[ARC5] ARC5 Digest, Vol 159, Issue 50

Mon Apr 24 17:36:05 EDT 2017

Thank you guys..it is very clear now..great info..Dave I like the 4 
suggestions for the 455khz scenario and I am chasing up the board,hi!..73 de 
Pat/EI7CN

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Sent: Monday, April 24, 2017 1:41 AM
To: arc5 at mailman.qth.net
Subject: ARC5 Digest, Vol 159, Issue 50

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Today's Topics:

   1. Re: programable crystal oscillators (David Stinson)
   2. Re: programable crystal oscillators (Robert Nickels)
   3. Re: ARC 5 reciever backlash. (don davis)
   4. Re: ARC 5 reciever backlash. (Lenox Carruth)

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Message: 1
Date: Sun, 23 Apr 2017 13:47:11 -0500
From: "David Stinson" <arc5 at ix.netcom.com>
To: <arc5 at mailman.qth.net>
Subject: Re: [ARC5] programable crystal oscillators
Message-ID: <A777C7D0905841DAACE0A607CACDA3B4 at DaddyPC>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=response

----- Original Message ----- 
From: "Paddy Ryan" <pei7cn at eircom.net>
Subject: [ARC5] programable crystal oscillators

> I think also that they are only available from 1mhz up? then
> 455khz etc. is out even if it is 0.455mhz...73 de Pat/EI7CN

To get sub-1 MHz frequencies, follow the Prog. Osc.
with a CMOS 4060, which will divide by 32.
i.e. for 455 KC, order a 14.560 MHz.
You could use one of those 4-Oscillator boards
to get
(14.560)  455 IF Alignment,
(14.528)  454 CW
(14.480)  452.5 LSB
(14.640)  457.5 USB

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Message: 2
Date: Sun, 23 Apr 2017 14:27:28 -0500
From: Robert Nickels <ranickel at comcast.net>
To: arc5 at mailman.qth.net
Subject: Re: [ARC5] programable crystal oscillators
Message-ID: <792d2c40-cd17-7238-6e99-b8255c3f9042 at comcast.net>
Content-Type: text/plain; charset=windows-1252; format=flowed

On 4/23/2017 12:34 PM, Paddy Ryan wrote:
> .I take it if you want 1415khz (for an ARC bfo e.g) you cannot get it
> by ordering 1.415 MHZ or can you?.

Sorry for the confusion, Paddy.   DigiKey's people must enter the
frquency in MHz, so if you give them KHz, it requires them to delay your
order while they call or email you for correction.

Thus,  if you want 1415 KHz, simply specify the frequency as 1.415
Mhz.   For 6800 KHz, specify it as 6.8 MHz, etc.    Since the lowest
frequency available with these parts is 1.0 MHz, if you wanted something
like a .455 KHz signal for a BFO, you might buy an oscillator programmed
for 4.55 MHz and divide the output by 10, or as in one little radio I
recently did, use a frequency in the 2.275 MHz range and divide by 5,
since the old reliable 7490 decade counter contains a divide by 5
counter.   Lots of ways to go, but you'll need to wire up the external
circuitry needed and be mindful of spurs or harmonics that may result.

It's no problem to specify frequencies to 100 Hz precision needed to
generate an on-frequency SSB signal for example.  Just be certain of
what you give them because these devices are not returnable after they
are programmed.

73, Bob W9RAN

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Message: 3
Date: Sun, 23 Apr 2017 16:51:40 -0700
From: "don davis" <dxguy at earthlink.net>
To: "'Bruce Long'" <coolbrucelong at yahoo.com>, <WA5CAB at cs.com>,
<Arc5 at mailman.qth.net>
Subject: Re: [ARC5] ARC 5 reciever backlash.
Message-ID:
<!&!AAAAAAAAAAAYAAAAAAAAAO3NLm+r0kBFo+eoEOIVyavCgAAAEAAAAFtz5cogtbRNrvvKxhDP/[email protected]>

Content-Type: text/plain; charset="utf-8"

Nearly foolproof method:  Use hot air gun at 150 deg F on backlash plates, 
remove heat and spray WD40 on the plate faying surfaces.  I?ve saved lots of 
expensive race car parts using this method.  May have to repeat several 
times.  NO OPEN FLAMES?..

73 de don ad6pb

From: ARC5 [mailto:arc5-bounces at mailman.qth.net] On Behalf Of Bruce Long via 
ARC5
Sent: Sunday, April 23, 2017 10:51 AM
To: WA5CAB at cs.com
Cc: arc5 at mailman.qth.net
Subject: Re: [ARC5] ARC 5 reciever backlash.

You might not need to remove the tuning capacitor  I was able to clean old 
dry lube out of split anti back lash gears with repeated application of 
solvent

I used alternating acetone and penetrating oil with final clean with 
denatured achohol
Sent from my iPhone

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Message: 4
Date: Sun, 23 Apr 2017 19:41:22 -0500
From: "Lenox Carruth" <radios at sbcglobal.net>
To: <Arc5 at mailman.qth.net>
Subject: Re: [ARC5] ARC 5 reciever backlash.
Message-ID: <00a401d2bc93$82758540$87608fc0$@net>
Content-Type: text/plain; charset="utf-8"

I have found that lacquer thinner (the cheapest you can find) will clean 
almost anything.  Use it outdoors and do not get any on painted surfaces or 
plastic.  It is great for cleaning the WW-II grease that has turned to wax 
out of dynamotor bearings (before you run the dynamotor).

I use Break Free CLP for almost all lubricating that requires oil unless it 
is really delicate - like a watch.  It works in all but sub-zero 
temperatures.  Shake well before using and use sparingly.  It doesn?t take 
much.

I read somewhere a few days ago that split gears should not be lubricated 
but I can?t find the reference so take that with a grain of salt until you 
do the research.

Lenox

WA5OVG

Subject: Re: [ARC5] ARC 5 reciever backlash.

Nearly foolproof method:  Use hot air gun at 150 deg F on backlash plates, 
remove heat and spray WD40 on the plate faying surfaces.  I?ve saved lots of 
expensive race car parts using this method.  May have to repeat several 
times.  NO OPEN FLAMES?..

73 de don ad6pb

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