Re: [Repeater-Builder] Re: Wouxun Radio

[Glenn Little WB4UIV]

Do not know the date.
The serial number is J07-7405.

I got mine a week ago.

73
Glenn
WB4UIV

At 09:25 AM 8/30/2010, you wrote:


>Glen,
>Seems that this may be dependent on the radios manufacture date
>What is the production number of your Vhf/220 unit?
>
>Regards.
>Steve
>
>--- In Repeater-Builder@yahoogroups.com, Glenn Little WB4UIV 
> wrote:
> >
> > Mine will do 5.00, 6.25, 10.00, 12.50, 25.00, 50.00 and 100.00 KHz.
> >
> > 73
> > Glenn
> > WB4UIV
> >
> >
> >
> > At 09:35 PM 8/29/2010, you wrote:
> > >John (et all) -
> > >
> > >Is the 1.25M version capable of 20 kHz steps?  The spec sheet makes
> > >it look like it can only do 12.5 or 25 kHz steps.
> > >
> > >- JimF  K6IYK
> > >
> > >At 8/29/2010 06:06 PM, k7ve wrote:
> > > >
> > > >3e. Re: Wouxun Radio
> > > > Posted by: "John D. Hays" j...@... k7ve
> > > > Date: Sun Aug 29, 2010 2:29 pm ((PDT))
> > > >
> > > >I bought the 2m/1.25cm version from http://wouxun.us/ at Dayton this
> > > >year to give me a 222 mHz handheld, it has been working great, including
> > > >surviving a 3 foot drop to concrete :)  --- it operates 5W on 2m and 4W
> > > >on 1.25m.  (I prefer dealing with a US distributor vs. an Ebay Hong Kong
> > > >dealer.)
> > > >
> > > >--
> > > >John D. Hays
> > > >Amateur Radio Station K7VE <http://k7ve.org>
> > > >PO Box 1223
> > > >Edmonds, WA 98020-1223
> > > >VOIP/SIP: j...@... 
> > > >
> > > ><mailto:j...@...>
> > >
> > >
> > >James T. Fortney
> > >j...@...
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >Yahoo! Groups Links
> > >
> > >
> > >
> >
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Re: Wouxun Radio

[Glenn Little WB4UIV]

Mine will do 5.00, 6.25, 10.00, 12.50, 25.00, 50.00 and 100.00 KHz.

73
Glenn
WB4UIV



At 09:35 PM 8/29/2010, you wrote:
>John (et all) -
>
>Is the 1.25M version capable of 20 kHz steps?  The spec sheet makes
>it look like it can only do 12.5 or 25 kHz steps.
>
>- JimF  K6IYK
>
>At 8/29/2010 06:06 PM, k7ve wrote:
> >
> >3e. Re: Wouxun Radio
> > Posted by: "John D. Hays" j...@hays.org k7ve
> > Date: Sun Aug 29, 2010 2:29 pm ((PDT))
> >
> >I bought the 2m/1.25cm version from http://wouxun.us/ at Dayton this
> >year to give me a 222 mHz handheld, it has been working great, including
> >surviving a 3 foot drop to concrete :)  --- it operates 5W on 2m and 4W
> >on 1.25m.  (I prefer dealing with a US distributor vs. an Ebay Hong Kong
> >dealer.)
> >
> >--
> >John D. Hays
> >Amateur Radio Station K7VE 
> >PO Box 1223
> >Edmonds, WA 98020-1223
> >VOIP/SIP: j...@hays.org 
> >
> >
>
>
>James T. Fortney
>j...@fortney.org
>
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Re: Wouxun Radio

[Glenn Little WB4UIV]

What is it that these "licensed" hams do not understand about using 
equipment in the ham bands???
You can build your own equipment (remember those days?).
There is NO type acceptance for amateur equipment.

There are limitations as to how much you can build or modify in a 
year to cut down on amateur equipment being used in other services (CB).

There is no FCC approval for ham use.
If commercially made it must meet part 15 requirements to be sold.

QED

73
Glenn
WB4UIV



At 01:49 PM 8/29/2010, you wrote:
>I would not want to put one on PS or commercial freqs, amateur 
>only.  Would it be OK for amateur?  The only reason I ask is I do 
>not want to put my amateur and GROL licenses in jeopardy (worked way 
>to hard for them) if I purchase one and transmit on amateur 
>frequencies.  For PS and commercial (only when doing maintenance on 
>one of their systems), I only use FCC approved equipment.
>
>--- In Repeater-Builder@yahoogroups.com, "Eric Lemmon"  wrote:
> >
> > Doug,
> >
> > You make some very good points, but let's not forget that the proof of FCC
> > approval is not merely a paper label stuck on the radio;  there must be a
> > TCB or TA grant published on the OET Web site that lists that 
> specific radio
> > by model number, emission, and frequency range.  The FCC is currently
> > investigating the influx from China of cheap portables bearing Puxing,
> > Linton, HYT, and Wouxon brands- some of which have labels that read "FCC
> > TYPE ACCEPTED" but without an FCC ID number, and no basis in fact of
> > receiving a grant.  Indeed, some of these radios share the same internals
> > even though the outside cases are different.  On the other hand, one
> > particular brand and model may have different internals.  I have a Puxing
> > 777 that has a completely different mainboard from a friend's Puxing 777.
> >
> > We agree that licensed Amateur operators may use these cheap radios on
> > Amateur frequencies without any legal issues.  But, the notion 
> that they may
> > be used in Public Safety applications is disquieting.
> >
> > 73, Eric Lemmon WB6FLY
> >
> >
> >
> >
> > -Original Message-
> > From: Repeater-Builder@yahoogroups.com
> > [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Doug Bade
> > Sent: Sunday, August 29, 2010 9:11 AM
> > To: Repeater-Builder@yahoogroups.com
> > Subject: Re: [Repeater-Builder] Re: Wouxun Radio
> >
> >
> >
> > What I see is they type accepted a radio that looks like that one but the
> > type acceptance number issued does not necessarily mean the Ebay radios are
> > unless they bear the type acceptance label... There are many models and not
> > all may be approved...
> > However... in any case.. if you are the importer for your own amateur radio
> > use... Emissions are your amateur responsibility...ultimately... as we can
> > "build or modify" whatever we want as long as our emissions are
> > appropriate...re-selling without any type acceptance would seem to be
> > questionable.. My hamfest committee thought about giving them out as hourly
> > prizes... and my caution to them was own use vs distribution are 
> 2 different
> > issues on a non amateur type accepted radio..
> >
> > If THESE particular one do have part 90 labels.. then using them on amateur
> > ok and is a moot point.. distribution or otherwise.. but if they 
> do not have
> > labels.. using for own use would seem to be the limit.. as selling
> > un-certified radios or even giving them away would seem to be not legal...
> >
> > I would be glad to hear if someone has purchased from one of these dealers
> > and they ARE bearing part 90 labels... then my hamfest committee would be
> > ok..
> >
> > Doug
> > KD8B
> >
> >
> > On 8/29/2010 11:54 AM, Eric Lemmon wrote:
> >
> >
> >
> >   Phil,
> >
> >   What FCC identification number did you use to find the Wouxun
> > listing on the
> >   FCC site? I tried both the name and the model number, but came up
> > with no
> >   listing at all.
> >
> >   73, Eric Lemmon WB6FLY
> >
> >
> >   -Original Message-
> >   From: Repeater-Builder@yahoogroups.com
> > 
> >   [mailto:Repeater-Builder@yahoogroups.com
> >  ] On Behalf Of kg6ziu
> >   Sent: Sunday, August 29, 2010 8:38 AM
> >   To: Repeater-Builder@yahoogroups.com
> > 
> >   Subject: [Repeater-Builder] Re: Wouxun Radio
> >
> >   Terry,
> >
> >   I wondered the same question about a year ago and discovered that
> > they are
> >   type-accepted. Not that I would allow one on a system that I was in
> > charge
> >   of for PS work. I looked on the FCC website and saw that they
> > were...
> >
> >   There is nothing saying that they can't be used on a HAM system
> > though.
> >
> >   Hope this helps,
> >
> >   Phil KK6PE
> >
> >   --- In Repeater-Builder@yahoogroups.com
> > 

Re: [Repeater-Builder] Dielectric diplexer

[Glenn Little WB4UIV]

I disassembled one for channel 4.
The cavities were about 3 feet in diameter.
I salvaged the plungers for the INVAR rods.
The diplexer was mounted on a huge roll around aluminum frame.
The cavities were connected with 3 inch ridge line.
There were four cavities, two fir video and two for audio.
There was a 5 KW reject load attached as well as two power meters for 
3 in line.
The slugs for these look like Bird 43 slugs and will fit into a Bird 
43 meter, however, the coupling is wrong for a standard Bird line 
section, so, the slugs read very low, ie, 500 Watts pins the meter 
with a 25KW slug installed.

Have you seen what you are getting?

A friend of mine made fuel tanks for his generator from the channel 4 cavities.

I suspect that you could get the cavities to 220 MHz,

At 25KW, I suspect that your cavities are also fed with 3 inch rigid line.

73
Glenn
WB4UIV




At 07:37 PM 8/11/2010, you wrote:
>I have just been told I am about to receive a dielectric brand 
>diplexer rated at 25000 watts on 191 Mhz from a analog TV 
>station.  I feel a little bit like the dog that catches the car he 
>is chasing.  Now that I have it, what can I do with it?  Any 
>ideas?  Can it go to 220? Does anyone have any experience with these?
>Thanks
>Bill N4XIR
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Re: Mystery Micor problem

[Glenn Little WB4UIV]

If you have another channel element that has a crystal, I would use 
it to determine if the problem is in the radio or the element.
I suspect that the bad capacitor is in the element.

What is the part number of the channel element?

73
Glenn
WB4UIV

At 10:03 PM 8/9/2010, you wrote:
>Glenn,
>Is it safe to say look in the channel element for the bad cap ?
>Tempeture is not a issue with this unit it was in a heated and A/C 
>garage kept about 65-80 degrees with dehumdifer. I am glad the new 
>site is climate controlled also.
>
>Ryan n3ssl
>
>--- In Repeater-Builder@yahoogroups.com, Glenn Little WB4UIV 
> wrote:
> >
> > We had this problem in Johnson radios.
> > What it turned out to be was a plate of a silver mica capacitor
> > coming disconnected internally in the capacitor.
> > This caused the capacitor to shift to a lower capacitance by the
> > amount that the plate contributed to the capacitor.
> > The lower capacitance caused the radio frequency to shift high and
> > outside the tuning range of the netting device.
> > I cannot tell you what capacitor has failed.
> > Check the silver mica capacitors in the tuning circuit and replace
> > the one that is low in value.
> >
> > I also have not been in a Micor element in many years.
> >
> > Hope this helps.
> > This appears to be a somewhat common failure for silver mica
> > capacitor due to the way the capacitor is physically constructed.
> >
> > 73
> > Glenn
> > WB4UIV
> >
> >
> > At 09:09 PM 8/8/2010, you wrote:
> > >Glenn, OZ and group
> > >
> > >Its a step jump 5 khz up and get - 200 hz of crystal movment. What
> > >silver mica Cap is it? I have not looked inside a channel element in
> > >years usally send them out and trust the mfg.
> > >
> > >I also gave the crystal movement a thought but was is a temp
> > >controlled enviroment.
> > >
> > >Ryan
> > >
> > >--- In Repeater-Builder@yahoogroups.com, Glenn Little WB4UIV
> > > wrote:
> > > >
> > > > Was the shift a drift or a step jump?
> > > >
> > > > If a step jump, you probably have a bad silver mica capacitor.
> > > >
> > > > 73
> > > > Glenn
> > > > WB4UIV
> > > >
> > > > At 04:23 PM 8/8/2010, you wrote:
> > > > >Hi Group,
> > > > >
> > > > >I have a Micor mobile set up as repeater. Worked great and was on
> > > > >frequency for over 8 years no problems.(lost rpt site May 2010) and
> > > > >have a new site to get on.The problem i am having is the TX drifted
> > > > >5 khz up on TX from 145.310 to 145.315. I get plenty of deviation
> > > > >and audio drive and 9.6 v to crystal element. I am not having any
> > > > >luck messing with Netting adjustment i get -200 hz max. I also have
> > > > >a UHF Rx unit for control installed and it is 10khz low on frequency.
> > > > >
> > > > >
> > > > >The 144.710 RX crystal is right on the money for specs. Very odd
> > > > >situation. anyone have ideas where to check or a fluke the crystals
> > > > >are both bad.
> > > > >
> > > > >Ryan n3ssl
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >
> > > > >Yahoo! Groups Links
> > > > >
> > > > >
> > > > >
> > > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >Yahoo! Groups Links
> > >
> > >
> > >
> >
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Re: Mystery Micor problem

[Glenn Little WB4UIV]

We had this problem in Johnson radios.
What it turned out to be was a plate of a silver mica capacitor 
coming disconnected internally in the capacitor.
This caused the capacitor to shift to a lower capacitance by the 
amount that the plate contributed to the capacitor.
The lower capacitance caused the radio frequency to shift high and 
outside the tuning range of the netting device.
I cannot tell you what capacitor has failed.
Check the silver mica capacitors in the tuning circuit and replace 
the one that is low in value.

I also have not been in a Micor element in many years.

Hope this helps.
This appears to be a somewhat common failure for silver mica 
capacitor due to the way the capacitor is physically constructed.

73
Glenn
WB4UIV


At 09:09 PM 8/8/2010, you wrote:
>Glenn, OZ and group
>
>Its a step jump 5 khz up and get - 200 hz of crystal movment. What 
>silver mica Cap is it? I have not looked inside a channel element in 
>years usally send them out and trust the mfg.
>
>I also gave the crystal movement a thought but was is a temp 
>controlled enviroment.
>
>Ryan
>
>--- In Repeater-Builder@yahoogroups.com, Glenn Little WB4UIV 
> wrote:
> >
> > Was the shift a drift or a step jump?
> >
> > If a step jump, you probably have a bad silver mica capacitor.
> >
> > 73
> > Glenn
> > WB4UIV
> >
> > At 04:23 PM 8/8/2010, you wrote:
> > >Hi Group,
> > >
> > >I have a Micor mobile set up as repeater. Worked great and was on
> > >frequency for over 8 years no problems.(lost rpt site May 2010) and
> > >have a new site to get on.The problem i am having is the TX drifted
> > >5 khz up on TX from 145.310 to 145.315. I get plenty of deviation
> > >and audio drive and 9.6 v to crystal element. I am not having any
> > >luck messing with Netting adjustment i get -200 hz max. I also have
> > >a UHF Rx unit for control installed and it is 10khz low on frequency.
> > >
> > >
> > >The 144.710 RX crystal is right on the money for specs. Very odd
> > >situation. anyone have ideas where to check or a fluke the crystals
> > >are both bad.
> > >
> > >Ryan n3ssl
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >Yahoo! Groups Links
> > >
> > >
> > >
> >
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Mystery Micor problem

[Glenn Little WB4UIV]

Was the shift a drift or a step jump?

If a step jump, you probably have a bad silver mica capacitor.

