Dave,
I think his point is the FCC doesn't set policy on repeater splits. If you're
not going to get coordinated, you can make up anything you want, but in an
interference dispute with a coordinated machine, you'll lose.
I've often wondered if it would be possible to get all hams with 2M
I am constructing one of the repeater-builders friends', and am in
need of a DTMF pad, or suggestions. I have a Motorola DTMF mic that I
picked up from someone @ work. I have tried it direct into the
controller, through a pot, and through an amplifier w/ a matching
transformer on it. The
Joe,
Are you in the process of building or do you already have a Micor on
220? I am starting on a 220 conversion project with a high band mobile
and am running into problems finding some of the silver-mica caps to
use in the conversion. Any idea on sources?
Thanks,
Jordan
You are incorrect. The local coordinating body will tell you the only
band plan is that which is authorized in the applicable FEDERAL
regulations. NO band plan other than that is enforceable. The ARRL is in
NO WAY A GOVERNMENTAL BODY OR AN OFFICIAL REGULATORY AGENCY! IT CANNOT
BE CONSTRUED AS
Mel,
I am working on a 200 conversion project and I am having troubles
finding the silver-mica caps that i need to complete the conversion.
Do you have any ideas or hints on sources for these components?
Thanks,
Jordan
At 09:05 PM 09/03/08, you wrote:
Ok Great this helps. Any idea the db of isolation say for 50 watts
and .35uv 12db sinad @ 1.7 mhz split?
Eric
N7JYS
-- In Repeater-Builder@yahoogroups.com, Eric Lemmon [EMAIL PROTECTED]
wrote:
Eric,
Your question cannot be answered properly unless you
High Paul,
Yes I fully agree. A sound electronic basis for a split (as well a
economically sound LOL) is the way to go. I just have reached the end of
my rope with some coordinators who believe they are regulatory agencies.
That includes the ARRL. Thanks :-) 73
Dave
Paul Plack wrote:
To All: GE Did make a solid state 200 watt UHF Transmitter. They used a 100
watt PA driver to two 100 watt PA's less the 40 watt driver board and then
recombined the two 100 watt to get 200 watts out.
They sure are not efficient! I agree it would be better to use a 100 watt PA
at reduced power.
There have been example cases where unwanted product generation
has been fixed by replacing portions of the antenna system
coaxial cables with a less or lower Q cable. Some transmit
antenna combiner low-level generation issues have been addressed
with lower-Q coax jumpers.
Not really a
1500 volts at 1 amp is the same as 1500 amps at 1 volt = 1500 watts only
difference is 1 amp requires a small wire and 1500 amps a BIG wire.
Power is power no matter how you get there.
There should be a plug coming from the low voltage supply to the upper left
(from back) of the control
Yeah-heh-Ohio still has a couple of grandfathered repeaters using
240KHz. In fact, the biggest 6M repeater in Ohio is one of those, been
there since the early 70's...oh, and the input is 52.92...
MCH wrote:
Where did you hear that?
It's certainly not true.
1.7 MHz is the split in some
Nate Duehr wrote:
On Sep 3, 2008, at 8:43 PM, kb4ptj wrote:
hi i am looking for ge uhf solid state high power 88 splyt 200watts
There is no GE MASTR II (88-split indicates that you're looking
specifically for a GE product) that does 200W at UHF. The MASTR II
Station/Repeater PA
The typical motorhead mic requires voltage on at least one
pin to power the internal encoder circuit and the electret
mic element. It's also common to have the audio and dc supply
voltage on the same wire/lead, which at first glance seems to
freak a lot of people out... but is actually easy
jlobaugh814 wrote:
I am constructing one of the repeater-builders friends', and am in
need of a DTMF pad, or suggestions. I have a Motorola DTMF mic that I
picked up from someone @ work. I have tried it direct into the
controller, through a pot, and through an amplifier w/ a matching
All Motorola mics are 'pre-amped' mics.
Not accurate...
