[R-390] R-390 Digest, Vol 131, Issue 1
Bob Camp
kb8tq at n1k.org
Tue Mar 10 07:12:04 EDT 2015
Hi
It’s a sad story and it begins with the extreme difficulty of acquiring and properly cooking
kielbasa due to snow …
=======
This is not the only list that is running at a very low volume at the moment.
Bbo
> On Mar 10, 2015, at 6:58 AM, Pete Williams <jupete at internode.on.net> wrote:
>
> Delivery....the list.... apropos my last,got a digest today March 10.
> Dates on the entries in this digest Feb 26....... again, what gives ?
> Pete VK3iZ
>
> On Tue, Mar 10, 2015 at 5:14 PM, <r-390-request at mailman.qth.net> wrote:
>
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>> Today's Topics:
>>
>> 1. Re: This may be of help to someone (Richard Loken)
>> 2. Re: This may be of help to someone (Bob Young)
>> 3. Re: This may be of help to someone (Norman Ryan via R-390)
>> 4. Re: This may be of help to someone (Roger Ruszkowski)
>> 5. Re: This may be of help to someone (David Wise)
>> 6. What's happened .......? (Pete Williams)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Thu, 26 Feb 2015 12:27:56 -0700 (MST)
>> From: Richard Loken <richardlo at admin.athabascau.ca>
>> To: Bill Abate <wabate at verizon.net>
>> Cc: R-390 <R-390 at mailman.qth.net>
>> Subject: Re: [R-390] This may be of help to someone
>> Message-ID:
>> <Pine.PMDF.4.44L.1502261226010.1092-100000 at admin.athabascau.ca>
>> Content-Type: TEXT/PLAIN; charset=US-ASCII
>>
>> Karamba!
>>
>> I am quite impressed. I fear that I would have given up long before
>> getting
>> to the long screw piercing the wiring harness... I would have jammed out
>> about the time I found the soldered gear moving on its shaft.
>>
>> --
>> Richard Loken VE6BSV, Unix System Administrator : "Anybody can be a
>> father
>> Athabasca University : but you have to earn
>> Athabasca, Alberta Canada : the title of 'daddy'"
>> ** richardlo at admin.athabascau.ca ** : - Lynn Johnston
>>
>>
>>
>> ------------------------------
>>
>> Message: 2
>> Date: Thu, 26 Feb 2015 16:33:48 -0500
>> From: Bob Young <bobyoung53 at hotmail.com>
>> To: "r-390 at mailman.qth.net" <r-390 at mailman.qth.net>
>> Subject: Re: [R-390] This may be of help to someone
>> Message-ID: <BLU177-W40BE3C01B0C623555A7D2DCC140 at phx.gbl>
>> Content-Type: text/plain; charset="iso-8859-1"
>>
>> Yes, very impressive and inspiring,
>>
>> Bob Young
>> KB1OKL
>>
>>> Date: Thu, 26 Feb 2015 12:27:56 -0700
>>> From: richardlo at admin.athabascau.ca
>>> To: wabate at verizon.net
>>> CC: R-390 at mailman.qth.net
>>> Subject: Re: [R-390] This may be of help to someone
>>>
>>> Karamba!
>>>
>>> I am quite impressed. I fear that I would have given up long before
>> getting
>>> to the long screw piercing the wiring harness... I would have jammed out
>>> about the time I found the soldered gear moving on its shaft.
>>>
>>> --
>>> Richard Loken VE6BSV, Unix System Administrator : "Anybody can be a
>> father
>>> Athabasca University : but you have to
>> earn
>>> Athabasca, Alberta Canada : the title of
>> 'daddy'"
>>> ** richardlo at admin.athabascau.ca ** : - Lynn Johnston
>>>
>>> ______________________________________________________________
>>> R-390 mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/r-390
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:R-390 at mailman.qth.net
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>
>>
>> ------------------------------
>>
>> Message: 3
>> Date: Thu, 26 Feb 2015 21:49:55 +0000 (UTC)
>> From: Norman Ryan via R-390 <r-390 at mailman.qth.net>
>> To: Steve Toth <stoth47 at yahoo.com>, Bill Abate <wabate at verizon.net>,
>> R-390 <R-390 at mailman.qth.net>
>> Subject: Re: [R-390] This may be of help to someone
>> Message-ID:
>> <389909009.1218069.1424987395556.JavaMail.yahoo at mail.yahoo.com>
>> Content-Type: text/plain; charset=UTF-8
>>
>> Hi, Bill,
>> This is an exceptionally well written and informative post. ?There's never
>> a need to apologize for its length, considering the complex topic. ?Please
>> feel to write again.
>> vy 73Norman
>>
>> ------------------------------
>>
>> Message: 4
>> Date: Fri, 27 Feb 2015 11:29:35 -0500
>> From: Roger Ruszkowski <flowertime01 at wmconnect.com>
>> To: stoth47 at yahoo.com, wabate at verizon.net, R-390 at mailman.qth.net
>> Subject: Re: [R-390] This may be of help to someone
>> Message-ID: <14bcbdf29f5-66d4-9617 at webprd-m54.mail.aol.com>
>> Content-Type: text/plain; charset=utf-8
>>
>>
>> Bill,
>>
>> Thank you for taking the effort to repair this receiver.
