开云体育

The helical resonator/stub lowband duplexers work ... but that's about all
you can say about them. It is real easy to end up with almost zero
transmitter power out to the antenna and a nice, toasty warm duplexer,
particularly with 250-400 watt Micor repeaters. They also provide ZERO
isolation from interference and intermod-producing signals coming down the
antenna line.

30-50 MHz cavities are not real common but can be found - 2 or 3 of those
will make a very nice duplexer. TX-RX and Wacom also produce cavity
duplexers. Or you can shop the spring garage sales for used hot water
heaters and build your own!

......John WB4VVA

Hi Ed:

On Thu, 18 Mar 1999 09:13:37 -0500, Ed Bathgate, RMA Repair Dept x8785 wrote:

Ok, can I build a similar device?

Probably, as the inside is simple, but look around for
a used one. As more and more government/business's get
away from the low band, they will become easier to find.

How can they get a small can to do 6 meters?

Ah...the wonders of helical resonators! You have to
remember that these "cans" can only be set up for
NOTCHING a frequency, and not PASSING a frequency.

Look at any good commercial 2 meter or UHF radio. The
small square blocks near the antenna are helical
resonators.

What is inside the 'paint cans'?

A coil of wire (the helix) and a plunger on a threaded
rod which tunes the helix to the frequency of choice.

I already know of the heliax stub duplexer design...
I know a fellow who was selling his, it does not work
well according to him. I know where I can get paint
cans cheap...

Most of the heliax stubs are 1/4 wave length long, and
do basically the same as a helical resonator. The
shorted and opened stubs are there for usually the "C"
part of the "LC" circuit (creating the "50 ohm" in/out).


Tedd Doda CET

packet va3sed@va3sed
e-mail lazer@...

I was researching 6 meter band antennas & duplexers, and came across
Decibel Products. They have a design of a duplexer that can do a
.5mhz split and its only 30" high. It uses what appears to be 6
tunable paint cans, (???!) and several sets of tuned length coax
lines and several coax stubs.

I have rebuilt and re tuned a hybrid ring duplexer for 2m, and old
sinclair, that looked like 4 scuba tanks and a whole lot of coax.

I was intrigued by their design, until I called them and got
the $2300 price! Yeowza!!

Ok, can I build a similar device?
How can they get a small can to do 6 meters?
What is inside the 'paint cans'?

I already know of the heliax stub duplexer design...
I know a fellow who was selling his, it does not work
well according to him. I know where I can get paint
cans cheap...

73

Ed N3SDO

Ed Bathgate RMA Dept (724) 772-8785
pager (412) 649-6773

First I've seen of the LDG Voter. I use Spectratac and GE. Will this voter
work with Status Tone Receivers ??

Adam N2LKV
Afeuer@...

Ken Califf wrote:

From: Ken Califf <crkside@...>

I have an LDG voter I am selling. It is already built in nice rack mount
enclosure with feed thrus on all logic lines in and out of the enclosure. I
dont have the necessary sites for using it. I am asking $200 for it
complete with manuals.

The Lacko's wrote:

From: "The Lacko's" <Lacko@...>

Looking for source on a min of 3 channel voter and rx'r.

Thanks for the help,

Scott

------------------------------------------------------------------------
Come check out our brand new web site!

Onelist: Making the Internet intimate
------------------------------------------------------------------------
This list is sponsored by the owners and users of "RBTIP"

------------------------------------------------------------------------
Have you visited our new web site?

Onelist: Helping to create Internet communities
------------------------------------------------------------------------
This list is sponsored by the owners and users of "RBTIP"

HI
You got a phone number on the LDG Voter
Harold
KD4JFN
kd4jfn@...

I have an LDG voter I am selling. It is already built in nice rack mount
enclosure with feed thrus on all logic lines in and out of the enclosure. I
dont have the necessary sites for using it. I am asking $200 for it
complete with manuals.

The Lacko's wrote:

The Lacko's wrote:

From: "The Lacko's" <Lacko@...>

Looking for source on a min of 3 channel voter and rx'r.

Thanks for the help,

Scott

Scott,

Go to
or

I have and use an LDG Electronics voter and it works nicely.

Kevin

Looking for source on a min of 3 channel voter and rx'r.