[paste text]
http://www.merriam-webster.com/dictionary/accurate
Main Entry: ac·cu·rate Listen to the pronunciation of accurate
Pronunciation: \#712;a-ky#601;-r#601;t, #712;a-k(#601;-)r#601;t\
Function: adjective
Etymology: Latin
Underwood capacitors that are the correct size can be found at
www.mouser.com, search for 'MIN02-002'
On Wed, Sep 3, 2008 at 9:33 PM, twoway_tech [EMAIL PROTECTED] wrote:
Mel,
I am working on a 200 conversion project and I am having troubles
finding the silver-mica caps that i need to
If you are looking for through hole silver micas,
http://www.rfparts.com/caps_dippedmica.html
On Thu, Sep 4, 2008 at 8:33 AM, DCFluX [EMAIL PROTECTED] wrote:
Underwood capacitors that are the correct size can be found at
www.mouser.com, search for 'MIN02-002'
On Wed, Sep 3, 2008 at 9:33 PM,
The original project used the style keypad that was meant to add DTMF
to handhelds back in the day, I came across someone that had a bunch
at a ham fest for $5 a pop. Check your or your friends junk box for
and dead HTs from the late 70s and 80s for a keypad unit that
detaches.
A quick ebay
That appears to be old phone pad. Probably will work ok. You will need
to figure out where and how to interface.
73
Dave
DCFluX wrote:
The original project used the style keypad that was meant to add DTMF
to handhelds back in the day, I came across someone that had a bunch
at a ham fest
Fred Seamans wrote:
To All: GE *Did* make a solid state 200 watt UHF Transmitter. They used
a 100 watt PA driver to two 100 watt PA’s less the 40 watt driver board
and then recombined the two 100 watt to get 200 watts out.
They sure are not efficient! I agree it would be better to use a
TMARC (MD, E-WV, N-VA)
Yes, it's for D-STAR, but it's mixed with the analog repeaters. So, you
go from 2 spacings (12.5 kHz 25.0 kHz) to 20 spacings (from 2.5 kHz to
25 kHz) from existing repeaters.
Joe M.
[EMAIL PROTECTED] wrote:
At 9/3/2008 16:11, you wrote:
Those and the local bandplan
In fact, they DID make high power non-tube amps. They used the standard
amps, divided the drive, then combined the output of each amp to get the
higher power.
Joe M.
Joe Burkleo wrote:
Also as Nate said, GE did not make a high power solid state amp. The
Mastr II high power stations that I
That's odd, as the FCC HAS enforced local bandplans in the past. Feel
free to tell them they didn't have the authority to do so.
They cited the persons under the good engineering practice rule.
As for your statements about not being coordinated, read my post again.
I addressed that, and said
Fred Seamans wrote:
To All: GE *Did* make a solid state 200 watt UHF Transmitter.
Thanks Fred,
I was hoping that you or Jeff DePolo would jump in there soon and
straighten these guys out.
BTW: I have one of the stations that Fred mentioned at one of my
sites. It belongs to Jeff
Kevin Custer wrote:
I was hoping that you or Jeff DePolo would jump in there soon and
straighten these guys out.
Yeah yeah yeah... I know, I know. Sheesh.
BTW: I have one of the stations that Fred mentioned at one of my
sites. It belongs to Jeff DePolo.
It will run 200+ watts all day
The math isn't that hard. 200W (53.01 dBm) is about 7.6 dB over 35W
(45.44 dBm), so the RX would have to be about 7.6 dB better than 0.15 uV
(-123.5 dBm), or about -131 dBm which is 0.06 uV.
The antenna gains and losses cancel each other out since they apply to
both TX and RX.
Joe M.
Nate
Motorola MSF-5000 UHF Repeater, Model C44CXB7106BT, covers 403 to 435
Mhz and is rated at 40w. This repeater has been recently tested and is
in perfect working condition. It is programmable with a PC and the
appropriate software (not included). Asking $275 + shipping from
Oshawa, Ontario.
Although what Joe says is true, the system is balanced more so than the math
would indicate. This is due to most users ears requiring more than .15uV
sensitivity to pick out a weak signal. realize that the SINADs of BOTH the
repeater and the mobile rig would be additive when the mobile is in a
Hi, can someone expand on the procedure for retuning
a HRG-(VHF) helical resonator when the 3SK174 is replaced with a BF988.
I have recently sent an email to Hamtronics requesting
further info on their suggestion (on their webpage)
that states It may require some retuning, but as yet there has
Nate Duehr wrote:
KC wrote:
BTW: I have one of the stations that Fred mentioned at one of my
sites. It belongs to Jeff DePolo.
It will run 200+ watts all day and night, and with a good MASTR II
receiver (hand selected) with a Chip Angle preamp, it takes all of the
200 watts to keep up with
Scott Zimmerman wrote:
Although what Joe says is true, the system is balanced more so than the math
would indicate. This is due to most users ears requiring more than .15uV
sensitivity to pick out a weak signal. realize that the SINADs of BOTH the
repeater and the mobile rig would be
...and that's on UHF. Let's talk low-band!
