. At 100 watts, that simply isn't enough to prevent desense. You
need more isolation
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com
At 04:38 PM 9/8/2010, Andrew Seybold wrote:
What repeater are you running? Is it a GE Mastr II by chance?
---You hinting at the issue of Mastr II amp going spurious when the
power is turned down too far?
Ken
of time as that is not the problem. Your
duplexer simply cannot provide enough isolation for the power level
you're trying to run.
More grounding and replacing coax with hardline (unless your coax
isn't doubleshield to start with) will buy you nothing.
Ken
running something along the lines of RG-8
but I did think to qualify that.
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized
At 12:36 PM 9/3/2010, wd8chl wrote:
On 9/3/2010 3:07 PM, terry dalpoas wrote:
It also has the means to upload sound files (well, they need to be
converted), so it can say
about anything you want it to.
---So does the 210 g
Ken
?
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood and Telewave and
we offer complete repeater packages!
AH6LE/R
At 01:47 PM 8/28/2010, Juan Tellez wrote:
For simplex use, you have to have an external antenna relay.
-Yup. You need an external relay. Checkout RF Parts as they have
fairly reasonably priced ones
Ken
The subject says it all but I'm looking for a source for stainless
speednuts and screws such as the ones that came with CompaStation
racks. (looking for around 50 sets)
The usual sources (like HomeDepot and various hardware chains) only
have the crappy ferrous spring steel types.
Ken
they're made from
10 gauge stainless and are much beefier.
Have a look (obviously the stainless one is on the right):
http://www.arcomcontrollers.com/clips.jpg
Ken
--
President and CTO - Arcom Communications
Makers
.
---Thanks for the input Steve. The one I was looking at is
supposedly a new demo and the guy wants $975 for it
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http
and OF COURSE, what's a
fair price for the above?
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood and Telewave and
we
At 10:20 AM 8/9/2010, skipp025 wrote:
3. Repeater Pre-selector Alignment. How did the Dealer
align the receiver front end? Most people use the
peak for max signal method and that's not the best.
I can't answer the rest but this I can.
We used the SINAD method
Ken
Speaking of power sensors, I have one of each of the following.
DB Products DB8885A-350. 100-325 mHz 350 watts
Telewave PM-2AQ-300 - 100-300 mHz 5 - 1000 watts
I would like to trade ONE OF THEM for one covering 400 - 500 (UHF ham
band of course).
Ken
Alright
Everyone get it out of your system
http://www.imdb.com/title/tt0080339/quotes
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
all the time on TKR-750's that
we sell. They work very well without overloading the front end as
many of the higher gain ones on the market do (generally, 12 to 15 dB
is all that is needed in a receiver system, not the 20 to 24 dB some
preamps deliver.
Ken
At 10:30 AM 7/29/2010, Doug Hutchison wrote:
Where does one obtain these and at what cost?
http://www.anglelinear.com
Chip Angle is arguably one of the top 10 RF guys in the world
Ken
--
President and CTO - Arcom
/99 to 146.745/145. I was WA6EMV in those days (ew, that was YOU?)
BTW, someone recently sent me some TRW ARC newsletters from the 70s
(when I was a member) with an article I wrote for a VHF power amp. I
have it PDF if anyone is interested for whatever reason.
Memories...
Ken
Wow Mike, you are da man!
(that and you have WY too much time on your hands! g)
To have the kind of detail at your fingertips is, well.. downright scary!
Ah, the SoCal days of the 34/94 wars, wars with DR0NK and so on.
Ken
At 10:18 AM 7/28/2010, Mike Morris wrote:
At 06:51 AM 07
And for your SoCal types..
I remember seeing Dick McKay walking around the Sahara in Vegas,
talking into a Motorola mic (with just the coil cord hanging down)
and listening on '94.
This was during SAROC in the 70's
Ken
of the above and they are great for inverters, buffers,
little op amps for increasing the level of the disc or tx audio.
Any ideas?
---Radio Shack has 'em
Ken
--
President and CTO - Arcom Communications
Makers of repeater
Oh, this is not going to end well :-)
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood and Telewave and
we
to be a bit more specific.
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood and Telewave and
we offer complete
for external controllers and I've always
simply used a simple NPN small signal transistor (2N or 2N3904)
as a buffer. Of course this inverts the COS signal (which is just
fine with me as I've never liked active low COS signals).
