[Hallicrafters] Hallicrafters Digest, Vol 129, Issue 1

Fri Oct 3 15:17:05 EDT 2014

http://www.radioantiques.com/mall.html
That one plus the others I sent you.
Bill W2CQ

On 10/3/2014 2:59 PM, hallicrafters-request at mailman.qth.net wrote:
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> Today's Topics:
>
>     1. Re: Radio Trivia (Ron Kolarik)
>     2. OFF TOPIC NATIONAL NC-190 (Dan Cotsirilos)
>     3. SR-2000 and NCL-2000 band switch issues (Jim Liles)
>     4. Voice Of Victory (1944) By Hallicrafters (Bill)
>     5. Re: Voice Of Victory (1944) By Hallicrafters
>        (Duane Fischer, W8DBF)
>     6. S-38 (Bob Sullivan)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sat, 27 Sep 2014 18:37:02 -0500
> From: Ron Kolarik <rkolarik at neb.rr.com>
> To: k9cox at charter.net, 	"hallicrafters at mailman.qth.net"
> 	<hallicrafters at mailman.qth.net>
> Subject: Re: [Hallicrafters] Radio Trivia
> Message-ID: <54274A1E.90004 at neb.rr.com>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Try the nearest assisted living facility......she's either there or
> Forest Lawn :)
>
> Ron
> K0IDT
>
> On 9/27/2014 1:53 PM, k9cox at charter.net wrote:
>> Where can I find Violet now a days?
>>
>>
>>
>>
>>
>>
>>
>
>
> ------------------------------
>
> Message: 2
> Date: Tue, 30 Sep 2014 13:10:12 -0500
> From: "Dan Cotsirilos" <k9dtc at comcast.net>
> Cc: <hallicrafters at mailman.qth.net>
> Subject: [Hallicrafters] OFF TOPIC NATIONAL NC-190
> Message-ID: <EF18115771334C5986C5198F9B6C3169 at DanPC>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> 	reply-type=response
>
> Anyone in the Chicago area interested in a NC-190 that is not very nice? $25
> for parts or complete restoration.
>
> Dan K9DTC
>
>
>
> ------------------------------
>
> Message: 3
> Date: Thu, 2 Oct 2014 13:30:31 -0500
> From: "Jim Liles" <hallicrafterssr2000 at k9axn.com>
> To: <hallicrafters at mailman.qth.net>
> Subject: [Hallicrafters] SR-2000 and NCL-2000 band switch issues
> Message-ID: <2836D61CA413464FAD5597EA2AF38D09 at LILESJLAPTOP>
> Content-Type: text/plain; format=flowed; charset="UTF-8";
> 	reply-type=original
>
> Disclaimer:  I have never seen, owned, or worked on an NCL-2000.  None the
> less, if you read this with an open mind, you will at least find it
> interesting and at best will provide a fix for the most troublesome failure
> in the NCL-2000.
> The band switch on the NCL-2000 was originally made by OAK using coin silver
> or spring hard sterling for contacts and rotor wipers, not silver plated
> copper.  The new Chinese switches are silver plated copper with slotted
> contacts --- Beware.
> If you observe the original contacts they are solid not slotted surface.
> Further, they were rated at slightly over 12 amps and the configuration used
> a pair of contacts combined for 24 amps.  The design by OAK assumed safe use
> at up to 150% of design criteria.  The current carrying capacity of that
> switch is quite adequate for the 2KW transmitters that used them,
> specifically the NCL-2000 and SR-2000.  The notion that the current carrying
> capacity of this switch is inadequate for these amps is misguided.  The only
> way to exceed the switch limits is to run AM in high power mode.  Of course
> doing so is a bit feeble minded and proves that survival is for the fittest.
>
> Do a bit of analysis.  How many have failed when using the 80, 15, and 10
> meter bands?  Very few and that was likely operator error.
> The 40 and 20 meters bands comprise the majority.  Why is that?  The post
> mortem reveals the source of the malady.  The front wafer is almost always
> the apparent starting point with the arcing propagating to the rear wafer.
> In that the front wafer carries less current than the rear and is usually
> the point of failure, doesn?t it suggest that current is not the culprit but
> voltage arcing is responsible?
>
> The SR-2000 uses the same front wafer design and the A level radio had the
