plot.
See Electronic Applications of the Smith Chart in Waveguide, Circuit, and
Component Analysis by Phillip H. Smith, Chapter 9, Waveguide and Impedance
Matching, P. 97.
Allan Crites wa9zzu
--- On Wed, 8/18/10, n5qs ygr...@white-tiger.org wrote:
From: n5qs ygr...@white-tiger.org
Subject
.
Allan Crites wa9zzu
From: Sid purvis...@yahoo.com
To: Repeater-Builder@yahoogroups.com
Sent: Fri, August 13, 2010 10:38:25 AM
Subject: [Repeater-Builder] Re: Coax length, etc.
I have a note in my file that I do not recall where it came from relative
From:Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com]
On Behalf Of allan crites
Sent: Friday, August 13, 2010 12:56 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: Coax length, etc.
Nate,
I have both the 12th and 14th edition of the ARRL Antenna
efficiency/current draw if
everything else was done right from the get-go.
--- Jeff WN3A
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of allan crites
Sent: Friday, August 13, 2010 5:41 PM
To: Repeater-Builder
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,
and is more likely to be highly + or -X therefor not absorbing or accepting
any
input signal and your analysis lacks merit.
Allan Crites WA9ZZU
From: Kevin Custer kug...@kuggie.com
To: Repeater-Builder@yahoogroups.com
Sent: Mon, July 26, 2010 3:47:08 PM
I sure did. Thanks to you Jeff for your response and my sincerest apology to
Kevin.
I did the calculation four times and got the same wrong answer four times
before
I hit the send button.
Only after I sent did I redo the calculation on another calculator and was I
horrified to learn of my
to the parts
department by myself.
Allan Crites WA9ZZU
From: Oz-in-DFW li...@ozindfw.net
To: Repeater-Builder@yahoogroups.com
Sent: Sun, July 25, 2010 9:34:35 PM
Subject: Re: [Repeater-Builder] Anybody have a clue ?
On 7/25/2010 2:37 PM, Mike Morris wrote
Kuby,
You might start with Electronic and Radio Engineering by Frederick Emmons
Terman, 4th Ed. 1955 in the Circuit Elements and Circuit Theory section.
And try Radio Engineering Handbook by Keith Henny, 5th Ed. 1959 in Chapter
6, Wave Guides and Resonators by Harald Schutz.
Also Principals
@yahoogroups.com
Date: Monday, May 31, 2010, 8:09 PM
You forgot the most important text:
Microwave Spectroscopy by Townes Shalow.
73, Dick, W1KSZ
-Original Message-
From: allan crites wa9
Allan Crites WA9ZZU
--- On Tue, 5/11/10, NORM KNAPP nkn...@twowayradio.net wrote:
From: NORM KNAPP nkn...@twowayradio.net
Subject: Re: [Repeater-Builder] DB 224E Harness wanted
To: Repeater-Builder@yahoogroups.com
Date: Tuesday, May 11, 2010, 9:09 PM
How long tip to tip on the dipole loops
limited.
Dave
- Original Message -
From: allan crites
To: Repeater-Builder@ yahoogroups. com
Sent: Monday, May 10, 2010 12:17 AM
Subject: Re: [Repeater-Builder] Commercial VHF antenna on 2m
Dave, maybe I can help you with your impedance matching if you could provide me
div class=plainMailInserting a tee connector in an arbitrary point on a
transmission line with an open or short circuited stub to obtain an acceptable
reduction in the VSWR on the line is next to impossible and is typically an
exercise in futility (which you apparently have learned).BRBRThe
the dipoles without compensating for the harness impedance
matching sections mismatch also.
Allan Crites wa9zzu
--- On Sat, 5/8/10, WA3GIN wa3...@comcast.net wrote:
From: WA3GIN wa3...@comcast.net
Subject: [Repeater-Builder] Commercial VHF antenna on 2m
To: Repeater-Builder@yahoogroups.com
Date
dipole type, just what makes you
suspect that there is a lot of loss when an
antenna made for 154 MHz is used at 146 MHz and how do
you expect to tune the dipoles without compensating for the
harness impedance matching sections mismatch also.
Allan Crites wa9zzu
--- On Sat, 5/8/10, WA3GIN
with it as it is ... just trying to make the
transmitter happy till a time
comes when we can either tweak the antenna or replace
it.
