[Repeater-Builder] Re: DB-228 Mounting

Thu, 12 May 2005 18:17:53 -0700

I have a DB228E that I want to mount on a 300ft tower. 
The antenna is resonant at the VHF freq that we have allocated for a 2 meter repeater.
 
My question is...How far from the tower face should the dipoles be?  I dont have the 228 mounting bracket and will have to fabricate them at a machine shop IF the standard bracket for a 224 is not the standard bracket.
 
Any one know the answer?
 
Thanks
 
Lloyd KD4HTW

Repeater-Builder@yahoogroups.com wrote:
There are 25 messages in this issue.

Topics in this digest:

1. Vari Notch
From: Fraser Stuart <[EMAIL PROTECTED]>
2. Re: Di-Electric Grease
From: "n8sac" <[EMAIL PROTECTED]>
3. Re: Re: Di-Electric Grease
From: "Brett" <[EMAIL PROTECTED]>
4. Need Micor 68P81014E15 manual
From: "vesterscott" <[EMAIL PROTECTED]>
5. Re: SEA ESP1000
From: "skipp025" <[EMAIL PROTECTED]>
6. Looking for Doug B from the 902 group
From: "skipp025" <[EMAIL PROTECTED]>
7. Re: Need Micor 68P81014E15 manual
From: "Scott Zimmerman" <[EMAIL PROTECTED]>
8. Dumb idea
From: "rtoplus" <[EMAIL PROTECTED]>
9. COS output doesn't track CTCSS (was Re: Re: I need to take 5 volts to 8 volts, and one have a schematic)
From: Bob Dengler <[EMAIL PROTECTED]>
10. Failing V7A display (was Re: Re: I need to take 5 volts to 8 volts, and one have a schematic)
From: Bob Dengler <[EMAIL PROTECTED]>
11. Re: Failing V7A display (was Re: Re: I need to take 5 volts to 8 volts, and one have a schematic)
From: Dave VanHorn <[EMAIL PROTECTED]>
12. RB-1 and RLS/RBS Analog Linking Board pdf files available
From: "skipp025" <[EMAIL PROTECTED]>
13. Re: Re: Caution on Bomar Crystals
From: Bob Dengler <[EMAIL PROTECTED]>
14. Re: Failing V7A display
From: Ken Arck <[EMAIL PROTECTED]>
15. Repeater Desence
From: DCFluX <[EMAIL PROTECTED]>
16. Re: Looking for Doug B from the 902 group
From: Doug Bade <[EMAIL PROTECTED]>
17. Speaking of Dayton...
From: "Bob" <[EMAIL PROTECTED]>
18. Re: Repeater Desence
From: Kevin Custer <[EMAIL PROTECTED]>
19. RE: Speaking of Dayton...
From: "C Wayne Schuler" <[EMAIL PROTECTED]>
20. audio board
From: "dew29649" <[EMAIL PROTECTED]>
21. Re: Repeater Desence
From: DCFluX <[EMAIL PROTECTED]>
22. Re: Caution on Bomar Crystals
From: Kevin Custer <[EMAIL PROTECTED]>
23. Re: Need Micor 68P81014E15 manual
From: "vesterscott" <[EMAIL PROTECTED]>
24. Re: Repeater Desence
From: Kevin Custer <[EMAIL PROTECTED]>
25. worth a visit before it goes away...
From: "skipp025" <[EMAIL PROTECTED]>


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Message: 1
Date: Thu, 12 May 2005 12:48:48 +0100 (BST)
From: Fraser Stuart <[EMAIL PROTECTED]>
Subject: Vari Notch

Hi I am after information on constructing a Vari Notch coupling loop for 145Mhz to be placed in a cavity they claim superior notch any ideas please,

Fraser G8FEZ



[This message contained attachments]



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Message: 2
Date: Thu, 12 May 2005 12:34:40 -0000
From: "n8sac" <[EMAIL PROTECTED]>
Subject: Re: Di-Electric Grease

--- In Repeater-Builder@yahoogroups.com, "Vaughan Henderson"
<[EMAIL PROTECTED]>wrote:
> CRC have recently introduced "Di-Electric" grease for reducing /
> stopping corrosion and water ingress in connectors. Anyone tried
it
at
> RF? Any good? Any problems.
>
> Regards
> Vaughan ZL1TGC

Vaughan
I have used Di-Electric Grease for years Made by Dow-Corning the
Product Number is # 111. Have used For everything from holding "o"
rings in place while putting gear boxes togeather , Filling Electric
boxes to keep water out have went back years later inside of box
looked
like new. I worked as Service Tech . on Auto controls for Water &
Sewer
Plants & Distrubtion systems. in a raidus of about 400 miles of
Huntington WV . USA for 30 years .I have also used in PL-256
Conections
for years in Ham Radio on all bands Some say not to use above VHF but
I
haven't had any problems. Is bether than getting water in conection
as
water will not displace this Grease. My vote is this Grease is almost
as good as SEX if I could remimber what it was like.

