring
it. By changing
Thanks for the reply, Kevin. I'm looking forward to seeing the article.
73, Russ WB8ZCC
On 8/5/2010 1:20 PM, Kevin Custer wrote:
Russ Hines wrote:
Thanks, guys, a good topic and one that always seems to come up. And
it sparks more questions and comments, of course.
The cable length
Does the length of coax connecting cable between repeater and filters
matter?
Doug
Doug Hutchison specialq@ntlworld.com wrote:
Does the length of coax connecting cable between repeater and filters
matter?
Doug
As long as the filters are working correctly, the cable length from the
duplexers to the radios tx and rx does not matter. Having said that, remember
Doug Hutchison wrote:
Does the length of coax connecting cable between repeater and filters
matter?
Yes - and no.
Please read the note about cabling lengths between the repeater and the
duplexer in the section on page 4 of the following document:
I will do sir, thank you Kevin.
Doug
On 04/08/2010 23:04:07, Kevin Custer (kug...@kuggie.com) wrote:
Doug Hutchison wrote:
Does the length of coax connecting cable between repeater and filters
matter?
Yes - and no.
Please read the note about cabling lengths between the repeater
At 8/4/2010 14:37, you wrote:
Doug Hutchison specialq@ntlworld.com wrote:
Does the length of coax connecting cable between repeater and filters
matter?
Doug
As long as the filters are working correctly, the cable length from the
duplexers to the radios tx and rx does not
04, 2010 10:22 PM
Subject: Re: [Repeater-Builder] Coax length
At 8/4/2010 14:37, you wrote:
Doug Hutchison specialq@ntlworld.com wrote:
Does the length of coax connecting cable between repeater and filters
matter?
Doug
As long as the filters are working correctly, the cable
Hi guys .I am just wanted to confirm a question on coax shielding .
With 2-10 watts transmitting through rg213u could rf be escaping that could
cause desensitization to other radios .The repeater I have setup uses 9
meters of heliax from the main diplexer to ant and rg213u from the link
radio
At UHF, possibly, at VHF unlikely... you did not specify :-)
How close are the frequencies??? Lots of details left out for us to help.
If the freq's are within a few hundred kiloherts at vhf, antenna
separation is probably the issue...
More details please??
Doug
KD8B
kerincom wrote:
Hi
To: mail=repeater-buil...@yahoogroups.com
Subject: [Repeater-Builder] Coax shielding
Hi guys .I am just wanted to confirm a question on coax shielding .
With 2-10 watts transmitting through rg213u could rf be escaping that could
cause desensitization to other radios .The repeater I have
or 0749922574
www.kerinvalecomaudio.com.au
---Original Message---
From: Doug Bade
Date: 6/28/2010 12:59:24 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Coax shielding
At UHF, possibly, at VHF unlikely... you did not specify :-)
How close are the frequencies
.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of kerincom
Sent: Sunday, June 27, 2010 7:51 AM
To: mail=repeater-buil...@yahoogroups.com
Subject: [Repeater-Builder] Coax shielding
Hi guys .I am
Subject: RE: [Repeater-Builder] Coax shielding
Ian,
RG-213 coax can definitely contribute to desense, as can cheap connectors
and adapters. I suggest making up new jumpers using double-shielded coax
such as RG-400 or RG-214, and fit these jumpers with high-quality, crimp-on
connectors of the correct
Ian;
It would seem that at uhf ~30mhz away cable leakage in the shed
would seem to be less likely than antenna to antenna interference. In
general it is the white noise generated by a transmitter on other
frequencies that is most likely to cause desense to a co located rx.
Assuming you
---
From: Doug Bade
Date: 6/28/2010 1:44:27 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Coax shielding
Ian;
It would seem that at uhf ~30mhz away cable leakage in the shed
would seem to be less likely than antenna to antenna interference. In
general it is the white
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Coax shielding
Ian;
It would seem that at uhf ~30mhz away cable leakage in the shed
would seem to be less likely than antenna to antenna interference. In
general it is the white noise generated by a transmitter on other
-Builder] Coax shielding
Ian;
It would seem that at uhf ~30mhz away cable leakage in the shed
would seem to be less likely than antenna to antenna interference. In
general it is the white noise generated by a transmitter on other
frequencies that is most likely to cause desense to a co
---
From: Doug Bade
Date: 6/28/2010 2:08:45 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Coax shielding
In theory most xtal radios are quieter than synthesized ones, but a
filter would seem to be the better thing to do as it really stops the
problem...even
mailto:Repeater-Builder@yahoogroups.com
/*Subject:*/ Re: [Repeater-Builder] Coax shielding
Ian;
It would seem that at uhf ~30mhz away cable leakage in the shed
would seem to be less likely than antenna to antenna interference. In
general it is the white noise generated by a transmitter on other
mailto:wb6...@verizon.net
Date: 6/28/2010 1:24:37 AM
To: Repeater-Builder@yahoogroups.com mailto:Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Coax shielding
Ian,
RG-213 coax can definitely contribute to desense, as can cheap connectors and
adapters. I suggest making up new
In part of an estate we're helping with, there are about 30 lbs of
coax connectors and adapters, UHF, N, RCA, F, SMA, BNC, et. al.
