Working on converting a Linear Modulation (Similar to ACSSB) 220
Trunking repeater to Amateur Radio applications, but I need your help.
I am seeking any documentation at all. A scan of a service manual,
schematic, notes from the teacher, anything.
The documentation needed is for the LMC3005
At 10:59 AM 01/30/10, you wrote:
Speaking of monitoring
Anyone have an easy way of converting a Positive Ground 48 to 72 volt
system to a Negative Ground 0-5V for monitoring?
Thanks
Chuck n0nhj
Are you looking to read the actual voltage, or just the presence /
absence of it?
Mike
Does your digi have a serial port? Can you send and receive data in and out?
Maybe this might work...
http://www.linuxtoys.org/dvm/dvm.html
or this...
http://www.viddata.com/dvm_hardware.htm
or this...
http://www.rs232pro.com/rs232/rs232_dvm_kit.htm
Mike WA6ILQ
At 02:42 PM 01/30/10, you
At 12:47 PM 01/30/10, you wrote:
Hi Mike,
We're using a Kenwood TKR-720. The price was
right (we had it on hand), it's relatively compact,
does what we need it to. Older technology, with
the front panel controller, etc. You know of a
way to reduce the current?Did remove the
+ from the
--- In Repeater-Builder@yahoogroups.com, Matt Harker kc5...@... wrote:
Hi everybody,
I am looking for any old RCA service manuals for the Series 700 and Series
1000 radios whose operating range was as follows:
25 - 30 MHz
30 - 36 MHz
36 - 42 MHz
42 - 50 MHz
Hello Matt
Be careful
If you made a simple voltage divider that would give you around 12VDc
from the 148VDC power plant you could use a circuit like this to watch
the voltage change:
http://dev.emcelettronica.com/howto-monitor-lead-acid-batteries-charge
The LM3914 would give you high/low outputs at the LED lights
This is what we used in literally hundreds of Nextel sites for
temperature alarms:
http://www.grainger.com/Grainger/items/1UHH2
This provides either an open or closed contact indication. I don't
remember them ever failing.
73, Joe, K1ike
rahwayflynn wrote:
Any suggestions on reliable
I think I have a new addictionAerotron.
It's s nice to see the parts and be able to actually read voltages
and make some sense out of what the mean.
Joe
skipp025 wrote:
There's a Series 700 mobile up on Ebay right now... I thought
about it but I'm trying to get back on my 12 Step
I also use these at DOD sites for hi and low temp alarms and intake and
exhaust fan triggers in the event that
the HVAC fails (or for fresh air) and the site monitor fails it then can
activate on its own. Out of all the sites we have none have failed as of
today.
Brent KF4TNP
From:
I would like to have an antenna analyzer. The most common with hams
seems to be the MFJ analyzers, but I am not a fan of MFJ. So, what do
you all use? I'd like the analyzer to cover HF through ham UHF. It
would be nice to have it tell me the sign of the reactance, but I
guess this can be easily
P200 H44RFU7160BN
P200 H44RFU7160BN
P110 P43QLC20E2AA
P110 P23QLC00A2AA
GE Mobile Comb# N3UU2N100ZA
2 S550 Control Heads, 2 Mic's, 2 Brackets
Best Offer Plus Shipping
I am also looking for a OEM Low Power Analog Spectra Programming Cable (Rib to
Radio).
No Batteries, antenna's or chargers
Centracom II Desktop and Manuals No CEB
Box of UHF MPI portables/parts
Standard GX3000 Mobile UHF
Make offer Plus Shipping
again prefer to deal locally but willing to ship.
also looking for OEM low power analog spectra rib to radio cable.
also still looking for a DB-404 or DB-408 for my
there are also a couple good MPI batteries and a couple of chargers in the
pile.
also add an aristo-craft micon RC Jr. Tx mint in original box.
again best offer or trades, plus shipping on any or all of this stuff.
I also have other electronics that are AM/FM broadcast Related, contact off
John,
I think you're setting your sights too high. There are excellent analyzers
for HF through low VHF, and excellent analyzers for VHF through UHF, but
very few that cover HF through UHF. I once tried the MFJ-269, but gave up
on it after the THIRD unit died. The first unit had a defective
I don't have the radio or manual with me at this time but I think you need
to program scan by going to F2 then select zones then select scan. I have
my Spectra set up for Zones so I can have a different scan for the Zone I
select.
Hope this helps.
David
From:
I took it apart and resoldered the joints around the output transistor.
It seemed to have helped the problem a little, but did not completely
fix the problem. There seemed to be a lot of solder on the final
transistor, more than what I would expect. I ended up just touching up
the solder
I have a radio that was donated to our group, and have not been able to
identify the radio, to acquire information on it. Any help would be
appreciated.
Info and pictures at the following link:
http://www.trailriding-texas.us/radio.html
Thank You,
Louis
That looks to be an UHF 2 channel Standard 25 watt mobile.
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of k1stx
Sent: Sunday, January 31, 2010 6:06 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] On the
Looks like a TAC-200 to me. Should have two channel capability and PL
encode/decode. If I remember correctly, the PL code is changed by
installation of the correct precision resistor. I'm not sure of the VHF
power, but the UHF version is 25 watts, often capable of 30 to 40.
