Does anyone have a pointer to a low level signal source, VHF/UHF?
I don't have a service monitor, and I can't really justify one.
I occasionally need to tune up a receiver.
What I don't have, is a signal source at the 10uV and down level.
I've used HTs and attenuators, but the leakage through
I called him after looking over the website and he is a great guy. Has
been doing this for a long time. Problem is because we are starting from
scratch the XYL says its too much to spend.
So I am trying to contact some clubs to see if they have anything they
would get rid of (even if the boys
The transmitters should be set as close to
Freq-operation as possible.
Use the same service monitor to set up all the
stations unless you have some special type of
alignment equipment.
One trick of the trade:
I used to disable the local station except for the
low level stage while
Hi Gary,
As both a Kenwood Dealer and an LTR System Owner
Operator I can tell you the controller connection
is pretty straight-forward.
Any LTR person will tell you that it's a good idea
to pick a controller brand that works and stay
with it (keeps you from pullling your hair out).
I
Motorola did the same thing... except they added a
resistor in parallel with the diode (which was a
TO-3 case transistor wired as a diode) for a battery
trickle charge.
I took it one step further and made my own style
reverse charge circuit. Only takes a few parts...
skipp
Eric Lemmon
--- Dave VanHorn [EMAIL PROTECTED] wrote:
Does anyone have a pointer to a low level signal
source, VHF/UHF?
I don't have a service monitor, and I can't really
justify one.
I occasionally need to tune up a receiver.
What I don't have, is a signal source at the 10uV
and down level.
We use a bridge rec and an resistor for bat back up ..
as skopp notes the resistor is for current limitting .. so the PS does
not take a jolt if the battas are low
I will see if I can find the drawing and post ot the group .. if not I will
do another and post
nice thing is you can put this
OK sounds great, I would like to use the battery backup option, but I am not sure which terminal are which.. Does anyone have a page showing the hookups and things like that that they could post??
Larry N8RDTNeil McKie [EMAIL PROTECTED] wrote:
Yes, a very good power supply too. Model Number:
Most Astron Supplies will easily operate at 15 volts
output if you mod the crow-bar circuit for the higher
fire/trigger voltage. If fact, they actually work
better at the higher output voltage.
I WOULD NEVER DISABLE THE CROWBAR CIRCUIT IN ANY
ASTRON SUPPLY UNLESS YOU WANT BBQ RADIO. (get my
If you go ahead with a cheap generator as suggested I would like to suggest
the following that worked for me for many years.
When I was going to work on a RX I left the generator on to stabilize which
was usually all the time. I put a tee connector on the output of the
generator and hooked a
The Diode has to be able to handle the max
current and reverse piv. The easy done high
current diode is a properly connected TO-3
transistor (2N3771 maybe) in parallel with
the trickle charging resistor. The transistor
is mounted on a small heat sink, which is
bolted to the supply case.
At 11:54 AM 6/8/2005, skipp025 wrote:
Most Astron Supplies will easily operate at 15 volts output if you
mod the crow-bar circuit for the higher
fire/trigger voltage. If fact, they actually work better at the
higher output voltage.
Well, they end up with a bit less dissipation, due to the
Dave,
A relatively easy thing you can do is to put a Mastr II exciter in a
shielded box with a BNC connector for output. You can easily connect
attenuators directly to the box in line to get your weak signals. This
works on both VHF and UHF. You can also add a small audio oscillator to
At 12:41 PM 6/8/2005, Tony King, W4ZT wrote:
Dave,
A relatively easy thing you can do is to put a Mastr II exciter in a
shielded box with a BNC connector for output.
Hmm.. That would work if I had one.. It would have to be programmed
or crystalled or something, right?
Then again, I think I do
Not sure what you are getting but a suprising amout of prototypeing
material can still be obtained from the local Radio shack, inculding
copper clad board and etchent. For DIY circuit boards I recommend a
product called Press and Peel blue. It is a iron on transfer that you
run through a laser
Thank you very much for making sure I got this
TNX,
KE5CTY (old calls WB5ZQU - WY5L)
http://www.qsl.net/ke5cty/
Code may be dieing but the pioneering spirit that put the code there in
the first place is still going strong.
-Original Message-
From: Repeater-Builder@yahoogroups.com
For circuit board materials and supplies:
Circuit Specialists and Edlie Electronics carry most
supplies.
For circuit boards ready made for assembling projects
from magazine articles (mostly ham radio) Far Circuits
http://www.farcircuits.net/
Paul KB9WLC
--- KE5CTY Bob [EMAIL PROTECTED] wrote:
I have a gp300 that is not allowing me to go below 145.000
all i need is 144.000
i have tried the mods and all that with no luck, need a ver. that will allow
the shift key deal to enter the freq in direct
---
[This E-mail scanned for viruses at TNWEB LLC]
Yahoo! Groups Links
* To
At 6/8/2005 10:41 AM, you wrote:
Dave,
A relatively easy thing you can do is to put a Mastr II exciter in a
shielded box with a BNC connector for output. You can easily connect
attenuators directly to the box in line to get your weak signals. This
works on both VHF and UHF. You can also add a
Laser Printer ?? What's a laser printer ? grin
I wonder if they make that stuff for ink jet printers now, I heard rumor.