" Oldmax" Dale ( N8SAC )






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Message: 3
Date: Thu, 12 May 2005 21:01:34 +0800
From: "Brett" <[EMAIL PROTECTED]>
Subject: Re: Re: Di-Electric Grease

Hi all.
I to have used the dow stuff for years.
It is "4 Compound" I believe it is the same as the goop that andrews supply
with their hardline connectors.
Just about all the outdoor connectors that I have used over the past 30
years has had it in the connecting faces as well as inside the body.
I have used it in the electrical joints on my boat trailer and on my 4 wheel
motor bike(this is where faults apear in time).
Cheers from down under.
Ps I am making a portable repeater on 460mhz 10/15 watts and would like not
to use a diplexer can you advise the solution.
Maybe a tx groundplane with a solid disk and have the rx ant hanging
directly below ie 180 degree to each other.
The ch spacing is 500khz.
I would use a foil or at least a double sheilded cable for each feed.
See ya

----- Original Message -----
From: "n8sac" <[EMAIL PROTECTED]>
To:
Sent: Thursday, May 12, 2005 8:34 PM
Subject: [Repeater-Builder] Re: Di-Electric Grease


> --- In Repeater-Builder@yahoogroups.com, "Vaughan Henderson"
> <[EMAIL PROTECTED]>wrote:
>> CRC have recently introduced "Di-Electric" grease for reducing /
>> stopping corrosion and water ingress in connectors. Anyone tried
> it
> at
>> RF? Any good? Any problems.
>>
>> Regards
>> Vaughan ZL1TGC
>
> Vaughan
> I have used Di-Electric Grease for years Made by Dow-Corning the
> Product Number is # 111. Have used For everything from holding "o"
> rings in place while putting gear boxes togeather , Filling Electric
> boxes to keep water out have went back years later inside of box
> looked
> like new. I worked as Service Tech . on Auto controls for Water &
> Sewer
> Plants & Distrubtion systems. in a raidus of about 400 miles of
> Huntington WV . USA for 30 years .I have also used in PL-256
> Conections
> for years in Ham Radio on all bands Some say not to use above VHF but
> I
> haven't had any problems. Is bether than getting water in conection
> as
> water will not displace this Grease. My vote is this Grease is almost
> as good as SEX if I could remimber what it was like.
>
> " Oldmax" Dale ( N8SAC )
>
>
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>




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Message: 4
Date: Thu, 12 May 2005 15:34:31 -0000
From: "vesterscott" <[EMAIL PROTECTED]>
Subject: Need Micor 68P81014E15 manual

Anybody have a spare manual (or copy/PDF) of the 68P81014E15
supplement for the extender on the Micor T53RTA1404BA Mobile? I
already have a basic 68P81014E40 manual OTW from eBay. Thanks.

Vester N8EKA




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Message: 5
Date: Thu, 12 May 2005 15:37:56 -0000
From: "skipp025" <[EMAIL PROTECTED]>
Subject: Re: SEA ESP1000


You are on the right track. 20 watts is not
really enough power. Most of the 220 acsb
systems I saw were poorly applied and built
from plans made by people who appear to have
never been "in the field".

When you get into a new technology, there is
always strange issues to be dealt with. I had
some Intek/Securicor technical files, which
indicated to me they were not properly dealing
with those issues. You can only hide so long
behind a patch job.

Something about customer support also comes
into play.

cheers,
skipp

ps: There is still a system or two in operation
up here in Nor-Cal. How many people are on it
is another question...

> "Jim B." <[EMAIL PROTECTED]>wrote:
> I'm surprised-all of the 220 ACSB systems I've
> seen had very poor coverage compared to 460 Mhz
> FM rptrs at the same sites. They typically
> had to put 100W amps on the base tx to even get
> vaguely close. That's why most of the customers
> left.
>
> --
> Jim Barbour
> WD8CHL




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Message: 6
Date: Thu, 12 May 2005 15:57:28 -0000
From: "skipp025" <[EMAIL PROTECTED]>
Subject: Looking for Doug B from the 902 group

Sorry for the crazy post.

Doug B. from the 902 group fame... I'd like to
contact you direct, but you changed your call
a while back and I don't have a current Email
address.
Please drop me an Email direct. It's Amateur
Related.

thanks much
skipp

skipp025 at yahoo.com
[EMAIL PROTECTED]

ps: if any of you have his current email, please
feel free to fwd it along.

thanks again...
s.




