Guys,
I'm considering the relative value of various coax protection schemes for a
planned UHF ham repeater. I know PolyPhaser is the industry standard, but I
also know they don't last forever, and can cause problems with spurious
emissions in some failure modes.
A simple shorted quarter-wave
On May 12, 2010, at 12:22 AM, Paul Plack wrote:
Guys,
I'm considering the relative value of various coax protection schemes for a
planned UHF ham repeater. I know PolyPhaser is the industry standard, but I
also know they don't last forever, and can cause problems with spurious
Yeah, I could go for 1 or 2. I've got a bad habit of collecting weird
220 equipment, I've got both SEA and Linear Modulation Repeaters.
On Tue, May 11, 2010 at 7:08 PM, NORM KNAPP nkn...@twowayradio.net wrote:
I have (had) 4 if them.
I was going to give them to Bill in Atlanta. I have not yet.
Nate,
I appreciate the thoughts. I've been blessed to be around some really nice
broadcast sites, and one of the telco microwave sites, during my career, and
I'm not sure which is worse...having a site attacked by the new engineers who
only know card-swapping, having it attacked by bean
Hi guys .I know this is off subject but would anyone know where we can
information on a electronka pee-15v TV transmitter
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
What about the Brisbane vhf group ?
http://www.qdg.org.au/
or CBRS ( city of Brisbane radio society )
To: Repeater-Builder@yahoogroups.com
From: kerin...@pacific.net.au
Date: Wed, 12 May 2010 19:41:59 +1000
Subject: [Repeater-Builder] Old TV transmitters
Ill give them a go
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
---Original Message---
From: Barry
Date: 05/12/10 19:54:34
To: repeater-builder@yahoogroups.com
Subject:
My email was rejected
Thank You,
Ian Wells,
Kerinvale Comaudio,
3A Murchison Street,Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
---Original Message---
From: kerincom
Date: 05/12/10 20:00:16
To: mail=repeater-buil...@yahoogroups.com
At 5/11/2010 21:07, you wrote:
For those who wonder how the TFD61x2 filter can impair the transmit signal
at 2m, look at the attached plots. The TFD6102 filter is electrically
identical to the TFD6112, and the TFD6101 filter is electrically identical
to the TFD6111. Although there will be some
I don't know if there is any interest, but I have several operational Uniden
FMU 250K UHF mobiles that are free to anyone who would like them. USPS is about
$11 for the med flat rate box. If you let me know before 5 PM Thursday, I can
bring a few to Dayton.
Reply direct, please
Thanks,
Bill
I found references on the web to a repeater controller software for linux but
can not find a working download for it. Called LINREPEAT ???
Any links to working downloads? or info on on other repeater control software?
Thanks,
Bryan
KJ4QZJ
John -
That part is actually the low-pass filter used on the output of the power
amplifier to prevent harmonics from leaving the unit.
It is a pretty good filter, with about 1 dB insertion loss up to 180 MHz, and 3
dB at 200 MHz.
After that it falls off pretty fast.
Here are my measurements
I am looking for a Dow-Key antenna relay with a 12 VDC coil. If anyone has
one, please contact me off net!
Fred W5VAY
Thanks to everyone who provided their expertise and input. I like to think we
all learned something as much as I have. (Even if just a little)
My deepest appreciation to all!
John Hymes
La Rue Communications
10 S. Aurora Street
Stockton, CA 95202
http://tinyurl.com/2dtngmn
- Original
Thanks John et al!
Its good to know that you all can fill in where Google fails! When you want
answers, you go to the right source - doubt theres any finer group around than
this one. :-)
Cheers and thanks again!
John Hymes
La Rue Communications
10 S. Aurora Street
Stockton, CA 95202
Is Microwave still in demand? I heard that they are an exclusive frequency
mostly used by PGE in CA. Is the interest level for microwave bands nil? I
have some microwave parts here and consider them junk as I have not heard much
about microwave communications lately.
John Hymes
La Rue
Depends on the band.
2.0-2.2GHz is in the process of getting bought out by Sprint, so most of
that equipment is worthless unless it will tune up to 2.4 GHz for use on
ham.
7, 12, 24, and 36 GHz are commonly used for commercial applications
2.4, 3.4, 5.8 10 and 24 GHz are useful for amateur
Thank you Sir!
So from what I understand Sprint is buying out the Microwave frequencies, and
Nextel is re-structuring / re-banding the 800 MHz frequencies? Is there an 800
MHz ham band?
John Hymes
La Rue Communications
10 S. Aurora Street
Stockton, CA 95202
http://tinyurl.com/2dtngmn
-
No 800 band for hams, closest is 902-928 which is the 33cm ham band, it is
also used by ISM type devices such as cordless phones, baby monitors, 802.11
internet and wireless video senders.