Some new, some used. Prices from 50-cents to about $3.00 for the
new ones. If interested, contact me offline and I'll send you a
list (too long to clutter up the group
List, please!
--
Max Kelley KC2SPY
www.maxkelley.com
On Fri, 2010-05-07 at 21:22 +, sjotrollet wrote:
In part of an estate we're helping with, there are about 30 lbs of
coax connectors and adapters, UHF, N, RCA, F, SMA, BNC, et. al.
Some new, some used. Prices from 50-cents to
looking for info on which type of coax cable to use for my GMRS repeater
ant will be 100 in the air
@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of bobeic2
Sent: Saturday, September 12, 2009 3:13 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] coax cable
looking for info on which type of coax cable to use for my GMRS repeater
ant will be 100 in the air
: [Repeater-Builder] Coax Cable - Question
Sounds mechanically similar to Times Microwave LMR-400 to me. I agree with
the other poster on using silver crimp-type connectors. I don't like the
cheaper chrome/nickel plated crimp connectors. The threaded portions tend to
flake when being
Remeber a dab of solder in case and some sealant like telstra strip strip
To: Repeater-Builder@yahoogroups.com
From: spar...@gmail.com
Date: Mon, 2 Mar 2009 22:02:54 +1300
Subject: Re: [Repeater-Builder] Coax Cable - Question - THANKS FOR REPLIES
To All
Hi Guys,
Sorry about addressing this question here, but I know it has been talked about
before and I know there is a lot of knowledge from experence hooking up
repeaters.
Okay, my question.
At my work they have been installing and upgrading our wireless Lan systems.
In the process of the
Of Gmail - Kevin,
Natalia, Stacey Rochelle
Sent: Sunday, March 01, 2009 8:29 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Coax Cable - Question
Hi Guys,
Sorry about addressing this question here, but I know it has been talked
about before and I know there is a lot of knowledge
: Monday, March 02, 2009 5:49 PM
Subject: RE: [Repeater-Builder] Coax Cable - Question
Kevin,
It will probably be okay in a non-duplex application. Belden 7810A cable is
a variant of RG-8 and has a #10 solid aluminum center conductor with a
copper cladding. The shield comprises a tinned copper
(obviously nothing in radio years, but.)
JS
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of Gmail - Kevin,
Natalia, Stacey Rochelle
Sent: Sunday, March 01, 2009 10:29 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder
JS
may I ask, could you expand on the brand of or link to:
quote
automotive “gasket maker”
end quote
tnx
John VK4JKL
Jacob Suter wrote:
Sounds mechanically similar to Times Microwave LMR-400 to me. I agree
with the other poster on using silver crimp-type connectors. I don’t
like the
http://www.eham.net/forums/StationBuilding/861
To: Repeater-Builder@yahoogroups.com
From: spar...@gmail.com
Date: Mon, 2 Mar 2009 17:28:32 +1300
Subject: [Repeater-Builder] Coax Cable - Question
Hi Guys,
Sorry about addressing this question here, but I
... just giving me the willies.
Nate
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of John J. Riddell
Sent: Wednesday, January 21, 2009 2:12 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Coax
I am wanting to swap out the BNC receiver connector to an N
connector on my Kenwood TKR-750 2 meter repeater. After contacting
Kenwood and getting quoted some crack prices I figured I'd see if
anyone has anything laying around or has any ideas on here.
I've got the BNC Connector and the
At 08:42 AM 1/21/2009, Alexander N Tubonjic wrote:
I am wanting to swap out the BNC receiver connector to an N
connector on my Kenwood TKR-750 2 meter repeater.
My first and only question is why?
Ken
--
Alex,
I have had over 30 of these repeaters in use and never ran into a problem using
the BNC. I would leave well enough alone if it were me. If you do this you wont
take care of the issue you may be thinking your going to fix by doing so.
I have a 5 ch system UHF LTR on Cheyenne Mt just
Alexander N Tubonjic wrote:
I am wanting to swap out the BNC receiver connector to an N
connector on my Kenwood TKR-750 2 meter repeater. After contacting
Kenwood and getting quoted some crack prices I figured I'd see if
anyone has anything laying around or has any ideas on here.
