This might be of interest
http://www.repeater-builder.com/tech-info/temperature-compensation.html
Mike WA6ILQ
At 07:12 PM 12/13/07, you wrote:
Thanks for the information Scott. Since the only difference I see is
the two capacitors, I wonder what makes it more stable. Perhaps it is a
I want to thank all that helped guide me to Motorola TPN1105/TPN1106
schematics, back in July 2007.
Although, these above schematics are not the Motorola Micor power supply, that
I have. They are similar.
I have a Motorola Micor power supply, with the float/equilize slide switch for
Anybody bought a new db314 lately? Can't find it on some of the
online catalogs. Working on a grant.
Thanks,
Robert
KD4YDC
Hello,
Use the old light bulb test first to limit blown fuses. That is an
incandescent bulb in SERIES with the ac line IN. It will glow brightly if
the fuse is replaced and the short still exists. When cured it will glow
dimly. This limits further overload damage and its cheaper that a case of
At 12/13/2007 16:13, you wrote:
The power gate is a cute but expensive box... You should be able
to build the equivalent circuit in a less attractive box for under
$30 easy.
The problem with the PWRGate and all the answer/reply posts I've
seen so far is so far there no mention of a low battery
At 12/13/2007 13:01, you wrote:
By the way, if you have not noticed it yet, the RUS
signal on a GE system is a combination of the COS and
CTCSS signals, and works great as the COS input to
your controller. It shows a slight delay coming up
(while the CTCSS decoder locks up) but turns off
Re: power supply / battery system for repeater site
The question is... what are we trying to do with the end result?
Switch off a device after x-time of non use and/or protect a
battery bank from discharge?
Most newer Kenwood Radios I sell have non-use power off timers
built right into the
Re: KXN1018C versus KXN1019B Channel Element
Thanks for the information Scott. Since the only difference I
see is the two capacitors, I wonder what makes it more stable.
Perhaps it is a difference in the crystal itself.
Possibly the cut of the crystal but probably at least the
At 12/13/2007 09:48, you wrote:
Randy,
I've experienced problems similar to what you describe on several MII and
found it to be harmonic noise on the ptt (osc 10v) line. Installing
a 10 uh inductor where the line enters the exciter pcb did wonders for
mine. You may also want to install a
At 12/14/2007 07:50, you wrote:
At 12/13/2007 13:01, you wrote:
By the way, if you have not noticed it yet, the RUS
signal on a GE system is a combination of the COS and
CTCSS signals, and works great as the COS input to
your controller. It shows a slight delay coming up
(while the CTCSS
John,
I have/use a PA-II... and I bought the cables from them for each radio I
have. It is a little expensive, but that way I *know* it is going to work.
grin
FWIW, I had a problem with my PA-II RIB box and sent it back to Polaris -
they replaced it under warranty for FREE! And this is one
I think Mike hit the nail on the head and saved me some typing. The reason
why your two capacitors are different values than those shown is due to the
amount of capacitance needed to bring your particular crystal
'on-frequency'.
Scott
Scott Zimmerman
Amateur Radio Call N3XCC
612 Barnett Rd
You're welcome. The spurs I was referring to weren't from the PA either. They
were generated in the exciter. The PA just appeared to amplify them.
Moving the exciter output from the PA and into the service monitor, showed
the spurs. After installing the inductor where the ptt line enters the
Which radio and which chip - Xicor 2212 and 9346 are pretty simple.
Others are not as common. Steve NU5D
PS - 2212 is a parallel eeprom and 9346 is a serial eeprom. Neither has
links to burn. 2764s ? are different. steve
w4wsm wrote:
Just got a programmer to burn GE chips. I've tried it
Just putting out a feeler on this list in case anyone has one...
==
Looking for the following in working condition:
- An old Ritron or similar low end repeater
- 5-20W
- single PL encode/decode
- mobile duplexer
Ideally on one of the following
I haven't used a programmer from RF Guys but I have been down the same road
of misery of trying to figure out why a similar programmer wouldn't work.
These are built on perfboard correct?
You'll find pages on the web about how folks have handwired one of these
things up with a latch chip and
The following Repeater-Builder poll is now closed. Here are the
final results:
POLL QUESTION: Which do you prefer?
There is a current debate about the usefulness of a Push To Talk (PTT) Disable
switch on your repeater.
Would you rather have a switch or use some other means of disabling
Ben, I have a buddy in Deltona FL with exactly the
same problem. He tried his on several different
computers and had no luck at all.
He sent his RFGuys programmer to me, as I have one and
it works like a charm. His also worked like a charm
for me. So would probably do you no good to send it
My tower blew over in a recent storm. Am having trouble locating pricing for
the equivalent Stationmaster
antenna. Pointers appreciated.
73 de Jack - N7OO
Bob, I have four repeaters in service using a Zetron
38A controller, and had the following experience.
When I enabled the courtesy tone at the end of a
transmission a station that was on the edge and
'picket fencing' would be unreadable for all the beeps
the controller would insert. It seems the
At 01:30 PM 12/14/07, you wrote:
Just got a programmer to burn GE chips. I've tried it on 4 different
computers now and all kinds of printer port settings. It will act like
it is burning but when I verify it just shows errors. Put the chip
back into the radio and it hasn't changed...any ideas? The
Mike, the programmer I got from RFGuys is for the
X2212 EEPROM. They do make one for the chips for the
Motorola radios also, but the GE programmer is for the
X2212.
73 - Jim W5ZIT
--- Mike Morris WA6ILQ [EMAIL PROTECTED] wrote:
At 01:30 PM 12/14/07, you wrote:
Just got a programmer to burn
Jack
Take a look in
www.telewave.com
Telewave makes a very good Stationmaster equivalent and be sure to tell them
that it is going into a ham application--better price that way unless you
have a better yet commercial connection.
Scott, N6NXI
- Original Message -
From:
Jim,
I have a commercial system that still uses Micors with the TPN1105/TPN1106
(with an SP(special - that produced and alarm tone for the
operator/dispatcher)) that has been in service since 1975 or so and run on
batteries. The batteries used were 6-KCT270 batteries in series and the system
Does anyone else need filters for a winter project? The PA modules are
all gone now.
'JK
--- In various yahoo groups, w6jk wrote:
I have a supply of the TOKO 6DFB-915E-10 filters for MaxTrac 902 MHz
conversions. I'm offering them to members of the Group for $20 per pair.
I also have
At 12/14/2007 17:56, you wrote:
Bob, I have four repeaters in service using a Zetron
38A controller, and had the following experience.
When I enabled the courtesy tone at the end of a
transmission a station that was on the edge and
'picket fencing' would be unreadable for all the beeps
the
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