Sprint is just buying the 2.0 - 2.2 range, alot of the older stuff (licensed
since the 60s) was on here. Its
With that being said, how popular is the rest of the microwave band? Is it one
of the more dangerous bands if used improperly?
John Hymes
La Rue Communications
10 S. Aurora Street
Stockton, CA 95202
http://tinyurl.com/2dtngmn
- Original Message -
From: DCFluX
To:
Generally microwave is used for point to point communications such as
intercity links for telephone and studio to transmitter links for television
and radio stations.
The power generated by the transmitter is fairly low in the 10-100mW range
but the antenna gain of a dish is extremely high
So in a nutshell, microwave is a band of precision and pinpoint accuracy?
Common sense that people shouldnt use wood for anything outside that demands
long-term stability. Not only do the elements cause warping, but also prone to
termites, etc. Wow!
Thanks for all the good input!
John Hymes
--- In Repeater-Builder@yahoogroups.com, walscobry walsco...@... wrote:
I found references on the web to a repeater controller software for linux but
can not find a working download for it. Called LINREPEAT ???
Any links to working downloads? or info on on other repeater control software?
A properly designed microwave path is designed around a reliability
specification, such as 99.%, which translates to about 30 seconds of outage
per year. Frequency, weather, terrain, and equipment parameters are all taken
into account. I've designed many microwave links that meet or exceed
walscobry wrote:
I found references on the web to a repeater controller software for linux but
can not find a working download for it. Called LINREPEAT ???
Any links to working downloads? or info on on other repeater control software?
Thanks,
Bryan
KJ4QZJ
Bryan,
WRT other packages,
I'm pretty sure I have one here, but you will probably get many many
replies from others to sell you one. Ciao, Tony, K3WX
On May 12, 2010, at 10:45 AM, Fred Seamans wrote:
I am looking for a Dow-Key antenna relay with a 12 VDC coil. If
anyone has one, please contact me off net!
Fred
Microwave is having a resurgence in popularity. with the demand for wireless
data increasing and cellular networks becoming all digital, Microwave is being
used where it will be cost-prohibitive to install fiber. Companies like Fiber
Tower are providing microwave backhaul for some cellular
Thanks Bill!
I was initially curious because I have a few Microwave Test equipment pieces
here in the shop that I have no idea what to do with. Specifically a 6GHz
Pre-Amp and a Vintage Motorola Microwave Modulation Tester. (Not sure what
freqs the tester handles. Need to look again).
John
Microwave is NOT 'a band'.
It usually refers to frequencies used for point-to-point RF links.
220 MHz was considered 'microwave' way back when.
As someone else mentioned, there are a NUMBER of microwave bands.
My agency uses 2, 6, 10, 11, and 23 GHz depending on path length, required
bandwidth,
John,
Do you have any time to repair Radios? When I worked for a Motorola Shop. sure
didn't have time to play.
Wesley AB8KD
- Original Message -
From: La Rue Communications
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, May 12, 2010 3:00 PM
Subject: Re:
Wesley -
I am the Web Sales Guru. Knox is teaching me the two way stuff. I am gradually
being trained to do the two way stuff (I know how to program and do basic bench
checks). Since he does all the servicing and repairs himself. I only do a
smidgen of the radio repairs, but I am on hand for
Ok John.
Just Curious. Not trying to be a Smart a--.
Will you be at the Dayton Convention?
- Original Message -
From: La Rue Communications
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, May 12, 2010 3:35 PM
Subject: Re: [Repeater-Builder] Just curious... Microwave
Norm,
I have completed my evaluation of the new Andrew Harness for use with 34
dipoles on 150-162 MHz and have completed my design of a matching line section
and stub to enable use in the 144-148 MHz band. The final Z measurements and
VSWR for the 144-148 range are included for your
(caution: off topic reply follows)
On May 12, 2010, at 12:11 PM, Walter H walter.howard...@gmail.com
wrote:
Your microwave oven operates at 2.45 GHz [the resonant frequency of
water molecules].
WalterH
Common myth. Resonant frequency of water is actually much higher, but
that's not
No offense taken or hard feelings! Knox will not be there this year,
unfortunately. He has been at the last 3 or so, but this year he just has too
much going on. If you're ever in our neck of the woods, feel free to drop by!
John Hymes
La Rue Communications
10 S. Aurora Street
Stockton, CA
I'm looking for a 6 cavity celwave duplexer for sale. Or a alternate that is
just as good if not better than celwave. It needs to be able to tune
460-470mhz. Also looking for a nice motorola m100/m120/ m110/ gm300/ maxtrac/
radio. Email back to agrim...@hotmail.com
36 matches
Mail list logo