73
Glenn
WB4UIV

At 04:23 PM 8/8/2010, you wrote:
>Hi Group,
>
>I have a Micor mobile set up as repeater. Worked great and was on 
>frequency for over 8 years no problems.(lost rpt site May 2010) and 
>have a new site to get on.The problem i am having is the TX drifted 
>5 khz up on TX from 145.310 to 145.315. I get plenty of deviation 
>and audio drive and 9.6 v to crystal element. I am not having any 
>luck messing with Netting adjustment i get -200 hz max. I also have 
>a UHF Rx unit for control installed and it is 10khz low on frequency.
>
>
>The 144.710 RX crystal is right on the money for specs. Very odd 
>situation. anyone have ideas where to check or a fluke the crystals 
>are both bad.
>
>Ryan n3ssl
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Narrowbanding

[Glenn Little WB4UIV]

I do not know about Nextel, but, the US DTV signal fits into a 6 MHz bandwidth.
We use a mask filter to ensure that the bandwidth is no more than 6 MHz.
500 kHz from band edge <= -47 dB
6 MHz from band edge <= -110 dB

73
Glenn
WB4UIV

At 10:58 AM 8/2/2010, you wrote:
>On 8/2/2010 10:45 AM, Scott Zimmerman wrote:
> > I was wondering about that myself. The bandwidths spec'd just didn't
> > seem to compute in my feeble mind.
> >
> > Scott
> >
> > Scott Zimmerman
> > Amateur Radio Call N3XCC
> > 474 Barnett Road
> > Boswell, PA 15531
> >
> >
> > Jeff DePolo wrote:
> >>
> >>> Florida Repeater Coordinator proposes narrowbanding:
> >>>
> >>> http://www.florida-repeaters.org/FRC%202meter%20narrowband%20p
> >> olicy%20released%207-18-10.pdf
> >>
> >> Apparently Carson's Rule works different in Florida than it does 
> everywhere
> >> else.
> >>
> >>  --- Jeff WN3A
> >>
>
>Course, wiki says Carson's rule "is of little use in spectrum planning"
>anyway...(http://en.wikipedia.org/wiki/Carson_bandwidth_rule). These
>must be the same people that think Nextel's iDen 6:1 TDMA format fits in
>a 25 KHz channel, or that think the US DTV standard fits in a 6 MHz
>channel...NOT!
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

[Repeater-Builder] Invar Rods

[Glenn Little WB4UIV]

Does anyone need INVAR rods?
I salvaged some from a TV audio / video RF combiner.

73
Glenn
WB4UIV

[Repeater-Builder] Tone Boards

[Glenn Little WB4UIV]

I have some tone boards that I no longer need.
Two are Regency 504-046B
Three I think are EF Johnson, they are marked 006B036 with a serial 
number after that on a gummed label. These had a daughter board, 
which I think, sets the frequency.
I have one unknown board marked PD-085AA with a black epoxy coated 
hybrid marked DE390.
The last board has the numbers removed from the chips. There are 2 14 
pin DIPs, 1 16 pin Dip and 2 10 pin TO-5 size chips. The board has 
050 under one 10 pin IC and 882 under the other. The board is copyrite 1982.

These are available for the postage to anyone that can use them.

73
Glenn
WB4UIV

Re: [Repeater-Builder] RF Fuses

[Glenn Little WB4UIV]

If I remember correctly, Cushman had a box that went in front of 
their communications monitors.
This was a small cast metal box with BNC connectors attached.
Inside was a small pigtail fuse between the connectors.
The fuse was rated at 1/32 Amp.

73
Glenn
WB4UIV

At 06:36 PM 3/20/2010, you wrote:
>Any ideas where I can buy RF fuses, either the actual fuse element 
>or the combination holder/fuse say in a BNC configuration, to 
>portect the input of a spectrum analyzer or service monitor?
>
>Dave WB2FTX
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Two coax and connector questions

[Glenn Little WB4UIV]

We all know that they are available.
But, this is the way out to get the type acceptance.
The FCC is all lawyers with no technical people on staff.

73
Glenn
WB4UIV

At 09:27 PM 3/3/2010, you wrote:
>Actually, RP-type (RP-SMA, RP-TNC, etc.) connectors are very easily
>available to the general public.
>
>wlan-parts.com
>oddcables.com
>
>etc, etc, etc.
>
>-Brian / KF4ZWZ
>
>On Wed, Mar 3, 2010 at 6:11 PM, Glenn Little WB4UIV
> wrote:
> > Reverse threaded connectors are used to get a piece of equipment past
> > FCC type acceptance.
> > The type acceptance paper work specifies the antenna that is used for
> > acceptance.
> > Any other antenna voids the type acceptance.
> >
> > Since reverse threaded connectors are not available to the general
> > public, the FCC bought off on this to prevent the antenna from 
> being changed.
> >
> > Another trick that is used is a connector with the wrong sex center
> > conductor pin.
> >
> > 73
> > Glenn
> > WB4UIV
> >
> >
> > At 06:08 PM 3/3/2010, you wrote:
> >>Hey guys,
> >>I was wondering if you all would entertain two questions that I have.
> >>
> >>First, what is the purpose/use of reverse polarity coax connectors
> >>such as SMA and TNC? I assume there are others but those are the
> >>ones I have seen.
> >>
> >>Secondly, I ran across something regarding using small diameter
> >>heliax in a mobile environment. I had never heard of that before and
> >>it seemed like it would be prone to vibration problems. I am
> >>probably wrong though. Anyone care to shed some light on that subject?
> >>
> >>Thanks
> >>Albert
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>Yahoo! Groups Links
> >>
> >>
> >>
> >
> >
> > 
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Two coax and connector questions

[Glenn Little WB4UIV]

Reverse threaded connectors are used to get a piece of equipment past 
FCC type acceptance.
The type acceptance paper work specifies the antenna that is used for 
acceptance.
Any other antenna voids the type acceptance.

Since reverse threaded connectors are not available to the general 
public, the FCC bought off on this to prevent the antenna from being changed.

Another trick that is used is a connector with the wrong sex center 
conductor pin.

73
Glenn
WB4UIV


At 06:08 PM 3/3/2010, you wrote:
>Hey guys,
>I was wondering if you all would entertain two questions that I have.
>
>First, what is the purpose/use of reverse polarity coax connectors 
>such as SMA and TNC? I assume there are others but those are the 
>ones I have seen.
>
>Secondly, I ran across something regarding using small diameter 
>heliax in a mobile environment. I had never heard of that before and 
>it seemed like it would be prone to vibration problems. I am 
>probably wrong though. Anyone care to shed some light on that subject?
>
>Thanks
>Albert
>
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] RE: follow up on lightening strike last spring

[Glenn Little WB4UIV]

Do you get the same crackling noise with the duplexer attached to a 
dummy load? a ground mounted antenna with different feedline?

73
Glenn
WB4UIV

At 06:12 PM 1/16/2010, you wrote:
>I know its been a long time since I first posed the question on what 
>might be causing the noise we were experiencing after being hit by 
>lightening. After many trips to the Technical shop for testing, we 
>replaced the repeater ( was a vertex 5000, now a Icom ur2000) and 
>are in process of checking out controllers. The duplexers were my 
>big worry. And yes, it would seem that concern wasn't unfounded. We 
>started experiencing a degradation on the receive side of the 
>repeater and then, a leakage from the cans. We had the duplexers 
>checked out with two different service monitors and found nothing! 
>The technician who works on duplexers took ours apart and found only 
>a little bit of carbon, but that was it. they checked out ok. We put 
>them back into service and the  noise was there making 
>communications impossible.
>We are now going to replace them with a 6 configuration instead of 
>the four we have been using.
>My question to the list is, besides the noise factor and crackling 
>noise, is there any other methode of discovering if the can's are bad or not?
>Yes, I did and have been losing sleep over this one.
>
>I also wish to thank Kevin and  the group for all their feedback on 
>my question I put in last summer. You helped more than you know.
>
>Rich Ranta K8JX
>www.w8usa.org
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

[Repeater-Builder] DB-4018 cavity

[Glenn Little WB4UIV]

This cavity was designed for the UHF aircraft band, 225-400 MHz.
Will it tune to the low end of our 220 MHz band?

Thanks
73
Glenn
WB4UIV

Re: [Repeater-Builder] pre-amp placement

[Glenn Little WB4UIV]

If the preamp has helical resonators on the input, it should not matter.
If the preamp does not have preselection, after the bandpass filter, 
unless you like the intermod that will be generated in the preamp.

73
Glenn
WB4UIV

At 10:46 PM 11/25/2009, you wrote:
>Hi,
>
>I have now read two different things about where to put the pre-amp.
>
>One says before the Bandpass and one after.
>
>What I have now is the 6 can duplexer is hooked to the bandpass and 
>then on the other side the pre-amp is connected and then a cable 
>goes from preamp to radio.
>
>The other article I read this past week says the preamp should go 
>between the cans and the bandpass.
>
>Which is right?  Or does it matter?
>
>73
>John
>
>
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Pager Interference to 2-meter & VHF Public Service Band

[Glenn Little WB4UIV]

Locally, years ago, we had a military transmitter that had a 
wandering spur. I am near Charleston, SC. The spur was strong enough 
to key up amateur radio repeaters in the two meter band from 
Wilmington, NC to Savannah, Ga.
The offender turned out to be a 250 Watt base station used to cover 
approximately 10 Acres.
The radio was a Motorola MICOR.
The service shop could not fix the problem, so, they replaced the transmitter.

This may be a spur from a transmitter.
The spur that we experienced wandered up the band, then, down the band.
The wander was slow enough that you could hear it approaching the 
repeater input frequency as a weak off frequency signal.
It would wander through the passband of the repeater in about 30-45 
seconds and again sound like a weak off frequency signal as the squelch closed.
The repeater was either in the 148 or the 150 MHz range and 
interfered with a 146.79, 146.82, 146.88 and a 149.94 MHz repeater.
It took about a week to get the problem taken care of.
The military had tried to classify the frequency of the repeater on 
this base due to the type of traffic that they handled.

Kind of hard to hide what you are doing when transmitting in the 
clear with that much power and having a spur keying up repeaters over 
the distance that this one did.

There is some software that allows finger printing of a transmission 
base on the lockup signature and oscillator stability as seen on the 
transmitted signal.
You could possibly compare the known probable offender with the 
offender through one of the interfered with repeaters or it's input frequency.

Wish you well with resolving the problem.

73
Glenn
WB4UIV


At 11:51 PM 10/28/2009, you wrote:
>I have to wonder how he can say his stuff is clean when this just
>started a couple weeks ago. Did he perform a PM check within the last
>two weeks? Unlikely.
>
>Stuff can go south in a minute, and seldom just before you check it.
>
>Joe M.
>
>Paul Plack wrote:
> >
> >
> > Mike,
> >
> > If it moves around based on time of day, my first guess is a PA that's
> > gone bad, and has a parasitic that's temperature-related.
> >
> > If you've tracked an individual spur drifting 70 kHz up the band during
> > a single transmission, this is not some (intentional) oscillator
> > drifting, but some combination of failed components or tuning which has
> > produced a parasitic.
> >
> > Sorry to say, but a paging transmitter owner swearing his stuff is clean
> > is pretty meaningless. The assumption in his industry is the
> > professionals who maintain his stuff are not the problem, it's "those
> > damn hams." Sadly, it may more often be the other way around these days,
> > as companies maintaining paging equipment have transitioned to
> > underpaid, under-trained card-swappers instead of component-level
> > technicians with a clue about RF systems.
> >
> > 73,
> > Paul, AE4KR
> >
> >
> > - Original Message -
> > *From:* Mike 
> > *To:* Repeater-Builder@yahoogroups.com
> > 
> > *Sent:* Wednesday, October 28, 2009 12:28 PM
> > *Subject:* [Repeater-Builder] Pager Interference to 2-meter & VHF
> > Public Service Band
> >
> >
> >
> > A couple of weeks ago, our repeater system started to experience
> > interference from a paging system...
> >
> >
> > ...one evening I tracked it from about 145.120 to 145.190 as it
> > swept through each transmission...
> >
> >
> >
> > .
> >
> >
> >
> >
> >
> >
> > 
> >
> >
> > Internal Virus Database is out of date.
> > Checked by AVG - www.avg.com
> > Version: 8.5.387 / Virus Database: 270.13.38/2274 - Release Date: 
> 07/31/09 05:58:00
> >
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Spectrum UHF Repeater SCR Crowbar circuit activating during TX

[Glenn Little WB4UIV]

I had a similar problem with a home brew supply.
My fix was a choke (100 uHy)in series with the gate as close to the 
gate a possible.
I bypassed the choke on both sides with 0.01 uF capacitors with leads 
as short as possible.
This fixed my problem.
You are probably rectifying RF inside the SCR.
You might want to also bypass the anode of the SCR.
Spectrum never was real good with engineering.

YMMV

73
Glenn
WB4UIV


You might need to experiment with the values for the choke and capacitors.
At 10:17 AM 10/15/2009, you wrote:
>Having problems with a SPECTRUM 4000 UHF repeater that the voltage 
>regulation works ok on RX, but when you kick it into TX, the SCR 
>fires and blows the fuse or frys the resistor.
>
>This is the newer version power supply board that has the current 
>limit control on it.
>
>We replaced the SCR and .25 ohm dump resistor, and it still triggers.
>I watched it trigger 2 times last night with a digital meter on the 
>circuit and saw no overvoltage contition, at least not what the dmm registered.
>
>Theory: Could a bad cap be letting RF back into the crowbar circuit, 
>causing the SCR to trigger from the RF rather then DC?
>
>Please Advise
>
>Ed N3SDO
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Need a TLD-2601A PA

[Glenn Little WB4UIV]

I have never worked for a radio company.

Was in the US Navy for 22 years.

73
Glenn
WB4UIV

At 08:20 AM 8/20/2009, you wrote:
>I remember going to the Glenayre paging company for training years ago.
>I saw that the factory had stripped off the gold plate on all the PA
>transistors before attaching them to the board.  This was critical for a
>PA that stayed key-down for hours, or even days.  The spare part
>transistors were also shipped with the gold removed, but were very
>expensive to purchase because of this extra work.  Now I know what the
>problem was called, "gold embrittlement".
>
>Thanks,
>
>73, Joe, K1ike
>
>PS; You aren't the Glenn that worked a Glenayre, are you?
>
>Glenn Little WB4UIV wrote:
> > Desolder the flat gold plated transistor leads.
> > Clean the black residue at the gold - tin interface.
> > Resolder the transistor leads after removing any gold left by tinning
> > the lead and removing the solder a few times.
> >
> > Gold embrittlement is very common.
> >
> > 73
> > Glenn
> > WB4UIV
> >
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Need a TLD-2601A PA

[Glenn Little WB4UIV]

Desolder the flat gold plated transistor leads.
Clean the black residue at the gold - tin interface.
Resolder the transistor leads after removing any gold left by tinning 
the lead and removing the solder a few times.

Gold embrittlement is very common.

73
Glenn
WB4UIV

At 10:25 PM 8/19/2009, you wrote:
>Our club's MSR-2000 repeater recently "ate" it's PA, a TLD-2601A.
>Actually it went intermittent on us and several folks have gone over it
>with the magnifying glass and reflowed most of the major solder joints
>to no avail.
>
>  That's a low split, 100 watt, continuous duty PA.  If anyone has one
>available we are interested.
>
>We are in the Baltimore Washington area and could pick up within a
>reasonable distance (whatever the heck that is!) rather than shipping
>the fairly heavy unit.
>
>73 de Tom/W4OKW (K3HKI Rpt)
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Getting mice out of a repeater sight

[Glenn Little WB4UIV]

Look the other way and the mice will be out of your sight.
Did you possibly mean your repeater site??

73
Glenn
WB4UIV


  At 04:19 PM 7/28/2009, you wrote:
>Hey guys,
>I am sure many of you have been through this before.
>The evil mice decided to waunder in to my repeater sight.  Up until now they
>avoided my repeater, but when I went up there, I was less than pleased.
>They didn't chew any wires thank god, but they walked across the top of the
>icom rp4020, and left some presents if you know what I mean.
>I need some input, what's the best way to clean it up, anything in
>particular?
>All the covers were on, so I don't think they got inside, but haven't pulled
>the cover off yet.
>Any ideas?
>
>Thanks,
>Jed
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] DTV ch 2 vs 6m

[Glenn Little WB4UIV]

If you interfere with the digital signal, the viewer will not know 
anything as to there being interference.
All they will see is that they cannot see the channel 2 TV station.
On the flip side, the digital wide band noise generated by the TV 
station will probably render 6M totally useless.
The digital transmitter has a Mask filter between the transmitter and 
the antenna.
The skirts on this filter are almost vertical.
This is a very effective filter.
The in specification out of band noise can be very high.

