Do 3/4 wavelength cavities use 1/4 wave interstage coupling cables? I
recently bought some used DB-4023 bandpass duplexers and the coupling cables
are aprox. 1/2 wavelength ??
~Mike N6KYD~
- Original Message -
From: Steve Bosshard [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
can U supply a model number of the unit
Ray
- Original Message -
From: doug [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Monday, March 15, 2004 5:26 PM
Subject: [Repeater-Builder] master III manual
i had a source for one, but he sold it.
i need a VHF Master III (
I would imagine you might want to bid on 4 that I have belongs to a
radio club in northern Ohio - they paid 800 bux and they worked good
until we split the site with the solid state pa deck. There is info on
adding a pass notch out of cable to the inside somewhere on the web, I
wanted to try this
No one silver plates the inside of the can. And my assumption was that they
were aluminum. I don't think I'd use steel.
Chuck
WB2EDV
- Original Message -
From: ka0ies [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Monday, March 15, 2004 1:04 PM
Subject:
Best bet is to pick up a used can and duplicate it times the number you
need. After you've done that and poured tons of hours into your project, you
decide whether you want to document in detail and share the info with the
rest of the world.
Chuck
WB2EDV
- Original Message -
From:
People have used coffee cans, circuit board and fire extinguishers over the
years. Why not use gas bottles and air tanks, etc.
Commercially made cans like TX RX use aluminum irrigation pipe.
Chuck
WB2EDV
- Original Message -
From: Vincent Caruso [EMAIL PROTECTED]
To:
This site explains some of the basics:
http://www.xs4all.nl/~pa0nhc/repeater/duplexfilter/English/duplexfilter.htm
Here are some plans:
http://www.vacsew.com/435/dup.htm
http://www.dalek.org/srg/cavity.html
http://www.repeater-builder.com/rbtip/2mduplexer.html
Subject: Re: [Repeater-Builder] Re: 6M duplexers using C02 bottles ?
There is info on adding a pass notch out of cable to the inside
somewhere on the web, I
wanted to try this and the following year that tower was destroyed by
mom nature.
I would be interested in this site if any one knows
Found this site too:
http://www.amalgamate2000.com/radio-hobbies/radio/coaxial_resonators.htm
- Original Message -
From: David Schornak [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Monday, March 15, 2004 4:25 PM
Subject: [Repeater-Builder] duplexers
has anyone or does
is it possible to actually read 1662 volts AC on a 600 volt digital
meter by putting ground lead of meter on chassis , and the red
one on pin 1 then pin 9 in the ET-60 TX strip , this doesnt seem
possible to me bit i double checked my house current and it read
117
is it possible to actually read 1662 volts AC on a 600 volt digital
meter by putting ground lead of meter on chassis , and the red
one on pin 1 then pin 9 in the ET-60 TX strip , this doesnt seem
possible to me bit i double checked my house current and it
Use what you got to make what you need!
That is the fun of it all.
I liked using irrigation pipe.
-Original Message-
From: dave_g7uzn [mailto:[EMAIL PROTECTED]
Sent: Monday, March 15, 2004 6:48 AM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] 6M duplexers using C02
I suspect there was about 600 VAC 60 Hz., and a healthy dose of RF on top
of the 60 Hz.
Ssb
Yahoo! Groups Links
* To visit your group on the web, go to:
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* To unsubscribe from this group, send an email to:
[EMAIL PROTECTED]
*
I suspect when you add the coupling loop length that the interstage cables
will be on the order of 3/4 wave length, or around 10 or so.
I ran into the 3/4 wavelength business taking some 10 Sinclair VHF
cavities, and building a 5 channel UHF combiner with cavities and dual
junction isolators.
Steve I am beginning to believe that with as much info as I have found.
I have it on good advice from Lloyd Alcorn at Wacom Products (RIP Wacom)
that Black Magic is involved.
Steve
In a nutshell, the cavities are either 1/4 or 3/4 wavelength with
coupling loops oriented for a particular
Goto http://www.hallelectronics.com/getech/sx1.htm to get a list of
publication numbers that you need...
Then goto www.radtek.ws to download the manuals.
- Original Message -
From: doug [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Monday, March 15, 2004 6:26 PM
ya i got it , it was dc and its throwing 742 voilts but i think i
found the reason forno out put , dead but glowing 8156 and 8106
, the thing im worried about is that 8072 being bad , in finding that
the cabinate was dropped 8 inches on a concrete deck , im pretty mad
Isn't it supposed to be on DC???
- Original Message -
From: Ralph Mowery [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Monday, March 15, 2004 9:53 PM
Subject: Re: [Repeater-Builder] Voltage in an Mpro Ge deskmate
is it possible to actually read 1662 volts AC on a
You will be rewarded when its up and on the air! I have over 1,000 man/hours
in my machines and they look and sound like it...73
- Original Message -
From: Russell Filling [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Monday, March 15, 2004 10:09 PM
Subject: Re:
Hi
The TKR750/850 might be the best repeater out there of the money. I think.