Thanks ,
dave
- Original Message
-
From:
allan crites
To: Repeater-Builder@
yahoogroups. com
Sent: Sunday, May
09, 2010 10:13 PM
with it as it is ... just trying to make the
transmitter happy till a time
comes when we can either tweak the antenna or replace
it.
Thanks ,
dave
- Original Message
-
From:
allan crites
To: Repeater-Builder@
yahoogroups. com
Sent: Sunday, May
09, 2010 10:13 PM
Jeff
Doesn't soldering of the center contact to the center conductor affect the
connector PIM adversely vs not soldering?
AC
A bigger problem would be getting the impedance matched with a harness since
the dipole feed point impedance when mounted on a pipe or tower is difficult to
know without having measured it. Getting a desireable radiation pattern is
important but not having the dipoles impedance matched to
What really needs to happen is for someone to design a transistor or FET RF
power doubler for all those 450 Mhz radios that will be coming or now surplus
on the commercial market. Then amateur 900 MHz would boom. Don't ask me to do
it, I don't have any time.
WA9ZZU
--- On Sun, 2/28/10, Mark
for more than half a
century provides me with enough empirical evidence that the techniques are
valid.
73,
Al, K9SI
Re: Ground plane yada yada
Posted by: allan crites wa9...@arrl. net wa9zzu
Date: Tue Feb 23, 2010 4:29 pm ((PST))
I appreciate the contribution of the information found in the ARRL
I appreciate the contribution of the information found in the ARRL April 1962
QST article, which I have reviewed, and the technical parameters of impedance
matching provided, however the information presented relates to the shortening
of a 1/2 WL simple dipole from the resonant freq. terminal
Skipp
I sure would be interested in what your version of a beta matched gnd plane
antenna which results in a 50 Ohm match looks like.
Could you, would you, provide us with a description or picture to satisfy my
curiosity?
Thanks,
a.
--- On Mon, 2/22/10, skipp025 skipp...@yahoo.com wrote:
: [Repeater-Builder] Re: Ground Plane and Dipole Diatribe
To: Repeater-Builder@yahoogroups.com
Date: Monday, February 22, 2010, 4:57 PM
allan crites wa9...@... wrote:
Skipp
I sure would be interested in what your version of a beta
matched gnd plane antenna which results in a 50 Ohm match
Principals of Radar, 3rd Ed. by J. Francis Reintjes and Godfrey T. Coate
Reference Data for Radio Engineers, 5th Ed. H.P. Westman, Editor
VHF - UHF Manual by D.S. Evans G.R. Jessop
A very good presentation Jeff.
I found no information what-so-ever to backup the 5% rule.
Allan Crites WA9ZZU
. freq. for the range 220-225 MHz
or whatever you measured?
There are no loops on a DB224, only folded dipoles. Loops are circular,
dipoles are linear.
Allan Crites WA9ZZU
--- On Fri, 2/19/10, Tom Manning af...@bellsouth.net wrote:
From: Tom Manning af...@bellsouth.net
Subject: Re: [Repeater
be great if you could figure out
what the open stub is for and can we use that for adjustments. If you need more
info, let me know.
73
Norm
_ _ __
From: Repeater-Builder@ yahoogroups. com on behalf of allan crites
Sent: Wed 2/17/2010 9:29 PM
To: Repeater-Builder
this?
Allan Crites WA9ZZU
--- On Thu, 2/18/10, Tom Manning af...@bellsouth.net wrote:
From: Tom Manning af...@bellsouth.net
Subject: Re: [Repeater-Builder] DB224A new harness
To: Repeater-Builder@yahoogroups.com
Date: Thursday, February 18, 2010, 4:58 PM
Hello Andrew and Norm
If you
I tried to work backwards on a Smith Chart from the dipole to the 1/2 WL O.C.
stub to determine a reason for the stub but it appears the unknown coax types
are causing erroneous and confusing answers.
Can you confirm the coax types shown on your diagram?
a.
--- On Wed, 2/17/10, NORM KNAPP
Joe,
The M9349 is an RCA 2N3525.
AC
--- On Sat, 2/6/10, Joe k1ike_m...@snet.net wrote:
From: Joe k1ike_m...@snet.net
Subject: [Repeater-Builder] PURC Lowband station SCR replacement
To: Repeater-Builder@yahoogroups.com
Date: Saturday, February 6, 2010, 5:07 PM
Just a long shot
We
Cheers,
The answer to all your questions is yes, aditionally the coax I used was Teflon
and I did not do any flexing of it as it was rather stiff, so I cannot answer
that question.
