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CX2SA > SATDIG 18.06.05 07:32l 208 Lines 6304 Bytes #999 (0) @ WW
BID : 63171-CX2SA
Read: GUEST
Subj: AMSAT-BB-digest V2004 #746 3/7
Path: DB0FHN<DB0RGB<DB0AAB<F6KFT<DB0GE<DB0ZDF<DB0LJ<DB0RES<DK0WUE<7M3TJZ<
F6KMO<ON0BEL<CX2ACB<CX2SA
Sent: 050618/0613Z @:CX2SA.LAV.URY.SA #:63171 [Minas] FBB7.00e $:63171-CX2SA
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Message: 5
Date: Fri, 17 Jun 2005 15:55:40 -0400
From: "Woody" <kj4so@nc.rr.com>
Subject: Re: [amsat-bb] RE: S band for 6 bucks
Robin Wrote:
> Hi all,
> Perhaps I missed it, but did any one come up with the definitive ICM
> part number for the replacement crystal?
> I saw Ron's (W6ZQ) message saying the "Catalog P/N is 746067" appear
> to be the one.
> Has this been confirmed?
> Any way I would be interested in hearing more of other's experience in
> obtaining replacement crystals.
>
> How many people plan on replacing the crystal in their units?
> Would it be enough to attempt a batch order?
> Perhaps there >>might<< be a discount by consolidating the orders.
>
Hi Robin:
The crystal that Ron's (W6ZQ) message referenced, "Catalog P/N is
746067" was made for a Norsat 2500 downconverter. This may, or may not
be the correct crystal since it was made for a different manufacturer
than California Amplifier.
I have not found any published specs for this downconverter, so I do not
know what the crystal specs are.
I called International Crystal (ICM) this afternoon. They have an
8.8125 MHz. crystal in their catalog that was made for a California
Amplifier model 130001 downconverter. It would seem that this is in the
same family as the 130215 ($6) downconverter, but I have no way to be
certain. The safest way would be to remove the original crystal from
the downconverter and send it to International Crystal. They will test
it to determine what is needed. If you do this, please post the
information on the AMSAT BBS so that it can help others who want to
obtain the correct crystals.
The crystal that I found is:
ICM p/n 525347
Freq. = 8.8125
Holder = HC-49 (wire leads & .5" tall)
Accuracy = 25 ppm (30 ppm temp)
Lead time = 4 wks (special order)
Price 1 - 10 pcs. = $19.95 each
11 - 25 pcs. = $14.96 each
26 - 99 pcs. = $12.57 each
International Crystal - ICM
1-800-725-1426
Barbara in Sales - ext. 249
Good luck & 73,
Woody
KJ4SO
AMSAT # 5562
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------------------------------
Message: 6
Date: Fri, 17 Jun 2005 16:59:17 -0400
From: sco@sco-inc.com
Subject: Re: [amsat-bb] Rotor Adjustment
I got another elevation rotor and it works fine now.
But I really hate this rotor cable I bought at HRO. It is so stiff and ties
into nots. We use it for portable and Field Day use. if it was a one time
installation it may be fine. Does anyone use any softer easier to roll cable?
At 04:09 PM 6/17/2005, you wrote:
>Hi, Les
>
>1) Disconnect the wires E1 E2 and E3 from the control box
>
>2) Get an ohmmeter and measure the resistance between E1 and E3
> you should measure 500 ohm
>
>3) Measure the resistance between E1 and E2 and the value measured
> depends on the rotor position but in any case you should measure
> a value ranging between 0 ohm to 500 ohm
>
>4) Measure the resistance between E2 and E3 and you should measure
> a value ranging from 0 ohm to 500 ohm depending on the rotor
> position.
>
>I suspect that in your case the resistance between E2 and E3 is infinite
>because the circuit somewhere is open.
>
>If the circuit between E2 and E3 is open there are two possible reasons.
>
>a) The wire E3 between the control box and the rotor is open along the
> run or the screw E3 of the rotor is loosy.
>
>b) Worse case the potentiometer between E3 and E2 is internally open
>
>In this case to be absolutely sure you must disconnect the wires
>E1 E2 and E3 from the motor and using the same procedure you should
>measure the potentiometer resistance directly to it
>
>If the potentiometer is open between E2 and E3 the motor must be open
>and the potentiometer must be replaced.
>
>Please let me know the results of your measurements.
>
>Best 73" de
>
>i8CVS Domenico
>
>----- Original Message -----
>From: <sco@sco-inc.com>
>To: "i8cvs" <domenico.i8cvs@tin.it>
>Sent: Friday, June 17, 2005 3:38 PM
>Subject: Re: [amsat-bb] Rotor Adjustment
>
>
> >
> > Are you saying that the problem is inside the rotor itself?
> > Is that something easy to locate and fix?
> >
> > Les
> >
> > At 03:51 AM 6/17/2005, you wrote:
> > >Hi, Les
> > >
> > >The 500 ohm potentiometer inside the rotor unit has one end
> > >connected to the positive DC voltage in to the control box and
> > >the wiper is connected to the meter via a adjustable trimmer.
> > >The other end of 500 ohm potentiometer is connected to the
> > >negative DC voltage in to the control box.
> > >If the negative end of potentiometer get disconnected from the
> > >negative in to the control box because of an open circuit than the
> > >potentiometer functions as a reostat in series to the meter and the
> > >dial goes all the way over the max right position no matter the
> > >motor is rotate in any position.
> > >The open circuit can be in the wire connecting the pot to the
> > >control box or the pot itself.
> > >
> > >Best 73" de
> > >
> > >i8CVS Domenico
> > >
> > >----- Original Message -----
> > >From: <sco@sco-inc.com>
> > >To: <amsat-bb@AMSAT.Org>
> > >Sent: Thursday, June 16, 2005 10:12 PM
> > >Subject: [amsat-bb] Rotor Adjustment
> > >
> > >
> > > > When I turn the power on to my G5500 controller the needle on the
> > >Elevation
> > > > dial goes all the way over to the max right position.
> > > >
> > > > How do i adjust it back to normal?
> > > >
> > > > Les
> > > > ----
> > > > Sent via amsat-bb@amsat.org. Opinions expressed are those of the
>author.
> > > > Not an AMSAT member? Join now to support the amateur satellite
>program!
> > > > To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
> > >----
> > >Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
> > >Not an AMSAT member? Join now to support the amateur satellite program!
> > >To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org
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Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
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