Make sure you get one with the updated TX. There are much better and should not
fail even at 50 watts of ham use.
Welcome to w9win.org!
73 Mike
Yahoo! Groups Links
To visit your group on the web,
I've known Vince for a number of years ... I hope the 'business'
is good for you ...
Neil
Ted Bleiman K9MDM - MDM Radio wrote:
vince has been giving us the 'business' for
years!!! and we appreciate it.
mdm
btb
new MDM website is ONLINE. adding stuph all the
time now.
I am putting together a UHF repeater on 443.775 (+) and acquired a 40 watt (Intermediate) PA deck from an unknown source and started to visually check it out versus the schematic diagram.
Now, the GE manual (LBI30201) identifies my pa deck as 19D321347G5 Rev N. This matches the yellow label
There is a tube store in Tempe Arizona that has fair prices on new old
stock tubes, I think it is called radio restoration or something close -
before you chase good money for new why not buy another mobile radio at
a swap-n-shop? Or dig into a 2way shop's castaway pile to see what you
can
At 07:07 PM 3/15/04 -0500, you wrote:
Come on now guys.show me a bloke who tuned his FIRST set of cavities
with a QRP tx, a long bit of coax, a tunable rx with a vhf converter, and
a
second hand scope and I will show you some who could end up as a real
engineer, understanding what
Antique Electronic Supply http://www.tubesandmore.com
What part of which radio are you looking for?
Neil
Virden Clark Beckman wrote:
There is a tube store in Tempe Arizona that has fair prices on
new old stock tubes, I think it is called radio restoration or
something close
Check out WB5WPA's page @
http://www.dallas.net/~jvpoll/dup6m/dup6m.html
--- In Repeater-Builder@yahoogroups.com, NØATH [EMAIL PROTECTED]
wrote:
Subject: Re: [Repeater-Builder] Re: 6M duplexers using C02 bottles ?
There is info on adding a pass notch out of cable to the inside
Does any of you guys still has the power chart for the Osker Block SWR 200 swr meter? My friend told me that I would need it to be able to use its power meter. It seems that the Osker company does not have a web site anymore.Thanks, God bless all. Do you Yahoo!?
Yahoo! Mail - More reliable,
Title: Message
IIRC,you add a cap and remove a cap in the 40 watt PA to change
from 406-420 to 450-470. It makes a slight improvement in power output in
the 440-450 range if you make the changes. You won't let the smoke out
even if you don't make the mods. I have the GE mod notes covering
The best one that I have found over the years comes from the kit that
Motorola (yuck) sent with Micror base stations. Anybody out there have some
to spare? Please email.
From: John Everson [EMAIL PROTECTED]
Reply-To: Repeater-Builder@yahoogroups.com
To: Repeater-Builder@yahoogroups.com
What band is this deskmate on?
CW Wolfe Communications used to sell used tx and rx modules for $10.00 each.
I have some VHF Mobiles handy.
tom n8ies
- Original Message -
From: Neil McKie [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Tuesday, March 16, 2004 7:01 AM
Yep,
I built a set, and they work well.. getting the first one right is the
trick. The other 7 came easy. I would suggest you look to my web
site.. but it is down for maintenance at the moment.
3.5 hardline would be an interesting project... haven't tried that one yet.
73's
Mike
At 06:38
john
have you tried new london technology the
repository for all things GE-ish.
434 525 0068
or they are on the web...somewhere.
mdm ted
--- John Everson [EMAIL PROTECTED] wrote:
Hello to the group.
Does anyone know of a good source for the
correct size (just what is
that size?) tuning
thank you. and we ain't thru yet.
mdm ted
--- Vincent Caruso [EMAIL PROTECTED] wrote:
Nice Site!!!
Yahoo! Groups Links
http://groups.yahoo.com/group/Repeater-Builder/
[EMAIL PROTECTED]
=
Ted Bleiman K9MDM -just tired
MDM Radio Ltd
1629-B N. 31 st Ave
I know where there was about 40 feet of some 6 and 3/8 heliax
a while back... but shipping it would be a major PITA.
Mike
At 09:01 AM 3/16/04 -0500, you wrote:
Yep,
I built a set, and they work well.. getting the first one right is the
trick. The other 7 came easy. I would suggest you look
Motorola Maxtrac D37MWA5GB6 with mike and power
cable. $110.00 + shipping
708-681-0300 days .
m/c and visa ok
=
Ted Bleiman K9MDM -just tired
MDM Radio Ltd
1629-B N. 31 st Ave
Melrose Park, IL 60160
708.681.0300 fax 708.681.9800
email [EMAIL PROTECTED]
web http://www.mdmradio.com
That sounds like 50 ohm plumbing! :)
-Original Message-
From: Mike Morris [mailto:[EMAIL PROTECTED]
Sent: Tuesday, March 16, 2004 3:30 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: 6M duplexers using C02 bottles ?
I know where there was about 40 feet of
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