I had a laser printer (Panasonic) that still sit's on the shelf today
but has not worked for years due to a bad drum, I think it's time to get rid
of it.
Are laser printers
On Tue, 7 Jun 2005 12:25:15 -0400, R. K. Brumback wrote:
Randy:
No, all the other support chips are not
installed. It only has the Phoenix chip.
By support chips, I mean the other IC's within
the module itself. Along with the personality
EPROM's, there are 14 or 15 other IC, mostly on
the
At 04:29 PM 06/08/2005 -0400, you wrote:
Laser Printer ?? What's a laser printer ? grin
I wonder if they make that stuff for ink jet printers now, I heard rumor.
I had a laser printer (Panasonic) that still sit's on the shelf today
but has not worked for years due to a bad drum, I think it's time
Let's talk about static! Hi everybody!
I'm experiencing high static levels in our repeater that appears to develop ahead and during serve weather outbreaks. Other times it seems perfectly fine.
Could be precipitation static? Wind bouncing the antenna around? Internal grounding problems?
A
At 04:31 PM 6/8/2005, [EMAIL PROTECTED] wrote:
Let's talk about static! Hi everybody!
I'm experiencing high static levels in our repeater that appears to
develop ahead and during serve weather outbreaks. Other times it
seems perfectly fine.
Could be precipitation static? Wind bouncing the
'Tis the large barrier strip on the top edge of the rear of the
chassis.
Neil - WA6KLA
Yahoo! Groups Links
* To visit your group on the web, go to:
http://groups.yahoo.com/group/Repeater-Builder/
* To unsubscribe from this group, send an email to:
[EMAIL PROTECTED]
*
Gee,you can usually find an old Cushman for around $200-$300,mine served
me well...
Dave VanHorn wrote:
Does anyone have a pointer to a low level signal source, VHF/UHF?
I don't have a service monitor, and I can't really justify one.
I occasionally need to tune up a receiver.
What I don't
DESCRIBE THE STATIC..
Maybe static is the wrong word... Its more like loss of signal, like mobiles becoming HT's and HT's without antennas!
Like the receiver wants to hide ... (Hi, Hi)
My only concern about wind vibration is that the antenna hasn't been played with. We have
I sold one (work) last year for $50. just to get it out of my way.
- Original Message -
From: Q [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, June 08, 2005 5:48 PM
Subject: Re: [Repeater-Builder] Small Signals
Gee,you can usually find an old Cushman for
At 01:32 PM 6/8/05, you wrote:
At 04:29 PM 06/08/2005 -0400, you wrote:
Laser Printer ?? What's a laser printer ? grin
I wonder if they make that stuff for ink jet printers now, I heard rumor.
I had a laser printer (Panasonic) that still sit's on the shelf today
but has not worked for years
At 02:31 PM 6/8/05, you wrote:
Let's talk about static! Hi everybody!
I'm experiencing high static levels in our repeater that appears to
develop ahead and during serve weather outbreaks. Other times it seems
perfectly fine.
Could be precipitation static? Wind bouncing the antenna
around?
Another thing to keep in mind is what type
of support is it? I remember many years ago noise bursts would show up soon
after rain when we had a bit of wind on a local VHF repeater, it ended up as the
used connector they had installed on the 7/8th and of course on the top side.
This is in
Dave VanHorn [EMAIL PROTECTED] wrote:
At 11:54 AM 6/8/2005, skipp025 wrote:
Most Astron Supplies will easily operate at 15 volts
output if you mod the crow-bar circuit for the higher
fire/trigger voltage. If fact, they actually work
better at the higher output voltage.
Well, they end up
20 or so years ago, we had one site with three (3) 100 watt
continuous duty 150 MHz (range) Micor Repeater Stations.
Each station had the Micor TPN1105A/TPN1106A switching power
supplies - the outputs all run in parallel, float charging 2
each 8D 'cat' batteries.
Paralleling
Fuse the input of the supply appropriately, so that
it will blow if the output is held to maximum for 10
seconds or so. See the buss guide called Fuseology
on selecting fuses.
I'm not a fan of the above fuseology methods. I would
hope to reduce any glitch events to a much smaller
amount
Dave VanHorn wrote:
If you've not seen what happens in southern CA with the Santa Ana
winds, you'd never believe it.
AMAZING levels of noise right across the VHF spectrum.
AFAIK, not much you can do about that.