73
Glenn Little
WB4UIV
Chief Engineer
WCIV TV


At 09:42 PM 1/10/2009, you wrote:
>That's what I'm afraid of. It's already nearly impossible to do
>anything on 6m around here without problems with ch 2 analog. Once
>they go digital on ch 2 I'm expecting even more issues. But I guess
>time will tell...
>
>Paul
>
>
>MCH wrote:
> > If it's like any other digital transmitters, more.
> >
> > Joe M.
> >
> > Paul N1BUG wrote:
> >> I think this is on topic for the list since it could affect some 6
> >> meter repeater owners.
> >>
> >> After transition I will have a "local" channel broadcasting DTV on
> >> their low VHF channel 2 assignment. I'm curious... does anyone know
> >> whether DTV will be more (or less) susceptible to interference from
> >> ham radio transmissions than analog TV?
> >>
> >> Thanks & 73,
> >> Paul N1BUG
> >>
> >> 
> >>
> >>
> >>
> >> Yahoo! Groups Links
> >>
> >>
> >>
> >>
> >
> > 
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Old 220-222Mhz ACSSB system parts usable?

[Glenn Little WB4UIV]

Joe

These should work fine.

There is also a single cavity that was used in the receive line, IIRC.

I have a complete system that I picked up to haul it off. The 
transceivers were made by SEA.

Their stock answer is that they are not modifiable for any use other 
than what they were designed for.

After a lot of research, I have to agree. Probably the only thing 
that is useable from the transceivers is parts, possibly a PA.

I have not yet tried to retune the cavities, but the move is so small 
that I see no reason for them not to work.

73
Glenn
WB4UIV

At 10:42 AM 12/31/2008, you wrote:
>I have an opportunity to get a combiner/filter panel from a 220-222Mhz
>ACSSB system that was abandoned years ago.  Has anyone experimented with
>making a 222Mhz duplexer out of the parts in the Celwave rack that was
>used in this system?
>
>73, Joe, K1ike
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Astron P/S question

[Glenn Little WB4UIV]

I had a home built power supply that would 
shutdown every time that I transmitted on HF. The 
protection system was a little different and 
caused the power supply to go into foldback 
rather than blow the fuse. It required me to 
shutdown the supply to get it going again. The 
solution for me was to put a ferrite bead on the 
gate lead of the SCR and a bypass capacitor 
directly on the gate to ground on the SCR.

This fixed my RF problem. The SCR was rectifying 
the RF in the gate region causing the SCR to 
conduct. You may have rectification within the SCR.

Hope this helps.

73
Glenn
WB4UIV

At 10:53 AM 12/8/2008, you wrote:
>I've had DMMs also go nuts at my site too. 
>Luckily the Astron supply hasn't had that problem yet.
>
>The fuse usually blows when something 
>catastrophic happens. One such thing is when the 
>output voltage goes too high and the built-in 
>SCR crowbar fires. It shorts the supply 
>immediately, and the excess current usually 
>causes the fuse to blow. Sometimes it also 
>causes the diodes to short out, and they end up 
>blowing the fuse. RF getting back into the 
>supply can trip the SCR. Even RF riding on the 
>supply lines can cause the voltage that the SCR 
>sees to be high enough to trip it, even though 
>it may not show up with a meter or even a scope. 
>You've probably done all you can with the 
>ferrites unless you missed the wires going to 
>the SCR. On some supplies it's mounted to the 
>chassis and has fairly long wires (just waiting to pick up RF) running to it.
>
>You'd be better off with ANY kind of unregulated 
>power supply, such as what you had with the 
>MICOR supply. Ferro-resonant transformers 
>usually aren't susceptible to such RF problems, 
>and there's nothing electronic such as a crowbar 
>inside to trip and blow the fuse. This doesn't 
>explain why your MICOR supply blew its fuse, 
>unless you exceeded the output current 
>capability. Most MICORs were only rated up to 
>100 watts, and the supplies probably are good to 
>25-30 amps MAX; it seems that your PA is already 
>exceeding that. Then you tack on a receiver, 
>exciter, etc, and you've gone past the limit for 
>the MICOR supply. Even an MSF5000 supply would 
>be strained to handle that much current; that's 
>why the bigger stations have TWO supplies, one 
>for each PA, and the VHF stations have 28V supplies in them.
>
>Solutions? You might consider a battery and a 
>charger that's strong enough to keep the PA 
>happy, to run just the PA. Split everything else 
>off and run that on another smaller supply. 
>Consider a switching regulator supply, rather 
>than a linear regulator supply, to run the rest of the equipment.
>
>I know that some of the high power amps are now 
>being built to run on 24-28VDC. This cuts the 
>current consumption in half and they can be run with switching supplies.
>
>Let's hope Skip comes aboard here. I know he's 
>had experience with these units.
>
>Bob M.
>==
>--- On Mon, 12/8/08, n9wys <[EMAIL PROTECTED]> wrote:
>
>From: n9wys <[EMAIL PROTECTED]>
>Subject: [Repeater-Builder] Astron P/S question
>To: Repeater-Builder@yahoogroups.com
>Date: Monday, December 8, 2008, 10:20 AM
>
>For the learned group here…
>Â
>I know there has been some discussion on one the 
>list regarding Astron Power 
>supplies.  Unfortunately, searching hasn’t 
>revealed what I am looking for, so I pose my 
>query here and apologize in advance if this was 
>a subject that was discussed at length in the 
>past…Â  I will ddescribe my problem in detail, 
>so forgive me for being so verbose right off the 
>bat; but I figure if I provide a lot of info 
>now, it will avoid a lot of question and answer 
>exchanges later in order to get an understanding of my problem.
>Â
>I have a UHF ham repeater system (TKR-820 as 
>transmitter, MICOR SpectraTAC receiver and 
>comparator, Astron RM-70 Power Supply, and 
>Crescend 150W P/A) that is experiencing issues 
>with the power supply.  Seems that when the 
>repeater is on the air for any time (for 
>example, over three minutes key-down) the power 
>supply blows a fuse.  The first time this 
>happened, I changed out the P/S with a MICOR 
>supply I had from a 100W continuous duty 
>station.  It also blew THAT fuse…Â  The Astron 
>supply that  blew the fuse had two bad diodes in 
>the rectifier, so that was repaired.  There was 
>nothing found wrong with the Motorola supply, 
>other than the main fuse had blown.
>Â
>I took the PA back to Crescend, but they found 
>nothing wrong with the P/A. Â The station was 
>put back on the air with the repaired Astron 
>supply.  Was on the air for about two weeks, 
>and failed again while I was talking to another 
>ham.  Went back to the tower and found the fuse 
>blown again in the supply.  I took the PA 
>offline and brought it back to Crescend, told 
>them of the issue with the P/S, and that I 
>needed them to check the PA for problems. Their 
>service tech called me and said he’d had the 
>PA running on his workbenc

[Repeater-Builder] Need Info on Wilson radio

[Glenn Little WB4UIV]

I just bought a Wilson WS201 Mobile transceiver in the hopes of using 
the receiver for a repeater receiver.
This is a crystal controlled radio. I cannot locate any information 
on this radio. The FCC ID even comes back as a no find. The FCC ID is 
ATE9PLWS201. ATE comes back as a Regency type acceptance number.

Does anyone have a manual or schematics for this radio?

Any help appreciated.

73
Glenn
WB4UIV

Re: [Repeater-Builder] UHF LINK ANTENNA QUESTION HELP NEEDED!

[Glenn Little WB4UIV]

You can try lowering the antenna.

You can try a better antenna, one with a better front to back ratio 
and better side lobe rejection.

If that does not work, you can try something that we do to our 
microwave dishes when we receive off axis interference, place a 
shield near the side of the yagi on the side if the offending signal. 
The shield should be grounded to prevent it from reradiating the 
offending signal.

If the offending signal is not very strong and you can overpower it 
with the desired signal, you can use a CTCSS tone to keep your 
receiver quiet until the desired signal is received.

73
Glenn
WB4UIV



At 01:00 AM 9/28/2008, you wrote:
>Can anyone please offer me some assistance.
>
>I am trying to link my VHF repeater to a club machine on 440 MHZ.
>
>For now I received permission to link directly on their input until
>the club installs a remote base and yagi next spring.
>
>There repeater is about 20 air miles away. I am using a 5 element UHF
>Yagi about 45 feet up a 170 Rohn 65 at my hub site!
>
>The Yagi is facing due West. The link works fantastic with 5 watts
>however I am receiving a 440 MHZ repeater on the same input over 100
>air miles away to the South. 90 degrees off the side of the Yagi.
>
>So my question is. Any input to solve this antenna related problem to
>Buffer that weak signal from the south?
>
>Any move of the antenna lowering, different antenna etc...
>
>Any ideas would be greatly appreciated
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Re: Micor TPN1110A power supply parts ID

[Glenn Little WB4UIV]

The capacitance may be split between capacitors to reduce the effects 
of internally generated heat, ESR and inductance.

I would use the same number of capacitors as the engineer that 
designed the supply specified.

I would also use 105 degree C capacitors that have the lowest ESR 
that I could afford and would handle the highest ripple current.


73
Glenn
WB4UIV

At 09:24 PM 9/19/2008, you wrote:
>I think you're probably right.  I found a source for the OEM caps at
>$9 each, but may I'm better off just fabricating some sort of
>mounting mechanism and using newer style caps.
>
>Rather than using 2 17500uf either side of the chokes and four after
>the last choke, could I just use one 40,000uf or so either side, and
>two 40,000 after the last choke?   Unless I'm forgetting something,
>more capacitance can't hurt, no?
>
>
>Eric
>KE2D
>
>
>--- In Repeater-Builder@yahoogroups.com, "Bob M." <[EMAIL PROTECTED]>
>wrote:
> >
> > The problem with buying NOS caps is that they might have been new
>in 1980. They've been sitting on the shelf for all this time, and
>might not be much better than what you have now (unless yours are
>shorted).
> >
> > Bob M.
> > ==
> > --- On Fri, 9/19/08, kk2ed <[EMAIL PROTECTED]> wrote:
> >
> > > From: kk2ed <[EMAIL PROTECTED]>
> > > Subject: [Repeater-Builder] Re: Micor TPN1110A power supply parts
>ID
> > > To: Repeater-Builder@yahoogroups.com
> > > Date: Friday, September 19, 2008, 12:48 AM
> > > Thanks for the reply/suggestion. A stud mount of greater
> > > current
> > > rating may be the way to go. I could just drill out of the
> > > existing
> > > mounting holes and use the stud mount and a nut/washer
> > > combo.
> > >
> > > However, after googling till my eyes fell asleep, I found a
> > > few
> > > sources on the web for the original diode - which turns out
> > > to be a
> > > 1N3492R. So that takes care of the diodes -
> > >
> > > Now, on to the caps.  I mistyped last evening, as they are
> > > 17500uf
> > > and not 27000uf.  Not as much luck, but I did find one
> > > supplier
> > > listing NOS Moto numbered caps on their web site. I
> > > requested
> > > pricing. Depending on the price, I will either buy them or
> > > retrofit a
> > > newer style cap.
> > >
> > > Eric
> > > KE2D
> > >
> > >
> > >
> > > --- In Repeater-Builder@yahoogroups.com, Captainlance
> > >  wrote:
> > > >
> > > > THE DIODES CAN BE REPLACED WITH 1N1191A, THEY ARE
> > > "REVERSE"
> > > POLARITY, AND CAN BE SCREWED DIRECTLY TO THE CHASSIS. I
> > > HAVE USED
> > > THEM MANY TIME WITH GREAT LUCK... AND THEY HANDLE LOTS MORE
> > > CURRENT
> > > THAN THE FACTORY ONES DO.
> > > > LANCE N2HBA
> > > >   - Original Message -
> > > >   From: kk2ed
> > > >   To: Repeater-Builder@yahoogroups.com
> > > >   Sent: Thursday, September 18, 2008 9:10 AM
> > > >   Subject: [Repeater-Builder] Re: Micor TPN1110A power
> > > supply parts
> > > ID
> > > >
> > > >
> > > >   The diodes CR1 and CR2 are compression-fitted style
> > > rectifier
> > > diodes
> > > >   that are pressed into a rectangle stock of aluminum,
> > > and the
> > > aluminum
> > > >   is then secured to the chassis via two screws. The
> > > diodes have
> > > one
> > > >   solder lug terminal.
> > > >
> > > >   The service manual only lists the Motorola part #;
> > > no specs or
> > > >   industry-standard part # is given. Same on the caps.
> > > Only spec
> > > given
> > > >   is 27,000 uf @ 20wvdc.
> > > >
> > > >   I did a quick search of Mouser and DigiKey, and was
> > > unable to
> > > find
> > > >   any chassis-mount style caps. Anyone find something
> > > suitable that
> > > can
> > > >   be re-secured to the ps's chassis via new rivets
> > > or screws? I
> > > know I
> > > >   can just solder in any cap that meets electrical
> > > specs, but I
> > > would
> > > >   like the caps to be secure and not have the ps
> > > become a fire
> > > hazard
> > > >   waiting to happen!
> > > >
> > > >   The power supply was still sitting in my truck last
> > > night. When I
> > > get
> > > >   a break today I will take it apart further and see
> > > if I can find
> > > a
> > > >   part # stamped on the diodes and caps that might
> > > indicate what
> > > the
> > > >   real part # is. While I was at the repeater site
> > > yesterday I
> > > thought
> > > >   I saw a 1N stamped on the diodes.
> > > >
> > > >   I would have thought that there would have been
> > > someone here on
> > > the
> > > >   list that has repaired one of these supplies before,
> > > so that is
> > > why I
> > > >   asked.
> > > >
> > > >   Eric
> > > >   KE2D
> >
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

[Repeater-Builder] Duplexer

[Glenn Little WB4UIV]

I have some copper pipe that is 6 inches in diameter and about 60 inches long.
This came from the filters on a 25 Kw channel 4 TV transmitter.
Would these work for a 6 meter repeater?

I am thinking that they are a little short in both length and diameter.

The feedline for the TV transmitter was 6 inch rigid line at 75 Ohms.

I will either make these into a duplexer (is they are suitable) or 
scrape them for their value as copper.

Thanks
73
Glenn
WB4UIV

Re: [Repeater-Builder] Tower lighting on 200 foot tower - maybe off topic

[Glenn Little WB4UIV]

The FAA requires lights on towers at 200 feet and above. In some 
cases, due to distance to airports, the FAA may require lights on a 
shorter tower.

The FCC is the enforcement arm for the FAA for tower lights.

I suggest that you read Title 47 part 17 to determine the 
requirements for tower lights in your situation.

Is the tower registered? The property owner could be held responsible 
for the fines.

Before I took possession of the tower, I would insist that the tower 
be lowered to the point that it no longer requires lights.

The rules may have changed over the last few years. I used to work 
for a company that did tower site monitoring equipment and was, at 
one time, quite up to date on the rules.

Just make sure that if you do take possession of the tower that you 
are not liable for past or pending fines.

73
Glenn
WB4UIV



At 08:04 PM 6/29/2008, you wrote:
>To all,
>I know that a 200' tower requires lighting, however my question
>concerns the tower having been abandoned for some years, maybe 10 or
>so, without lights or power to the site.  If assuming the lease on this
>site (from the state)is there any particular rules that apply under
>this circumstance?  In order to get around the tower lighting
>requirement, then, would it be more prudent to remove 10 or 20 feet of
>tower and not then have to worry about.  On the other hand I seldom
>ever recall the light ever being on, even when it should have been
>working, and this over 30 years or so.
>
>Thanks,
>Steve KB3FPN
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] ROSIN banded in Canada custom?

[Glenn Little WB4UIV]

Rosin is made from pine tar. It is organic, not man made. I do not 
know why you would want to impregnate a transformer with this. Do you 
possibly mean that you want to impregnate it with tar??

Your friend google will lead you to a source for your rosin.

