I'm still looking for an answer to the original post, but I tuned it up
as-is and ended up with the following result (5 MHz split):
insertion loss = 0.5 dB (RX and TX)
RX isolation @ TX freq = 93 dB
TX noise suppression @ RX freq = 55 dB
Something doesn't seem right about that 55 dB figure,
Are you set up not to receive emails from the Repeater-Builder group? In
other words, do you go to the web to view all the messages? If you get
emails, you need only reply using your regular email program.
You can send an email to the group at Repeater-Builder@yahoogroups.com if
you are set up
Thanks for the info. Somewhere else I read that from the mount to the outer
edge the length should be 51 inches, this will be about the same as 52.5 inches
from center to outer edge.
But to build one from scratch I need more info, radius of the loop, diameter of
the tube, coupling etc. Of
Kevin
Thanks for the repleis. In referance to the channel element, is there a way
to sweep the element by it self, or is that something that ICM or someone like
that would have to do? You've hit on something I hadn't thought about. If this
could be done by it's self it would be better than
If you're building a Low-Band Loop Antenna from scratch...
forget the DB-212 and copy the Sinclair Version. The
Sinclair Low-Band loop has a lot wider band-width and it's
pretty much the same design... if properly done easier to
construct hardware wise.
s.
cruizzer77 atlant...@... wrote:
FYI - Sinclair got the extra bandwidth by stager tuning the antenna element
from the 1/4-wave matching transformer that is inside the element. The
trade-off was a decrease in return loss (higher VSWR).
Chuck
WB2EDV
- Original Message -
From: skipp025 skipp...@yahoo.com
To:
Chuck Kelsey wb2...@... wrote:
FYI - Sinclair got the extra bandwidth by stager tuning
the antenna element from the 1/4-wave matching transformer
that is inside the element. The trade-off was a decrease
in return loss (higher VSWR).
Chuck
WB2EDV
Maybe... maybe not. I swept one just a
Has anyone got the dimensions of these for a 4 cavity for 450 ish, they are
the ones with 2 BNC sockets and a capacitor...Thanks
Andy
G8VLL
I've seen some return loss figures in the 30-40 dB range on the Decibel
antenna. However, sweep one and report back.
Chuck
WB2EDV
- Original Message -
From: skipp025 skipp...@yahoo.com
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, November 15, 2009 10:57 AM
Subject:
At 11/15/2009 01:26, you wrote:
I'm still looking for an answer to the original post, but I tuned it up
as-is and ended up with the following result (5 MHz split):
insertion loss = 0.5 dB (RX and TX)
RX isolation @ TX freq = 93 dB
TX noise suppression @ RX freq = 55 dB
Something doesn't seem
On Sat, 14 Nov 2009, JOHN MACKEY wrote:
No, I do not have to pay the electric bill.
I only have to replace tubes about every 5-8 years.
It would be easy to build a step-start for the tube cathode and tie that
into the COS/PTT line.
You could keep the tube filament warm with 1V or so and
The low-band loop from Sinclair (SRL 110) was not nearly as wide band as
the Hi band (SRL210) and UHF models (SRL310). The latter were designed
to be mounted either half wave or quarter wave from the tower or mast.
In the case of the low band loop a half wave would have put the loop 10
ft
I was hoping that Burt would chime in.
Chuck
WB2EDV
- Original Message -
From: Burt Lang b...@gorum.ca
To: Repeater-Builder@yahoogroups.com
Sent: Sunday, November 15, 2009 11:57 AM
Subject: Re: [Repeater-Builder] Re: Building Low Band Loop Antennas (DB-212)
The low-band loop from
Hi guys .I found the password 317537.It was in the smp4000 programming
manual
Thank You,
Ian Wells,
Kerinvale Comaudio,
361 Camboon Road.Biloela.4715
Ph 0749922449 or 0409159932 or 0749922574
www.kerinvalecomaudio.com.au
Hi Folks,
I'm looking for some power connectors for the above types
of radios.
I don't need much more than pigtails, as I am doing a special
cabling project.
I've looked at both Mouser Digikey, but they don't seem to
carry anything similar. I have seen 'generic' types before...
somewhere!