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Message: 7
Date: Thu, 12 May 2005 13:10:26 -0400
From: "Scott Zimmerman" <[EMAIL PROTECTED]>
Subject: Re: Need Micor 68P81014E15 manual

Vester,

There is one in the Repeater-Builder library. The number of the one I have
is 68P1011E95. It's a Motorola photocopy. It is for the VHF extender
receiver and associated parts. I don't have it scanned into PDF though. I
won't have time to scan it to PDF before Dayton either.

If there is a volunteer, I would be willing to lend it out to be scanned and
then make it available for the group.

Scott

Scott Zimmerman
Amateur Radio Call N3XCC
612 Barnett Rd
Boswell, PA 15531

----- Original Message -----
From: "vesterscott" <[EMAIL PROTECTED]>
To:
Sent: Thursday, May 12, 2005 11:34 AM
Subject: [Repeater-Builder] Need Micor 68P81014E15 manual


> Anybody have a spare manual (or copy/PDF) of the 68P81014E15
> supplement for the extender on the Micor T53RTA1404BA Mobile? I
> already have a basic 68P81014E40 manual OTW from eBay. Thanks.
>
> Vester N8EKA
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>
> --
> No virus found in this incoming message.
> Checked by AVG Anti-Virus.
> Version: 7.0.308 / Virus Database: 266.11.8 - Release Date: 5/10/2005
>
>



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Message: 8
Date: Thu, 12 May 2005 17:20:21 -0000
From: "rtoplus" <[EMAIL PROTECTED]>
Subject: Dumb idea

Good day to all

This was posted in a couple of other yahoo groups the other day. It
might be off topic for this group, but this really concerns/angers me
as a GMRS repeater owner. There has been discussion regarding this
post within several yahoo groups as well as the Popular Wireless BBS.

Bob, GMRS WPVV845, Amateur KG4WAD, LMRS WPXC892


>>>start of post<<<

We are starting a voip repeater linking network you
can get more information at http://gmrs.hopto.org
We would like to get as many gateways as possible to
really expand gmrs repeater coverages

Thanks
fred

<<



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Message: 9
Date: Thu, 12 May 2005 10:25:28 -0700
From: Bob Dengler <[EMAIL PROTECTED]>
Subject: COS output doesn't track CTCSS (was Re: Re: I need to take 5 volts to 8 volts, and one have a schematic)

At 5/11/2005 02:58 PM, you wrote:
>True of all Kenwood amateur rigs with factory PL I believe / Dave

Hmmm, yet another thing to complain about to the vendors at Dayton, along
with the lack of split-tone capability.

Bob NO6B
><-----Be advised that without modification, the packet COS out does NOT
>track CTCSS in the V7a. In other words, it is always carrier based
>regardless of CTCSS.
>
>Ken




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Message: 10
Date: Thu, 12 May 2005 10:30:38 -0700
From: Bob Dengler <[EMAIL PROTECTED]>
Subject: Failing V7A display (was Re: Re: I need to take 5 volts to 8 volts, and one have a schematic)

At 5/11/2005 09:42 PM, you wrote:
>I'm not advocating V7A's for link service or anything but they are
>available cheap on the used market because many of them have failing
>displays which cost more to repair than the radio's worth.

Uh oh, my G707's starting to lose some display segments. I know its
display is totally different than the V7A, but does this mean I have the
choice of either converting the radio to a remote base or throwing it away?

Bob NO6B




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Message: 11
Date: Thu, 12 May 2005 12:34:52 -0500
From: Dave VanHorn <[EMAIL PROTECTED]>
Subject: Re: Failing V7A display (was Re: Re: I need to take 5 volts to 8 volts, and one have a schematic)

At 12:30 PM 5/12/2005, Bob Dengler wrote:
>At 5/11/2005 09:42 PM, you wrote:
> >I'm not advocating V7A's for link service or anything but they are
> >available cheap on the used market because many of them have failing
> >displays which cost more to repair than the radio's worth.
>
>Uh oh, my G707's starting to lose some display segments. I know its
>display is totally different than the V7A, but does this mean I have the
>choice of either converting the radio to a remote base or throwing it away?

Kenwood replaced the display on my V7a for free.
I sent it to the east coast repair center, and it came back nice and no charge.

That display is one of the biggest mistakes they ever made.
It's a great radio for the blind though, I have several friends in
that situation that like the V7a with speech chip.




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Message: 12
Date: Thu, 12 May 2005 17:34:31 -0000
From: "skipp025" <[EMAIL PROTECTED]>
Subject: RB-1 and RLS/RBS Analog Linking Board pdf files available

re: Com Spec Reverse Burst RB-1 circuit
& Cat-Auto RLS/RBS-1000 linking board circuit.

I've just Emailed copies of the Com-Spec Reverse
Burst RB-1 and the CAT RBS-1000 linking board
(the early analog version) to Mike for posting
to the RB Web Page (at his pleasure).