>> Nice to hear that another receiver is operational again.
>>
>> Roger Ruszkowski AI4NI
>>
>>
>> -----Original Message-----
>> From: Steve Toth via R-390 <r-390 at mailman.qth.net>
>> To: Bill Abate <wabate at verizon.net>; R-390 <R-390 at mailman.qth.net>
>> Sent: Thu, Feb 26, 2015 3:02 pm
>> Subject: Re: [R-390] This may be of help to someone
>>
>>
>> BillGood job at logically overcoming a compound problem - especially the
>> extra
>> long RF assembly mounting screw piercing the wiring harness! - Steve
>> "Always
>> look for a positive solution then Improvise, Adapt, and Overcome"
>> A veteran -
>> whether active duty, retired, National Guard or Reserve - is someone who,
>> at one
>> point in his or her life, wrote a blankcheck made payable to "The United
>> States
>> of America" for an amount of "up to and including my life."
>>
>> From: Bill
>> Abate <wabate at verizon.net>
>> To: R-390 <R-390 at mailman.qth.net>
>> Sent: Thursday,
>> February 26, 2015 10:56 AM
>> Subject: [R-390] This may be of help to someone
>>
>>
>> After repairing and aligning (I dislike the word 'restoration') four
>> other
>> R-390A's I thought another would be no biggie. I bought my fifth
>> a few years
>> ago at a great price and then put it on the shelf for a
>> future project after
>> doing some cleaning and degreasing. Recently I ran
>> out of 'round to's and
>> remembered the 390A. After a power up with no
>> smoke I put in the missing tubes
>> and connected a speaker. Zipo!
>> Nothing! A close inspection showed that the
>> megacycle knob did not turn
>> all the related gears. A gear clamp was broken.
>> Darn! Now I had to
>> mess with the gear train to get at that clamp. Even worse,
>> a magnifying
>> glass and flashlight showed six more broken clamps!
>>
>> After hours
>> of machine work I fabricated some replacement clamps. I
>> replaced the clamps
>> and reassembled the gear train. Darn, the gears
>> were still slipping. Turns
>> out the gear (#48) was slipping but the
>> clamp was tight. Removed the gear and
>> found the hub to gear connection
>> was a cold solder joint. Yes, its called out
>> in the military manual as
>> a soldered gear (its not tin/lead solder). Did not
>> expect that! I was
>> worried about the heat damaging the gear if I tried to
>> resolder it since
>> it is tempered steel but I could not come up with a better
>> idea. I dug
>> out my low temperature silver solder and oxyacetylene torch. The
>> gear
>> repair turned out well. I did not give it a complete fillet as original
>>
>> since I wanted to keep the heating time to a minimum. The gear did warp
>>
>> slightly despite being tacked in just two places but it still was
>> usable.
>> Evidently the gorilla who worked on the gear train before me
>> kept tightening
>> the clamps until they broke when he could not stop the
>> gears from slipping.
>> Brawn instead of brains!
>>
>> Next problem was to synchronize the gear train. When
>> the broken clamps
>> allowed some of the gears to slip on their shafts it became a
>> giant
>> Rubik's Cube. I never felt the need to disassemble a gear train before
>>
>> so this was all new to me. I set the cams where they belonged at 7 +000
>> but
>> then found out the bandswitch was not synchronized. I found the
>> section on
>> synchronizing the 6 position RF bandswitch that showed you
>> get a 56K resistance
>> between two points (page 110 of TM 11-5820-358-35)
>> when at 7 +000 setting. So
>> I loosened the gear on the band switch shaft
>> and rotated the switch shaft until
>> I got the 56K reading and then an
>> infinite reading when switched to 8 MHZ. You
>> must satisfy both
>> requirements. When that got satisfied I reassembled the rig
>> but I still
>> could not get the radio to align. Turns out there is more than one
>>
>> shaft position that satisfies the test. After studying the schematic it
>> turns
>> out the easiest way to synchronize the band switch is to look at
>> the rear wafer
>> and verify B+ to the 17 MHz oscillator when in the 00 to
>> 07 positions. Finally
>> got it right. After dropping the front panel and
>> removing the RF subchassis
>> more times than I care to admit, I found I
>> still could not align the radio. I
>> neglected to align the switch gear
>> assembly (#87). I could not find explicit
>> alignment instructions in the
>> manual other than to use figure 68. I carefully
>> positioned the bottom
>> cogs with the vertical centerline of the gear and finally
>> got the radio
>> to align properly! It took me over a week to diagnose and fix
>> these
>> problems. Yeah, I'm slow.
>>
>> Thought I was done at this point but the
>> audio did not sound right. It
>> passed the tests for the AF module but it just
>> wasn't right. Playing
>> around with various settings I discovered that turning
>> off the noise
>> limiter made the audio louder and better. HUH? Found no B+
>> getting to
>> the noise limiter tube plates. Pulled the AF module and the
>> switched
>> RF-IF B+ was there but the line to the noise limiter switch was
>>
>> grounded. Could not find anything bad in the module so I disconnected
>> the
>> multiconnector plug and the ground disappeared. So it was in the
>> wiring
>> harness. Figured the switch on the noise limiter was bad. But
>> it was fine.