73
Glenn
WB4UIV


  At 08:54 PM 3/30/2008, Camilo So wrote:

>I know its OT but it have something to do with repeater, I use to 
>rewind my own Transformer 40 years ago, now I have to rewind an old 
>Standard RPT power transformer,"urn:schemas-microsoft-com:office:office" />
>
>But I need to impregnate the transformer in wax that need ROSIN, and 
>have a friend going to Canada Toronto, they said that Canada Banded 
>rosin to inter "urn:schemas-microsoft-com:office:smarttags" />Canada soil?
>
>The reason "Canada" because the guy is going to visit his son, and 
>the son is a ham radio friend of mine, he said he'll mail it from 
>Canada to USA for me,
>
>I know the rosin was use by musician for the violent use, and the 
>priest use it in the church,
>
>Any reason this is banded? If I use varnish for the dipping of the 
>transformer, it's hard to take the transformer apart when it need to 
>rewind for the next time.
>
>hope some one can tell me how to bring or buy rosin at a reasonable 
>cost, the amount needed is about one kilogram. Thanks to all in this groups
>
>
>
>w4cso
>

Re: [Repeater-Builder] For sale: Icom IC-900AE Service manual

[Glenn Little WB4UIV]

Is this the same manual ?




73
Glenn
WB4UIV

At 10:00 AM 3/30/2008, n4irs wrote:
>I have a VERY good condition Icom 900 service manual.
>The manual covers all the RF modules:
>UX-19A/E, UX-29A/E, UX-39A/E, UX-49A/E UX-129A/E
>Plus interface A and interface B.
>
>Includes schematics, logic diagrams and complete data format
>information.
>
>If you have a IC-900 remote base this is the manual you need!
>
>$50 PayPal or MO.
>
>73, Steve N4IRS
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Tower Installation labor rate?

[Glenn Little WB4UIV]

I just got a quote today for $1360.00 to climb a monopole. This is $85.00 
per hour for an 8 hour day for two climbers. The tower crew is a 2.5 hour 
drive away and they would charge us for the full day as we would kill the 
day for them.

If they were in the area (which they often are) and are doing work for 
another client, they would charge us for one way travel and the other 
client for one way travel plus the hourly rate for the work done.

It does not seem to make a difference to them as to how high they have to 
climb. The same rate for an elevator ride to 2000 feet as a climb to 150 feet.

73
Glenn
WB4UIV



At 08:08 PM 01/08/08, you wrote:
>Guy's, anyone know what the current hourly wage that tower maintenance 
>types charge?
>
>73 de Jack - N7OO
>
>

Re: [Repeater-Builder] Re: Off Topic (but with on topic questions):NTIA propaganda

[Glenn Little WB4UIV]

The numbering of the digital channels is to help the people that know 
nothing of TV past turning it on and changing channels. The station that I 
work for is channel 4. Our digital transmitter is on channel 34, but, the 
viewers know it is 4-1. That way they do not get lost in the channels. I do 
not know of any of the sets that display the real digital channel. I guess 
that some may, if, you really dig into the menus.

So for now, the viewers of analog channel 4 know the digital channel as 4-1 
and not the real channel of channel 34.

As far a new digital channels, all bets are off. You will have to ask the 
lawyers at the FCC as they no longer have many technical people on staff. 
They have found it a much more lucrative business of selling commodities 
that they do not own than helping to further the use of the RF spectrum. 
Look at the mess that allowed Nextel to get away with.

We will see what happens when the analog channel turn off date passes.

73
Glenn
WB4UIV


At 08:11 PM 01/06/08, you wrote:
>Many of my local channels are using tags that have the ANALOG channel
>name. For example, while KDKA TV-2 DTV is on channel 25, the tag is 2-1
>which is what you enter to see that channel. Either they are going to
>move back to channel 2 or things are going to get even more confusing if
>you have a channel 25 station you have to enter 2-1 when there is no
>channel 2. What happens when a DTV channel 2 comes along (if that should
>ever happen)?
>
>4 (I forget their DTV channel) is using 4-1 and 4-2. 11 is using 11-1,
>11-2, and 11-3.
>
>Joe M.
>
>Ben wrote:
> >
> > Here is a good list of what the channels will be like when the analog
> > shuts off:
> > http://www.w9wi.com/dtvch/dtvch.html
> >   Many are going back to their original VHF channel. Here in Bowling
> > Green, KY it looks like channel 13 will turn off their digital that
> > is on 33 now and stay on the old analog channel 13 as DTV. In
> > Nashville channels 4,5 & 8 will stay on VHF.
> >
> > If you haven't tried to rx DTV yet it's time you did. I can watch
> > channels now in studio quality that in analog are almost unwatchable
> > by todays standards. HD signals are very nice too! It's easy to pick
> > these channels up with the antenna you have up now and the cost is
> > just going to do down from here. All TV's sold today are required to
> > have DTV tuners. Go to Walmart and look.
> >
> > Several channels in Nashville are running up to 4 or more services on
> > one channel. Here in Bowling Green Channel 40-1 is NBC, 40-2 is CBS,
> > 13-1 is ABC, 13-2 is FOX, 13-3 is UPN(or what ever they call
> > theirselves today), 53-1 to 53-6 are Kentucky Educational Television
> > channels. They run PBS HD on 53-4...so many stations are broadcasting
> > more than one service in that 6 MHz.
> >
> > Ben
> > W4WSM
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Wow!!! only $449!!!!

[Glenn Little WB4UIV]

And that handheld looks a lot like the Repco unit I went to school on. It 
was either their 10-8 or 10-2 series. Repco sold these under a lot of 
different names. They could not sell them under their own name due to 
contract with the buyers.

These sold under the RCA, Aerotron, Wabco and about 200 others.

73
Glenn
WB4UIV

At 01:15 PM 12/25/07, you wrote:
>Ken Arck wrote:
> > Ooops, dropped a "2" from the Ebay item number. Here's the correct one
> >
> > 280185868722
> >
> > Ken
>
>
>Guy also has an old Aerotron handheld he's trying to sell as an
>"AEROTRON FM VHF BASE STATION RADIO".
>
>|cP
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Does anybody have the ARRL QST CD for 1975 ??

[Glenn Little WB4UIV]

Mike

I have the file.  Where can I send it?

73
Glenn
WB4UIV

At 05:20 AM 12/12/07, you wrote:
>If so, we'd like to add to the DB-4048 page
>
>the PDF file for the Product Review article for the DB Products
>DB-4048 duplexer from the June issue.
>
>Mike WA6ILQ
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] TLN 5731A - Tone "Private Line" Encoder

[Glenn Little WB4UIV]

The 1A is an EIA designation.

See 

Google is your friend. Searched for CTCSS Frequency EIA.

73
Glenn
WB4UIV



At 05:58 PM 11/28/07, you wrote:
>Our Uhf Micor has a  '1A'  KLN6210A. What frequecy is 1A? I would like to 
>change this to a 114.8.
>
>I was hoping to find a list of all the tone reeds with the corresponding 
>range from 67 - 210; in my Uhf Micor manual.
>
>I thought of looking on the Repeater-Builder web pages. Though out all 
>this looking, I have yet to find a list.
>
>
>Thanks, for the Micor PL Encoder modifications, which I will add to our Micor.
>
>73's,
>JimKh6jkg.
>
>
>
>--
>More new features than ever. Check out the new 
>AIM(R)
> 
>Mail!
>

RE: [Repeater-Builder] Re: duplexer isolation and reciever noise bud

[Glenn Little WB4UIV]

We had a 1500 watt 70 MHz circulator go bad. I disassembled it to see what 
failed. IIRC there were 9 capacitors and at least 3 inductors along with 
the ferrite ant tuning magnets. Really makes a TV transmitter quit when the 
circulator between driver and final fails. Quite a site to see the 
capacitor that blew apart and burned from the plasma.

Not all circulators are ferrite only.

73
Glenn
WB4UIV

At 12:08 PM 10/24/07, you wrote:
>At 10:10 AM 10/23/2007, you wrote:
>
>
> >No, it's not linear. First off, it doesn't satisfy the superposition
> >principle since it will produce harmonic when fed by a pure sinusoid carrier
> >(hopefully we can agree to that without added discussion), so right off the
> >bat it's nonlinear. Furthermore, it's also non-reciprocal; what enters port
> >1 exits port 2 with little loss, but the converse is not true.
>
><---I though it was linear unless it becomes saturated. Circulators
>are ferrite devices and as long as the ferrite core isn't saturated,
>it remains linear.
>
>Ken
>(back to Circulator 101 class I guess)
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Re: duplexer isolation and reciever noise budget

[Glenn Little WB4UIV]

145.25 can be a real pain. We have a repeater on that frequency. It is CATV 
channel E. We always have leaks from the cable rendering the repeater 
useless in some areas until a call is made to the CATV plant. They go out 
and tighten the screws on an amplifier (left loose by the last tech working 
on it), replace a damaged section of hardline or tighten up some connectors 
that worked loose due to temperature variations. It is a never ending battle.

The major CATV plants here have offset from 145.25 as they have to do for 
the FAA when using some of the channels in the aviation band. That helps 
until the leakage gets real bad. The minor players, the apartment complexes 
and motels just do not care and will not offset. There is always leakage 
from CATV.

73
Glenn
WB4UIV



At 09:17 AM 10/24/07, you wrote:

> >> OK - Here are my requirements for the transmit chain. minimal
> >> physical space and minimal insertion loss :-) (ok - too
> >> bloody obvious) Tuning simplicity is also a factor. I'm
> >> combining 3 transmitters at 144.39, 145.05 +/- 0.04 and 145.25
>
> >> Can you list out some of the other options that I might be
> >> able to squeeze onto my trailer ??
>
>You're trying to do all this in a trailer?
>Forget it, put up separate antennas for each radio and live with the
>desense.
>Not unless you feel like spending 10's of thousands of $.
>
>Went back and looked again, the 145.25 is to be a REPEATER??? Dude, hang
>it up. Put the repeater on UHF and be done with it. Anything else is
>ASKING for trouble. And put the other two on separate antennas and live
>with it. You'll spend thousands of dollars and hundreds of hours making
>this work and *KEEPING* it working!
>
> > I've run into some hitches getting a UHF backyard pair, or I would move the
> > repeater to UHF in a heartbeat -- already have the duplexer for that, and
> > that would leave me with a pretty standard BP/BP duplexer setup to separate
> > the simplex radios, and would additionally get me back on a single antenna.
>
>Hogwash. 2M is FAR tougher to get a pair on then UHF. Unless you live in
>one of the areas that UHF is getting taken out by mil radar, I guarantee
>there is a pair available on UHF somewhere. In the *REALLY* strange
>event there isn't, I GUARANTEE there is no pairs on 2M either.
>
>Find something like, oh, say, 444.0125 for instance, something where
>there isn't a nearby repeater on either side, keep the deviation down to
>+/-4KHz max, and you'll be fine.
>--
>Jim Barbour
>WD8CHL
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Mocom 10 info?

[Glenn Little WB4UIV]

The TLD tells me it is VHF (132-174 MHz) but I cannot tell you if it is 
132-150.8, 150.8-162 or 162-174. I may be off on the 162, but the split is 
about there. The 2 in 8652 tells me that it is probably in the second 
split, 150.8-162.

Look at the frequencies on the channel elements.

73
Glenn
WB4UIV



At 10:43 PM 07/12/07, you wrote:
>Can anybody ID what band and split a Mocom 10 with chassis model TLD8652A2
>is?  Apparently the model number plate was on the case (missing), not the
>heatsink, so the seller can't ID it.
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] crystal/channel element compensation..

[Glenn Little WB4UIV]

The last time I checked with Bomar, they put a crystal into the element, 
ensured that it worked and modulated correctly then send it out the door. 
It never went through temperature compensation.

They may have changed.

73
Glenn
WB4UIV

At 05:55 PM 07/10/07, you wrote:
>OK, I usually use International, but how is Bomar doing these days,
>quality-wise? ICM seems to be pretty pricey these days. Bomar says $35
>for re-crystalling a channel element. (I assume that means
>compensating as well). Thoughts welcome..
>
>na6df dave
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Line Stretcher

[Glenn Little WB4UIV]

WE also use a line stretcher in TV. When you have two UHF PAs that are fed 
to a combiner, it is very important that the phasing of the signals be 
correct. We use a line stretcher in the output of the exciter to the 
closest PA to effectively place the PAs at the same electrical distance 
from the exciter. This gets the phasing correct into the combiner. When 
dealing with 25KW PAs, a little phase difference makes for a lot of loss in 
signal in the combiner.

73
Glenn
WB4UIV

At 05:09 AM 06/30/07, you wrote:
>Ian, I owe you an apology for my comment about striped tower paint in
>response to your 'Line Stretcher' post.  I never thought of using such a
>tool on a short line between a transmitter and duplexer.  I was thinking
>such was used in AM broadcast delay lines with phased towers, and never
>though of using such to correct such minuscule variations as might be
>found in a VHF or UHF duplexer and it's connection to a radio
>transmitter.  I wonder how many dB of improvement might be achieved
>optimizing such minor differences and what kind of a jump in S Meter
>readings folks on the receiving end might realize?
>
>73, Steve NU5D
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] MSR 2000 repeater NFM conversion

[Glenn Little WB4UIV]

The receive IF filter will have to be changed and the transmitter deviation 
changed. There are kits to change the filters. This would probably not be 
type accepted for commercial narrow band use. It would be fine for services 
that do not require type acceptance, ie amateur radio.


73
Glenn
WB4UIV


At 05:00 PM 06/19/07, you wrote:
>Greetings to the group.
>
>I have an MSR 2000 repeater.  It is vhf and currently wide band (15
>KHz).  It is using channel elements T KXN1095A and R KXN1112AA.  I have
>read that there is conversion to make this NFM (5KHz) spacing.
>However, I can't seem to find this now.  Any information would be
>greatly appreciated.
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Re: Would You..... tower height question

[Glenn Little WB4UIV]

If far enough from an airport, 200 feet. If close to an airport, it 
requires a determination by the FAA.

If greater than 200 feet or within a boundary as specified by the FAA, the 
tower has to be registered. As part of the conditions of registration, the 
FAA will specify what the lighting scheme will have to be.

To keep a tower unpainted and use white strobes for day and night marking 
requires a further study by the EPA to ensure that wildlife are not 
affected by the lights.



73
Glenn
WB4UIV

At 09:04 AM 06/17/07, you wrote:
>What is the maximum height a tower can be without falling under all
>the lighting, painting etc. regulations?
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Re: Would You Do This?

[Glenn Little WB4UIV]

The reason for tower registration by the tower owner is to have someone 
responsible for the vertical real estate.

A fine was imposed on Motorola due to a dark tower a year or so after a 
Hurricane Andrew destroyed Southern Florida. Motorola attempted to push the 
fine off on the tenants. The FCC said no (Motorola's under the table 
insurance policy had expired), that Motorola was responsible for the tower. 
Motorola shortly after this sold all (or at least most) of their vertical 
real estate and the FAA/FCC started the tower registration program.

All lighted towers are required to be registered. The registration names 
the entity that owns the structure and who is solely responsible for the 
proper maintenance of the tower markings. Until towers were registered, a 
crafty lawyer could divert the fine from the owner to the tenant.

At least this is how it was when I was working with tower site monitoring.

73
Glenn
WB4UIV



At 07:27 PM 06/16/07, you wrote:
>While this is true, ANYONE at the site can be fined for non-compliance -
>even a ham radio group who is prohibited from climbing the tower or
>making repairs. It doesn't matter who owns the tower anymore. It used to
>be that only the tower owner was responsible. Now, everyone at the site
>is.
>
>Joe M.
>
>Glenn Little WB4UIV wrote:
> >
> > If so the tower owner must ensure that the lights are maintained and
> > operating properly.
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Re: Would You Do This?

[Glenn Little WB4UIV]

Tower ownership can be very costly.

Does the tower require lights?

If so the tower owner must ensure that the lights are maintained and 
operating properly.

I think FCC rules part 73 cover tower lights. IIRC, an outage must be 
repaired within 30 minutes or be reported to the FAA. The clock starts 
here. You have a short period of time to fix the lights, something like 30 
days.

The painting of the tower is important, if required. The FAA has paint 
"fade charts" to ensure that the paint is the proper shade. The proper use 
of these charts ensures that the tower is painted at the proper intervals.

I was an engineer for a company that made tower site monitoring equipment 
and got to know the rules pretty good, but that was a few years ago.

