Michael C.
Johnson101 W. Laurens St.Laurens, SC 29360Voice:864 984 4633Fax:
864 984 6213E mail: [EMAIL PROTECTED]
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This is a little off topic but is repeater related so here it goes.
I bought some what I believe are two tone sequenchial decoders made by Solid State Comunications Inc. out of Hayward California from the smasher in Dayton last weekend. I have done a search for info on them but can not find
At 05:10 AM 5/23/2005 -, you wrote:
I was looking at using a MFJ-9406 6 Meter SSB radio for a 6 meter
remote base at my reapeater site. Any Ideas on how to get a COS/COR
signal out. I thought about using a CAT Tech SQ-1000 Squelch board but
didn't know how it would handle the pulsing nature of
[EMAIL PROTECTED] wrote:
Greetings, All
I have acquired a portable repeater made by Harris Law Enforcement
Products out of Melbourne, FL. It has a Icom IC-R1
Receiver, along with a Icom IC-2SAT VHF radio. I'm looking for any info on
this unit. I think the model# is: HLE-FB-2601
any
Hello We have installed a Micor mobile repeater . This is what is
happening...When first turned on our Identifier is transmitted out
over the air with no problemWhen someone tries to use the
repeater it goes into transmit but the audio doesn't get sent with the
carrier. We can hear
Hey Ken,
Can you direct me to the schematic for the squelch circut?
Regards,
-Steve
- Original Message -
From: Ken Arck [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Monday, May 23, 2005 7:45 AM
Subject: Re: [Repeater-Builder] SSB Remote Base
At 05:10 AM 5/23/2005
At 09:26 AM 5/23/2005 -0700, you wrote:
Can you direct me to the schematic for the squelch circut?
---Sorry about that! This was a project I did many years ago and haven't
looked at for a while (hence the lack of a link to the schematic on the
webpage!)
http://www.ah6le.net/hfsquelch.bmp
Ken
Motorola made a voice sensitive squelch circuit for the HF Micom
2-way a number of years ago. In those days, was all separate
components - the diagram is available if you are interested.
Perhaps Mike / Kevin would be interested too?
Neil
Ken Arck wrote:
At 05:10 AM 5/23/2005
At 09:47 AM 5/23/2005 -0700, you wrote:
Motorola made a voice sensitive squelch circuit for the HF Micom
2-way a number of years ago. In those days, was all separate
components - the diagram is available if you are interested.
---Yep they did! The one I built was patterned after the Micom
The reason these radios are now coming on the market is that the Federal law
on medical privacy (HIPPA) is requiring the encryption of any medical
information between the field units and the hospitals. Squads that transmit
patient info in the clear face severe penalties. Some of the squads have
I don't know what state you are in but, Florida is doing a big overhaul of
the Med Freg and getting ALL the health care people back on them. They have
switched them all to 12.5 freg's. with a plan on what PL tone they must
use. Just had on center install a Vertex VXR-7000 with a 2nd one on
HIPPA only deals with patient specific information examples are, SOC. SEC
number birth date, name, pts address, pts phone number etc. not their
medical information. you are still allowed to give your medical report over
the radio, an 85 y.o. female that is complaining of severe abdominal pain
Steve Helton wrote:
The reason these radios are now coming on the market is that the Federal law
on medical privacy (HIPPA) is requiring the encryption of any medical
information between the field units and the hospitals. Squads that transmit
patient info in the clear face severe penalties.
The Privacy issues is a real valid point, But here in the Chicago Metro area
Every Ambulance still use 155.340 in the Clear to relay personal info to the
Local Hospital while transporting the patient.
I Have a friend who a few yrs back did Convert one of the units to a Low
power Emergency 440
I am in SW Ohio and everyone here in my part of the country has abandoned
MEDCOM based on what I stated before. The hospitals in my area that the
squads communicate to are getting encrypted radios on the trunked system. I
just attended a radio training class for one of the newest digital trunked
At one time they did go to trucking here and now they are going back to the
Med freg's. I think it has to do with all the storms we have here in
Florida
and to move help into areas and to be able to talk.
I know when they did the trucking it just did not work.
- Original Message -
Hey Guys,
Well few of us played with the repeater today. We took the preamp
out of line and then did the desense test. We shut the transmitter
of, opened the squelch and listened to a weak station on input of the
repeater, when the transmitter was enabled I was the only one to
notice any
At 01:34 PM 5/23/05, you wrote:
Hey Guys,
Well few of us played with the repeater today. We took the preamp
out of line and then did the desense test. We shut the transmitter
of, opened the squelch and listened to a weak station on input of the
repeater, when the transmitter was enabled I
Alexander,
Not trying to be a smart A$$,
but why would you put a preamp in line and then an attenuator?
Kind of defeats the purpose of the preamp.
What make of preamp are you using and how much gain does it have? Might
want to try one with a lot less gain,
I think I saw a couple postings stating
What is the Best way to try and Eliminate Exciter Micro phonics, it is
a Hamtronics
T-301 220 Exciter, Enclosed in a Tight Aluminum case, If You touch the
case Etc and Even the little Ext Muffin fan Vib will generate Noise
heard on the transmit audio. Also this is the Exciter that I' am
trying
Not trying to be a smart A$$,
but why would you put a preamp in line and then an attenuator?
To prevent receiver overload.