1 transistor and 2 resistors is all it takes
Ken
PIECE UNIT UHF AMP. #IT COMES WITH THE
AMP HEAD, AND POWER SUPPLY, 19 RACK MOUNT, IT WAS USED AS A LINK
AMP. #100% OPERATIONAL. 10 IN 80 OUT MODEL # C70D10R (D/C POWER
SUPPLY INCLUDED)
HTH
Ken
--
President and CTO
...@sbcglobal.net.
---I have a couple of 2Cs xtaled up for 441.900T/446.900 . Make me
an offer offlist
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com
We look forward to meeting you good folks at the 2010 SEA-PAC Ham
Convention this coming weekend in beautiful Seaside, Oregon!
As always, we'll have our booth there so stop by and say hi!
http://seapac.org/
Ken
TO THE COMBINING NETWORK. If
they don't, you cannot combine them
Of course this presumes each radio can supply enough level. If not
you'll need something like a summing amp (using an op amp is the
easiest way to implement this).
The RAD expects 1 volt p-to-p max do don't overdrive it.
Ken
is the TK-8180
I will write to you offlist
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood and Telewave
as a CTCSS decoder as they cannot possibly maintain the frequency
stability (nor have the narrow bandwidth) required for that use.
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories
. Of course I use
one of our controllers however :-)
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood and Telewave
At 02:16 PM 5/3/2010, Don Kupferschmidt wrote:
shameless plug, right Ken?
---Who, me? g
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com
the responsible member of the community that I am, I
would only sell such programmed radios to authorized personnel only.
We never had another bit of complaints from the PD although the MSS
didn't like us one bit (too bad - I made a career out of tweaking the Big M).
My how times have changed
Ken
to the task and could
very well fail.
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood and Telewave and
we
At 11:47 AM 4/26/2010, Paul Plack wrote:
Ken,
Correct, of course, but I'm assuming that in a 30w PA, smaller
components not somehow directly sunk to the main chassis heatsink
will reach their max operating temps in a very few seconds of
key-down, and therefore have to be spec'd the same
ones, medium height, and
5-foot tall ones. And one - 40 tall GE MASTR II Cabinet. All of
the Motorola cabinets are the deep ones that would hold repeaters
with duplexers, etc. IF they don't sell locally, they're off to the
metal scrapper.
---Let me know Larry. I'm looking for some..
Ken
is
bypassed. If your external controller can't do that then you need to
refigure what you're doing
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http
and you let an
external controller do its thing.
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood and Telewave
At 08:41 PM 4/19/2010, DCFluX wrote:
I do not believe there is a factory pre-amp made for this unit. I
believe factory spec is 0.35uV for 12dB SINAD.
If you decide a pre-amp is needed I'd stay away from the super high
gain GaAs FET type. I'd go with something in the 6 - 12dB gain range
* that its an 800 band contraption.
---Looks like a circulator (isolator) to me. No model # on the
label (and no way to tell from the pic what its freq is)?
Ken
--
President and CTO - Arcom Communications
Makers
---Looks like a circulator (isolator) to me. No model # on the
label (and no way to tell from the pic what its freq is)?
I should have said a dual stage circulator...
Ken
--
President and CTO - Arcom
CXB is sold.
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood and Telewave and
we offer complete repeater
corner of the rack is cracked but only just.
If interested, please make offer offlist. And please, no so what are
you asking for it? questions. MAKE AN OFFER!
Ken
--
President and CTO - Arcom Communications
Makers
I have one I'm retuning and it's acting hinky on the notch tuning.
Guess I need their instructions
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http
it going now (thanks for the manual Eric)- 100+ dB of
isolation and everything.Weird though - I couldn't get it to tune
correctly using an SA/TG
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers
thinking cable length between the T and the cavity is kinda
irrelevant in this case. Sound about right?
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http
Thanks for the replies folks - some good ideas.
I should have clarified that the spare T-1500 cavities I have are BP
only. And my plan is to use it as a suck-out (notch) filter. That is
why I was talking about using a T in line with the receive line.
Ken
At 09:28 AM 4/1/2010, KT9AC wrote:
I have a 40W UHF test machine running with two narrowband GM300's and a
1507 with no desense. Wondering what link radios your looking at (can
reply privately if you want).
---Believe it or not it's a MastrII Exec
Ken
to admit a certain bias against
General RT holders and even the new codeless ham guys. I've seen many
General RT holders who couldn't tune a broadcast radio to a local
station let alone work on a genuine 2-way radio.
So sue me.. I'm only human :-)
Ken
!
As an alternative, why don't you get a small, wooden garden shed and
use that? I've done that at several sites and it works wonderfully
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories
At 10:10 AM 3/27/2010, Chuck Kelsey wrote:
Or a vinyl one from Sam's Club
---Not as secure but that is still better than an outdoor cabinet.
