Most likely it helps avoid ground loop hum assuming the green wire is
connected to the case.
I have a computer switching power supply converted for 13.8V which does have
the neg. connected to the case and the green wire and in some situations it
does have 60 cycle hum.
John Lock
kf0m at arrl.net
v4.74
or v5.281 to see if that will address your controller problems.
John Lock
kf0m at arrl.net
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:repeater-buil...@yahoogroups.com]on Behalf Of thornwal
> Sent: Monday, January 18, 2010 7:20 AM
> To: R
Amplifier Repairs and updates DC to Microwave
Tube and Solid State
6M Conversions
45 years experience
Carl Huether [k...@jeremy.mv.com]
John Lock
kf0m at arrl.net
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com]on Behalf Of Tim and Ja
utput power
if you keep increasing the drive it isn't worth the risk of blowing it up.
John Lock
kf0m at arrl.net
See comments threaded in below
John Lock
kf0m at arrl.net
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com]on Behalf Of Karan Bakshi
Sent: Tuesday, December 08, 2009 5:39 AM
To: Repeater Builder
Subject: [Repeater-Builder] Need
Here is the ultimate repeater site mouse trap from the repeater builder
archives in 2003. I was really surprised no one else had trotted it out yet.
I also remember someone posting a picture to show that it really worked.
John Lock
kf0m at arrl.net
--- In Repeater-Builder@yahoogroups.com
2027
you will need to set the clock back to the year 1971 again to keep it going
another 28 years.
John Lock
kf0m at arrl.net
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:repeater-buil...@yahoogroups.com]on Behalf Of wa6mha_glen
> Sent: Tuesday, J
feet away due to lightning strikes but never had any damage to the G7.
John Lock
kf0m at arrl.net
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:repeater-buil...@yahoogroups.com]on Behalf Of skipp025
> Sent: Monday, June 01, 2009 11:22 AM
> To: R
even remotely consider non professionals on the tower.
John Lock
kf0m at arrl.net
Rotron went belly up last year. We used lot's of there fans where I work
and had to really scramble to find replacements in a short time frame. If
you want an exact rotron fan, it will be limited to what you can find on the
used surplus market.
John Lock
kf0m at arrl.net
> -
ad to move our top antenna down to just above the FM antenna to get out
of the way of the UHF antenna. That move cost us about $5k for the climb.
We haven't been able to decide if the loss in height was offset by the
reduction in feedline loss but it seems pretty close.
John Lock
k
ather.
With the repeater in the air, everything needs to be super rugged with as
much redundancy as you can manage and as modular for swapping parts in and
out as possible. It is absolutely no fun to try and work on anything at
that height in the winter.
John Lock
kf0m at arrl.net
> -Original
m and the repeater.
John Lock
kf0m at arrl.net
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] Behalf Of n9lv
> Sent: Friday, November 21, 2008 8:33 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Re: 2.4
Well if you can hear a commercial FM station coming through your repeater it
could be a spurious STL. We have chased down two different malfunctioning
STL's here in the last ten yrs that had spurs that would drift around across
several repeater frequencies.
John Lock
kf0m at arr
in that power supply is working for sure. Of course shipping from KS to
NH could be expensive.
John Lock
kf0m at arrl.net
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] Behalf Of wa1nh
> Sent: Friday, September 05, 2008 12:16 PM
&g
the antenna is blocked by the tower. Note this is a big broadcast tower,
legs are 4" in diameter with about a ten foot tower face.
John Lock
kf0m at arrl.net
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] Behalf Of Don Kovalchik - W8DPK
May 2002 QST had the computer power supply conversion article
QST switching power supply product reviews are July 2006, January 2000, and
Sept 2000
John Lock
kf0m at arrl.net
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] Behalf Of Er
reviews in QST. Those showed
much less RF noise.
Unfortunately I didn't have a spec ana. to check it but it hasn't caused
any RF problems for the low power repeater that it has been running for the
last 6 months..
John Lock
kf0m at arrl.net
-Original Message-
Fr
also wondered why they stuck with just cell phone towers and didn't really
touch on broadcast towers or the view from 1000+ feet.
John Lock
kf0m at arrl.net
>
> Chuck Kelsey wrote:
> > Very disappointing program. Mostly fluff.
