You're right Nate.
These people will only notice 3 dB in their dreams.
We could change power on their repeater day to day and they'd never know the
difference.
Bill - W6CBS
_
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Nate Duehr
Sent: Friday,
One of my standard lines:
Standards are good, because there are so many to choose from.
Bill - W6CBS
_
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Nate Duehr
Sent: Friday, November 02, 2007 11:40 PM
To: Repeater-Builder@yahoogroups.com
OK, more questions for the collective. (Yes, I know - doesn't he ever
quit?? hehehe)
I'm about to delve into converting one of the 150W Motorola STF2520A power
amplifiers for my 900 MHz repeater. I read on the VHFSouth web page, where
the conversion/modification procedures are listed,
At 11/2/2007 22:30, you wrote:
Only if you're using a rig with a skewed S-meter (and today many are
made that way). There are standards for proper S-meter calibration.
No S-meter involved. A 3 dB increase in signal can make the difference
between unreadable readable.
Bob NO6B
--- MCH [EMAIL PROTECTED] wrote:
Only if you're using a rig with a skewed S-meter
(and today many are
made that way). There are standards for proper
S-meter calibration.
While most people seem to agree that there is a
standard, almost no receiver is calibrated to the
'standard'. The low
Hi Guys,
A question for the MICOR fans that may have experienced a similar
dilemma I am having with one of our three Micor Repeaters. All three
are Micor VHF Bases, converted to repeater duty using the information
I obtained from this group. All three have Cat 200 Controllers and
unless I have
Jim,
If the end-to-end audio pre-emphasis and de-emphasis is not complementary,
the audio will sound very bright, tinny, and noisy. Also, check to see if
the audio is getting pre-emphasized twice- that will really make it bright.
If you have access to an audio sweep generator and a digital
One more commentlet's see if I can make it without getting egg on my
face...
The older receivers such as my Collins 74A4 called for a 100uv (that's
microvolts) input to get S9 and my Kenwood 820 said 50uv for the same...so
that should give you an idea how important it is to give a 59
Hi All
I have a Singer/Gertsch FM10C , sn 135 with a bad scope.
The Oscope is Singer model ODM 1 Sn492
I have traced my problem, (noise on scope trace) to the Vertical Amp Board
The board in my ODM 1 is a 5-003204-005 Revision D
My manual has the diagram of a 4-003204-008 Revision A3
The IARU has a recommended level. Go here:
www.algonet.se/~k-jarl/ssa/IARU/smeter.html
I found this link on the ARRL Web site. -93 dBm equals 5 uV, -73 dBm equals
50 uV, and -67 dBm equals 100 uV.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
Jim, this can easily happen with any brand of repeater, if audio is
not adjusted correctly.
The transmitter has a deviation control, yes? Well, that control has
nothing to do with what I am talking about. Some transmitters could
have another control called -mic gain-, -mic sensitivity-,
On Fri, 2 Nov 2007, wb6ymh wrote:
The 30 watt version is a better radio for repeater service since all
solid state transmitters are very inefficient when run below their
designed output. A 30 watt Mitrek running at 15 watts will probably
last forever, but a 50 watt Mitrek running at 20
Thanks for the information Eric. I don't have the equipment you mentioned,
but I will retrace everything on this repeater compared to the original and
see if something is different that hopefully pops out.
73 Jim KA2AJH
_
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL
Hello All,
I have on the bench a working universal exciter presently on
931.7125. I need to obtain a new channel prom for it with two new
frequencies in it for the ham band.
Does anyone out there have this ability in which I could purchase
from? If so, please reply off list with how much for
Looking for the schematic for a Yaesu /Vertex CD15A.
Charger is used with the Yaesu/Vertex VX-7R
I can't seem to find any information anywhere.
Can anyone help
Ralph, W7HSG
---BeginMessage---
On Fri, 2 Nov 2007, wb6ymh wrote:
The 30 watt version is a better
I looked through the service manual for the VX-7R on the off chance that it
would have the charger schematic, but there was no mention of it.
Richard
http://www.n7tgb.net/ www.n7tgb.net
_
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED]
Hi All
Looking for information on who makes crystals for channel elements.
Micor's and Mitrek
Yes, I know that International makes them but the price is high.
