Richard D. Reese [EMAIL PROTECTED] wrote:
Mike;
That's me. How do we know one another? I see you were born in 1967.
I did work car 7 in the early 70's. You would have been a bit young
Back then. What did I do to have you remember me after all of these years?
I hope it was something
awesome let me know how much it cost to copy and mail and I'll remit it to
you KB1chu
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Does anyone know the formula for calculating the distance between two DB-252 corner reflectors that are connected by a phasing harness? I'm sure this is frequency dependent and I want to getthe spacing correct.Thanks T.J. KC8LTS
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I've already helped this guy out... (and a few
others who emailed me).
cheers,
skipp
[EMAIL PROTECTED] wrote:
awesome let me know how much it cost to copy
and mail and I'll remit it to
you KB1chu
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At 2/7/2006 09:18 AM, you wrote:
Does anyone know the formula for calculating the distance between two
DB-252 corner reflectors that are connected by a phasing harness? I'm
sure this is frequency dependent and I want to get the spacing correct.
I assume you're talking vertical separated
Hello,
I am presently hooking ua remote base radio to my vxr5000. The 5000 COS
needs a contact closure to make function. I am using a ICOM 207 via 6
pin mini din for signaling. I have used a 2N transistor set up as a
open collector output circuit to trigger the COS on the 5000 repeater.
I have a board that is 90% of that. It was meant to be used with an
off board pot and does not have the .05 uF / 10 ohm network.
This was for another project that never took off. I have hundreds of
them that you can have just for the shipping cost. Let's say $1 for 5
or less. E-mail me
I also have a big difference between the bird and the service
monitor. Since the service monitor goes in for periodic calibration,
I always assumed it was correct over the bird readings.
I would consider this a big alarm bell..
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Don't tune pass or pass/reject cavities with a tracking generator and
spectrum analyzer which shows only insertion loss. Don't. Don't.
Don't. You need to look at return loss. Search the archives - this
issue has come up and beaten down on more than one occasion...
So you can't tune them
If I take all the opinions I've seen in the last month as fact, then
the pass adjustments on duplexers can't be tuned.
I'll take most of what you said as being sarcastic, but your point is taken.
If tuned with a quality network analyzer, or with a return loss bridge and
high return loss
I'd be interested in some too. Paul kb9wlc
--- ldgelectronics [EMAIL PROTECTED]
wrote:
I have a board that is 90% of that. It was meant to
be used with an
off board pot and does not have the .05 uF / 10 ohm
network.
This was for another project that never took off. I
have hundreds of
ldgelectronics wrote:
I have a board that is 90% of that. It was meant to be used with an
off board pot and does not have the .05 uF / 10 ohm network.
This was for another project that never took off. I have hundreds of
them that you can have just for the shipping cost. Let's say $1 for 5
I see lots of the same kind of mentality around here. Many of the local hams
that figure if a little gain is good, then a whole lot more must be a lot
better. 40-watt PA decks driving 100-watt PA decks, receiver preamplifiers
running wide open at high-RF sites, single-shield coax for jumpers,
I assume one wavelength from center to center correct?T.J. KC8LTSBob Dengler [EMAIL PROTECTED] wrote: At 2/7/2006 09:18 AM, you wrote:Does anyone know the formula for calculating the distance between two DB-252 corner reflectors that are connected by a phasing harness? I'm sure this is
I assume one wavelength from center to center correct?T.J. KC8LTSBob Dengler [EMAIL PROTECTED] wrote: At 2/7/2006 09:18 AM, you wrote:Does anyone know the formula for calculating the distance between two DB-252 corner reflectors that are connected by a phasing harness? I'm sure this is
Hello,
Anyone need any of these UHF GE radios? I still have several holding my
concrete floor down in my shop, one good thing, I will never blow away!
They have all been tested and have one TX and one RX channel element tuned
up on 460/465.something.
If interested reply directly to [EMAIL
Paul Finch wrote:
Kevin,
OK, I understand now. I have (in a past life) worked as a RF engineer but
don't have any of the equipment available to me. This is a Johnson Fleetcom
II 530 radio I am trying to modify. Everything so far has moved to 224 MHz
OK except these micro strips, it like it
Kevin,
No, they are specified with a cutoff of 175 MHz, durn it! I don't know how
much fudge factor they give in them but I would think I could manage
something out of them. I am sort of disappointed that I can't get anything
past the transistors though. I do think it's the micro strips fault
ERIC, VERY WELL PUT I APPLAUD ALL OF YOUR COMMENTS!!! My repeaters
have been on the air for a few years and they still are not
complete. I started as close to perfect as I could get them and
continue to try and make improvments with new antennas, added
features and what ever I can think of to
-Original Message-
From:
Repeater-Builder@yahoogroups.com [mailto:Repeater-Builder@yahoogroups.com]
On Behalf Of lcradio2002
Sent: Monday, February 06, 2006 1:49
PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] VHF
duplexer wanted
Anybody have a
From reading your post, what I'm getting is that the Icom is keying
the VXR5000 okay. When the VXR5000 receives the responding radio
that it isn'y keying the ICOM. If that is right, you also need a
similar circuit from the COS circuit in the VXR5000 to key the
ICOM. .NEVER CONNECT ONE
Jeff, how's the driver PA harness built and how are the 2 PAs
outputs combined? Do you have any information or specs on the RF and
matching harnesses and how they are built?
--- In Repeater-Builder@yahoogroups.com, Jeff DePolo WN3A
[EMAIL PROTECTED] wrote:
I am looking at acquiring a GE
The power dividers/combiners are just Wilkinsons. They are built into
little square chassis with perforations for cooling, with a monolithic 100
ohm resistor mounted to the chassis and the usual quarter-wave 75 ohm
matching sections. Nothing fancy.
I interfaced a VXR-5000 to several different controllers over
the years and got painfully familiar with the available inputs and
outputs.
You mentioned that you connected the collector of your
interface circuitto the COS pin on the VXR-5000. What connector and
pinon the VXR are you
Can someone please
explain what the difference is between a BandPass/BandReject duplexer and a
BandPass/Notch duplexer?
Is one more
desirable that the other and if so, why?
Also - I just put a
new PA online today on my 444.550 machine. The duplexer I have is rated at
100W, and the PA
Can someone please explain what the difference is between a
BandPass/BandReject duplexer and a BandPass/Notch duplexer?
In our little two-way radio world, the answer is that there is no
difference.
Technically speaking, a notch is very narrow, targeting only a specific
frequency. A
On Wed, 8 Feb 2006, N9WYS wrote:
running about 50W with the old PA. (BTW - There is an isolator between
the duplexer and the PA.) Will this cause me any grief either now or
Here's a thought -- if you put a isolator between the PA and the duplexer,
and a isolator between the duplexer and
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