Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-25 Thread DCFluX
d the joint. On Wed, Aug 25, 2010 at 2:17 PM, Tim Sawyer wrote: > > > By the way, the Wacom model number is WP-430-2. > -- > Tim > :wq > > Begin forwarded message: > > * > * > *To: *repeater-buil...@yahoogroups.com > *Subject: **Re: [Repeater-Builder] Re: I

Fwd: [Repeater-Builder] Re: Intermod Calculation

2010-08-25 Thread Tim Sawyer
By the way, the Wacom model number is WP-430-2. -- Tim :wq Begin forwarded message: > > To: Repeater-Builder@yahoogroups.com > Subject: Re: [Repeater-Builder] Re: Intermod Calculation > > This is a couple of pass cavities, not a duplexer. Do the band pass cavities > hav

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-25 Thread Tim Sawyer
This is a couple of pass cavities, not a duplexer. Do the band pass cavities have the same problem? -- Tim :wq On Aug 25, 2010, at 1:32 PM, DCFluX wrote: > I've seen this before on Wacom BpBr duplexers. Remove the coupling loop from > the cavity and re-solder the connectors. Use 2% silver bear

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-25 Thread DCFluX
I've seen this before on Wacom BpBr duplexers. Remove the coupling loop from the cavity and re-solder the connectors. Use 2% silver bearing solder if you can find it. On Wed, Aug 25, 2010 at 1:27 PM, Tim Sawyer wrote: > > > Here's the latest: We went up to our site yesterday. We added a lighting

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-25 Thread Tim Sawyer
Here's the latest: We went up to our site yesterday. We added a lighting arrestor to the receive antenna. We grounded the chassis/rail/cabinet as it was only grounded via the power cord previously. Didn't expect this to fix the paging problem, it just needed to be done. I did find a loose UHF

[Repeater-Builder] Re: Intermod Calculation

2010-08-24 Thread Walter H
We also had a problem with a 454 pager. Quintron with a 1/4 k amp. Only one in the metro area had a spur, but that one traveled as the PA cage changed temperature. Got a hold of the paging company, and they turned each one off until we saw the spur go away. Final tube had been replaced and not pr

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread Tim Sawyer
On Aug 21, 2010, at 6:38 PM, men...@pa.net wrote: > How long has the pager been in operation? > If it has been there for a long time either something changed in the > pager setup or something changed on your end. > > We've been having many problems at the site (including a broken tower cross a

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread Tim Sawyer
If that was the issue I'd think every other two meter repeater on the hill (and there are many) would have the my same problem. But they don't. -- Tim :wq On Aug 21, 2010, at 7:27 PM, larynl2 wrote: > > > --- In Repeater-Builder@yahoogroups.com, Tim Sawyer wrote: > > > > > Basically, there

[Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread larynl2
--- In Repeater-Builder@yahoogroups.com, Tim Sawyer wrote: > > Basically, there is one controller for both the 929.0375 and the 157.74 > transmitters. They also have two other transmitters on 929.6375 and 931.6625. Are the 929.0375 and 929.6375 transmitters at the same site as your repeater

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread men...@pa.net
elch. As the day >> >> progresses it gets worse. >> >> > -- >> >> > Tim >> >> > :wq >> >> > >> >> > On Aug 20, 2010, at 7:51 PM, Chuck Kelsey wrote: >> >> > >> >> >> I agree, if yo

[Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread Tom W2MN
We had a pager spur problem with our repeater (no pl). The problem would come and go. We determined it happened mostly with time of day (outside temperature). Sometime it was just a short 1 second event and sometimes it would hold for a bit more (maybe 2 -5 sec). We setup a satellite multimode radi

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread Tim Sawyer
Apparently, from what the tech said, this one is slated to go off the air in coming months, too. But I can't wait that long as our repeater is basically useless at this point. And you never know, it might take them longer than that to actually kill it. -- Tim :wq On Aug 21, 2010, at 1:02 PM, M