Thanks for the help,

Scott

I swear, after all the time and grief various people put into repeaters,
between the kerchunkers, the noise bursts, the lids, the fights for space,
the audio troubles, the attempts to run things on a shoestring instead of real
money, the neat gizmos to hang off the repeater and controller, voters, links,
programming controllers, phone patches, having to move for various reasons,
co-channel machines and users, (both legit and of the "I'm gonna put a
repeater on this pair, go ahead and try and stop me" kind who know better, but
don't care to be a good neighbor), the space they take up in your
basement/garage/whatever, ....

I figured out today why we do this thing called repeaters.

It's so we can always have something to play with.

Now, granted, right now I'm physically tired out after caffeine -induced
insomnia, so it sounds like sour grapes. But tomorrow, it'll be :

"The reason we do this thing called repeaters is so that we can always have
something to play with!! Yeah!!! Life is great!!!!"

Chuk Gleason
KB4MDZ

Try this URL:

LDG has a very spiffy voter which can be stacked to get more ports if
necessary.

Good luck!

73, de Gary, W7NTF

On Wed, 17 Mar 1999 10:51:34 -0500, Ray Vaughan wrote:

If you want to compare your model number to the ones for Exec II base
stations (some codes are in common) go here:

Does this mean that the "RX" stands for the Exec II? I searched
and searched for info on this prefix, but came up empty.

I checked your web page (actually it was the first thing
I did, hi) when I got the radios, as I thought you had
a list of all the different prefixes and their counterpart
name.

Thanks for the info!


Tedd Doda CET

packet va3sed@va3sed
e-mail lazer@...

On Wed, 17 Mar 1999 09:16:07 -0700, John Lloyd wrote:

Sounds correct!

Ok, thanks John. It bothered me as all the pictures I've
seen of the Exec II's don't match mine. Also, are these
things rock bound, or are they PLL'd? I can't see any
place to put either rocks, or crystal elements? There
seems to be a RX and TX adjustment near something that looks
like a VCO.


Tedd Doda CET

packet va3sed@va3sed
e-mail lazer@...

Ted
Sounds correct!

John Lloyd


Tedd Doda wrote:

At 09:06 AM 3/17/99 -0500, you wrote:

From: "Tedd Doda" <lazer@...>

Hi guys:

Is there a cross reference list of GE model number to
type/style of radio. I came across a bunch of:

RX64AAW33A/4530G2

The guy said they were Exec II mobiles on 6 meters?

According to a table I have on my web site, the 33 indicated 42-50 Mhz. So
it isn't speced for 6m, but it's real close. I would think the lower in
the 6m band the better.

The 6 should indicate 38-64 watts.

If you want to compare your model number to the ones for Exec II base
stations (some codes are in common) go here:





Ray, KD4BBM

Hi guys:

Is there a cross reference list of GE model number to
type/style of radio. I came across a bunch of:

RX64AAW33A/4530G2

The guy said they were Exec II mobiles on 6 meters?


Tedd Doda CET

packet va3sed@va3sed
e-mail lazer@...

I have for sale the following repeater system consisting of ;

ACC RC-850 controller with,
V 3.8 software
Vocabulary expansion option
Computer interface
Phone patch

Hooked to ;
ICOM RP-4020 UHF 50 Watt repeater
Sinclair labs mod # SD-445-4 duplexer
Mounted in a 19" rack, 17"tall
Also included is an ACC DVR. Never hooked it up due to limited space.
All manuals included

$3000 or best offer.

E-mail at K6OPJ@...

73 Mark (K6OPJ)

At 10:50 AM 3/16/99 -0500, you wrote:

From: tom oliver <tsoliver@...>

They make excelent repeaters or remote recievers the only weak part is the

power

supply you will probably have to lower the output and keep a fan on the power
supply or you could run the amp off an external supply I love them exec's

I am

running a mobile exec II right now on my two meter repeater. I wouldn't mind
picking up a couple more base stations myself.

tom n8ies

ps check out Ray Vaughn's repeater page he has tons of info on just this

subject

w7ntf@... wrote:

Thanks for the plug, but I have a more updated site now:



The new site has more pin-out information and a Q&A section.