73
Glenn
WB4UIV


At 03:27 PM 06/16/07, you wrote:
>Up until a few months ago, it was owned by AT&T, then it was bought by
>a private individual that is using it mainly for a storage building
>and nothing else.
>
>But, we may be in a posistion to use the tower as our own, or possible
>be able to purchase it all.
>
>We are looking into all of our options.
>
>--- In Repeater-Builder@yahoogroups.com, mch <[EMAIL PROTECTED]> wrote:
> >
> > Who owns it now?
> >
> > Joe M.
> >
> > Christopher Hodgdon wrote:
> > >
> > > I have a question that I would like to throw out to the group.
> > >
> > > I have read some items on this, but would like to gather opinions from
> > > members of the group.
> > >
> > > This is something that has been brought up to me.
> > >
> > > If you had the opportunity to install your repeater antenna on a
> > > former AT&T Tower would you do it, if not why?
> > >
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> >
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] crystal / pll conversion

[Glenn Little WB4UIV]

Call ICM, send them the ICOMs, they will make the crystals for you.

73
Glenn
WB4UIV

At 01:02 AM 06/06/07, you wrote:
>I need to change the crystals on the repeater bought from junkyard but
>unfortunately I can not find the new set of receive crystals for the
>amateur band.
>
>Can somone direct me to a starting point , for "How to replace the
>crystals for VHF band with the cheap and simple PLL's.
>
>Any web adress or document is appreceated.
>
>Thanks,
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Coax length between the TX and diplexer

[Glenn Little WB4UIV]

The only time that you need specific lengths of cable between pieces of 
equipment is to cover up an impedance problem. If the impedances are 
correct on the inputs and outputs of the devices that you are connecting, 
the length of the proper impedance cable is immaterial.

73
Glenn
WB4UIV



At 05:39 AM 06/04/07, you wrote:
>Hi guys .I have been wondering and trying to find out the correct length 
>of coax between the diplexer and the tx.and rx and someone has brought it 
>up on another group.here is a snipit
>Is the length between the exciter -pa-TX on duplexer a quarter wavelength 
>or multiple there of. Is the rx-preamp(Is the rx-preamp(if used)-rx input 
>of duplexer the same number of wave lengths as the TX path
>So hopefully this will help answer the above enquiry.
>Thank You,
>Ian Wells,
>Kerinvale Comaudio,
>www.kerinvalecomaudio.com.au
>
>

Re: [Repeater-Builder] OT - Looking for HP scope probe ground lead

[Glenn Little WB4UIV]

Just make one. Find a short screw of the correct thread, cut a piece of 
wire to the length that you need, attach a lig on one end and an alligator 
clip to the other. The lug should be a ring type with a hole just large 
enough for the screw. Place an internal star lock washer on the screw then 
the lug and tighten to the probe.


QED

73
Glenn
WB4UIV

At 04:49 PM 04/04/07, you wrote:
>I have an HP RF Voltmeter that has no ground lead, so
>I'm looking for one.
>
>The side of the probe has a spot with a machine-screw
>thread tapped into it, which will accept a ground
>lead. I would guess it's 4-40 or smaller, and not very
>deep. I really don't care what's on the other end, but
>a thread-on alligator clip would be desirable if I
>have my choice.
>
>The omega-style clip-on ground leads that were
>commonly used on Tektronix probes will NOT fit on this
>probe.
>
>There should be some of these floating around in the
>vinyl pouches that came with scopes in the 1970s and
>1980s.
>
>Contact me privately if you have a spare one lying
>around that's taking up space.
>
>Thanks.
>
>Bob M.
>
>
>
>
>Don't pick lemons.
>See all the new 2007 cars at Yahoo! Autos.
>http://autos.yahoo.com/new_cars.html
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] 220 conversion

[Glenn Little WB4UIV]

If your really meant what you asked, conversion to subaudiable frequencies, 
220 milliHertz, the conversion would be very difficult.

If you really meant 220 MHz, the conversion should be very similar to any 
other radio. Basically you have to convert the front end by reresonating 
the coils at the new frequency. Change the multipliers to get the proper 
injection frequency and level. The transmitter exciter can be changed by 
reworking to multipliers to get the desired frequency to a final. The final 
would have to be removed and replaced with either a home built PA or a PA 
module for the correct frequency.

The PA cannot be changed in frequency far enough to get to the new band as 
the transistors would be operating too far outside their frequency range.

The conversion is pretty straight forward and doable by someone with a good 
understanding of FM transmitters and superhetrodyne receivers.

I know of no cookbook method to do the conversion. One may exist, but I am 
not aware of it.

All the best on the conversion.

73
Glenn
WB4UIV



   At 06:19 PM 03/21/07, you wrote:
>Has anyone tried to do a 220 mhz conversion on the Mitrek?
>

Re: [Repeater-Builder] astron rs 35a

[Glenn Little WB4UIV]

The pass transistors are shorted, unless lightning shorted the rectifiers. 
Hopefully the fuse was correct and blew before the transformer was damaged.

73
Glenn
WB4UIV

At 07:17 PM 02/28/07, you wrote:
>my power supply keeps blowing the fuse
>changed the pc board
>i dont know where to go nent
>any help is apperacited
>thanks
>kd5ntp
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Micor Ribbon Cable

[Glenn Little WB4UIV]

I have been told that this is a known problem. The fix is to use a unified 
chassis. I may be able to hel;p you with a unified chassis.


73

Glenn
WB4UIV


At 01:58 PM 02/14/07, you wrote:

>We have a VHF Micor and during cold weather like we have now, we loose
>the audio level and it seems that our RF ouput is down. I go to the
>site. power off the Micor, reseat the 50 conductor ribbon cable on the
>back end of all three chasis, and all seems to be better for a while.
>But it returns.
>
>Has anyone experienced this before, and how did they resolve it?
>
>Thanks
>Steve
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Icom Repeater Repair fun... (parts hunting)

[Glenn Little WB4UIV]

Replace the noisy PLL LO with a quiet crystal LO. Easy surgery, better 
noise figure on receive and less phase noise on transmit. You probably have 
no need to have an agile receiver.

73
Glenn
WB4UIV
ARRL Technical Specialist


At 01:26 AM 02/12/07, you wrote:
>Well...
>
>I've got an Icom IC-RP2210 (220MHz) Repeater here with a dead
>receiver.  The PLL is crap and it's not the first time I've heard
>about this problem. Even more no-fun is the NEC PLL and Prescaler
>chips are no longer available.
>
>Anyone ever find a replacement parts source for the pll uPD2834c
>and pre-scaler uPB571c chips?
>
>and/or...
>Anyone got a dead Icom Repeater Receiver they want to sell as a
>parts unit?
>
>What is everyone else doing with these repeaters if we can't get
>the parts to fix them?
>
>What are the next six lotto numbers for the CA. Lottery? (never mind
>this one).
>
>your turn,
>skipp
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

[Repeater-Builder] Motorola Permakay filters

[Glenn Little WB4UIV]

I have some, what look to be new, Permakay filters that I do not need.
There is one TU540S, one TFN6022AS, one TFN6013AS and one TFN6000AS.
I would like to get $5.00 each or $15.00 for the lot plus shipping.

Thanks
73
Glenn
WB4UIV

Re: [Repeater-Builder] Re: coordination question for the seasoned owners

[Glenn Little WB4UIV]

Per §97.205 Repeater station.


(c) Where the transmissions of a repeater cause harmful interference to 
another repeater, the two station licensees are equally and fully 
responsible for resolving the interference unless the operation of one 
station is recommended by a frequency coordinator and the operation of the 
other station is not. In that case, the licensee of the noncoordinated 
repeater has primary responsibility to resolve the interference.

As you can see, there is no mention of a repeater operating prior to the 
existence of the coordinator. At the inception of the coordination body, 
existing repeater owners were requested to coordinate their repeater. If 
they elected not to coordinate the repeater, all was well, until, the 
coordinator coordinated that frequency to a new owner. Then the 
noncoordinated repeater had to leave the air or explain to the FCC as to 
why they were causing interference to a coordinated repeater.

73
Glenn
WB4UIV


(At 10:57 PM 01/19/07, you wrote:
>In a message dated 1/19/2007 7:23:19 P.M. Pacific Standard Time, 
>[EMAIL PROTECTED] writes:
>You ARE aware that if someone else gets coordination there and the FCC
>gets involved, you *will lose*, right? You are better off taking the
>issue to their meetings to get it resolved. If you feel they have
>violated their published policies, bring that up and demand an
>explanation.
>
>
>Says who? No repeater trustee is obligated to coordinate his/her repeater 
>with a coordinating group.
>Many repeaters pre-date the formation of an area coordination group. If 
>the repeater is operational,  any repeater, coordinated or otherwise that 
>significantly interferes with a pre-existing operating repeater is in 
>violation of FCC rules. Coordinating a repeater is a voluntary act. There 
>is no regulatory requirement to do so. Show me some language in part 97 to 
>the contrary.
>

Re: [Repeater-Builder] FYI: FCC officially issues R&O dropping code requirement today

[Glenn Little WB4UIV]

It is now just a matter of time. The problems with hams not understanding 
what they are doing will increase. Interference will increase. Commercial 
interests will petition the FCC for the frequencies. The hams will not be 
able to defend their desire to keep the frequencies. Now the ham 
frequencies will be sold to the highest bidder.

The handwriting is on the wall.

Less that 10% of the newly licensed hams can draw a simple block diagram of 
the radio that they use.

Just my opinion, based on my observations.

73
Glenn
WB4UIV


At 11:25 PM 12/15/06, you wrote:
>Is it a little early for April Fools jokes?
>Will 10 meters become the next CB band?
>I will wait and see what happens here...
>
>  73
>  Mike - N7ZEF
>
>Subject: Re: [Repeater-Builder] FYI: FCC officially issues R&O dropping code
>requirement today
>
>
>Oh well, the end of an era. Boo-Hiss.
>
>Bob M.
>==
>--- Joe Montierth <[EMAIL PROTECTED]> wrote:
>
> >
> >
>http://hraunfoss.fcc.gov/edocs_public/attachmatch/DOC-269012A1.pdf
> >
> > Techs get tech+ privs, code test gone for general
> > and
> > extra.
> >
> > Joe
>
>__
>Do You Yahoo!?
>Tired of spam?  Yahoo! Mail has the best spam protection around
>http://mail.yahoo.com
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Newbie Information Time - Mystery Signal

[Glenn Little WB4UIV]

IIRC QC was RCA trademark and CG was GE trademark for CTCSS. Johnson used 
ToneGuard for their trademark.

73
Glenn
WB4UIV

At 05:39 PM 12/15/06, you wrote:
>I always thought it was known as "QC" for Quiet Channel or "CG" for Channel
>Guard.
>
>
>
>-- Original Message --
>Received: Thu, 14 Dec 2006 10:43:53 AM CST
>From: [EMAIL PROTECTED]
>To: Repeater-Builder@yahoogroups.com
>Subject: [Repeater-Builder] Newbie Information Time - Mystery Signal
>
> >
> >I guess it is time again for a bit of clarification for the
> >   apparent newbies:
> >
> >PL ... is a registered trademark of Motorola Inc. properly
> >   known as Private Line.
> >
> >A very polite way of saying the same thing here is
> >   Continuous Tone Coded Squelch System or CTCSS.
> >
> >The following is for all but specfically Mike Morris as well:
> >The reference to hz is also incorrect ... as is an abbreviation
> >   of Hertz, a persons last name.  Specifically should be Hz.
> >
> >In my opinion, is a slight flaw in the voice operation on
> >   144.39 MHz below ... the FCC requires you to monitor the
> >   frequency in a non-CTCSS mode prior to transmitting.
> >   And, if you have your 144.39 MHz receiver locked up on
> >   CTCSS decode, your receiver won't hear the packet
> >   operations ...
> >
> >Thank you for your time,
> >Neil McKie - WA6KLA
> >
> >
> >
> >
> > - Original Message -
> > From: Max Slover <[EMAIL PROTECTED]>
> > Date: Wednesday, December 13, 2006 4:58 pm
> > Subject: Re: [Repeater-Builder] Mystery Signal
> >
> > > In case I confused anybody, this is what I am refering
> > > to with APRS and a 100hz tone ---
> > >
> > > VOICE ALERT:  This simply means that you do not turn
> > > the audio down on
> > > 144.39, but instead leave it at high volume and then
> > > simply set CTCSS
> > > tone 100 to mute the speaker.  This way, you dont hear
> > > any packets, but
> > > ANYONE can call you with VOICE on 144.39 to alert you
> > > by using PL 100.
> > > You will rarely use this, and only use it to tell
> > > someone to QSY to another
> > > voice channel, but it is one way of assuring that
> > > ANYONE running APRS in
> > > simplex range of you can ALWAYS be contacted with a
> > > voice call...
> > >
> > > You wont hear any  packets except maybe one or two
> > > when another VOICE-
> > > ALERT mobile is in range (about 3 miles or so).  But
> > > even then, he is only
> > > beaconing once every 2 minutes and so it is not
> > > bothersome at all..
> > > In fact, it is nice to hear when someone is nearby!
> > > Its like a free radar
> > > for other mobile APRS operators that are in simplex
> > > range AND listening.
> > >
> > > ---
> > >
> > > --- Max Slover <[EMAIL PROTECTED]> wrote:
> > >
> > > > Doh, this just hit me. It would most definitely be
> > > > an
> > > > APRS setup due to the 100hz subtone. In APRS you set
> > > > the subtone to 100 so you can do voice alert. Man,
> > > > why
> > > > didn't I think of that part when this was first
> > > > mentioned.
> > > >
> > > > Sorry for being a bit late on that but I figured I'd
> > > > toss my 2 cents on this.
> > > >
> > > > Max...
> > >
> > >
> > > Public Information Officer -- St. Louis & Suburban Radio Club
> > > K0AZV - Amateur
> > > WPWH-650 GMRS
> > > St. Louis County ARES
> > > St. Ann MO EM48tr
> > >
> > >
> > >
> > >
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> >
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: FW: Read: [Repeater-Builder] Stuck cores

[Glenn Little WB4UIV]

How fast are the cores moving that they require braking? Must have to slow 
them down so that they will not break with the tuning tool.

73
Glenn

At 09:04 PM 12/08/06, you wrote:
>Well you all showed that you're computer experts, now can you
>get back to the topic and tell me if anybody have a way to
>safely "unloose" stuck cores without braking the cores???
>
>I will be interested to read your reply on this one!!!
>
>73, Michel
>
>
>
>
>--- In Repeater-Builder@yahoogroups.com, Ken Arck <[EMAIL PROTECTED]> wrote:
> >
> > At 05:56 PM 12/6/2006, you wrote:
> >
> > >I don't know what this is, but I don't think I sent this message...
>Maybe
> > >someone is spoofing my address.
> >
> > <---Personally, I think anyone who runs MS Outlook should be drawn
> > and quartered and their remains fed to zoo animals while their family
> > members are required to watch and provide the ketchup
> >
> > I'm sorry and apologize if that offends anyone. I know I'm not being
> > tough enough on 'em..
> >
> > Ken
> >
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

[Repeater-Builder] Motorola channel elements

[Glenn Little WB4UIV]

Can anyone tell me what radios the following channel elements are for?

KXN1007A
K1049A
KXN1013B
KXN1043A
KXN1006A
KXN1049A
K1040A

Thank You
73
Glenn
WB4UIV

Re: [Repeater-Builder] Help in identifying

[Glenn Little WB4UIV]

I work at a TV station that uses a Harris TV30L channel 4 TV transmitter. 
It has a circulator between the visual driver and PA. It is deeper that the 
one that you describe, but it uses type N fittings and is in the 70 MHz range.

The connector indicates quality in this case.

 From the size, I would suspect 150-160 MHz range.

Is there a way to retune these to a more useful frequency?

