atms169 wrote:
> I don't have any test equipment that would work for the digital dstar
> so it's more of a trial and error thing.
There ought to be an analog mode...if there isn't, Icom made a HUGE fubar!
At this point if you need to use the amplifier your best bet is to just
reduce the output until the desense goes away and call it good.
tom
> [Original Message]
> From: atms169
> To:
> Date: 5/20/2009 10:52:37 PM
> Subject: [Repeater-Builder] Re: Desense on High Power Linear Re
internals to an analog state to do desense testing?
Milt
N3LTQ
- Original Message -
From: "atms169"
To:
Sent: Wednesday, May 20, 2009 11:28 PM
Subject: [Repeater-Builder] Re: Desense on High Power Linear Repeater?
>I have opened both repeaters. The VHF already had the
I have opened both repeaters. The VHF already had the blue hardline in it, the
UHF however I replaced with superflex.
I may try something different. Hardline up the tower and for a patch cord
(about 10 feet) up the mast I'll use superflex. I'll have to play around and
see what I have still.
I was originally leaning in that direction, purchasing 2 more cans and a new
phasing harness. I was told to stop what I was doing and rethink by other hams.
I think you are right. I will order the new cans and make another trip to San
Antonio to see Don.
Don, if your reading.. I'm a headin up
I am going to ask a question that might sound stupid but, based upon Icom's
ignorance, I need to ask.
Did you ever open the repeater case on the 2m repeater and replace the rg-58
patch cables that are zip tied to each other to connect the rf modules to the
rear of the case before adding your p
On Wed, 20 May 2009, Eric Lemmon wrote:
> I think we've found the cause of your desense: The TPRD-1454
> duplexer, which has four 5" cans, is rated at 77 dB isolation, and is
> marginal with 20 watts TX and RX sensitivity of 0.4 uV- which calls
> for at least 82 dB isolation. At 100 watts, 95
nesday, May 20, 2009 5:58 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: Desense on High Power Linear Repeater?
Sorry about that, the model number is TPRD-1454
Aaron
--- In Repeater-Builder@yahoogroups.com
<mailto:Repeater-Builder%40yahoogroups.com> , "
-buil...@yahoogroups.com] On Behalf Of atms169
Sent: Wednesday, May 20, 2009 9:52 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: Desense on High Power Linear Repeater?
Hey Don, yeah good to hear ya!
Well, the system is at my house. If I could find a tower (Trust me I have
Hey Don, yeah good to hear ya!
Well, the system is at my house. If I could find a tower (Trust me I have
looked around) then that would make the world of difference.
Its up on my tower about 60 feet (Both UHF and VHF). The VHF has pretty good
coverage. The UHF not so much, probably half of t
Aaron,
Howdy again neighbor! Don't start spreading rumors that its flat in Texas,
it's all downhill to the beach.on second thought it IS flat and the
water is bad
Are these the cavities I tuned for you last fall? If so guys these are
typical specs for 4 cans BPBR. Sorry but I couldn't
Yeah that is a good question. All we do is test from a portable a few miles
from the repeater. Low power settings on TX for the portable.
Test with the amp inline and the amp out of the equation. I find very quickly
there is something wrong.
That's all I can do, I can't vary the output power
by
> Sent: Wednesday, May 20, 2009 9:03 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: Re: [Repeater-Builder] Re: Desense on High Power Linear Repeater?
>
> On Thu, 21 May 2009, atms169 wrote:
> > Yes, 80 dB on the duplexers, 100 watts in, that's 10 dB and the p
On Thu, 21 May 2009, atms169 wrote:
> Yes, 80 dB on the duplexers, 100 watts in, that's 10 dB and the preamp
> 18 dB, so I'm losing 8 dB ??
Assuming you're not experiencing front-end overload because of your
pre-amp.
> The sensitivity I believe is 0.4 uV Dstar system.
>
> I live in Texas w
Sorry about that, the model number is TPRD-1454
Aaron
--- In Repeater-Builder@yahoogroups.com, "Eric Lemmon" wrote:
>
> Aaron,
>
> You left out the crucial information: What model Telewave duplexer?
>
> 73, Eric Lemmon WB6FLY
>
ssage -
From: Repeater-Builder@yahoogroups.com
To: Repeater-Builder@yahoogroups.com
Sent: Wed May 20 19:33:36 2009
Subject: RE: [Repeater-Builder] Re: Desense on High Power Linear Repeater?
Aaron,
You left out the crucial information: What model Telewave duplexer?
73, Eric Lemmon W
@yahoogroups.com
Subject: [Repeater-Builder] Re: Desense on High Power Linear Repeater?
Yes, 80 dB on the duplexers, 100 watts in, that's 10 dB and the preamp 18
dB, so I'm losing 8 dB ??
The sensitivity I believe is 0.4 uV Dstar system.
I live in Texas where it's flat. I'm adj
Yes, 80 dB on the duplexers, 100 watts in, that's 10 dB and the preamp 18 dB,
so I'm losing 8 dB ??
The sensitivity I believe is 0.4 uV Dstar system.
I live in Texas where it's flat. I'm adjusting my station to compensate for
the height value. More power good receive. There is a 1000 foot
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