> same frailty.  The Hallicrafters engineers had the financial resources to
> fix the problem and all of the release level trials verified the cause,
> voltage arcing!! .  I am certain that the National engineers became aware of
> the problem early but were in too much trouble financially to fix it.  It is
> also very apparent that the service people knew that there was a problem but
> were oblivious of the cause.
>
> The first redesign by Hallicrafters engineers improved the failure rate
> dramatically and the second eliminated the problem, yes using the same
> switch.  There you are, the switch is not the problem but the configuration
> is.  The first redesign occurred in 1967 and the second 1971 four years
> later, about the same time that production ceased.
>
> It is inappropriate to fault the National designers because every power
> engineer at the time using the switch for the same purpose made the same
> error.  The switch was appropriately designed to support the application ---
> just incorrectly configured.
>
> The standard National front wafer can be refitted using the same components
> to equal the first redesign by Hallicrafters and with some thought the
> second and final design by the Hallicrafters engineers.
>
> There is a lot more to this story and if I could put my hands on a
> functioning complete switch I can write what has to be done to replicate the
> first redesign and the second.  If you have one and can temporarily part
> with it, send it out and I?ll write a yellow brick road paper.  Then maybe
> the NCL-2000 switch legend can go to sleep.  The SR-2000 has been reconciled
> long ago.
>
> I solicit questions and conversation but if you feel belligerent please don?t
> respond.
>
> Kindest regards Jim K9AXN
>
>
>
> ------------------------------
>
> Message: 4
> Date: Fri, 03 Oct 2014 08:24:31 -0400
> From: Bill <bmarx at bellsouth.net>
> To: hallicrafters at mailman.qth.net
> Subject: [Hallicrafters] Voice Of Victory (1944) By Hallicrafters
> Message-ID: <542E957F.7070904 at bellsouth.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
>
>
> Long but fascinating with great views of old Hallicrafters radios.
>
> https://www.youtube.com/watch?v=Jps0_2adUvo
>
> Bill W2CQ
>
>
>
> ------------------------------
>
> Message: 5
> Date: Fri, 3 Oct 2014 16:31:17 -0500
> From: "Duane Fischer, W8DBF" <dfischer at usol.com>
> To: "Bill" <bmarx at bellsouth.net>, <hallicrafters at mailman.qth.net>
> Subject: Re: [Hallicrafters] Voice Of Victory (1944) By Hallicrafters
> Message-ID: <003501cfdf51$7175e310$d854e8cc at hpdc5100mt>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> 	reply-type=response
>
> Bill,
>
> I was about to thank you for posting that great tip of the Halli video when
> I somehow managed to send the message! No excuse for old age! Thanks Bill -
>
> ----- Original Message -----
> From: "Bill" <bmarx at bellsouth.net>
> To: <hallicrafters at mailman.qth.net>
> Sent: Friday, October 03, 2014 7:24 AM
> Subject: [Hallicrafters] Voice Of Victory (1944) By Hallicrafters
>
>
>>
>> Long but fascinating with great views of old Hallicrafters radios.
>>
>> https://www.youtube.com/watch?v=Jps0_2adUvo
>>
>> Bill W2CQ
>>
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>
> ------------------------------
>
> Message: 6
> Date: Fri, 3 Oct 2014 14:59:33 -0400
> From: Bob Sullivan <robert at isquare.com>
> To: "hallicrafters at mailman.qth.net" <hallicrafters at mailman.qth.net>
> Subject: [Hallicrafters] S-38
> Message-ID: <216057B2-8B6B-44E2-9297-598C163814B9 at isquare.com>
> Content-Type: text/plain; charset=iso-8859-1
>
> Is anyone making reproduction back covers for the S-38?
>
> 73, Bob
> W?YVA
> http://www.isquare.com/personal_pages/ras-hardware.htm
>
> ------------------------------
>
> Subject: Digest Footer
>
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> ------------------------------
>
> End of Hallicrafters Digest, Vol 129, Issue 1
> *********************************************
>