[Elecraft] K3 suddenly dies

[Gary, W7TEA]

Thank you Hisashi!  I called Astron and they quoted $26US including shipping.

Gary


On Oct 17, 2013, at 2:26 PM, "Hisashi T Fujinaka [via Elecraft]" <ml-node+s365791n7579982h7 at n2.nabble.com> wrote:

> I have an Astron 35A and was fishing around for details and found a guy 
> who talked about replacing the circuit board. I'm not sure it's 
> necessary, but here's the link: 
> 
> http://www.repeater-builder.com/astron/pdf/w5bwc-rs35-rebuild.pdf
> 
> On Thu, 17 Oct 2013, Gary, W7TEA wrote: 
> 
> > I have had the board off a couple of times to reseat and then to change out the voltage reg IC and to 
> > adjust the trimmer.  I have done a visual inspection but will check that all hardware is 
> > securely fastened.  May have to invest in another assembled board if nothing else works. 
> > 
> > Thank you all for the ideas. 
> > 
> > Gary W7TEA 
> > 
> > 
> > On Oct 17, 2013, at 12:38 PM, "Vic K2VCO-2 [via Elecraft]" <[hidden email]> wrote: 
> > 
> >> Sometimes the screws holding the board to the capacitors loosen up after a few years. 
> >> 
> >> On 10/17/2013 7:14 AM, Gary, W7TEA wrote: 
> >> 
> >>> Good morning Don.  The PS suddenly died on me at our beach house in Long Beach.  I had 
> >>> no equipment there and first assumed it was my K3.  Brought the rig home to Portland 
> >>> and it worked fine.  So, it was the supply, an Astron RS35A--couple years old. Anyway, 
> >>> checked the fuse, cleaned contacts etc and it was .8v at the terminals. .  So, I 
> >>> replaced the voltage IC which I got from Mouser and used Deoxit on the the voltage 
> >>> adjustment pot.  I have another RS35A which has run fine for over 30 years. 
> >>> 
> >>> I don't feel comfortable playing around inside a live supply but will take the cover 
> >>> off and do another visual inspection while unplugged. It has to be something simple I 
> >>> would think. 
> >>> 
> >>> thanks Don,  Gary W7TEA 
> >>> 
> >>> 
> >>> 
> >>> 
> >>> On Oct 17, 2013, at 5:42 AM, "Don Wilhelm-4 [via Elecraft]" 
> >>> <[hidden email]> wrote: 
> >>> 
> >>>> You did not show any of the prior information (one of the problems with posts from 
> >>>> Nabble), so I can only guess that you are working with a power supply problem. A 
> >>>> situation like that is often caused by something loose in the negative side of the 
> >>>> supply, something that is frequently overlooked. 
> >>>> 
> >>>> 73, Don W3FPR 
> >>>> 
> >>>> On 10/17/2013 1:54 AM, Gary, W7TEA wrote: 
> >>>>> Well, traded out the voltage regulator IC and no joy.  Then I tried Deoxit on the 
> >>>>> adjustment pot, tweaked it a bit and measured voltage at 13.8vdc! Great! Turned it 
> >>>>> off and on, tried it again, and was ready start bragging to the XYL---but it was 
> >>>>> back to .8v.  Didn't see any suspect components while I had it open. 
> >>>>> 
> >> 
> >> -- 
> >> Vic, K2VCO 
> >> Fresno CA 
> >> http://www.qsl.net/k2vco/
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> >> NAML 
> > 
> > 
> > 
> > 
> > 
> > ----- 
> > 73, 
> > 
> > Gary W7TEA  K3 #1001, #5763 
> > -- 
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> -- 
> Hisashi T Fujinaka - [hidden email] 
> BSEE(6/86) + BSChem(3/95) + BAEnglish(8/95) + MSCS(8/03) + $2.50 = latte 
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-----
73,

Gary W7TEA  K3 #1001, #5763
--
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