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread Tim Sawyer
The meter reads P-P just like the scope. I generally set dev with the meter and confirm it on the scope. But your right, this really doesn't matter. I was just making sure they didn't have the dev out of wack and from what I gather here they don't. We're going up Tuesday with another repeater a

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread MCH
he >> >> mornings. The paging transmitter can be going off like crazy and >> >> the repeater will be totally clean in carrier squelch. As the day >> >> progresses it gets worse. >> >> > -- >> >> > Tim >> >> > :wq >

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread MCH
There is something wrong with your SM, then, as it should not show a deviation of 15 kHz on a signal that is 15 kHz P-P unless it's only deviating in one direction from the carrier. The +/- 4 kHz sounds about right. But, it should be centered around the carrier frequency of 157.740 (Or, on 157.

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread Tim Sawyer
; >> > Tim > >> > :wq > >> > > >> > On Aug 20, 2010, at 7:51 PM, Chuck Kelsey wrote: > >> > > >> >> I agree, if you don't hear anything else in the mix, and it pretty much > >> >> happens for the full length of

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread Tim Sawyer
My service monitor (HP 8924C) has both a deviation meter and an oscilloscope to display the demodulated audio. Both the numbers on the dev meter and the peak to peak on the scope read about 15 Khz. I see another paging system (152.84) that shows the same 15 Khz dev, and a bunch of other ones

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread Tim Sawyer
- > > From: Repeater-Builder@yahoogroups.com > > [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Tim Sawyer > > Sent: Saturday, August 21, 2010 1:33 PM > > To: Repeater-Builder@yahoogroups.com > > Subject: Re: [Repeater-Builder] Re: Intermod Calculation > >

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread MCH
Before you said 15 kHz P-P (IOW bandwidth). Now you're saying 15 kHz deviation. 15 kHz deviation would be way too high. Joe M. Tim Sawyer wrote: > > > I haven't noticed a hum. There's more of a scream on it. > > It's POCSAG. Is that analog? > > The dev is basically 15 Khz but there is, wha

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread men...@pa.net
t;>>>> >> >>>>> Does the entire page happen, or does it abruptly stop part way through >> >>>>> some >> >>>>> of the time? Partial page would indicate to me that another >> >>>>> transmitter is >&g

RE: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread Jeff DePolo
f Tim Sawyer > Sent: Saturday, August 21, 2010 1:33 PM > To: Repeater-Builder@yahoogroups.com > Subject: Re: [Repeater-Builder] Re: Intermod Calculation > > > > I haven't noticed a hum. There's more of a scream on it. > > It's POCSAG. Is that analog? &

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread Tim Sawyer
I haven't noticed a hum. There's more of a scream on it. It's POCSAG. Is that analog? The dev is basically 15 Khz but there is, what I going to call splatter that is like 30 Khz. -- Tim :wq On Aug 21, 2010, at 10:14 AM, MCH wrote: > Many times (but not all), there will be a grungy sound wit

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread Tim Sawyer
Yes the repeater has CTCSS but I turn it off for testing. When on the CTCSS will false but that's not what I'm talking about when I say that the repeater sometimes keys up after the beginning of the page. I'm going to take another repeater which has a different 1st IF up and test with just as

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread MCH
Many times (but not all), there will be a grungy sound with the spur. Think of a very loud 60 cycle hum. And 15 kHz is higher than normal. I think the typical shift is 5 kHz (+/- 2.5 kHz) if we are talking about digital paging. Analog might be 15 kHz, as the bandwidth limit would be 16 kHz. Jo

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread Matthew Kaufman
Tim Sawyer wrote: > > > It seems to pick up most of the page. Occasionally the beginning is > missing or it will get just the very end. It always seems to drop at > the same time as the page. > Does the repeater run CTCSS on the input? If so, is the behavior the same if CTCSS is off? (CTCSS mig

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread Tim Sawyer
gt; >> Chuck > >> WB2EDV > >> > >> > >> > >> - Original Message - > >> From: "MCH" > >> To: > >> Sent: Friday, August 20, 2010 10:46 PM > >> Subject: Re: [Repeater-Builder] Re: Intermod Calculatio

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread Tim Sawyer
I'm not sure what you mean by grungy. What are you getting at? -- Tim :wq On Aug 21, 2010, at 6:59 AM, MCH wrote: > Does it have a 'grungy' sound to it when you hear it on your input?