Especially when you need to work on things and the weather is less
than..nice
Ken
safety uses and our customers just love 'em.
VERY well performing, VERY reliable and very reasonably priced. You
can't go wrong.
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers
At 09:40 PM 3/13/2010, skipp025 wrote:
Now who in their right mind would have that kind of stuff Ken?
---You kidding? One of the most reliable, best performing repeaters
I run is a Quintron UHF one I bought new, in the crate, in the
mid-80's. And it's still going strong!
Ken
I'm looking for an Aerotron VHF MPAC receiver (believe it or not!)
and a complete service manual (schematics, blah blah) for a Quintron
QT-6500 series VHF Xmtr.
Ken
--
President and CTO - Arcom Communications
Makers
of the supplied power supplies is
needed. For higher power, both are).
Before I put it on Ebay, thought I'd offer it up here. First $225
takes it PLUS shipping (the amp and supplies are around 50 pounds).
Ken
--
President
board (there are 4 discrete boards with one
device on each with a hybrid network feeding the input and taking
power from the outputs). Readjusted the trimmers for max out with
balanced current draw between the boards.
I assume the VHF is similar
Ken
Amp has been spoken for.
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood and Telewave and
we offer complete
At 09:23 AM 2/13/2010, i recycle computers wrote:
I would not to see one that was built by some toothless piece of
trailer trash so he can
splatter his alcohol driven filth up and down the band with some unfiltered
over driven linear.
Simply wow
about 40-45a when they're all fired up.
Anyone have any suggestions?
---Pretty common in aircraft but a quick Google search of 24 to 12
volt converters turns up all sorts of hits (and many with the
current range you're looking for).
Ken
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood and Telewave and
we offer complete repeater packages!
AH6LE/R
an
external amp if you need more power.
Here's a link to the brochure about them
http://www.arcomcontrollers.com/ftp/pub/manuals/tkr-750_850.pdf
Ken inline: 3381c4a.gif
--
President and CTO - Arcom Communications
Makers
At 01:38 PM 1/11/2010, skipp025 wrote:
If the meter's radio data transceiver operates on
electricity, which may be missing/out... how does the
dead radio notify the mother ship once the supply goes
away?
You'll be able to tell because that phantom signal you hear on
your repeater input or
At 02:51 PM 1/10/2010, kc8gpd wrote:
And the Agent told me they can easily track energy
consumption with time of day.
i have always had a problem with this. it eventually leads prices
based on the time of day you use energy.
as if they don't gouge you enough already they want more for usage
was. Personally I liked the guy but Chip Angle he wasn't g
Anyway, I've used TPL products over the years (since his leaving the
company) and have never had any more issues with them than any other
amplifier, be it Henry, Mirage or whatever.
YMMV of course
Ken
(VHF)
watts with no ill effects. Sure, they're not 24/7 keydown but since
the redesigned PA, we simply don't see failures. And while we can't
officially recommend it, we've never seen a problem from doing so.
Ken
antenna and 1 for the marine VHF. Never looked back :-)
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood
At 05:56 PM 11/23/2009, Captainlance wrote:
RN3 is the crystal type, all the 4 pin ovens are the same.
-Sounds like someone is resurrecting a Motrac?
--
President and CTO - Arcom Communications
Makers of repeater
=322id_categories=115
More Andrew info
http://www.hol4g.com/webpdf/DBB_CAT29-PG318-319_01.PDF
Info on modifying a DB201 and DB212 for 10 and 6 meters
http://www.xanaduu.com/db201/
Ken WA6OSB
was thinking of trying to extend the
elements for 6 meters. Has anyone done this on a DB225?
Ken WA6OSB
Bah...
My first repeater was built from a PRE Prog xmtr and a Motorola
Sensicon receiver (complete with pipes!)
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http
At 09:54 PM 11/14/2009, larryjspamme...@teleport.com wrote:
The Red Book was most helpful with the tuneup and crystal ordering info.
--I still have mine :-)
Ken
--
President and CTO - Arcom Communications
Makers
?
They won't filter the tone off the receiver audio at all.
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood and Telewave
FS: Quintron 100 watt Power Monitoring Panel. Comes with DB Products
DB8885A-350 coupler (100 - 325 mHz). In perfect working condition
Pics available - contact me offlist
Ken
--
President and CTO - Arcom Communications
of your
aprs transmitter.
I am a firm believer that anyone who deploys ANY transmitter on
a mountaintop (or any multi transmitter site) should be shot.
