Yes here in Dallas. Google is a very good place to start. They have been
very helpful in finding parts in the past.
Charles Miller
- Original Message -
From: KE5CTY Bob [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, June 05, 2005 9:30 PM
Subject: Re:
Several things to check,is the power supply voltage dropping off? Does
the current drop when the power drops? Check exciter output and
alignment. Check all high current connections in the
amp,collectors,power rails,pass transistor,power combiner coil. Re-check
the output link to the filter
How about Fry's ? I think I saw one in January almost completed somwhere
between Dallas and FTW when I was in the area for 3 days. It looked finished
but
when I pulled into the parking lot it was not ready for opening yet. 3-4
years ago I was in a Fry's (several)in the Redwood Shores /San Jose
I've got a VOX recoding program that works well I could transfer to you
(public domain I think) There are programs for some of the computer
controllable scanners like the RS 2052 and Unidens that will not only
record but time stamp each set of recordings.
Mark A. Holman wrote:
The thing
At 09:04 AM 6/6/2005, Ronny Julian wrote:
I've got a VOX recoding program that works well I could transfer to you
(public domain I think) There are programs for some of the computer
controllable scanners like the RS 2052 and Unidens that will not only
record but time stamp each set of recordings.
GPS disciplined oscillators are only about $300.00 to $400.00 ea.
on the used market today The HP Z3801a series have been appearing for
the last few years, retired from Cellular. 10 Mhz at about 1 Hz at a gHz or
better.
Drive a Flex Crystal oscillator or better yet a
Regardless of what you might think... scrap tv
sets of all ages are good part sources. Another
great idea is used PC Computer power supplies.
Even though I'm well past the need, I'm not
too proud to pass up good parts.
cheers,
skipp
KE5CTY Bob [EMAIL PROTECTED] wrote:
I have been all
well for some reason i just can not think of this. or im getting to old
,,hehe
what is the formula for DB ( power )?
---
[This E-mail scanned for viruses at TNWEB LLC]
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At 11:22 AM 6/6/2005, Brent wrote:
well for some reason i just can not think of this. or im getting to old
,,hehe
what is the formula for DB ( power )?
Which one?
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At 11:22 AM 6/6/2005 -0500, you wrote:
well for some reason i just can not think of this. or im getting to old
,,hehe
what is the formula for DB ( power )?
---Here's a link:
https://ewhdbks.mugu.navy.mil/decibel.htm
Ken
Power gain = 10log P-Out/P-In
- Original Message -
From: Ken Arck [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Monday, June 06, 2005 9:42 AM
Subject: Re: [Repeater-Builder] formula for DB -Power
At 11:22 AM 6/6/2005 -0500, you wrote:
well for some reason i just can not
Anyone have the RSS for a Motorola Micom 2?
This for one of the hams near me.
Thank you in advance,
Neil - WA6KLA
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Power gain G is defined as the ratio of output
power to input power:
G = Pout/Pin
Bel power gain G' is defined as the common logarithm
(log to the base 10) of power gain:
G' = log G
If a circuit has a power gain of 100, it's bel power
gain is G' = log 100 = 2
The prefix used in common
On Sun, 5 Jun 2005 10:09:58 -0400, R. K. Brumback wrote:
The computer appears to be ok, but will not report the program storage
module as a peripheral.
Hi Randy:
First thing to check is the ribbon cables joining the
three boards together. I bought a 2310 as a spare a couple
years ago, and found
Has anyone installed a CommSpec Programmable ID Board into a GE Mastr
II Rack?
Can anyone let me know the wiring so we can get our 440 machine on
line.
Thank you,
Walter, KA2RGI
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When I went to work this mornining, I noticed that the signal level from the
repeater seemed to be down a little. I contributed it to band conditions
and decided to check it after work. As I was leaving work, I got a phone
call saying the repeater was hung in transmit. This was caused by a
To convert a power ratio to dB, the formula is 10 log Po/Pi. For example,
if you had an amplifier that took 2 watts input and provided 40 watts
output, that ratio is 40/2 = 20. The common logarithm (base 10) of 20 is
1.30..., and multiply that by 10 and you get 13.01 dB gain.
Likewise, if you
If the heatsink was very hot, then I would assume that the PA
transistors were working. Obviously, there are better methods to verify
this. But lets say they were working, I would check the jumper between the
PA filter boards. This is a common failure point on UHF PAs as well. Does
your
- Original Message -
From: NØATH
To: Mastr II Group
Sent: Monday, June 06, 2005 8:07 PM
Subject: Lo Band PA
Hello to the group -
Question number 1
I have an extralo band GE Mastr II mobile PA
and was
looking at a schematic on the repeater-builder
site. I have lost the way to
Yes,it is 50 ohms and should work just fine,but you wont have any
control over output power. On the Mic audio,there is a pot on the front
of the 10V REG card for mic gain. I hope he isnt using the mic input for
transmit audio! 73,Lee
NØATH wrote:
**
- Original Message -
*From:*
I am in the middle of a dispute
about Q
I am saying that Q control sets the width
of the band of freqs. that will be boosted or reduced..
it affects the amount of freq. around the
center freq. which will have a similar amount of boost or reductions. the with
of the band is given in
At 09:20 PM 6/6/2005, Brent wrote:
I am in the middle of a dispute
about Q
I am saying that Q control sets the
width of the band of freqs. that will be boosted or reduced..
it affects the amount of freq. around the center freq. which will have a
similar amount of boost or reductions. the
Q is figure of merit. The Q of a circuit determines how selective it is. In
a filter the Q would be an indication of the slope of the skirt. The higher
the Q the sharper the slope of the skirt and the more rejection available
to the filter. In a capacitor it is how lossy the capacitor is, the
Lee thanks so much - every now and then something comes along that makes a guy
pretty happy.
And you were right on , on the mike setting - fixed him right up,
Thanks again Dave
- Original Message -
From: Q [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Monday, June 06,
Q = gain = inverse Bandwidth in that:
A higher Q = a lower (narrower) bandwidth.
A lower Q = a higher (more broad) bandwidth.
You could also say Q = selectivity. High Q = High selectivity.
Joe M.
Brent wrote:
I am in the middle of a dispute about Q
I am saying that Q control sets the
No I didn't pick this thing up at Dayton. I inherited it as part of a
community RX antenna system I now maintain.
It's original tuned freq. (as stamped on the label) was 455.90 to 459.50
MHz. It was tuned to our SoCal 440 repeater input band, but was tuned to
favor the low end had 5 dB of
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