Why?
: Re: [Repeater-Builder] Coax Interconnect (Inside Repeater)
Alexander N Tubonjic wrote:
I am wanting to swap out the BNC receiver connector to an N
connector on my Kenwood TKR-750 2 meter repeater. After contacting
Kenwood and getting quoted some crack prices I figured I'd see if
anyone has
John J. Riddell wrote:
Mike, the BNC connector was designed for quick
insertion / disconnect and works very well in most applications.
I keep forgetting why I don't post here very often. You're absolutely
correct John. I never said that they were permanent substitutes for each
other, I
-Original Message-
From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
buil...@yahoogroups.com] On Behalf Of Mike Pugh
Sent: Wednesday, January 21, 2009 4:39 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Coax Interconnect (Inside Repeater)
John J
cabling we
always used BNC and the wideband tape recorders were always delivered with BNC
connectors.
73 - Jim W5ZIT
--- On Wed, 1/21/09, Mike Pugh mikep...@mikepugh.net wrote:
From: Mike Pugh mikep...@mikepugh.net
Subject: Re: [Repeater-Builder] Coax Interconnect (Inside Repeater)
To: Repeater
and may I ask why? is there a problem with the factory set up?
thanks
- Original Message -
From: Alexander N Tubonjic
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, January 21, 2009 11:42 AM
Subject: [Repeater-Builder] Coax Interconnect (Inside Repeater)
I am
At 1/21/2009 10:10, you wrote:
There is a reason why Kenwood engineers made the repeater with the BNC and
not a N Connector.
Cost.
BTW you can use RG-214 with BNCs, but I wouldn't hang 6 ft. of RG-214
perpendicularly off of one. I use RG-223, try to keep the lengths down
to 3 ft. if it's
At 1/21/2009 15:13, you wrote:
One caveat: While a type N male will plug into a BNC female, the N center
pin is a little larger than that of a BNC. Doing this will expand the
sleeves in the female BNC and when you go to put a BNC male back in (with
the smaller pin) it may not make good contact
If anybody is looking for a killer deal on RG142 coax jumpers you may want
to check these out on EBay before you build them. You cant even get the
connectors and cable for this price and there new.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem
@yahoogroups.com
Subject: RE: [Repeater-Builder] Coax Help
No problem on the link, Mike. Glad it as the same stuff!
A 1/4-wave cable on an open circuit introduces a short... If I remember
correctly (and I'm sure if I'm wrong others will correct me!) you need a
1/2-wave cable between cans.
Mark
Mike,
Are there any other markings on the cable? Specifically, I'd be looking for
the following:
FSJ1-50A
This is 1/4 Superflex - about the same size as RG-8X...
Velocity factor for this (FSJ1-50A) cable is 84%
http://awapps.commscope.com/catalog/product_details.aspx?id=1342
Mark - N9WYS
7:01 AM
Subject: RE: [Repeater-Builder] Coax Help
Mike,
Are there any other markings on the cable? Specifically, I'd be looking for
the following:
FSJ1-50A
This is 1/4 Superflex - about the same size as RG-8X...
Velocity factor for this (FSJ1-50A) cable is 84%
http://awapps.commscope.com
@yahoogroups.com
Sent: Wednesday, October 01, 2008 7:01 AM
Subject: RE: [Repeater-Builder] Coax Help
Mike,
Are there any other markings on the cable? Specifically, I'd be looking for
the following:
FSJ1-50A
This is 1/4 Superflex - about the same size as RG-8X...
Velocity factor for this (FSJ1-50A) cable
Howdy;
I was given today 2 pieces of mini-hardline marked Andrews Type
204909. It is the size of mini-8. I think this is 50 ohm, but what
would be the velocity factor of it? I want to use it to make lines for
146.7/146.1 and 443.3/448.3 between radio and cavitys. Putting on the
ends, does it
you.
Mike
WM4B
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED]
Sent: Wednesday, September 24, 2008 12:14 AM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] coax length
John,
Very well then, I guess I need to be shopping
Collin,
A guy local to me (WD9HSY) sells them - rated at 200W - on a certain auction
site. Normal cost is about $59.00. If you do a search for dummy load it
will pop up for you. Although not costing an arm and a leg these might
qualify for a finger or two... ;-)
They are very nice loads...
--- On Wed, 9/24/08, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
From: [EMAIL PROTECTED] [EMAIL PROTECTED]
Subject: Re: [Repeater-Builder] coax length
To: Repeater-Builder@yahoogroups.com
Date: Wednesday, September 24, 2008, 12:14 AM
John,
Very well then, I guess I need to be shopping
1 - 100 of 232 matches
Mail list logo