Ray, KD4BBM

They make excelent repeaters or remote recievers the only weak part is the power
supply you will probably have to lower the output and keep a fan on the power
supply or you could run the amp off an external supply I love them exec's I am
running a mobile exec II right now on my two meter repeater. I wouldn't mind
picking up a couple more base stations myself.

tom n8ies

ps check out Ray Vaughn's repeater page he has tons of info on just this subject

w7ntf@... wrote:

Dave Karr wrote:

From: "Dave Karr" <davek@...>

A linear regulator really isn't the best idea here since power conservation
is a factor. As shown about 50% of the power would be dissipated as heat.
A switching regulator should be able to achieve >85% effieciency fairly
easily.

Of additional interest, there was something in EDN within the last month or
so related to maximizing the output of solar panels to charge batteries,
can't remember if it was presented as an article or as an application
example from Maxim or Linear Tech. One concept presented was taking the
output from a single panel and stepping it up to charge a higher battery
voltage. I'll dig it up if anyone is interested.

* REPLY SEPARATOR *

On 3/14/99, at 11:37 PM, Daniel Byrd wrote:

If you go with a 24 volt system, no need to bye the 24 to 12 reg for
100+.
You can build it for 20 to 30 dollars.
This might help you.

--Dave

------------------------------------------------------------------------> We have a new web site!

Onelist: The leading provider of free email community services
------------------------------------------------------------------------> This list is sponsored by the owners and users of "RBTIP"

------REPLY SEPARATOR------


DAVE:

Please keep me posted, I am interested in maximizing solar panel
efficiency. I am now currently employing 12 panels of 53 watts each
and connected to 10 each 200 ah batteries...I suspect I am not getting
the most of solar energies....Police use of Repeater in mountain site.

thanks

chris inos

wh6um

kp4pknet wrote:

From: kp4pknet@... (kp4pknet)

Hi.....

My name is Max and my call is KP4PK. I run a 144, 222, and 440 mhz machines
on solar and wind power. I use 6, 60 watt solar panels and a 300 watt wind
mill all at 24V. That feeds (8) 6v 220 amp golf cart batteries. I use a 24V
to 13.8V converter to power the repeaters and packet nodes. The system runs
basically with out much supervision other than going to the site every 6 to
8 weeks to check the batteries connections for corrosion and cleaning the
solar panels.

This is not a cheap system. Figure abt $425.00 for each solar panel. abt
$650.00 for the windmill, abt $90.00 per battery, add another $125.00 for
the charge controller and another $100.00 for the voltage down converter.

I bought all the hardware ( but the batteries, which i bought locally) from
Sunelco 1-800-338-6844 and Atlantic Solar Products at 1-410-686-2500. They
can provide you with catalogs and more information.

I hope this helps,

73,

Max KP4PK

Steaven D. Rogers, KU4VR wrote:

From: "Steaven D. Rogers, KU4VR" <ku4vr@...>

I have located a site for my UFH repeater. However, this site does not
have any power that is available to me. Any ideas on how to run my
machine? I have been looking at battery, but I don't think it will run
to long unless I have quite a few batteries. The entire system will
fraw no more that 5 amps. This site is not out of the way for me to go
up every few days and change out a couple of batteries. I just don't
think they will last that long.

Steaven, KU4VR

------------------------------------------------------------------------> > Come check out our brand new web site!

Onelist: Making the Internet intimate
------------------------------------------------------------------------> > This list is sponsored by the owners and users of "RBTIP"

------------------------------------------------------------------------> Come check out our brand new web site!

Onelist: Making the Internet intimate
------------------------------------------------------------------------> This list is sponsored by the owners and users of "RBTIP"

ON POWER FOR YOUR STATION:

SEND EMAIL TO: [email protected] for Rudy Garcia ....sales
person...this company has all the equipment you need.

1. I operate 5 repeaters vhf for government use: Police/fire/hospital
etc. ..located in the mountain -no opwer....using 17each 52 watts solar
panels.....24 200 ah batteries.. ...60 amps controller.....This system
has been up an running for about 4 years now but hike up the mountain
once a month for maintenace. I am located in the tropical ARea (The
Mariana Islands 8hrs. full sunlight daily.......


good luck,

chris inos
wh6um

keep me posted on your project,, if you need additional help. email me.