Yes you can
http://www.repeater-builder.com/antenna/static.html
At 06:51 PM 6/8/2005, Kevin Custer wrote:
Dave VanHorn wrote:
If you've not seen what happens in southern CA with the Santa Ana
winds, you'd never believe it.
AMAZING levels of noise right across the VHF spectrum.
AFAIK, not much you can do about
that.
Yes you can
hERE IS A SILLY QUESTION:
Where would you want to mount a static buster on a 4-bay antenna? On the top of the mast? I looked at the mounting instructions and that is the conclusion I have come too, but I could be way off.
Tom
W9SRVMike Morris WA6ILQ [EMAIL PROTECTED] wrote:
At 02:31 PM
- Original Message -
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, June 08, 2005 8:31 PM
Subject: TPL Amplifier
I have a TPL
amplifier repeater grade rack mount.
UHF 5 watts in
100 watts. Had the ASTRON power supply lock up the other day
and put out 15 volts + did
At 07:25 PM 6/8/2005, TGundo 2003 wrote:
hERE IS A SILLY QUESTION:
Where would you want to mount a static buster on a 4-bay antenna? On
the top of the mast? I looked at the mounting instructions and that
is the conclusion I have come too, but I could be way off.
Seems right..
This would help
At 07:34 PM 6/8/2005 -0500, you wrote:
This would help in the case of an approaching thunderstorm, where the
charged leaders are beginning to form.
---You could always just have a beer. Then 30 minutes later, you'd have a
Corona discharge!
Ken
There is a fuse on it. I don't have the book handy and can't remember
the exact size.
Johnny
Maire-Radios wrote:
- Original Message -
To: Repeater-Builder@yahoogroups.com
mailto:Repeater-Builder@yahoogroups.com
Sent: Wednesday, June 08, 2005 8:31 PM
Subject: TPL Amplifier
At 06:14 PM 6/8/2005 -0700, you wrote:
There is a fuse on it. I don't have the book handy and can't remember
the exact size.
---An educated guess for a 100 watt out UHF amp would be a 25 amp fuse...
Ken
--
President and
John,
Without knowing the model number, it's difficult to answer the
question. I have a TPL amplifier PA6-1AE-RXRF, which takes 5 watts in
and gives 100 watts out. It does not have any fuses in it, but it does
have a resettable circuit breaker rated at 25 amperes on the DC input.
Some of the
guess I will try to make it to the tower in the AM.
thanks John
- Original Message -
From: Eric Lemmon [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Wednesday, June 08, 2005 9:40 PM
Subject: Re: [Repeater-Builder] Fw: TPL Amplifier
John,
Without knowing the model
Tedd,
All IC's are in place and soldered as you mentioned. All appears to
be as factory and I cannot see anything that looks like it has been monkeyed
with.
I hope to be able to take a closer look at it tomorrow and maybe check some
voltage points, connections, wires and such.
Randy B.
I have a TKR-850 that is hooked to an external controller (Link Comm.
RLC-3) and I want to have CTCSS on COR. Anyone know where to connect
to mute the sub-audible tone generated in the TKR-850? I would like to
retain the internal CTCSS. It currently encodes continuously and see
no
has anyone out there got a Micor repeater PA UHF 75 watt, installed with a
non Motorola repeater? if so what do you do with the yellow control wire?
I know you can not have more that 2 watts in. Do you know what the lowest
power it takes to drive the amplifier?
thanks John
- Original
Does anyone have access to the technical description of the subject
duplexer? It is six cavites all in a single row with 4 for receive and
2 for transmit. Any experience in ham repeater use that you could
share with me?
Please respond direct to me [EMAIL PROTECTED]
Yahoo! Groups
I got my new yaesu 9000 radio, without the ce60 software as promised but
thats another story.
Now the next component in the rack system.
I can get a mobil duplexer for $240 off e bay rated at 50 W and tuned to my
fx's or I can get something very expensive, over a grand it appears.
celwave, tx
Look in the software :optional features,AUX inputs; there is
Aux In pins that you program diferent actions, program
one
for QT/DQT encode enable/disable and
control it with one of the
output lines of the RLC-3 ( look page J-1 of the manual ); by
the way
my manual has two errors there:
At 08:44 PM 6/8/2005 -0700, you wrote:
Look in the software :optional features,AUX inputs; there is Aux In pins
that you program diferent actions, program one for QT/DQT encode
enable/disable and control it with one of the output lines of the RLC-3
---Sorry but that won't work. Kenwood's
Just a thought but have you tried replacing your lightning
protectors?
Mike
- Original Message -
From:
[EMAIL PROTECTED]
To: repeater-builder@yahoogroups.com
Sent: Wednesday, June 08, 2005 4:31
PM
Subject: [Repeater-Builder] WEATHER
RELATED STATIC
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