Find a local trailer supply store, those pigtails are very common wiring
plugs for trailers.
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of tahrens301
Sent: Sunday, November 15, 2009 4:49 PM
To: Repeater-Builder@yahoogroups.com
Subject:
mzfb2001 wrote:
Kevin
Thanks for the repleis. In referance to the channel element, is there a way
to sweep the element by it self, or is that something that ICM or someone
like that would have to do?
You can inject audio from a audio generator directly into the modulation
pin of the
Tim,
Or if you can find a Radio Shack that carries anything other than cell
phones, you may find them there as well. That's' where I got my last few
sets.
Mark - N9WYS
From: Repeater-Builder@yahoogroups.com On Behalf Of Steve Gebhard
Find a local trailer supply store, those
Has anyone got the dimensions of these for a 4 cavity for
450 ish, they are the ones with 2 BNC sockets and a capacitor...Thanks
Andy
G8VLL
I'll take one apart if nobody else responds. I have both the ham band
28-66-02 duplexers (100 dB isolation, 0.6 dB loss, 5 MHz split) and also the
I have dimensional data for both Decibel and Celwave lowband folded dipoles
*somewhere*. If there's interest I'll hunt for them.
I think the Celwave design (with the stingers) would be easier to
fabricate - no bending involved.
--- Jeff WN3A
-Original
I am looking for Jody, n7ert. Any one
has his email address? Thank you.
Rod kc7vqr
Thank you Larry.
Rod kc7vqr
I have a CXB UHF repeater and can't get the receive VCO to lock properly. I get
a peak of about 23 uA but it doesn't lock there. If I tune to where it will
lock, the M5 reading is about 13 uA. I've taken the VCO apart twice and cleaned
it.
Is substituting the transmit VCO (which does lock at
What's it worth: Model 526-509 6 can UHF duplexer tuned for 441.950 transmit
and 446.950 receive.
Brian, k5in
Tower calls them 2 pin dc disconnects.they are virtually impossible to get
in 12 guage wire, but tower has the 10 and 14 guage wire with the 2 pin trailer
plug. An auto parts store has them, but those are usually 16 guage wire and
not suitable for heavy current loads.
Sent on the Sprint®
Try tower. www.pl259.com
Sent on the Sprint® Now Network from my BlackBerry®
-Original Message-
From: tahrens301 tahr...@swtexas.net
Date: Mon, 16 Nov 2009 00:48:54
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Power Connectors - spectras/GM/Maxtrac/...
Hi Folks,
Just checking to see if anyone might have a copy of the programming software
for the old Standard GX-3000 series of radios. I can get my hands on a E-prom
burner and even a old computer to run the software on but need the software
first. Otherwise I will just use the mfor door stops.
Thanks,
Try this link for SAE CONNECTORS, 12 gauge and various lengths.
http://www.solarseller.com/low_voltage_dc_pumps__lvm__teel__accessories__plu
gs_and_extensions.htm
_
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of
Do you have the programmer interface? The GX3000 was programmed by programming
a ROM segment resident on the 8749 (if I remember correctly) microprocessor.
You remove the uProc. (socketed) and plug it into either the standalone
programmer or an interface box connected to a PC with the
actualy there is a good idea, never saw that myself, i to am looking for
some Backup software if anyone has for Programming the Tait T800 series
RAR or Zip'd either, please just don't PW it
Marcus
w9nwn wrote:
Just checking to see if anyone might have a copy of the programming
software
Can anyone offer assistance with making a programming cable for the tait 700
series please ?
Tnx
B
_
Looking to move this spring? With all the lastest places, searching has never
been
Doug + Marcus you have email
To: Repeater-Builder@yahoogroups.com
From: arkwrights-st...@xtra.co.nz
Date: Mon, 16 Nov 2009 19:19:33 +1300
Subject: Re: [Repeater-Builder] Programming Software for Standard GX3000 radios
actualy there is a
I don't think anyone was debating the 145-147 MHz allocation. I made the
point that the sub-band repeater segment didn't come along until after
those rules were abolished. I think repeaters were illegal in the
sub-band at the time, and the inputs would have been out of their band
if the
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