>> YUK! How do I find a short in the fully laced harness?
>> Well dumb luck
>> prevailed. When I moved the harness in a certain
>> location, the ground
>> disappeared. Turns out it was right next to the
>> PTO. Now this might help
>> someone. Somebody put an extra long screw
>> through the frame that holds the RF
>> assembly in place at that location.
>> The harness is on the other side of that
>> screw. Sure enough the screw
>> pierced the wire insulation at that point and
>> shorted that wire to
>> ground! Replaced the screw with a shorter one and added
>> some electrical
>> tape and all is well.
>>
>> Sorry this got to be so long but it
>> might help someone else. I could
>> not find something similar on synchronization
>> but if this has been
>> covered before, my apologies.
>>
>> Bill,
>> K3PGB
>> ______________________________________________________________
>> R-390
>> mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/r-390
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>> http://mailman.qth.net/mmfaq.htm
>> Post: mailto:R-390 at mailman.qth.net
>>
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>> hosted by: http://www.qsl.net
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>>
>>
>>
>> ______________________________________________________________
>> R-390 mailing
>> list
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>>
>>
>> ------------------------------
>>
>> Message: 5
>> Date: Fri, 27 Feb 2015 09:46:01 -0800
>> From: David Wise <David_Wise at Phoenix.com>
>> To: Roger Ruszkowski <flowertime01 at wmconnect.com>, "stoth47 at yahoo.com"
>> <stoth47 at yahoo.com>, "wabate at verizon.net" <wabate at verizon.net>,
>> "R-390 at mailman.qth.net" <R-390 at mailman.qth.net>
>> Subject: Re: [R-390] This may be of help to someone
>> Message-ID:
>> <FFF45F8A4E2B6F4CA4920B3B028CE73D154D464644 at SCL-ExchMB.phoenix.com
>>>
>> Content-Type: text/plain; charset=WINDOWS-1252
>>
>> Yep, the man did it with style.
>>
>> Dave
>>
>> ________________________________________
>> From: R-390 [r-390-bounces at mailman.qth.net] On Behalf Of Roger Ruszkowski
>> [flowertime01 at wmconnect.com]
>> Sent: Friday, February 27, 2015 8:29 AM
>> To: stoth47 at yahoo.com; wabate at verizon.net; R-390 at mailman.qth.net
>> Subject: Re: [R-390] This may be of help to someone
>>
>> Bill,
>>
>> Thank you for taking the effort to repair this receiver.
>> Nice to hear that another receiver is operational again.
>>
>> Roger Ruszkowski AI4NI
>>
>>
>> -----Original Message-----
>> From: Steve Toth via R-390 <r-390 at mailman.qth.net>
>> To: Bill Abate <wabate at verizon.net>; R-390 <R-390 at mailman.qth.net>
>> Sent: Thu, Feb 26, 2015 3:02 pm
>> Subject: Re: [R-390] This may be of help to someone
>>
>>
>> BillGood job at logically overcoming a compound problem - especially the
>> extra
>> long RF assembly mounting screw piercing the wiring harness! - Steve
>> "Always
>> look for a positive solution then Improvise, Adapt, and Overcome"
>> A veteran -
>> whether active duty, retired, National Guard or Reserve - is someone who,
>> at one
>> point in his or her life, wrote a blankcheck made payable to "The United
>> States
>> of America" for an amount of "up to and including my life."
>>
>> From: Bill
>> Abate <wabate at verizon.net>
>> To: R-390 <R-390 at mailman.qth.net>
>> Sent: Thursday,
>> February 26, 2015 10:56 AM
>> Subject: [R-390] This may be of help to someone
>>
>>
>> After repairing and aligning (I dislike the word 'restoration') four
>> other
>> R-390A's I thought another would be no biggie. I bought my fifth
>>
>>
>>
>> ------------------------------
>>
>> Message: 6
>> Date: Tue, 10 Mar 2015 17:14:20 +1100
>> From: Pete Williams <jupete at internode.on.net>
>> To: r-390 at mailman.qth.net
>> Subject: [R-390] What's happened .......?
>> Message-ID:
>> <CANZavbii6nXw6k3ycr39WRRkoJn4-efCM3rfTJYmN8coNA=
>> C9A at mail.gmail.com>
>> Content-Type: text/plain; charset=UTF-8
>>
>> ? What's happened to the R-390 list...... haven't had a signal for
>> weeks.....checked my spam and trash files too.
>> What gives ?
>> Cheers
>> Pete VK3IZ
>>
>>
>> ------------------------------
>>
>> Subject: Digest Footer
>>
>> _______________________________________________
>> R-390 mailing list
>> R-390 at mailman.qth.net
>> http://mailman.qth.net/mailman/listinfo/r-390
>>
>>
>> ------------------------------
>>
>> End of R-390 Digest, Vol 131, Issue 1
>> *************************************
>>
> ______________________________________________________________
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