I also did a follow up on a further inquiry from Norm N5NPO which may provide
more info.
Allan Crites WA9ZZU
Tom
The 4 cable is a 1/4 WL and the O.C. stub parallel resonates the loop inside
the cavity to create a broad S.C. a 1/4 WL away fron the tee connector on the
main line.
Allan Crites WA9ZZU
--- On Mon, 2/1/10, kd4wov kd4...@earthlink.net wrote:
From: kd4wov kd4...@earthlink.net
Subject
Correction: I should have said at the Tee connector
Allan Crites WA9ZZU
--- On Mon, 2/1/10, allan crites wa9...@arrl.net wrote:
From: allan crites wa9...@arrl.net
Subject: Re: [Repeater-Builder] Re: length of cables for notch cans
To: Repeater-Builder@yahoogroups.com
Date: Monday, February
have any problems or questions I will be willing to help. Just ask.
Allan Crites WA9ZZU
--- On Mon, 2/1/10, NORM KNAPP nkn...@twowayradio.net wrote:
From: NORM KNAPP nkn...@twowayradio.net
Subject: Re: [Repeater-Builder] Re: Building a notch duplexer with notch cans.
To: Repeater-Builder
My extensive response to your question was deleted by my computer before I
could send it. Bummer.
I will try again tomorrow.
Allan Crites WA9ZZU
--- On Mon, 2/1/10, NORM KNAPP nkn...@twowayradio.net wrote:
From: NORM KNAPP nkn...@twowayradio.net
Subject: Re: [Repeater-Builder] Re: Building
dB with insertion loss of 0.6 dB at the pass freq with a pass to
notch freq. spacing of 1.5 MHz. On a HB cavity this would be something around
1.5 divided by 3 or 500 KHz. I would not expect this same performance using a
cavity with connectors.
Allan Crites WA9ZZU
--- On Mon, 2/1/10, NORM
.
Allan Crites WA9ZZU
--- On Sat, 1/16/10, Jim Brown w5...@yahoo.com wrote:
From: Jim Brown w5...@yahoo.com
Subject: Re: [Repeater-Builder] Celwave/Sinclair, etc. antenna conversion to
2-Meters?
To: Repeater-Builder@yahoogroups.com
Date: Saturday, January 16, 2010, 6:38 AM
I have
this information as the pigtail length may be different on your antenna
than on mine.
Allan Crites WA9ZZU
--- On Fri, 1/15/10, larryjspamme...@teleport.com lar...@teleport.com wrote:
From: larryjspamme...@teleport.com lar...@teleport.com
Subject: [Repeater-Builder] Celwave/Sinclair, etc. antenna
I would be extremely interested in reviewing either the measurements you have
made or any other such documentation which supports your statements.
Allan Crites WA9ZZU
--- On Fri, 1/1/10, hfarrenkopf hfarrenk...@yahoo.ca wrote:
From: hfarrenkopf hfarrenk...@yahoo.ca
Subject: [Repeater
Clairification - only one cavity connections was described, four cavities were
required for the DB HB duplexer. I regret the misinformation.
Allan Crites WA9ZZU
--- On Sun, 6/28/09, wa9...@arrl.net wa9...@arrl.net wrote:
From: wa9...@arrl.net wa9...@arrl.net
Subject: RE: [Repeater-Builder
Ron
I too would like to see the pictures,
Would you send them to me also at wa9...@arrl.net.
Thanks
Allan Crites WA9ZZU
--- On Mon, 6/29/09, NORM KNAPP nkn...@twowayradio.net wrote:
From: NORM KNAPP nkn...@twowayradio.net
Subject: Re: [Repeater-Builder] Sinclair Q202GC Duplexer Help
the response curves shown on the network analyzer and were
normally included with the duplexers shipped from Celwave to Motorola.
Allan Crites WA9ZZU
--- On Wed, 4/22/09, Eric Lemmon wb6...@verizon.net wrote:
From: Eric Lemmon wb6...@verizon.net
Subject: RE: [Repeater-Builder] Motorola RFS Celwave
section consisting of
series and shunt coax attached at the antenna feed-point coax will correct for
the mismatch occurring at lower freq(s). thus negating the need for any dipole
or harness modifications. (Been there, done it).