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread MCH
>> >> >> >> - Original Message - >> From: "MCH" >> To: >> Sent: Friday, August 20, 2010 10:46 PM >> Subject: Re: [Repeater-Builder] Re: Intermod Calculation >> >> >>> Could be a spur. Can you hear any other au

RE: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread Mike Besemer (WM4B)
WM4B _ From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Tim Sawyer Sent: Saturday, August 21, 2010 9:37 AM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Re: Intermod Calculation Another tidbit about this problem is that it&#x

RE: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread Mike Besemer (WM4B)
-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] Re: Intermod Calculation I'm in Huntington Beach. -- Tim :wq On Aug 20, 2010, at 8:52 PM, Mike Besemer (WM4B) wrote: Tim, Where are you located? 73, Mike WM4B _ From: <mailto:Repeater

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-21 Thread Tim Sawyer
- > From: "MCH" > To: > Sent: Friday, August 20, 2010 10:46 PM > Subject: Re: [Repeater-Builder] Re: Intermod Calculation > > >> Could be a spur. Can you hear any other audio with the page? (ever) >> >> Joe M. >> >> Tim Sawyer wr

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-20 Thread Tim Sawyer
com > [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Tim Sawyer > Sent: Friday, August 20, 2010 11:49 PM > To: Repeater-Builder@yahoogroups.com > Subject: Re: [Repeater-Builder] Re: Intermod Calculation > > > > > > No, I never, ever have heard any other

RE: [Repeater-Builder] Re: Intermod Calculation

2010-08-20 Thread Mike Besemer (WM4B)
to my receiver. In that case, I always heard the entire >>> page, >>> but only when that particular transmitter came up. >>> >>> Chuck >>> WB2EDV >>> >>> - Original Message ----- >>> From: "Tim - WD6AWP" mailto:tisawy

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-20 Thread Tim Sawyer
eiver. In that case, I always heard the entire >>> page, >>> but only when that particular transmitter came up. >>> >>> Chuck >>> WB2EDV >>> >>> - Original Message - >>> From: "Tim - WD6AWP" mailto:tisawyer%40gmail

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-20 Thread Chuck Kelsey
nt: Friday, August 20, 2010 10:46 PM Subject: Re: [Repeater-Builder] Re: Intermod Calculation > Could be a spur. Can you hear any other audio with the page? (ever) > > Joe M. > > Tim Sawyer wrote: >> >> >> It seems to pick up most of the page. Occasionally the begi

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-20 Thread MCH
lways heard the entire >> page, >> but only when that particular transmitter came up. >> >> Chuck >> WB2EDV >> >> - Original Message - >> From: "Tim - WD6AWP" mailto:tisawyer%40gmail.com>> >> To: > <mailto:Repeater-B

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-20 Thread Tim Sawyer
tters was spurious > and getting into my receiver. In that case, I always heard the entire page, > but only when that particular transmitter came up. > > Chuck > WB2EDV > > - Original Message - > From: "Tim - WD6AWP" > To: > Sent: Friday, August 2

Re: [Repeater-Builder] Re: Intermod Calculation

2010-08-20 Thread Chuck Kelsey
PM Subject: [Repeater-Builder] Re: Intermod Calculation > It occurs whether or not the repeater transmitter is keyed. > > --- In Repeater-Builder@yahoogroups.com, "Jeff DePolo" wrote: >> >> >> Before we get into the math, an important question that needs t

[Repeater-Builder] Re: Intermod Calculation

2010-08-20 Thread Tim - WD6AWP
It occurs whether or not the repeater transmitter is keyed. --- In Repeater-Builder@yahoogroups.com, "Jeff DePolo" wrote: > > > Before we get into the math, an important question that needs to be answered > is whether or not this mix occurs when your repeater transmitter is unkeyed. > > >