&g
Lock
kf0m at arrl.net
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] Behalf Of Rick & Charlotte
> Sent: Monday, March 24, 2008 2:22 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] 24 vdc to 12vdc
>
&g
x27;t seem to
like that as well. We always ran it at about 200W before when it was in
operation.
Now I just need to schedule some help to load it in the pickup and then take
the 60 mile drive to the repeater site.
John Lock
kf0m at arrl.net
> -Original Message-
> From: Repea
John Lock
kf0m at arrl.net
-Original Message-
From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] Behalf Of
[EMAIL PROTECTED]
Sent: Monday, February 25, 2008 5:17 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: Motorola TLD6612A
Thanks skip I didn't think about looking on E-bay but I also wasn't certain
if it was Mica. It is some what clear and brittle and seems to be in thin
layers that will flake off.
John Lock
kf0m at arrl.net
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
rectangular piece of clear material
that looks like mica. I tried adding some Teflon tape to cover up the
puncture.
When I fired up the amp today, It arced through again during the tune up
process. Anyone have suggestions for a replacement or have one in their
junk box?
John Lock
kf0m at
We have two ExecII mobiles in the same set up 2 mtr Rx 70cm Tx. One of them
will quit working when it gets cold. I have seen both low Tx audio and low
power output until it warms up. I haven't been able to be at the site when
it isn't working to try and figure anything out.
John Lo
Try Wd5ago in Tulsa OK. He is a well respected preamp builder in EME
circles and also builds and sells stuff for the SETI program. You can
usually catch him on the 70cm EME net Saturday mornings 14.345
John Lock
kf0m at arrl.net
> -Original Message-
> From: Repeater-B
conversion just seems to be forgotten in the propaganda.
John Lock
kf0m at arrl.net
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] Behalf Of MCH
> Sent: Sunday, January 06, 2008 2:19 PM
> To: Repeater-Builder@yahoogroups.com
> Subj
see if
he remembers anything about the construction inside.
John Lock
kf0m at arrl.net
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] Behalf Of Paul N1BUG
> Sent: Wednesday, October 24, 2007 11:20 AM
> To: Repeater-Builder@
ng that all the equipment in
the rack still worked fine made me a believer in using MOV's.
John Lock
kf0m at arrl.net
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] Behalf Of Eric Lemmon
> Sent: Thursday, September 27, 2007
over for not having a county sticker and those that will be pulled over for
not having a county sticker.
John Lock
kf0m at arrl.net
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] Behalf Of Nate Bargmann
> Sent: Thursday, September 27,
here is another Midwest repair center for IFR I have no connection and no
experience with this one It was posted several months back on the list.
http://www.kgelectronics.com/repair.html
John Lock
kf0m at arrl.net
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
>
Tey this site which was posted a few months back on this reflector. I don't
know anything about this shop just remember seeing the post.
http://www.kgelectronics.com/repair.html
John Lock
kf0m at arrl.net
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
>
cs of the installation I am talking about can be seen at www.warc1.org
John Lock
kf0m at arrl.net
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] Behalf Of s3hampton
> Sent: Sunday, July 29, 2007 6:19 PM
> To: Repeater-Builder@yahoogr
John Lock
kf0m at arrl.net
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] Behalf Of skipp025
> Sent: Friday, June 29, 2007 11:09 AM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Lunar & Angle Linear
>
Hey Skip you probably already know this but I have pulled the label off of
several Lunar preamps and they always say Angle Linear underneath the Lunar
label.
John Lock
kf0m at arrl.net
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED]
Our DB228 is close mounted to the tower leg
using DB365 clamps top middle and bottom of each section.
John Lock KF0MWichita KS kf0m at arrl dot net
-Original Message-From:
Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED]On Behalf Of
[EMAIL PROTECTED]Sent
to the other
arrangement.
John Lock KF0MWichita KS kf0m at arrl dot
net
-Original Message-From:
Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED]On Behalf Of Roger
WhiteSent: Saturday, February 11, 2006 7:40 AMTo:
Repeater-Builder@yahoogroups.comSubject: [Repea
spark gap transmitters.
John Lock KF0M
Wichita KS
kf0m at arrl dot net
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] Behalf Of Dick
> Sent: Friday, December 30, 2005 6:43 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [
own
a very omni directional pattern if there are any nulls they do not seem to
be significant in size or in a populated area.