Allan Crites WA9ZZU
--- On Sat, 3/28/09, Steve Allred rff
Jim,
Perhaps you can explain to me why there is a propensity or misguided desire for
hams to use antennas designed for the 2M ( or 150-160 MHz) range as radiators
of RF energy at frequencies in the 440 MHz range.
Are there no people that realize that even though at 3X the designed
fundamental
W-doug
The discussion was centered on base to mobile operation - but thanks for your
comments anyway
--- On Fri, 11/28/08, ldgelectronics [EMAIL PROTECTED] wrote:
From: ldgelectronics [EMAIL PROTECTED]
Subject: [Repeater-Builder] Re: Replacement Dual-Band Antenna..
To:
Greg,
I have all the parts you could ever need or want for a Motorola TLD 1100
including the control head in various different colors.
Contact me direct for more info.
Allan Crites
--- On Wed, 10/22/08, greg huffman [EMAIL PROTECTED] wrote:
From: greg huffman [EMAIL PROTECTED]
Subject: RE
Or one could measure the XL of the loop assembly ( off the resonant frequency
of the tuned cavity), plot the measured results on a Smith Chart, determine
the WL towards .25 WTG on the circumference circle, and subtract that length in
the coax dilectric, from the 1/4 WL coax cable.
Allan
Sid sold his interest in Air Com several years ago.
Allan Crites WA9ZZU
--- On Tue, 9/16/08, Joe Montierth [EMAIL PROTECTED] wrote:
From: Joe Montierth [EMAIL PROTECTED]
Subject: Re: [Repeater-Builder] Re: air com
To: Repeater-Builder@yahoogroups.com
Date: Tuesday, September 16, 2008, 12:48 PM
Can you people get your damn discussion off this repeater builder site. I'm
interested in hearing about repeaters and directly associated problems NOT
ABOUT SEX OFFENDERS.
Allan Crites WA9ZZU
MCH [EMAIL PROTECTED] wrote:
That would be an interesting case.
Does any group of people
DCFlux
Matt Krick K3MK
Was wondering if and when you might be uploading your final report on
conversion of the SEA ESP 1000(M) ACSB equipment for use on 222-225 MHz FM ?
Allan Crites WA9ZZU
Repeater-Builder@yahoogroups.com wrote:
Hello,
This email message
Mike
Are you saying that a bunch of techs and engineers from Motoroa used to hang
out at your aunt's house? in Evanston? Strange. First I ever heard of that.
AC
George Henry [EMAIL PROTECTED] wrote:
- Original Message -
From: Mike Morris WA6ILQ [EMAIL PROTECTED]
To:
What happened to the rest of the $7500 ?
AC
Com/Rad Inc [EMAIL PROTECTED] wrote:
I share this crazy deal with y'all
Some Mort in Indonesia gave us an order for 10K worth of ICOM gear on 4
credit cards.Air mail to Surabaya or wherever. We took the card info
but never
Paul,
Perhaps you can now explain how the radiation pattern changes on a single
center fed, 1/2 wave length simple dipole when the frequency is changed both
above and below the dipole resonant frequency, and how that relates to the
statements you have made below.
73 Allan Crites WA9ZZU
to
impedance matching and the manufacturer's honesty.
Thank you.
73 Allan Crites WA9ZZU
Paul Plack [EMAIL PROTECTED] wrote:
Allan,
I question the relevance, but here goes. I just modeled an ordinary half-wave
dipole in free space in EZNEC. 20 MHz low at 450 MHz is about 4.5
Larry,
I was not going to make a response to your last but since you have provided
your source of information may I then provide mine.
It appears that your Motorola sales guy's misled you and that you have
unsubstantiated information which you never bothered to verify by reading the
-
From: allan crites
Sent: Feb 27, 2008 9:56 AM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: Motorola TLD6612A amp repair
Larry,
I was not going to make a response to your last but since you have provided
your source of information may I then provide
My cross reference indicates the M9701, a PNP Si in a TO- 66 case, is the same
as
a 2N5956. Another replacement is a 2N6318.
The TIP 42 is in a TO-200AB plastic case, not directly replaceable.
Allan Crites WA9ZZU
[EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
Its
it was manufactured during the same era , the 1960's 70's,
it doesn't even begin to be a Motrac series radio.
The only HB base station made by Motorola which used a Motrac xmtr and rcvr
was the 110 W. Compa Station.