But that's me :-)
Ken
--
President and CTO - Arcom
A CIRCULATOR should be shot.
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood and Telewave and
we offer complete
to not see 'em :-)
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood and Telewave and
we offer complete repeater
doesn't need to be powered in order
to create intermod products. He'd be better of disconnecting the
antenna from the APRS radio
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories
dB). 81 may be spec but the ones I have certainly exceed that!
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood
tunability.
--Actually there are 4 trimmers (as my original post eluded to).
Being a 2 stage isolator (4 ports total), there are two pass ones
and 2 reject ones.
Still a ton of insertion loss regardless on the ham band
Ken
I don't recognize the logo.
http://www.ah6le.net/circulator.jpg
Obviously it's a 2 stage one and the label says it's a Model CD-460S
with tuned-to freq. of 462.975 mHz.
I'm after some spec's on the thing.
Ken
dB insertion loss when
properly tuned (in the ham band of course).
Damn nice unit..too bad
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood and Telewave and
we offer complete repeater packages!
AH6LE/R
. And
in SoCal, it even had the right direction split!
Only problem were germanium power transistors that did tend to get eaten a lot.
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories
At 02:45 PM 8/16/2009, Tony L. wrote:
Has anyone used Angle Linear's custom preamp/filter repeater unit?
I'm interested in learning whether real world performance matches
what is said on paper by the vendor.
---AngleLinear is top notch stuff. I will only use their stuff in MY systems.
)
ftp://ftp.arcomcontrollers.com/pub
Follow your directory path from there
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers
Please repost. As you see, it came through as garbaaage
Ken
At 01:55 PM 7/24/2009, wa6vpl wrote:
Reminder about TRW Swap Meet tomorrow morning, 25 July
(The Micor stuff is sold. All that remains is
one PA, TLD1693, 150-160 MHz range, 100 watts continuous duty.)
The following
I was wondering the same... are you thinking a bad duplexers? or maybe re-tuning? "K5IN" k...@comcast.net 7/10/2009 10:13 AM
Sounds like a temperature related issue. You might recheck the duplexers and even knock on their housing while testing.
I am no expert but am only throwing out
, there is the little matter of programming the EEPROMS in
'em but there are folks who can do it for you. And they will tune
down into the ham band very easily
Ken
--
President and CTO - Arcom Communications
Makers
being loaded and locked right now ...
Everyone had to start at the beginning too :-)
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com
I have Quintrons (QT-6700) and they work just fine - I've had them as
low as 441 with no problem.
Also, been running one rated at 90 watts pretty much 24/7 since 1984.
Great stuff
Ken
At 04:30 PM 6/14/2009, Adam Feuer wrote:
Ok, I don't use that model myself. I only have QT's in service
445 if it is a midsplit one to begin with.
Worst case, you may have to move of the caps on the stripline a bit.
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http
Just a note..
Last I heard, Comprod stuff is actually Cushcraft stuff
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers
As I said, last I heard :-)
That being said, I am not knocking Cushcraft - I've used their
antennas in everything from repeater service to EME use and never had
an real complaints (I especially liked their 4 dipole arrays for
repeater service).
Ken
At 09:42 AM 6/2/2009, Jeff DePolo wrote
://shop.corvettecentral.com/C1-1953-1962/Chassis-Wiring-Lamps/Corvette-Garage-12-Volt-p6185434.html
Ken
At 01:31 PM 5/22/2009, Mike Morris WA6ILQ wrote:
Got a friend who is laid up with back problems.
His car has been sitting for several months between uses.
He has already lost one battery from
, it does have a ham rig in it LOL)
Ken
about the various metered stages.
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood and Telewave and
we offer
than bare copper.
BTW, the reason for silver plating is not only for reduced surface
conductance when the copper is new and clean. It's for when things
start to oxidize as cuprous oxide is not so good a conductor whereas
silver oxide is much better.
Ken
. They tune down no problems at all.
Ken
--
President and CTO - Arcom Communications
Makers of repeater controllers and accessories.
http://www.arcomcontrollers.com/
Authorized Dealers for Kenwood and Telewave and
we offer
At 02:55 PM 4/16/2009, Adam Feuer wrote:
Ken,
How about the TKR-840? Any idea if that one will go down via the
software and tune without issues as well?
---So will the 850 - the standard KPG-91D software will program it
and it tunes down to the ham band very easily. I have personally had
too LOL!)
Ken
voltage on the Test
Point by tuning the capacitor. The voltage is well below what it should be.
---Must not be a K2 version. Is it a K?
But no, it does not need to be connected to a PC in order to align it
Ken
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