I have had good luck putting crystals in old channel elements and changing the
caps as necessary
to achieve reasonable stability.
Put your MICOR speaker on the (mobile?) radio you are listening to, this
will give you an apples to apples comparison.
I use a MICOR speaker in my work truck, it's connected to a Kenwood 742,
and yes, it makes a BIG difference.
Kevin Custer
Jim Cicirello wrote:
Hi Guys,
A question for the
Repeater Builder uses BOMAR for the most part, ICM for the rest.
http://www.bomarcrystal.com/
Kevin
[EMAIL PROTECTED] wrote:
Hi All
Looking for information on who makes crystals for channel elements.
Micor's and Mitrek
Yes, I know that International makes them but the price is high.
I
Ralph,
Check out BOMAR crystals. You might be surprised at their prices. Also, I
believe that Repeater-Builder, the company, uses them. Check in with Kevin
and Scott to get all of the particulars. Go here:
http://www.bomarcrystal.com/home3.htm
Don, KD9PT
- Original Message -
Folks,
I just got a Zetron 38A at a hamfest. Works fine in the repeater but I
have tried the password code and no results. It is listed in the book
as 12123#. Someone must have changed it... What do I do now? Can it
be set back to a factory default?
thanks,
ron
take out the chip with the battery and unplug the chip from the battery give
it 3 mins or so and put it back should default.
- Original Message -
From: rwjohn49
To: Repeater-Builder@yahoogroups.com
Sent: Saturday, November 03, 2007 9:11 PM
Subject: [Repeater-Builder]
Ralph,
Before you make a decision on your supplier, please read the following
article:
www.repeater-builder.com/tech-info/temperature-compensation.html
Unless you have a testing laboratory equal to that found in a commercial
crystal house, I suspect that your good luck is more likely blind
Eric, Thanks for the reply
Lab is not equal to testing lab but is OK. Cumex were cheap crystals and
managed to compensate ok.
Bomar which everyone seems to recommend makes much better crystals. I have a
small oven and an ERI counter good to .1 hz at 440. I can cycle and adjust
within
Hi all
if someone would have a pair of used Channell elements with their crystals,let
me know with your frequency!
i needa pair and maybe i can find here a set that would tx in my region,
thanks for your help
gervais ve2ckn
_
I use Bomar these days for crystals for the ham bands. I have had good luck
installing them myself and re-adjusting them in a year or so back to the right
frequency.
I recently worked on a GE Delta radio that had been crystaled using CUMEX and
found the receive crystal had drifted over 2
Look inside the unit and find the ram IC that is plugged into the Dallas
Semiconductor battery backup chip. Remove the ram IC from the battery backup
chip for several seconds and plug it back in. It will default back to the
factory original 12123.
The controller will not be in the
This may be out in left field, but I have built several repeaters using the
CAT300 controller (not the CAT200) and the 300 had no way to de-emphasize the
discriminator audio. I have used an external series 15 K and shunt .22 cap to
supply the discriminator audio to the CAT300 and it sounds
Thanks Laryn, I will take the service monitor and on duplex I can put in 2
or 3 kHZ and read the output and see if it is the same. Good idea!
73 JIM
_
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Laryn Lohman
Sent: Saturday, November 03, 2007 3:15
I will recheck that Circuit Jim. It won't hurt to double check.
73 and thanks JIM KA2AJH
_
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Jim Brown
Sent: Sunday, November 04, 2007 12:25 AM
To: Repeater-Builder@yahoogroups.com
Subject: RE:
Thanks Kevin. I have a list to include a 1/8 plug and clip leads. That will
tell me as you suggested. I have got a lot of good ideas from the group.
73 Jim KA2AJH
_
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Kevin Custer
Sent: Saturday,
I just went (actually, AM GOING) through an order with ICM. Boy have
they changed in the last 10 years. Orders take much longer than they
used to. I went with ICM because this particular order I wanted to be
flawless. I should have stuck with Bomar.
Joe M.
Jim Brown wrote:
I use Bomar these
Doies anybody have a 7011 99ch 35w mobile in good shape they want to sell?
--
Jay Urish W5GM
ARRL Life MemberDenton County ARRL VEC
N5ERS VP/Trustee
Monitoring 444.850 PL-88.5
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