73
Glenn
WB4UIV

At 06:32 PM 11/28/06, you wrote:
>I have what I believe is a circulator/isolator that I would like to
>identify.
>
>It is "big and heavy", meaning it measures 13"W x 4 5/8"H x 1 7/8"D, and
>weighs about 15 lbs.
>
>The label says: "Microwave Associates, a M/A Com company"
>  Serial: 1009
>Model J-210
>
>It has three ports, one marked INPUT another marked OUTPUT and a third on
>the "bottom" with the marking obliterated.  Next to the unknown port are two
>other studs that look like solid ports with the center conductor soldered.
>The connectors are "N" type, which leads me to think its UHF maybe...
>
>Any way of knowing for sure?  There was a paper label which has deteriorated
>over the years and is now nearly illegible.  Looks like is says either 160
>or 460 MHz, the rest is completely unreadable.
>
>I can provide photos upon request.
>
>Thanks,
>Mark - N9WYS
>
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] First repeater and need some info

[Glenn Little WB4UIV]

The very first thing that you need is a Radio Amateur Handbook. Read it and 
get help understanding how transmitters and receivers work.

The next thing that you will need is a service manual on the radio that you 
are working on.

You will need test equipment, Oscilloscope, Signal Generator and Multimeter 
as a minimum,  so that you can inject signals to see where your problem is.

You have a lot of work ahead of you.

73
Glenn
WB4UIV



At 03:21 AM 11/25/06, you wrote:
>I have just received a Motorola Micor Compastation repeater that had
>been used for a repeater on 147.220.  This repeater was hit by
>lightning and apparently did not work.  It is now my project.
>
>As I was looking through it tonight for the first time, I found that
>it powers up but did not receive.  When I took the receive board out
>I found it did not have a xtal.
>
>I then took the receive board out of a micor base station (not a
>repeater) and used its receive xtal (153.830) which is my fire
>departments tac channel and tested to see if it received.  Magic...it
>received on the 153.830 and transmited on the 147.220
>frequency...problem is,,,no audio, only a carrier!  There is a local
>speaker on it wired in after the fact and I can hear myself on it,
>but no audio is being transmitted.
>
>Anybody have an idea of where I go next?
>
>I am an absolute first time builder and no nothing!
>
>Oh, since the addition of the other receive board, I think I will
>probably need to have this changed so it will do 2m instead of the
>150 range?  Is this correct?
>
>Well I am looking forward to the learning experience but I can see a
>lot of time involved ahead...your help will be much appreciated!
>
>Thanks
>
>W7DUX
>Dan
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Receiver crystal filter

[Glenn Little WB4UIV]

What bandwidth? What insertion loss?

A 150 MHz xtal filter with 6 KHz BW has about 11.5 dB insertion loss.

A 140 MHz xtal filter with 40 KHz BW has about 5 dB insertion loss.

See 

73
Glenn
WB4UIV

At 04:19 PM 11/19/06, you wrote:
>Any recommendations for a receiver crystal filter for 2M or 440
>repeater application?
>
>Thanks, John/N4SJW
>
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] RE: Need a Motorola Publication...

[Glenn Little WB4UIV]

R-56 should still be available from Motorola. I used it as a reference when 
I did design of tower site monitoring equipment. I had to specify grounding 
requirements. The book and / or CD is not cheap ( the same as anything else 
with Motorola on it). It is a good reference. MIL-HDBK-419 volumes one and 
two are also a very good reference. These are available on the web for free.

73
Glenn
WB4UIV

At 10:08 PM 06/01/06, you wrote:

>   ... forwarded ...
>
>   Can anyone assist here?
>
>
> >Neil,
> >
> >I'm looking for a Motorola publication called the "R56 Handbook,"
> >which deals with RF grounding systems.  While all bonded together
> >in the end (as per NEC), the RF grounding system is not to be
> >confused with lightning protection and standard electrical system
> >ground.
> >
> >This is not a Polyphaser deal, but a MOTOROLA publication, which I
> >understand is also available in CD ROM format.
> >
> >Thanks, Neil!
> >
> >
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] Need source for RF RCA connectors

[Glenn Little WB4UIV]

There should be a difference in the dielectric quality. In audio any old 
dielectric will be fine as the upper frequency to be passed is 20 KHz or 
so. For RF you need a better dielectric to cut down on attenuation.

73
Glenn
WB4UIV

At 07:55 AM 05/28/06, you wrote:
>OK, so how is an RF RCA connector different from a
>regular RCA connector?
>
>I do know I've seen them with shorter-than-normal
>center pins; I have one short cable with an SO-239 on
>one end and a short RCA plug on the other that came
>out of either an old tube GE or Motorola radio. The
>old Sensicon receivers had an RCA jack for the RF
>input, and as I recall there was something at the
>bottom that prevented a full-length RCA plug from
>fully seating itself.
>
>If that's the only difference, maybe you could just
>grind the center terminal down after soldering it.
>
>Bob M.
>==
>--- [EMAIL PROTECTED] wrote:
>
> > My stock of RF RCA connectors (the ones used for
> > carrying RF inside GE
> > MVPs, Mastr IIs etc.) has run dry, & I haven't seen
> > any at our local swap
> > meets.  Anyone know where I can find these?  Thanks.
> >
> > Bob NO6B
>
>__
>Do You Yahoo!?
>Tired of spam?  Yahoo! Mail has the best spam protection around
>http://mail.yahoo.com
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] Power Supply

[Glenn Little WB4UIV]

The third hit was <http://www.rfparts.com/misctran.html>

I made a mistake in my post, I stated Richardson Electronics had the part, 
it is in fact RF Parts.

The fifth and last hit gives a foreign (to USA) reference. The translated 
URL is
<http://translate.google.com/translate?hl=en&sl=fr&u=http://www.abcelectronique.com/forum/archive/index.php/f-1-p-20.html&prev=/search%3Fq%3DSO565J%26hl%3Den%26lr%3D%26sa%3DG>

Line number 4821 (the lines are numbered) is a URL. That URL brings you to 
a discussion about the part. This is where I got what little specs that I 
posted.

Kinda a convoluted way to find data, but sometimes you have to gig. Not 
everything is obvious.

73
Glenn
WB4UIV



At 11:47 PM 05/27/06, you wrote:
>Links would help because I tried Googling SO565, SO565J, S0565, and S0565J 
>with no
>such positive results.
>Gary
>
>Glenn Little WB4UIV wrote:
>
> > Google shows that Richardson Electronics has the SO565J SCR. Further Google
> > shows that this is a 50V 65Amp non sensitive gate SCR.
> >
> > Any device that meets these specs would work. Astron possibly changed part
> > numbers with production runs as different parts were available and the cost
> > of these parts may have changed. I would use what ever is available at the
> > time of manufacture that was available and fit my budget. The different
> > part values may reflect these changes with production changes.
> >
> > 73
> > Glenn
> > WB4UIV
> >
> > At 11:41 PM 05/26/06, you wrote:
> > >Yeah, the RS and RM series are electrically the same however, the 
> schematics
> > >vary depending upon the year of print. I have the RS-50M schematic 
> from 2000
> > >off the RB website. I requested a schematic from the rocket scientists at
> > >Astron. What they sent is dated 1996 and the two have significant 
> differences
> > >between them not to mention a third I found elsewhere dated 1997 
> (again, some
> > >differences). I wouldn't be so concerned except the differences are in
> > >component ID's and values. I'm hoping someone has a more recent copy
> > >available-- perhaps two out of three (or four) will agree. The 
> protective SCR
> > >is shorted in mine. I can buy the part from Astron next week but I was 
> hoping
> > >to find it via Newark, Mouser, or the like. The SCR part number varies
> > >depending upon what schematic you look at but most call for a 
> "SO565J". I have
> > >not yet found the manufacturer of this part number nor a source outside of
> > >Astron.
> > >Gary
> > >
> > >mch wrote:
> > >
> > > > The RM-50M has been around for many years (at least 20). It's the Rack
> > > > Mount version of the RS-50M. So, the schematics should be the same.
> > > >
> > > > Joe M.
> > > >
> > > > Mike Morris wrote:
> > > > >
> > > > > At 05:01 PM 05/26/06, you wrote:
> > > > > >Does anyone have the schematic from an Astron RM-50M that they 
> can scan
> > > > > >and email to me? Yes, I've already called Astron. If any member 
> of this
> > > > > >list can scan and email the schematic it would be appreciated. A 
> common
> > > > > >file type like .doc or .pdf is preferred.
> > > > > >Thanks,
> > > > > >Gary
> > > > >
> > > > > Is the RM-50M one of the newer models, or did you mean the RS-50M ?
> > > > >
> > > > > If it's the RS, then look at the Astron page at 
> www.repeater-builder.com
> > > > >
> > > > > Mike
> > > > >
> > > > >
> > > > > Yahoo! Groups Links
> > > > >
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > > Yahoo! Groups Links
> > > >
> > > >
> > > >
> > > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >Yahoo! Groups Links
> > >
> > >
> > >
> > >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] Power Supply

[Glenn Little WB4UIV]

Google shows that Richardson Electronics has the SO565J SCR. Further Google 
shows that this is a 50V 65Amp non sensitive gate SCR.

Any device that meets these specs would work. Astron possibly changed part 
numbers with production runs as different parts were available and the cost 
of these parts may have changed. I would use what ever is available at the 
time of manufacture that was available and fit my budget. The different 
part values may reflect these changes with production changes.

73
Glenn
WB4UIV



At 11:41 PM 05/26/06, you wrote:
>Yeah, the RS and RM series are electrically the same however, the schematics
>vary depending upon the year of print. I have the RS-50M schematic from 2000
>off the RB website. I requested a schematic from the rocket scientists at
>Astron. What they sent is dated 1996 and the two have significant differences
>between them not to mention a third I found elsewhere dated 1997 (again, some
>differences). I wouldn't be so concerned except the differences are in
>component ID's and values. I'm hoping someone has a more recent copy
>available-- perhaps two out of three (or four) will agree. The protective SCR
>is shorted in mine. I can buy the part from Astron next week but I was hoping
>to find it via Newark, Mouser, or the like. The SCR part number varies
>depending upon what schematic you look at but most call for a "SO565J". I have
>not yet found the manufacturer of this part number nor a source outside of
>Astron.
>Gary
>
>mch wrote:
>
> > The RM-50M has been around for many years (at least 20). It's the Rack
> > Mount version of the RS-50M. So, the schematics should be the same.
> >
> > Joe M.
> >
> > Mike Morris wrote:
> > >
> > > At 05:01 PM 05/26/06, you wrote:
> > > >Does anyone have the schematic from an Astron RM-50M that they can scan
> > > >and email to me? Yes, I've already called Astron. If any member of this
> > > >list can scan and email the schematic it would be appreciated. A common
> > > >file type like .doc or .pdf is preferred.
> > > >Thanks,
> > > >Gary
> > >
> > > Is the RM-50M one of the newer models, or did you mean the RS-50M ?
> > >
> > > If it's the RS, then look at the Astron page at www.repeater-builder.com
> > >
> > > Mike
> > >
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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RE: [Repeater-Builder] LMR coax

[Glenn Little WB4UIV]

I sent the first one too soon! Too early, not enough coffee!

Your friend Google found this:



73
Glenn
WB4UIV



At 10:51 PM 04/02/06, you wrote:
>Since I see a topic on Coax I got this E-Mail from a Ham Friend
>
>  Coax AF400, just like LMR400 for $0.35/ft. from
>http://www.antennasystems.com shipped to my door for only $34.97 next day.
>
>Has anyone heard of this Coax before
>
>Happy Repeater Building
>
>Thanks Don KA9QJG
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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RE: [Repeater-Builder] LMR coax

[Glenn Little WB4UIV]

Your friend Google produced this:

At 10:51 PM 04/02/06, you wrote:
>Since I see a topic on Coax I got this E-Mail from a Ham Friend
>
>  Coax AF400, just like LMR400 for $0.35/ft. from
>http://www.antennasystems.com shipped to my door for only $34.97 next day.
>
>Has anyone heard of this Coax before
>
>Happy Repeater Building
>
>Thanks Don KA9QJG
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] Looking for datasheet - SD1499-1

[Glenn Little WB4UIV]

Found this via google, not much, but something:

Part Number = SD1499-1
Description = Bipolar NPN UHF-Microwave Transisitor
Manufacturer = Various
V(BR)CBO (V) = 36
I(C) Abs.(A) Collector Current = 13
Absolute Max. Power Diss. (W) = 218
Semiconductor Material = Silicon
Package = SOT-119var
Military = N

At 08:50 PM 04/01/06, you wrote:
>Trying to find a datasheet for an RF power transistor - SD1499-1.  These
>were made by Thomson/ST Micro.  Can't seem to find anything on-line, not
>even a cross-reference.  Any help would be appreciated.  Thanks.
>
> --- Jeff
>
>
>
>
73
Glenn
WB4UIV







 
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Re: [Repeater-Builder] Micro Strips @ 220 MHz

[Glenn Little WB4UIV]

The selective frequency information comes from the engineers at EIMAC. When 
I toured their plant a number of years ago, I asked about the frequency 
selectiveness of the transistors. The engineer told me that a UHF 
transistor will not work at VHF. The impedances are wrong as well as the 
transistor geometry. Until then I though the same as you.

I would hope that the designers of the transistors would know what they are 
doing!!

I have never be able to get a UHF power transistor to work on VHF.

YMMV

73
Glenn
WB4UIV

At 06:34 PM 02/06/06, you wrote:
>At 06:27 PM 2/6/2006 -0500, you wrote:
> >Are the transistors rate at 220 MHz? RF power transistors are made for a
> >specific frequency range and will not operate at all well above or below
> >the design frequency.
>
><---I bet to differ, at least when it comes to using one at a lower
>frequency!
>
>RF power transistors have more gain the lower in frequency they go - the
>big problem is not allowing that added gain to cause feedback (or other
>parasitics) at the lower frequency. But assuming they're properly bypassed,
>an RF device rated for, 500 Mhz, will work perfectly well at 150 Mhz and
>with more gain!
>
>Ken
>--
>President and CTO - Arcom Communications
>Makers of the world famous RC210 Repeater Controller and accessories.
>http://www.ah6le.net/arcom/index.html
>Authorized Dealers for Kenwood and Telewave and
>we offer complete repeater packages!
>AH6LE/R - IRLP Node 3000
>http://www.irlp.net
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] Micro Strips @ 220 MHz

[Glenn Little WB4UIV]

Are the transistors rate at 220 MHz? RF power transistors are made for a 
specific frequency range and will not operate at all well above or below 
the design frequency.

73
Glenn
WB4UIV



At 11:09 AM 02/06/06, you wrote:
>Hello,
>
>Does anyone have a good way of measuring the frequency of PC board micro
>strips (M/S)?  I have tried my old Millen Grid Dip meter but there is just
>not enough radiated at 220 MHz to get a good dip.  I am trying to modify a
>transmitter from 168 MHz to 224 MHz and not having a lot of luck getting 220
>past these M/S's.  There is a M/S before the driver and another after the
>final.  Got everything tuned to the input of the Micro Strips but nothing
>past them.
>
>Paul
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] Re: Loss through adaptors:

[Glenn Little WB4UIV]

Lists some of the military codes to indicate who made an item.

73
Glenn
WB4UIV



At 03:15 PM 02/02/06, you wrote:

>I think the biggest problem that we face is that our adaptors tend to
>not have a pedigree.  I have some that I know were from Radio Shack,
>some that I bought at hamfests in boxes of "stuff", some with real
>pedigrees (amphenol, in the bag) and some that are precision test
>equipment in their own right.
>
>If cost were no object, we would do the whole thing in hardline and
>GPC-7 connectors and be done with it, right?  :)
>
>Someone mentioned before, an elbow or tee that used a SPRING to make
>the connection..  Boy, I would love to put that on my SA and see the
>plot!  Probably works nicely at some frequencies, and insanely badly
>at others.
>
>I ended up having to put at least one right angle in every radio
>connection. The daniels gear uses front panel N connnectors, and
>there's no way I could close the cabinet door without RA connectors.
>I couldn't find anything RA in N, so I used a single RA adaptor on
>each of the four lines.  Not sure who makes them. Markings are "CQA"
>or "CGA" and "UG-27/U"  Definitely silver plated.
>
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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RE: [Repeater-Builder] Crimp versus Clamp Connectors

[Glenn Little WB4UIV]

How did the installer get the braid ring installed backwards? In all of the 
Type-N connectors that I have installed on RG-214, The braid ring is 
relived so that it seats at the end of the insulation with the braid coming 
through and being fanned out. The person that installed the braid ring 
backwards could not have read any installation instructions for the 
connector. I sure would not want them doing ANY work for me.