Hope that
That makes good sense. According to a news release, the RCA Land Mobile
Radio division was acquired by TACTEL Systems, Inc., of Pittsburgh many
years ago.
73, Eric Lemmon WB6FLY
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On
They had a little green tuning tool that went with this radio. It was
really handy. I bought some from a RCA dealer who had NOS many years
ago. Wish I could find a half dozen more somewhere.
thp
Eric Lemmon wrote:
That makes good sense. According to a news release, the RCA Land Mobile
Optima Colors:
The Red Top are starting batteries, optimized for starting and not long
discharge.
The Blue Top are deep cycle (Marine/RV), optimized for deep discharge.
The Yellow Top are somewhere in-between.
Because radio applications are often high current draw, like starting, many
go with
Greetings everyone
Anyone out there have an interest on RCA Super
Carfone Base Station or Repeater components
UHF Recvrs
UHF Tx Deck
Power Supplies
Control Panels
Tone Panels
Cabinetry
etc.
This stuff belongs in a museum
Ed Folta K9QPJ
Thanks all!
From what I could find (i.e. not much) it matched the description of a TAC200,
but could never confirm.
Now to find a manual!
Thanks for the help!
Louis
--- In Repeater-Builder@yahoogroups.com, Tom Parker t...@... wrote:
They had a little green tuning tool that went with this
Nate,
A nearby hospital is required by law or regulation to replace on an annual
or biannual basis the SLA batteries in many items of equipment, and the
local radio clubs are the beneficiaries of this policy. Batteries in the 12
to 40 Ah range are found in portable X-ray, defibrillator,
Um...when I click the link it opens a page with photos and a caption which says:
--
RCA Corportation
Model MFA02-AC21B
FCC XMTR Data CT2020
FCC RCVR Data CR2003
2 channel crystal radio
VHF - currently crystal in the 159.xxx range
- Original Message -
From: Eric Lemmon wb6...@verizon.net
Nate,
A nearby hospital is required by law or regulation to replace on an annual
or biannual basis the SLA batteries in many items of equipment, and the
local radio clubs are the beneficiaries of this policy. Batteries in
I am not sure what the 467.750 written on the cover is about! The radio is
definitely VHF and crystalled 159.255 both TX and RX. Ment to put a note on
there to ignore the UHF markings! Sorry!
Louis
--- In Repeater-Builder@yahoogroups.com, Paul Plack pl...@... wrote:
Um...when I click the
It IS a RCA TAC 100 that were made in Japan for RCA.
TacTel Systems, some RCA LMR people, acquired the RCA Land Mobile radio Div.
including the RCA Service Co.'s mobile radio field service. TacTel went belly
up a few years later.
Fidelco continued for a few years after that with the service
I may still have some of these manuals if someone wants to put them on PDF. VHF
and UHF for sure..
The RCA 700 and 1000 series are RCA's third or fourth generation solid state
radios.
Matt Harker kc5...@... wrote:
Hi everybody,
I am looking for any old RCA service manuals for the Series
I have a Zetron Model 20RD message repeater. Don't have the book for it. I
got it to record and playback but that is the most testing I have done.
If you can find info on it, let me know if this will work for you.
--- In Repeater-Builder@yahoogroups.com, wa6vpl wa6...@... wrote:
Just in
The radio shown in the photo is called a RCA Tac 300, RCA's answer to a Maxar.
On UHF Models it used crystals same as a Motorola Maxar, and if equipped with
PL (separate board), the tone board used 2 precision resistors to select a tone
frequency. In UHF 25 watts, VHF was 30 watts, think they
The Tac 100 was a portable, RCA's answer to the MT500 MX350.
VHF Lo/Hi UHF. Early RCA portables were not called TAC 100 and were Rebco
units, the TAC 100 came out about 1979.
Early versions were 6 channels, later versions were 8 channels.
Watched them being built at plant in PA.
RCA Tac
Kris - if the radio doesn't support conventional SCAN with a v6.x MLM, I
don't know what one does. This is NOT an older radio.
Dave - well, I can see the following in the Zone Scan Options:
Talkback Scan. Enabled
Scan Button Control... Active
Coded Squelch Scan... Enabled
Hello,
Are you familiar with the TAC-310SX? I use several in mobile and base
applications. I really am impressed with the audio. I like the fact they use a
Com-Spec tone board, controlled by a 2716 EPROM.
For years, I have been asking if anyone had programming info for the frequency
EPROM
The Tac 310Sx was a short run radio, mfg in Japan, final assembly in PA. When
you got a good one they worked great, weak PA's were a problem.
Much smaller than the Tac 300 and programmable with scan.
As I recall we used a plain old 2716 prom reader/burner when our RCA factory
programmer bit the
Joe k1ike_m...@... wrote:
I think I have a new addictionAerotron.
It's s nice to see the parts and be able to
actually read voltages and make some sense out
of what the mean.
Joe
I worked for an Aerotron Shop and they are/were really cool
radios for the time and place. I
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