My statement regarding "tuning" did not explicitly refer to the actual
tuning of the duplexer, but to the matching of the TX and duplexer in
combination. This can be proven if two Birds are used, one between the TX
and the duplexer input and the other between the duplexer output and the
antenna.
> When you put the Bird between the TX and the duplexer, you
> have changed the
> length of the jumper cable, which upset the tuning.
Adding a wattmeter or any other length of cable between the transmitter and
the duplexer Tx input port has no effect on the tuning of the duplexer. It
may chang
--- Eric Lemmon <[EMAIL PROTECTED]> wrote:
> Bernie,
>
> When you put the Bird between the TX and the
> duplexer, you have changed the
> length of the jumper cable, which upset the tuning.
> But, really, you need
> not worry about what the SWR is, if the forward
> power to the antenna is
> appr
Bernie,
When you put the Bird between the TX and the duplexer, you have changed the
length of the jumper cable, which upset the tuning. But, really, you need
not worry about what the SWR is, if the forward power to the antenna is
appropriate.
Let's say you have a 4-can duplexer, which might have
Bernie,
A typical VSWR for a duplexer would be 1.5:1 or less, more like less. Will not
be 1:1 most times, but low. A lot lower than your 65/25W which is more like a
4.5:1 VSWR.
Really sounds as the duplexer is out of tune or has an internal problem.
Wonder if you tuned these from another ban
>From the Dup. to the Ant. is ok. But the Dup. is out of tune or no good. Might
>even be a bad jumper on the Dup.
dallasreact112 <[EMAIL PROTECTED]> wrote: Anyone one know what to expect SWR
wise with a duplexer?
I have a DB products 2 meter duplexer on an amateur repeater.
Measuring with a Bi
If the duplexer is correctly tuned, there will be NO measurable SWR into it. If
you have 25/60 watts, it is way off frequency.
- Original Message -
From: dallasreact112
To: Repeater-Builder@yahoogroups.com
Sent: Friday, August 24, 2007 7:16 PM
Subject: [Repeater-Builder] Dupl
Generally the duplexer only makes a slight contribution to the reflected
power. How doe the reflected power between the transmitter and antenna,
without the duplexer in line look? Steve NU5D
dallasreact112 wrote:
> Anyone one know what to expect SWR wise with a duplexer?
> I have a DB products
Anyone one know what to expect SWR wise with a duplexer?
I have a DB products 2 meter duplexer on an amateur repeater.
Measuring with a Bird wattmeter between the duplexer and antenna I
read 50W forward and a couple watts reverse. That is ok. But when I
check between the transmitter and the TX port
Comm Spec sells a programmable CW ID for about $60.
However, what is the PROM...part number. I might have a programmer for it.
Might even have the PROM.
73, ron, n9ee/r
>From: skipp025 <[EMAIL PROTECTED]>
>Date: 2007/08/24 Fri PM 12:53:33 CDT
>To: Repeater-Builder@yahoogroups.com
>Subject:
At 10:53 AM 8/24/2007, you wrote:
>You can find/ask someone with a bipolar prom burner to make a new
>chip for you.
<---I had a bipolar prom burner but it committed suicide a few years
back. Its therapist said had I only paid attention to its cries out
for help, this tragedy might have been av
Spectrum Repeater CW ID'er Bipolar Prom
> If the IDer has a PROM then little can and should be done
> to go another way...a new PROM.
Spectrum sells a replacement prom from about $55, which is kind
of out of line for a price... but at least it's available.
You can find/ask someone with a bipo
> The MSR2000 has a terrible carrier squelch. I strongly suggest
> anyone running a MSR2000 to integrate a Link-Comm RLC-MOT (Micor)
> squelch board.
Nothing wrong with the MSR-2000 repeater in carrier squelch. I've
found most people don't clearly understand how to connect, configure
and adju
Easier to buy the entire pa from an Ebay Auction.
If you have some time, a pot of coffee and the XM-150 playing low
inthe background you can trouble shoot the power control board
easy enough. Not a lot of fun... but it can be done...
cheers,
skipp
> "Pete Theo" <[EMAIL PROTECTED]> wrote:
Anyone have any spare SEA ESP504 or ESP520 radios avalible cheap? I
would also like the ESP700 later down the road.
I agree with Ron, an attenuator will present the correct load to the
exciter.
Kevin
Ron Wright wrote:
> It might work, but for how long. Also detuning the cavity might upset the
> loading making the exciter unhappy. This can cause many RF problems
> including spurious generation.
>
> I woul
Hi Tim,
Looking at our S-7R manual about the optional CWID, it is factory programmed.
We use the id from our controller as the id source.
Russ AE6UX
wd4chs <[EMAIL PROTECTED]> wrote: I am in need
of or someone who knows anything about the CWID for a
Spectrum SCR
Hi everyone.
Anyone knows something about programming Direct Mode Freq in the
Motorola MTP 700 TETRA radio? Does anyone have the RSS?
Thanks.
Hi.
Need all the help and info i can get about this repeater. PIN-
connection on the back specifick.
Thanks.
It might work, but for how long. Also detuning the cavity might upset the
loading making the exciter unhappy. This can cause many RF problems including
spurious generation.
I would consider building a 16 db antenuator.
73, ron, n9ee/r
>From: Jesse Lloyd <[EMAIL PROTECTED]>
>Date: 2007/08/2
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