I have not had a Type-N connector fail, that I installed, due to braid 
fatigue. I have seen some sloppy installs. The center pin set to the wrong 
depth, destroying the female connector on first mate. I have even seen a 
Type-N connector with an attempt having been made to solder the braid to 
the braid ring.

Where do these idiots come from??

73
Glenn
WB4UIV

At 09:10 PM 02/01/06, you wrote:
>Tony,
>
>You are absolutely correct.  It amazes me that anyone would install that
>component backwards, but some idiots do just that.  I and many others have
>seen it happen.  My statement would have been clearer, had I emphasized that
>excessive torque on the clamping nut will extrude the shield braid to the
>point that it is severely weakened.  Any tension or side-to-side movement
>will almost certainly break the braid and allow the feedline to pull right
>out of the connector.
>
>I stand by my statement that a *proper* installation of any feedline or
>antenna connector should not have *any* tension imposed upon it, and should
>not allow *any* side to side movement of the cable at the connector.
>Whether a clamp type or a crimp type connector is resistant to flapping
>around in the winds of Montana is irrelevant; that connection should be
>secured so that it does not move!
>
>The posters who described instances of cables breaking at the shield crimp
>(or clamp) should, perhaps, be correcting their installations so that the
>cable has neither tension nor the possibility of movement.  I submit that,
>if the above two conditions are met, braid breakage or separation cannot
>occur.  When properly installed and waterproofed, the method of attachment
>should have little influence on the longterm reliability.  As always, YMMV.
>
>73, Eric Lemmon WB6FLY
>
>
>-Original Message-
>From: Repeater-Builder@yahoogroups.com
>[mailto:[EMAIL PROTECTED] On Behalf Of Tony King, W4ZT
>Sent: Wednesday, February 01, 2006 6:47 AM
>To: Repeater-Builder@yahoogroups.com
>Subject: Re: [Repeater-Builder] Crimp versus Clamp Connectors
>
>
>Every Mil-spec clamp type N connector I have ever made put the knife
>edge towards the red gasket material, not the braid. See the scan of an
>original instruction sheet: 
>
>73, Tony W4ZT
>






 
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Re: [Repeater-Builder] Single repeater antennas vs. dual-band repeater antennas...

[Glenn Little WB4UIV]

Why would you mount the second antenna upside down???

Is this to keep the coax to the two antennas close together and gain the 
loss through the coax to the upside down antenna??

Is it to ensure early failure of the upside down antenna because of 
moisture buildup??

Is it to cause the signal to go toward space rather than back to the ground 
due to any possible down tilt built into the antenna??

I would use folded dipole antennas due to their grounded nature. The 
colinear antenna tend to have problems with flexing and lightning. When all 
but the bottom quarter wave section is disconnected due to flexing or 
lightning, there is no way to determine that you have an antenna problem 
from the ground.

Just my thoughts. YMMV.

73
Glenn
WB4UIV
Over 30 years in the amateur service.




At 07:32 AM 01/29/06, you wrote:
>On Sat, 28 Jan 2006, Jim Connell, KH6JKG wrote:
> > I have a preference for Station Master antennas. Although, most of our
> > sites are simulacasting on VHF & UHF. So, dual-band antennas where also
> > used over the years.
>
>You may be able to hack around this if you can get permission to install
>another antenna below your current antenna. Then get a diplexer, place it
>up the tower and mount the other band's super stationmaster upside-down
>below the primary one. You'll have to see about water drainage issues, of
>course.
>
> > On the sites with unused parts of these dual-band antennas, should the
> > unused section of the antenna be terminated?  With a short or 50 ohm
> > termination?
>
>Seems preferable to do so as some sites have reported interference issues
>from unterminated coax in the building attached to antennas on the tower
>no longer in use.
>
>--
>Kris Kirby, KE4AHR <[EMAIL PROTECTED]>
>"BIG BROTHER IS WATCHING YOU!"
>  This message brought to you by the US Department of Homeland Security
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] Re: Squeeling Problem Resolved!! (I hope)

[Glenn Little WB4UIV]

Another possibility is condensation. The amplifier heats up and moisture in 
the air condenses during cool down. Contaminants in the air and on the 
surface of the boards cause conductive paths. The boards were properly 
cleaned after any soldering on the boards? Flux is hygroscopic and becomes 
sticky when exposed to moisture.

Just a thought.

73
Glenn
WB4UIV



  At 10:20 AM 01/25/06, you wrote:

>You mentioned thermal cycling as a possibility...
>In my experience, it's a great way to kill equipment.
>
>Were the failed amps both the same type/design?
>It might be that you're seeing a mechanical stress induced failure.
>If they are different amps, then I don't think so, unless you just got
>lucky.
>
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
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>






 
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[Repeater-Builder] Duplexer building

[Glenn Little WB4UIV]

It looks like I will soon own some scrap copper or brass rigid coax. This 
is 3 to 4 inches in diameter, in 20 feet lengths with flanges on both ends. 
The TV station that I work for is going to be scrapping this. Does anyone 
have a need for some to possibly make UHF or higher duplexers/filters out 
of? I will have to cut these at least once to haul it from the transmitter 
site. If there is any interest, I will get the actual measurements and 
dispose of it here rather than the scrap yard. Will be asking scrap prices 
plus postage and a little for the fuel to transport and packing.

Let me know if you can use any of this.

73
Glenn
WB4UIV








 
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Re: [Repeater-Builder] putting a bigger heat shrink on a radio?

[Glenn Little WB4UIV]

What is a heat shrink??

73
Glenn

At 09:20 PM 12/12/05, you wrote:
>Heres a question for someone to answer, IF you were to take say a gm300
>45 watt radio and take say a lowband heatshrink from a maxtrac would
>the bigger heat shrink help disipate the heat better or would it not
>make a diference?
>
>
>
>
>
>
>
>
>
>
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Re: [Repeater-Builder] FS: RCA Super Carfone 500 Series

[Glenn Little WB4UIV]

Are these the radios that have the instant heat filaments and melt the 
solder on the tube socket when the mic is left off hook and the filaments 
stay on constantly?

Thanks
73
Glenn
WB4UIV

At 11:12 PM 12/08/05, you wrote:
>I have available for sale several RCA 500 series Super Carfone UHF
>transceivers. These include the receiver and transmitter strips with the
>vacuum tube power amplifiers, & mobile mounts (if you want them). The amps
>are good for about 90 watts output in FM service. These units are used, old
>stock removed from commercial service many years ago and stored in a
>climate controlled environment. They are not tested, presumed working. They
>are good for making repeaters, beacon transmitters, repeater receivers,
>control receivers, power amplifiers, organ donors for other RCA gear, and
>as 30 lb. (approx.) anchors for small water born craft.
>Asking $25 each plus shipping from 37212. Contact me via email at K4IDC at
>comcast dot net.
>
>Thanks,
>Robin Midgett K4IDC
>VHF+ Glutton EM66se
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] What equipment is needed to tune a repeater duplexer?

[Glenn Little WB4UIV]

To tune the duplexer correctly requires q VNA (Vector Network Analyzer). 
This will ensure that you have the duplexer at the correct frequency and 
impedance.

You can tune a duplexer to about 90% of it's ability with a spectrum 
analyzer and a tracking generator.

You can do a fair job with the service monitor and signal generator.

I have gotten a duplexer tuned to a somewhat usable form with a radio and 
signal generator.

It all depends on what you will accept, how noisy your transmitter is, how 
good the front end of your receiver is and how noisy your site is.

YMMV

73
Glenn
WB4UIV

At 10:19 AM 11/21/05, you wrote:
>What equipment is needed to tune a duplexer?  A service monitor and a
>signal generator?  Or is there something else?
>
>Thanks!
>K4RJJ Ronny
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] mobile repeaters

[Glenn Little WB4UIV]

What band?

For VHF, it would be very difficult, even if only on one channel due to 
duplexer size.

For UHF, the duplexer is doable, however, it would have to be retuned when 
you change frequencies, so, not practical.


73
Glenn
WB4UIV


At 10:41 AM 11/16/05, you wrote:
>I am curious,what would it take to build a moble repeater,I am wanting
>something that I can possibley change channels depending on what freq
>I want to use,it will be more for my use only cause I am in a rural
>area and want to be able to have my handheld go to the truck and then
>out with something like 100 watts or even 50 watts,I think that state
>patrol use something simalar to this but I dont know how to make one
>for the freqs I want or the cheapest way to do so,THANK YOU
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] repeater antenna connection

[Glenn Little WB4UIV]

Use properly installed type-N connectors, then seal. I have undone 
connectors that have been properly installed and used in an ocean front 
environment for 20 years. The connectors are as bright and clean as the day 
they were installed.

73
Glenn
WB4UIV



At 10:39 AM 11/12/05, you wrote:
> Is there anything that can be applied to the inside of an antenna 
> connection to prevent corrosion and oxidation?Kerry - WA2NAN - 
> [EMAIL PROTECTED]
>
>
>
>
>
>
>
>
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RE: [Repeater-Builder] Repeater Grounding

[Glenn Little WB4UIV]

Here is a good link. That one did work just before I sent the link. Here is 
a link that is working:


73
Glenn
WB4UIV


At 09:51 PM 08/08/05, you wrote:
>Glenn,
>
>I went to the below mentioned link and it comes back with page not found.
>If I delete the last part referring to the file name, I get into tscm.com
>but there is no reference to the grounding article.  Is there perhaps
>anything missing?
>
>Tnx
>
>Tony VE3DWI
>
>
> > Down load a copy of MIL-HDBK-419 "Grounding, Bonding, and Shielding for
> > Electronic Equipments and Facilities" 
>,
> > this is the military handbook on grounding. It is large and in two volumes
> > about 812 pages. One is theory, the other is practice. Covers grounding
>for
> > safety, lightning, nuclear blast and most everything else. A very good
>read
> > and eye opener.
> >
> > 73
> > Glenn
> > WB4UIV
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>
>
>
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>
>
>
>
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Re: [Repeater-Builder] Repeater Grounding

[Glenn Little WB4UIV]

I can send you a copy on CD if you want.

73
Glenn

At 02:20 AM 08/06/05, you wrote:
>Hi chaps!  Greetings from India.
>
>Can anyone tell me whether this handbook is available in hard copy?  The
>thought of downloading 812 pages is a bit daunting.
>
>73,
>
>George, VU2GT
>
>- Original Message -----
>From: "Glenn Little WB4UIV" <[EMAIL PROTECTED]>
>To: 
>Sent: Tuesday, August 02, 2005 8:51 AM
>Subject: Re: [Repeater-Builder] Repeater Grounding
>
>
> > Down load a copy of MIL-HDBK-419 "Grounding, Bonding, and Shielding for
> > Electronic Equipments and Facilities" <http://tscm.com/MIL-HDBK-419A.PDF>
>,
> > this is the military handbook on grounding. It is large and in two volumes
> > about 812 pages. One is theory, the other is practice. Covers grounding
>for
> > safety, lightning, nuclear blast and most everything else. A very good
>read
> > and eye opener.
> >
> > 73
> > Glenn
> > WB4UIV
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
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>






 
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Re: [Repeater-Builder] Repeater Grounding

[Glenn Little WB4UIV]

Down load a copy of MIL-HDBK-419 "Grounding, Bonding, and Shielding for 
Electronic Equipments and Facilities"  , 
this is the military handbook on grounding. It is large and in two volumes 
about 812 pages. One is theory, the other is practice. Covers grounding for 
safety, lightning, nuclear blast and most everything else. A very good read 
and eye opener.

73
Glenn
WB4UIV



You should see a solution to all types of grounding issues here. At 11:23 
PM 08/01/05, you wrote:
>Hello to the list and here is my question. The repeater site I am
>working at has little dirt and lots of rock. I have to use a jackhammer
>for the fence post holes, I can't hardly wait - ha ha. What are your
>thoughts? What have you done, if faced with the same problem. If
>this topic has been beat like a dead horse, let me know and I will go
>dig thru the archives. Thank you.
>
>Rod KC7VQR
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] Re: coax question

[Glenn Little WB4UIV]

In a duplex situation, you need as a minimum RG-214/U (must be the real 
stuff with silver plating). This would be used from transmitter and 
receiver to duplexer. From the duplexer to the antenna would depend on 
distance. 7/8" hardline preferred, 1/2" hardline acceptable.

73
Glenn
WB4UIV

At 11:33 AM 07/31/05, you wrote:
>Hi Glenn,
>VHF highband and 25 watts
>
>
>--- In Repeater-Builder@yahoogroups.com, Glenn Little WB4UIV
><[EMAIL PROTECTED]> wrote:
> > For what frequency, power, intended use?
> >
> > 73
> > Glenn
> > WB4UIV
> >
> >
> > At 10:13 AM 07/31/05, you wrote:
> > >Hi,
> > >Just a question to ask what type of coax which you would recommend?
> > >Thanks
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >Yahoo! Groups Links
> > >
> > >
> > >
> > >
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] coax question

[Glenn Little WB4UIV]

For what frequency, power, intended use?

73
Glenn
WB4UIV


At 10:13 AM 07/31/05, you wrote:
>Hi,
>Just a question to ask what type of coax which you would recommend?
>Thanks
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] Anybody have the ability to scan microfiche?

[Glenn Little WB4UIV]

I also have the LBI library on microfiche. I have copied some at the 
library onto paper, but the quality is not real good. I suspect that the 
microfiche is not going to produce great PDF files, but much better than 
nothing. My set is also available for reproduction to PDF. I have been 
looking for more than a year now for a scanner that has the resolution to 
scan the microfiche, but have had no luck. When I attempted to scan one at 
2400 dpi optical as if it were a negative, the results were almost unreadable.

73
Glenn
WB4UIV

At 06:29 PM 07/09/05, you wrote:
>I received an email that presents an interesting possibility...
>
>  >Mike
>  >I don't know if you would be interested of not.  I have a set of 
> the old
>  >LBI library on microfiche.  I have no way of transferring them but I would
>  >be glad to make them available to someone who can.
>
>I've had enough emails referencing the LBI list web page and asking
>if I have Mastr-Pro or even Progress line equipment LBIs that the
>above offer is interesting.
>
>So - - -
>anybody have access to a system that can scan a microfiche
>and make a PDF out of it?
>
>Mike WA6ILQ
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] OT Burned Attenuator

[Glenn Little WB4UIV]

Laryn

How many of each do you need and what size are they? What attenuator are 
these in?

73
Glenn
WB4UIV

At 11:34 PM 07/07/05, you wrote:
>I have committed the unforgivable sin in RF world.  I transmitted into
>my step attenuator and burned up some precision resistors.  self now>
>
>What kind of currently available resistors are considered to be
>non-inductive and usable for attenuators up thru 450mc.  Carbon film,
>carbon composition, metal film...  What construction do I start
>browsing for?  I need values of 247.5 and 61.1 ohms.  (or somewhere
>close...)
>
>Thanks all.
>
>Laryn K8TVZ
>
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] Repeater heard on Aviation Channel! HELP

[Glenn Little WB4UIV]

Is your repeater on 145.035?