Kevin, thanks for the thoughtful math.
73,
Paul, AE4KR
- Original Message -
From: Kevin Custer
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, September 04, 2008 4:08 PM
Subject: Re: [Repeater-Builder] Re: GE uhf high power
Thanks for your help with that, I took a look at the TCXO for the TX
module today but I'm not sure which way it goes because it has 4 pins
this is what it says on it NKG3001B 4D21 NDK 12.8Mhz
cisfuk wrote:
Thanks for your help with that, I took a look at the TCXO for the TX
module today but I'm not sure which way it goes because it has 4 pins
this is what it says on it NKG3001B 4D21 NDK 12.8Mhz
Did you get the RX VCO to lock?
WRT the TXCO, there are four holes in the circuit
I started too but then the trimmer broke so I'm not sure what to do
about that.
http://img383.imageshack.us/img383/7035/281hg3.jpg my one only has
3? the bottom right is 5v.
Mark,
You have made some reasonable suggestions. I don't think I can do the
surface mount resistor but I might find some equivalent mod possible. I
have looked at the spectrum around the TX and RX frequencies but have
not looked at IF and combinations.
I have to work for a few days now,
Mike, I am on old TV radio/tech repair for RCA and Zenith, so
understandig the voltage is not the question I had. What I am
refereing to, is take for example, I have a 200 watt amplifier that
came from the factory with 6 guage wire on it, much like the kids
that is buying the 4 guage wire to
cisfuk wrote:
I started too but then the trimmer broke so I'm not sure what to do
about that.
http://img383.imageshack.us/img383/7035/281hg3.jpg my one only has
3? the bottom right is 5v.
You must have had a trimmer that had been glued. Look at your local
parts house for a 2 to 10
My CommShop software calculates that an isolation of 78 dB is needed for no
desense. Bear in mind that this software makes a number of assumptions in
computing isolation values, so don't treat the answers as absolute.
Tube-type PAs can get by with much less isolation, due to the lower noise
skipp025 wrote:
All Motorola mics are 'pre-amped' mics.
Not accurate...
[paste text]
http://www.merriam-webster.com/dictionary/accurate
Main Entry: ac·cu·rate Listen to the pronunciation of accurate
Pronunciation: \#712;a-ky#601;-r#601;t, #712;a-k(#601;-)r#601;t\
Function:
n9lv wrote:
Mike, I am on old TV radio/tech repair for RCA and Zenith, so
understandig the voltage is not the question I had. What I am
refereing to, is take for example, I have a 200 watt amplifier that
came from the factory with 6 guage wire on it, much like the kids
that is buying the
- Original Message -
From: KD4PBC [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, September 04, 2008 9:36 AM
Subject: RE: [Repeater-Builder] Re: TPN1132A Wireup help and questions
[snip]
Pictures did not come out as the flash washed them out. I am going there
- Original Message -
From: wd8chl [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Thursday, September 04, 2008 9:55 PM
Subject: Re: [Repeater-Builder] Re: Looking for DTMF encoder...or
suggestions
[snip]
Well, I was leaving out the old carbon mics...
;c}
I've got a
Fred,
I stand corrected. As always, you can teach an old dog new tricks.
Thanks for the correct information.
Joe - WA7JAW
--- In Repeater-Builder@yahoogroups.com, Fred Seamans
[EMAIL PROTECTED] wrote:
To All: GE Did make a solid state 200 watt UHF Transmitter. They
used a 100
watt PA driver
At 9/4/2008 07:35, you wrote:
There have been example cases where unwanted product generation
has been fixed by replacing portions of the antenna system
coaxial cables with a less or lower Q cable. Some transmit
antenna combiner low-level generation issues have been addressed
with
At 9/3/2008 23:03, you wrote:
Dave,
I think his point is the FCC doesn't set policy on repeater splits. If
you're not going to get coordinated, you can make up anything you want,
but in an interference dispute with a coordinated machine, you'll lose.
I've often wondered if it would be possible
Many years ago I experienced a defective section of coax that would change
impedance when physically moved. Found out after slitting open about 12
inches of outer shield the dialectic was dried out and cracked from old age.
When
moved it would form air gaps between the center conductor
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