With the antennas close mounted, the tower seems to effectively shadow each
antenna from the other so that there is minimal interaction between the two
antennas.
John Lo
of the screws were
just finger tight.
John Lock KF0M
Wichita KS
kf0m at arrl dot net
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] Behalf Of k9jac1
> Sent: Friday, June 10, 2005 4:01 PM
> To: Repeater-Builder@yahoogroup
sue of the
SWOT newsletter.
John Lock KF0M
Wichita KS
kf0m at arrl dot net
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] Behalf Of Eric
> Sent: Monday, May 23, 2005 12:11 AM
> To: Repeater-Builder@yahoogroups.com
> Subject: [
.
John Lock KF0M
Wichita KS
kf0m at arrl dot net
> -Original Message-
> From: russ [mailto:[EMAIL PROTECTED]
> Sent: Thursday, January 27, 2005 4:50 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] DB-224 Spacing Came Out Ok
>
>
>
> Hey M
inch element to extend them
out to the 37 inch dimension.
John Lock KF0M
Wichita KS
kf0m at arrl dot net
> -Original Message-
> From: highlandfl [mailto:[EMAIL PROTECTED]
> Sent: Sunday, January 23, 2005 5:05 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeate
nd it
has 35 inch loops on an 18 ft mast.
John Lock KF0M
Wichita KS
kf0m at arrl dot net
> -Original Message-
> From: Mathew Quaife [mailto:[EMAIL PROTECTED]
> Sent: Sunday, January 23, 2005 4:08 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: RE: [Repeater-Buil
T-139 and my Tx audio is fed into the base
of TR27 which I believe is called an active audio filter..
John Lock KF0M
Wichita KS
kf0m at arrl dot net
> -Original Message-
> From: Ralph Hogan [mailto:[EMAIL PROTECTED]
> Sent: Wednesday, January 19, 2005 7:28 AM
> To:
70.5, 69, 63.5, 68, 67.5, 64.5, and 68.5 inches. So take your pick. These
have the 37 inch elements on the 22 ft mast.
Also, I found all of the nuts loose that attach the harness to the elements
so be sure and torque them down before you put it up.
John Lock KF0M
Wichita KS
kf0m at arrl dot net
about
offsets the feedline loss for receive.
John Lock KF0M
Wichita KS
kf0m at arrl dot net
> -Original Message-
> From: Maire Company [mailto:[EMAIL PROTECTED]
> Sent: Thursday, November 04, 2004 11:22 AM
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Buil
HT but can't hear it on the rubber duck.
John Lock KF0M
Wichita KS
kf0m at arrl dot net
> -Original Message-
> From: Kevin Custer [mailto:[EMAIL PROTECTED]
> Sent: Wednesday, November 03, 2004 8:09 AM
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Buil
ontinue with at the new height.
Question is should we try to obtain some ice breakers and install them above
the antennas to protect from falling ice?
John Lock KF0M
Wichita KS
kf0m at arrl dot net
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yah
hich we plan to continue with at the new height.
Question is should we try to obtain some ice breakers and
install them above the antennas to protect from falling
ice?
John Lock KF0MWichita KS kf0m at arrl dot
net
Yahoo! Groups Links
To visit your group on the web, go to:http://g
Thanks Joe that was a fun read.
John Lock KF0MWichita KS kf0m at arrl dot net
-Original Message-From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]Sent: Tuesday, April 13, 2004 12:20
AMTo: Repeater-Builder@yahoogroups.comSubject: Re:
[Repeater-Builder] Re: Audio
My freq counter has a 10 Mhz time base. It radiates enough signal to be
picked up in my HF receiver. I just tune in 10Mhz WWV and zero beat the
freq counter oscillator against the 10 Mhz WWV signal.
John Lock KF0M
Wichita KS
kf0m at arrl dot net
> -Original Message-
> From: ian
I have a Kenwood UT-50S 6 meter module for the TM742/642/942 series radios
for sale. I don't think it has ever been plugged in to a radio. It does
not have the mounting hardware (the long screws and the power bus bar).
Asking $150.
John Lock KF0M
Wichita KS
kf0m at arrl dot net
You
53 matches
Mail list logo