73
Glenn
WB4UIV

At 09:48 PM 07/05/05, you wrote:
>Ok, the situation is that my repeater is being heard by commercial
>aircraft on 132.950 Mhz.  At first they was able to identify one user
>of the system, this was in June.  Then again the repeater was heard on
>June 22, this time stating they could hear several users on the system.
>The did not give any other specifics other than this.  This comes from
>Pilots whom reported the occurance with the FAA in Chicago.  I'm told
>the interference is only to the planes, and not the ground tower.
>I've looked at the transmitter on the SA, there is one small spur
>there, but this same spur is there if I use just an ht, or any other
>radio for that matter.  This is hooking it to the repeater antenna
>directly, or through the duplexer's.  My question is, could it be
>something in the antenna system, or where might I look.  My system
>consist of a DB224 retuned for the ham bands, up 92' fed with 7/8"
>hardline.  There is two horizontal antenna's below the repeater
>antenna, a cushcraft 5 element 6 meter beam and a Hygain TH7 below
>that.  The tower is a guyed tower, with two sets of guys, one set at
>65' and the other at 35'.  There is no breaks in the 1/4" steel
>cables.  The deviation on the repeater into my SM only showed 4.5 to 5
>Khz wide, although the audio was tinny.  Over the past few days I have
>been working on the tinny audio, for which I believe I have fixed, as
>it sounds much better.  The transmitter is the Maggorie Hi Pro EV1 and
>the amplifier is a Vocom 200 watt amp.  90 Watts is what is being fed
>to the antenna from the duplexer.
>
>Mathew
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] UHF Micor (mobile) spur

[Glenn Little WB4UIV]

Paul

910 Kc is twice the 455 Kc IF. Possibly there is a clue here. Motorola had 
problems with spurs in the Metrum VHF ham transceiver. It also used one 
crystal for both transmit and receive. I guess that this is a good data 
point as to why mobiles should not be used as repeaters. The repeater and 
base station is a complete redesign and uses separate crystals for transmit 
and receive. Probably they saw the problem and made the intelligent 
decision to keep the spurs at ground level in the mobiles and use a clean 
transmitter for base stations and repeaters.

This is an observation from someone that made a decision a long time ago 
that mobiles were not designed for repeater service.

Hope you can solve the spur problem. Probably related to the 
transmitter/receiver offset and will probably require a redesign to get rid 
of the spur.

73
Glenn
WB4UIV


At 10:39 AM 07/02/05, you wrote:
>So, no one here has ever run into this before?  Really??!
>
>I found and tested a third radio... same problem.
>
>To restate what the problem is:  Micor mobile UHF T34...
>when running in the ham band transmit low / receive high
>they are spurring 910 kHz above the transmit freq.  I don't
>know what would happen if the frequencies were reversed.
>
>443.750T 448.750R  spur at 444.660
>444.000T 449.000R  spur at 444.910
>
>It's not a power supply problem.  The spur is generated low
>level, not in the PA (it's somewhere before or at the
>exciter mixer, Q305).  It's not the offset oscillator.  No
>amount of tuning or de-tuning various stages has any affect
>on the spur.
>
>Paul  N1BUG
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] OT-IFR 1100 Info?

[Glenn Little WB4UIV]

Paul,

You might try <[EMAIL PROTECTED]>

This is the test equipment reflector that I found.

73
Glenn
WB4UIV


At 11:20 AM 06/21/05, you wrote:
>Hello,
>
>I know this is a bit off topic but I need a service manual for a IFR 1100 S,
>is there any message groups out there that may be able to help?  Looked all
>over Yahoo and nada
>
>Thanks,
>Paul
>
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
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>






 
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Re: [Repeater-Builder] RS Astron up to 15 volts, will it be ok

[Glenn Little WB4UIV]

If the Astron supply has a crowbar installed, the supply will have very 
little headroom before the crowbar shuts it down. You can probably change 
the detection circuit for the crowbar so that you have a volt or so of 
headroom at 15 V.

73
Glenn
WB4UIV

  At 08:28 PM 06/07/05, you wrote:
>Can an Astron RS-70 power supply be taken up to 15 volts and survive
>ok?  He is the situation.  I have a bank of batteries for the repeater
>and a West Mountain PWRgate 40 amp switch that goes between the power
>supply, the batteries and the repeater.  WHen I put it in line, and
>hook it all up, I loose a considerable amount of repeater power.
>Nearly 1/4th of the power.  Measuring the voltage out of the power
>supply is 13.6 and the voltage out of the PWRgate is about 12.6 volts.
>Any ideas or suggestions.
>
>Mathew
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] What is Q? and what is Q control?

[Glenn Little WB4UIV]

Q is figure of merit. The Q of a circuit determines how selective it is. In 
a filter the Q would be an indication of the slope of the skirt. The higher 
the Q the sharper the slope of the skirt and the more rejection available 
to the  filter. In a capacitor it is how lossy the capacitor is, the same 
with a coil. In a coil, the higher the resistance of the coil winding, the 
lower the Q. In a capacitor, the more energy absorbed by the dielectric, 
the lower the Q. The less energy absorbed, the higher the Q.

Any good basic electronics theory book will define Q.

73
Glenn
WB4UIV



At 10:20 PM 06/06/05, you wrote:
>I am in the middle of a dispute about  Q
>
>I am saying that Q control sets the width of the band of freqs. that will 
>be boosted or reduced..
>it affects the amount of freq. around the center freq. which will have a 
>similar amount of boost or reductions. the with of the band is given in 
>octives.. Q affects this width, but Hi Q #'s mean a narrow number of bands 
>will be affected.
>
>
>Q is the bandwith around the center freq.
>
>
>The other guy is saying that Q is the measurement of peaking that causes 
>near the natural( center ) freq..
>
>
>I dont see that cause PEAKING to me is not a correct term to be used. in 
>refrence to Q
>
>
>ANY help or thoughts..
>
>Brent
>
>
>
>
>
>
>
>
>--
>Yahoo! Groups Links
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Re: [Repeater-Builder] HJ9-50 loss

[Glenn Little WB4UIV]

I was told that cable starts to act like lossy waveguide when the cable 
gets large and the frequency get high. I now see that good RF cable 
manufactures and sellers now publish the upper frequency limit when they 
publish loss for larger cable.

73
Glenn
WB4UIV


At 09:50 PM 06/04/05, mch wrote:
>Why is that? Does the feedline start acting like an antenna (or dummy
>load) when the conductors are 1/4 wavelength apart or something?
>
>Joe M.
>
>DCFluX wrote:
> >
> > 960MHz is the highest usable frequency because the inner conductor to
> > outer conductor distance.
>
>
>
>
>
>
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>
>
>
>






 
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Re: [Repeater-Builder] Owners manual for Motorola Triton Nautilus 440 Marine radio

[Glenn Little WB4UIV]

Does the connector look like this?

View in courier font.

  ___  ___
|   \/   \/   |
| ooo |
| |
| ooo |
___


If so I can provide the probable pinout. It should have plus 12 volts, 
ground and a jumper between two pins for the speaker.

73
Glenn
WB4UIV


At 06:07 PM 06/01/05, you wrote:
>Does anyone have it? (pdf, doc, etc.)
>
>In leu of the manual, does anyone have the pin out connections on the
>back of the radio?  I acquired this one from a friend but he doesn't
>have 6-pin harness that plugs into the radio.
>
>Thanks!!!
>
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
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Re: [Repeater-Builder] Motorola APCOR

[Glenn Little WB4UIV]

Al

The APCOR unit came in a number of flavors. Could be MT-500 or MX-3XX or 
some other HT as the transmitter and receiver. IIRC there is a 10 Watt PA. 
The duplexer is usable. The unit should be 10 frequencies and 10 PL tones. 
Probably the PL tones are selectable separate from the frequency. The unit 
was capable of both voice and data transmissions.

To get more specific one would have to have the model number or the type of 
HTs used to build it.

Hope this helps a little

73
Glenn
WB4UIV


At 04:21 PM 05/22/05, you wrote:
>Hi, all,
> One of the few Dayton acquisitions this years was a Motorola APCOR unit.
>Apparently it was designed for medical/EMT use and is supposed to be able to
>do full duplex. Does anyone have any technical info on this unit they would
>care to share? It looks like it might make a decent field/temporary/portable
>repeater.
>
>Al, K9SI
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] Poor Repeater RX

[Glenn Little WB4UIV]

Is the preamp in a shielded box?
Is the power to the preamp via a feedthrough capacitor?
How does the repeater perform without the preamp?
What does the transmitter look like on a spectrum analyzer?
How does the repeater work with a simple 1/4 wavelength vertical?
Is all of the cable going into the duplexer, from both the transmitter and 
the receiver, double shielded (RG-214/U or better)?
The MITREK shares a common board between transmitter and receiver making 
duplexing difficult without desense. HOw does the repeater perform using a 
second MITREK as the receiver?

Some ideas as to where to look.

Hope you find the problem.

73
Glenn
WB4UIV


At 10:18 PM 05/20/05, you wrote:
>   Hello,
>  Well here is one that cant be figured out locally, thought I would
>throw it to the experts. My high school radio club has recently made a
>few upgrades to our VHF repeater. We replaced the Ringo Ranger antenna
>with a Comet GP-9 Antenna, replaced the 9913 coax with Andrews 1/2''
>Heliax, and put a Mirage Pream inline. The problem we are having is
>mainly with the preamp (I think)
>   I will describe the setup and give all the specs first. The repeater
>Rx and Tx is from a 110 Watt Motorola Mitrek power out from the Mitrek
>is 50 watts. The power supply is an Astron RS-70M, Duplexer is a
>Sinclair Q202G (yes, it is properly tuned and working as it should)
>the antenna is rooftop on the schools theater building (the roof is
>about 75 feet AGL and the antenna is on an 8' mast pipe) there are no
>obstructions for at least 5 miles around. The preamp setup is as
>follows, it is after the duplexers and before the reciever. We have
>the preamp directly connected into the duplexer and a jumper going
>from the preamp to the Rx bulkhead on the repeater cabinet. The preamp
>has two settings, a higher gain and a lower gain setting, initially we
>had it setup to the higher gain setting but I went up today and
>switched over to lower gain and turned the power output to 30 watts.
>   The problem we have is the Rx is not what is should be. It is a tad
>worse then when we were running the repeater at 15 watts without the
>Preamp. I would really like to get the preamp to work like it should
>in the repeater system, I just dont have any ideas on what to do next
>to get better sensitivity on the machine. Any thoughts and ideas would
>be appreciated. Thanks.
> Alexander KG4OGN
>
>  P.s, all jumpers are made with double shielded ridgid coax, so thats
>not the cause of the problem.
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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Re: [Repeater-Builder] Motorola Micom SSB 100 Mobile Radio Manual

[Glenn Little WB4UIV]

I will see if I still have a manual.

What frequencies are you using?

  I volunteer for the local Red Cross.

73
Glenn
WB4UIV

At 07:00 PM 05/13/05, you wrote:
>This is off base for repeaters BUT I'm looking for a manual for the
>Motorola Micom SSB 100 mobile HF radio to finish off a local Red
>Cross
>project. I need to see the dip switch \ diode setup to get more than
>1
>channel to work. Thanks!
>
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
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RE: [Repeater-Builder] Caution on Bomar Crystals

[Glenn Little WB4UIV]

If you cannot afford International, you cannot afford to put a repeater on 
the air.

Repeaters can get to be costly. Being a good neighbor is very cheap 
insurance. Poor crystals = being a possibly bad neighbor (causing 
interference or being off frequency).

Good quality every thing in a repeater is cheaper in the long run. The 
repeater stays on the air longer, it works better, fewer trips to the site, 
less unknown problems , etc.

Cheap at the beginning equates to poor performance until you get the 
quality up.

I have attempted to use off breed crystals (Bomar, Standard, Jan and 
others). These sometimes work ok for something that is not critical and 
does not have the potential to generate interference over a large area. I 
always go back to International when I want reliability.

YMMV, this is the opinion of one person that has been in the electronics 
field for only 45 years. I still have a lot to learn.

73
Glenn
WB4UIV

  At 10:55 PM 05/10/05, you wrote:
>Mark,
>
>I am about to order crystals for 6 repeaters, was thinking about Bomar or
>Standard, can't afford International for obvious reasons.  Glad you posted
>this, I will be very careful!
>
>Paul
>
>
>
>-Original Message-
>From: Repeater-Builder@yahoogroups.com
>[mailto:[EMAIL PROTECTED] Behalf Of Mark Boden
>Sent: Tuesday, May 10, 2005 1:53 PM
>To: Repeater-Builder@yahoogroups.com
>Subject: [Repeater-Builder] Caution on Bomar Crystals
>
>
>FYI on orders to Bomar Crystal.
>
>Just had a flustrating phone conversation with Bomar.  Ordered 3
>crystals at $10 each.  Came in at $20 each plus $10 shipping.
>
>Asked why.  Was told it was billed wrong.  Offered to credit me $2.50
>each as they made them on a 2 week basis (RUSH) and there is a $50
>minimum.  They were not sure who took order.  They said they ALWAYS let
>everyone know about the minimum. I ordered them as a trial first order
>on a non critical job.
>
>Would not budge or change back to what I ordered. Would not allow me to
>discuss with anyone else on this standard delivery phone order.  They
>did allow me to send them back for full credit.
>
>They suggested that I be careful in  ordering next time.  I think I
>learned my lesson on this first order.  This is a disappointment.
>
>Mark Boden - N4TZV
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>
>
>
>
>
>
>
>
>
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>
>
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Re: [Repeater-Builder] Noise on 50MHz repeater

[Glenn Little WB4UIV]

Matt

The low band equipment that has noise blankers receive on a nearby 
frequency and use the impulse noise that it sees to reduce the noise on the 
channel if interest. They invert the signal from the nearbuy frequency and 
apply it to the channel of interest. This would apply to broadband noise 
only. It works somewhat to remove impulse noise such as ignition noise, 
lightning strike generated impulse noise, arcs from the power line and the 
like.

It might prove somewhat useful in your situation. I would not pent a lot of 
money on one. I would get the service manual for a low band radio that has 
a noise blanker and build one.


73
Glenn
WB4UIV


At 05:41 PM 05/05/05, you wrote:
>My 50MHz repeater is troubled by a high noise level on the site its
>operating from - my noise floor is around -100dBm!!
>
>The source of the noise is all the digital equipment in the other buildings
>on the site. I have approached the owners of this equipment to try to get
>them to screen their cabling but they aren't interested sadly.
>
>Has anyone ever used one of the MFJ-1025 noise cancelling type devices in
>their receive path to get rid of this type of noise?
>
>I know the unit is only spec'ed up to 30MHz but I figured a mod to extend
>that to 50MHz would not be too hard.
>
>Any thoughts or experience would be much appreciated before I part with my
>£130 and find it's no good!
>
>Thanks in advance,
>
>Matt
>G4RKY
>
>
>__
>Do You Yahoo!?
>Everything you'll ever need on one web page
>from News and Sport to Email and Music Charts
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Re: [Repeater-Builder] Re: 6-m Repeater

[Glenn Little WB4UIV]

These sound like CATV equipment where they received one channel and 
translated it to another.

Since these appear to be UHF out, there would be little that could be use 
on 6 meters.

If you has something that was channel 2 in, you would have circuitry that 
could be made to tune 6 meters for receive.

However the translator is at least 6 MHz wide and the signal that you need 
is only 5 KHz or so wide.

You might be able to salvage some oscillators or tuned circuits for 
building blocks if you had the knowledge and experience to use them. You 
could also salvage a lot of transistors and passive components for 
projects. Ther might be some double balanced mixers that you could use.

There are probably some power supplies that you could use.

Keep in mind that most TV equipment is 75 Ohms in and out, where the 
communications stuff is 50 Ohms.

As far as using any of the assemblies as is, not probable.

73
Glenn
WB4UIV
Engineering Tech WTAT/WMMP TV.


At 08:30 PM 04/28/05, you wrote:
>---The only thing I can find on the radio's are: TTC UHF TV Translator,
>ch4 serial 242 650-810mhz/and on another input9-43out
>I know nothing about these,
>
>  In Repeater-Builder@yahoogroups.com, DCFluX <[EMAIL PROTECTED]> wrote:
> > What Model/Make are they?
> >
> > On 4/27/05, kb9zes <[EMAIL PROTECTED]> wrote:
> > >
> > >
> > > I have 3 old TV-translators. Cabinets are 6ft tall. Does anyone
>know if
> > > I could convert any of these parts into one, to build a 6m
>repeater? Or
> > > if anyone else has a need for the translators for parts?
> > >
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
> > >
>
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>
>






 
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