If the noise level received by the antenna is sufficiently high (i.e. higher
than the natural thermal noise floor of the receiver/preamp), an attenuator
ahead of the
Alexander,
That is a good start. Now you have some more work to do
(sorry I didn't have a chance to comment before your trip
to the site!)
With the preamp OUT and repeater transmitter DISABLED, get
someone to give you a weak signal (something that is far
from full quieting). Now put
Jeff's excellent dissertation on adding attenuators ahead and behind
preamps has been added to the following page:
http://www.repeater-builder.com/rbtip/preamps.html
Kevin Custer
Not trying to be a smart A$$, but why would you put a preamp in line and then an attenuator?
Tom,
I may have
something in my old RCC setup notebook. I may have one of those things some ware
also. I will dig around and see what I can find.
Kevin King SCSA BSCIS
ARS KC6OVD
GMRS KAG0378
EIEIO 2722
Acworth Georgia
-Original Message-From:
Repeater-Builder@yahoogroups.com
Yep I even recall the Novice Class I had back in 1976 we were discussing the
KC's , MC's to Khz. and Mhz.
was on the exam probably.
Mark AB8RU
[EMAIL PROTECTED]
- Original Message -
From: Coy Hilton [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, May 22, 2005 12:18
Steve,
My first guess is that the IDer has a low-impedance output, and is
connected at a high-impedance point in the audio chain. Just try lifting
the IDer's audio lead, to see if the repeated audio level comes back up.
If so, you might be able to correct the problem by putting a high-value
Hey Don - I wish you good luck on this piece, and I feel that somewhere there
is a person that can help you.
I had a new one and had the exact same problem. Attempted to get Mr. Vogt to
repair it - it was new- He
suggested I cut a trace on the board and try it. - did that - No luck so he
says
Don,
You have it right; the correct term is microphonics. The IEEE Standard
Dictionary of Electrical and Electronics
Terms defines microphonics as The noise caused by mechanical shock or
vibration of elements in a system.
Tube-type amplifiers are extremely prone to microphonics, since they
A sledgehammer will correct it as well ;-) And the advantage is that you'll
never have to worry about tuning later on.
Chuck
WB2EDV
- Original Message -
From: Eric Lemmon [EMAIL PROTECTED]
To: Repeater-Builder@yahoogroups.com
Sent: Monday, May 23, 2005 9:30 PM
Subject: Re:
I prefer target practice,it prolongs the fun for a few more minutes.
Their receivers for 220 arent much better,the TCXO model makes a great
microphone but a lousy receiver...
Chuck Kelsey wrote:
A sledgehammer will correct it as well ;-) And the advantage is that you'll
never have to worry
I have a 440 repeater transmitting 442.850 and receiving on 447.850.
We are hearing interference on the repeater from 453.550 which we
confirmed on a scanner. This 453.550 frequency is not at the same
site as the repeater (it isn't extremely strong), however there are
many other transmitters
At 08:40 PM 5/23/2005, Chuck Kelsey wrote:
A sledgehammer will correct it as well ;-) And the advantage is that you'll
never have to worry about tuning later on.
Widlar optimization :)
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If that is the issue, it seems the easiest way would be to replace the
receiver with something that doesn't have a 10.7 MHz IF. Or, even with a
higher quality receiver.
Joe M.
dgrapach wrote:
I have a 440 repeater transmitting 442.850 and receiving on 447.850.
We are hearing interference on
Look for a copy of the August 1982 issue of 73 magazine which has an article
called Smart squelch. I couldn't find a copy of the article but I did find
it listed in an old Radio kit catalog in my file. I built two of the
radio kit versions years ago and they have served me well for monitoring
anyone have any info on decibel products duplexer model# tdd7200a-c
this is a six can pass reject device that was on the 155mhz area does
this need to have the loops changed or the jumpers between the cans
lengthened to be optimized for better isolation between rx/txthanks
Yahoo!
Howdy!
Anyone got a source for documentation for Motorola MRTI and MRTI 1000?
I've got 2 in service at work and no paperwork. They're both currently
running on G.E. MastrII's primarily in use for in house paging but the
bosses want to move them to Kenwood TKR840's.
Any help would be appreciated.
--- Mark A. Holman [EMAIL PROTECTED]
wrote:
Yep I even recall the Novice Class I had back in
1976 we were discussing the
KC's , MC's to Khz. and Mhz.
was on the exam probably.
Then the material was probably out of date. The CPS
to Hz was made in 1967. Almost 10 years before your
Novice
TDD7200A is a Motorola part number. This duplexer is an option rather than
a catalog item. Call Motorola Parts ID at 800-422-4210, and ask what this
number crosses to in the Decibel Products catalog. Once you have the DP
part number, contact DP Tech Support for assistance.
If you don't get
Humpf ... new-comer ...
Neil - WA6KLA
Mark A. Holman wrote:
Yep I even recall the Novice Class I had back in 1976 we were
discussing the KC's , MC's to Khz. and Mhz. was on the exam
probably.
Mark AB8RU
[EMAIL PROTECTED]
- Original Message -
From: Coy Hilton
It was nice to see everyone that stopped by and said howdy at the
Repeater Builder booth at Dayton this year. Many of folks who visited
thanked us for having the website and repeater-builder email list for
the benefit of the repeater builders abound; and for that, I say...
Thank-You!
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