The RLS/RBS circuit is the earlier analog
version, which lends itself to mods quite nicely.

You can also find these items in the next
sonice page update or by a direct Email back
to me.

They are in Adobe pdf format.

cheers,
skipp

skipp025 at yahoo.com

ps: Thank you everyone for Doug's Email address.




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Message: 13
Date: Thu, 12 May 2005 10:37:28 -0700
From: Bob Dengler <[EMAIL PROTECTED]>
Subject: Re: Re: Caution on Bomar Crystals

At 5/11/2005 03:19 PM, you wrote:

>Expensive: Mototola Mitrek recrystal and tempco at ICM: $50.00/element.
>Bomar is $35.00. West is appx. $32.00.

There was a debate regarding West Crystal's alleged "temperature
compensation" a week or two ago on here. Check the archives - I forget the
conclusion, if any.

Bob NO6B




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Message: 14
Date: Thu, 12 May 2005 10:43:48 -0700
From: Ken Arck <[EMAIL PROTECTED]>
Subject: Re: Failing V7A display

At 12:34 PM 5/12/2005 -0500, you wrote:
>Kenwood replaced the display on my V7a for free.
>I sent it to the east coast repair center, and it came back nice and no
charge.

<---If you bought the radio new, yep! They'd replace it for free. For those
of us who bought one used, we got to pay for a new display assembly (which
I did).

I use my V7a as a dedicated VHF/UHF at home and I developed the line
problem. Still, $150 for the new display was ok with me, as I like the
radio anyway. And I still couldn't have replaced the entire radio with
something identical for anywhere near that!

Ken
------------------------------------------------------------------------------
President and CTO - Arcom Communications
Makers of state-of-the-art repeater controllers and accessories.
http://www.ah6le.net/arcom/index.html
Come see us at Dayton 2005! We'll be In the Repeater Builder Tent
in spaces 707-710 in the Flea Market area!
We now offer complete Kenwood TKR repeater packages!
AH6LE/R - IRLP Node 3000
http://www.irlp.net


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Message: 15
Date: Thu, 12 May 2005 10:57:17 -0700
From: DCFluX <[EMAIL PROTECTED]>
Subject: Repeater Desence

Has anyone had desence due to the fact that the repeaters antenna is
too close to the repeater its self? Like 12 feet of vertical
seperation and 2 feet horizontal?


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Message: 16
Date: Thu, 12 May 2005 14:00:18 -0400
From: Doug Bade <[EMAIL PROTECTED]>
Subject: Re: Looking for Doug B from the 902 group

The Millicom version 100w amp was called an ESP2100 or ESP220 in the SEA
world. I do not have docs on it as I thought we might. Sorry. I can tell
you the radio was turned down to 5w to drive it so as to run it linear
proper....We had tried some other amps over time but the emission mask was
not acceptable in other than the factry one and the Millicom one...

The version we have one of is called an ESP1100. It is a different
animal..

73,
Doug
KD8B



At 11:57 AM 5/12/2005, you wrote:
>Sorry for the crazy post.
>
>Doug B. from the 902 group fame... I'd like to
>contact you direct, but you changed your call
>a while back and I don't have a current Email
>address.
>Please drop me an Email direct. It's Amateur
>Related.
>
>thanks much
>skipp
>
>skipp025 at yahoo.com
>[EMAIL PROTECTED]
>
>ps: if any of you have his current email, please
>feel free to fwd it along.
>
>thanks again...
>s.
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>




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Message: 17
Date: Thu, 12 May 2005 18:06:23 -0000
From: "Bob" <[EMAIL PROTECTED]>
Subject: Speaking of Dayton...

I would be remiss if I didn't issue an invitation to my fellow
repeater-heads who are making the pilgrimage to the Mecca of
RF-Related-Stuff in Southwest Ohio next week to be sure to look for me.

I'll be the middle-aged white guy with a pot-belly and an HT on my
belt...oh, and I may be wearing a baseball cap (thinning hair, dontcha
know).

Ah, I can WAIT for that delicate blend of aromas: char-grilled
burgers, old phenolic circuit boards, overripe porta-potties, and ham
sweat.

Seriously...hope to see and meet a lot of you there.

73,
Bob
K5IQ





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Message: 18
Date: Thu, 12 May 2005 14:09:04 -0400
From: Kevin Custer <[EMAIL PROTECTED]>
Subject: Re: Repeater Desence

DCFluX wrote:

>Has anyone had desence due to the fact that the repeaters antenna is
>too close to the repeater its self? Like 12 feet of vertical
>seperation and 2 feet horizontal?
>

Yes. Had a Hamtronics repeater that wouldn't work in the presence of
its own RF, however it worked fine with a tower mounted antenna.


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