Allan Crites WA9ZZU
[EMAIL PROTECTED] [EMAIL PROTECTED] wrote
.
No other changes were needed as the xtal in the channel element still
operates at 18 MHz. Only the deviation pot needed adjustment to get +/-5 KHz.
Cost of the conversion was only my time and effort, a new xtal and a surplus
p.s.
73 Allan Crites WA9ZZU
Mike Morris WA6ILQ [EMAIL PROTECTED
have is 44 pages and
not for the 5042-1.
73 Allan Crites WA9ZZU
Don Spivey [EMAIL PROTECTED] wrote:
Thanks for everyones help regarding this duplexer. By combining the
information in each reply, can I assume I could have a good shot at
tuning this duplexer
Allan Crites WA9ZZU
Gary Schafer [EMAIL PROTECTED] wrote:
I don't know that particular duplexer. The close spacing capability
is not
an indication that it is a band pass/band reject or a straight notch type
unit. It could be either.
The difference in the smaller mobile type or smaller
Eric,
I have two M6709 IC's I will send to you if you send your address to me.
Please consider this a donation to your cause.
73 Allan Crites WA9ZZU
Mike Morris WA6ILQ [EMAIL PROTECTED] wrote:
Moto used two or three different numbers for the Micor squelch chip,
all of which
? Again.
73 Allan Crites WA9ZZU
Ron Wright [EMAIL PROTECTED] wrote:
Allan,
Well I think most on here do not quote their sources for many got info long
time ago and from many sources.
If you want a list of some of what I got...well ok:
Reference Data for Radio Engineers, ITT
doesn't ever
bother to quote the sources for his statements. I'm begining to wonder if you
as well as he have any.
73 Allan Crites WA9ZZU
Ron Wright [EMAIL PROTECTED] wrote:
Gary,
I gave the reason for the statement...measured with HP piece of test equipment.
Was quick
.
73 Allan Crites WA9ZZU
Jesse Lloyd [EMAIL PROTECTED] wrote:
My source was Electronic Communications Systems by Wayne Tomasi
from DeVry. Copyright 1998. Its my old collage text. Also I grabbed
additional information from google searches.
Jesse
On 9/3/07, allan crites
about attenuation in coaxial transmission
lines that does not benefit the less informed readers of this group.
Allan Crites WA9ZZU
Jeff DePolo [EMAIL PROTECTED] wrote:
Jesse,
Then why do twin feeders have much less loss than coax???
Skin affect is even more of a factor
Depending on the model of Motorola peaking generator you possess determines the
type and freq. of the xtal you can use in it.
The later model accomodates 20-32pF xtals from about 4-5 MHz to about 15 MHz,
negating the need for the xtal to be 1/2 the output freq. for a 10.7 MHz out.
Any use of
and save them for projects them when it's easy to remove and
store them away.
cheers,
skipp
allan crites [EMAIL PROTECTED] wrote:
allan crites [EMAIL PROTECTED] wrote: Date: Wed, 23 May 2007 16:51:22
-0700 (PDT)
From: allan crites [EMAIL PROTECTED]
Subject: Motrac Rcvrs PL encoder / decoders
allan crites [EMAIL PROTECTED] wrote: Date: Wed, 23 May 2007 16:51:22 -0700
(PDT)
From: allan crites [EMAIL PROTECTED]
Subject: Motrac Rcvrs PL encoder / decoders
To: Repeater-Builder@yahoogroups.com
Kris and John,
There were no Motorola Motrac base stations built. Only beige colored
.
The first priority was going to be to run it in ACSSB in the 222 to 225 MHz
region with 1.6MHz split instead of 220-222 1M. NB-FM would be the gravy.
On 4/26/07, allan crites [EMAIL PROTECTED] wrote: DC,
The model no. is ESP1000/ESP1000M and the master base station oscillator
(MBSO
.
The rcvr IF is 10.235 MHz if I remember correctly. Here an outboard
quad.detector on 10.235 MHz of some sort would be needed for recovery of the
modulation, if the +- 5.0 KHz modulation deviation ever made it thru the rcvr
IF +- 2.5 KHz xtal BPF.
Allan Crites WA9ZZU
DCFluX [EMAIL PROTECTED
to read 10.275 MHz. I regret the
error.
Allan Crites WA9ZZU
allan crites [EMAIL PROTECTED] wrote:
DCFluX,
From what I saw the xmtr VCO (as is the rcvr VCO) is phase locked to the
synth. which uses the 10.235 MHz reference. The xmtr VCO operates 10.235 MHz
above the carrier freq
DC,
The model no. is ESP1000/ESP1000M and the master base station oscillator
(MBSO)
that operates at 10.275 MHz is contained in only one of the rack combination
of up to 5 xmtrs. The manual is 1 1/2 thick and is very complex. I look
forward to hearing how you expect to accomplish
Tim,
The ATT spec for line loss from the sending end to the central office is 9
+- 1 dB and from the central office to the receiving end is 9 +- 1 dB. So your
total loss will be 18 +- 2 dB.
I need to find my tone remote manual to get the answers to your other
questions.
WA9ZZU
Steve
available today.
Allan Crites WA9ZZU
Gary Schafer [EMAIL PROTECTED] wrote:
Hi Allan,
Coax line impedance is determined mainly by the size of the center conductor
and its spacing to the outer shield of the cable and somewhat by the dielectric
in the cable
How about shipping only the dipoles and harness, you keep the pipe the dipoles
are mtd. on?
Allan WA9ZZU
chuckmf1135 [EMAIL PROTECTED] wrote:
--- In Repeater-Builder@yahoogroups.com, allan crites [EMAIL
PROTECTED]
wrote:
Sounds like what im looking for but the shipping would
Have Scala 890-960 Mhz paging antenna will trade. Appears to be model
OGB3-900 and is 60 long and I measured VSWR on my N/A of 1.5:1 over 890-990MHz
range. Advise further.
chuckmf1135 [EMAIL PROTECTED] wrote:
Have Andrew dB224 4 bay vertical in good condition, ready for use in
. Mearly connecting
four folded dipoles in parallel will not get you to 50 Ohms. The Xc reactance
needs to be considered also. Dream on.
Allan Crites WA9ZZU
chuckmf1135 [EMAIL PROTECTED] wrote:
Thanks i found out its a Andrew dB224 - 155-165mhz, i was hoping it
would be in the 145mhz
Eric,
Just what kind of receiver did you use in your ballpark estimate example?
Allan Crites WA9ZZU
Eric Lemmon [EMAIL PROTECTED] wrote:
Sam,
Just to give you a ballpark estimate, I used CommShop for Windows to
generate a solution for a 50 watt transmitter that is separated
I sure would like to hear what you all mean by constant impedance .
Allan Crites, WA9ZZU
Gary Schafer [EMAIL PROTECTED] wrote:
-Original Message-
From: Repeater-Builder@yahoogroups.com [mailto:Repeater-
[EMAIL PROTECTED] On Behalf Of Ken Arck
Sent: Thursday, March 22
Larry,
Are you looking for tube types or SS, with or without a PS?
I have 3 Mot. 375W. vhf high band PA's w/o PS. model no. TLD6612A.
Allan Crites WA9ZZU
Larry WIlliams [EMAIL PROTECTED] wrote:
Hi, I am in need of six 250 watt vhf high band power amps. If you have
or know
Since when is the Xc of the Collector-Base capacitance of an output transistor
or the Drain-Gate capacitance of a FET considered an open circuit at RF?
Allan Crites WA9ZZU
Jeff DePolo [EMAIL PROTECTED] wrote:
Bypassing the relay shouldn't have an effect on the TX output
Z when
Now that dBi Vs dBd seems to have been settled, perhaps there is someone who
cares to explain if antenna manufacturers express their antenna gain with
voltage dB's or in power dB's. There is a difference.
Allan Crites
WA9ZZU
Gary Schafer [EMAIL PROTECTED] wrote
and 270 degree locations around
the tank with two antennas mounted at 0 and 180 degrees.
Good Luck!
73, Allan Crites, WA9ZZU
Jim B. [EMAIL PROTECTED] wrote:
Dave VanHorn wrote:
I would suggest 1/2 wave away from the surrounding metal as a
minimum, but try and get as far away
Skipp,
I sure would appreciate your sending to me the PDF file scan of the Sinclair
paper.
Thanks,
73, Allan Crites wa9zzu
skipp025 [EMAIL PROTECTED] wrote:
Depends a lot on the size of the water tank, then the type of
antenna and its mounted distance from the tank. Not an easy
85 matches
Mail list logo
