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tabbypurr@gmail.com: Jul 25 02:20PM -0700 On Friday, 21 July 2017 01:26:30 UTC+1, tabby7 wrote: > so will just soak it in solvents & bake & see what happens. Access is a mare but should be able to drip onto it, probably with a fair bit missing the thing, but kero & alcohol are harmless enough.   > thank you > NT   Well, the 530-2 is no better despite soak time with paraffin. The 1960s instruction manual recommends petrol for this situation.     NT

Mike Coon <gravity@mjcoon.plus.com>: Jul 25 11:33PM +0100 In article <05717ef7-b17a-41c4-af45-7b0d871dc138@googlegroups.com>, tabbypurr@gmail.com says...   > Well, the 530-2 is no better despite soak time with paraffin. The > 1960s instruction manual recommends petrol for this situation.   And full immolation?   Mike.

tabbypurr@gmail.com: Jul 25 03:44PM -0700 On Tuesday, 25 July 2017 23:33:38 UTC+1, Mike Coon wrote: > > 1960s instruction manual recommends petrol for this situation.   > And full immolation?   > Mike.   lol. It doesn't mention any possible risk so yay let's go for it.     NT

"pfjw@aol.com" <pfjw@aol.com>: Jul 25 06:20PM -0700 Whyizzzit that one feels limited to using 1960s methods on 1960s machines?   It is 2017. We have means and methods that were not even dreams back in the day. Use them!   Peter Wieck Melrose Park, PA

Jeff Liebermann <jeffl@cruzio.com>: Jul 26 09:11AM -0700 >Well, the 530-2 is no better despite soak time with paraffin. >The 1960s instruction manual recommends petrol for this situation. >NT   I'm not sure which of the noxious, explosive, corrosive, and cancerous additives found in modern gasoline is considered most hazardous, but I suggest you find something a little less dangerous. Please remember that you have only one life to give for this repair project.   Have you tried penetrating oil (Kroil) to break things loose? My guess(tm) is you're dealing with well hidden rust.   -- Jeff Liebermann jeffl@cruzio.com 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558

"pfjw@aol.com" <pfjw@aol.com>: Jul 26 09:26AM -0700 On Wednesday, July 26, 2017 at 12:11:48 PM UTC-4, Jeff Liebermann wrote:   > Have you tried penetrating oil (Kroil) to break things loose? My > guess(tm) is you're dealing with well hidden rust.   Yeah. Kroil. P-L-E-A-S-E.   Gasoline, diesel, kerosene - all of which are very nasty - are not good options for anything other than internal combustion engines, turbines and lamps. The latter in small quantities, and generally for emergency purposes.   Peter Wieck Melrose Park, PA

lmmcams@gmail.com: Jul 25 11:47PM -0700 Hi, may I ask for some advice? I have an Onkyo 5009 AV Reciever with the very common problem of overheating HDMI board. You can see it just under the grill for cooling in the case. I have an infrared heat sensitive camera and discovered there are several small ic's that get very hot very quickly- i.e. 70-80c. The ICs are very small, 10mmx10mm up to 10mmx16mm and thereabouts but there is space of about an inch above so room for a heat sink maybe? What would you chose to do? Fit heat sinks to those chips(if there are any small enough) or fit fans directly above the board? I'd really welcome your advice.   Steve

John-Del <ohger1s@gmail.com>: Jul 26 04:41AM -0700 > Hi, may I ask for some advice? I have an Onkyo 5009 AV Reciever with the very common problem of overheating HDMI board. You can see it just under the grill for cooling in the case. I have an infrared heat sensitive camera and discovered there are several small ic's that get very hot very quickly- i.e. 70-80c. The ICs are very small, 10mmx10mm up to 10mmx16mm and thereabouts but there is space of about an inch above so room for a heat sink maybe? What would you chose to do? Fit heat sinks to those chips(if there are any small enough) or fit fans directly above the board? I'd really welcome your advice.   > Steve     The ICs can safely run at those temps, but the cooler they run, the longer they should last theoretically. I wouldn't worry about it unless that receiver is known to have failures on that board.   A surprisingly small amount of airflow will reduce the temps more than you might expect. A small fan could cool the whole board at once. I have a collection of small stick-on heatsinks that were used on plasma scan ICs that I keep for projects. A tiny drop of heat sink compound and a bit of clear RTV on the corners will locate the heat sinks down.

"pfjw@aol.com" <pfjw@aol.com>: Jul 26 04:53AM -0700 >> A tiny drop of heat sink compound and a bit of clear RTV on the corners will locate the heat sinks down. <<     WARNING: Be exceedingly cautious with RTV silicon in any electronic application! Conventional materials use Acetic Acid as the catalyst/curing agent, and releases a good deal of it during the process. Acetic Acid attacks copper and many other metals.   Use an ELECTRONIC (Neutral Cure) RTV.   https://www.alliedelec.com/gc-electronics-19-155/70159837/?mkwid=srzNgXKQF&pcrid=30980760979&gclid=Cj0KCQjw--DLBRCNARIsAFIwR25fLPHRGK1Ekfxi-TwPx_i68BY5GgpTF--jqXtQxu32NH3k6vQjp3EaAicDEALw_wcB     Peter Wieck Melrose Park, PA

"~misfit~" <shaun.at.pukekohe@gmail.com>: Jul 26 06:21PM +1200 Once upon a time on usenet Phil Allison wrote: > IR laser light travels and extra half wavelength causing self > cancellation.   > Go look it up.   All good I'll take your word for it. So it's even more 'black-and-white' w/r/t reflections than I thought with a pressed CD.   > older CD players don't have the laser power needed to get a good > (reflected) > signal. "   Yep, and I stand by it. Notice I said "CDRs..." and not 'the metallised layer inside CRDs...'?   In fact you've just told me that the whole of the underside of pressed CDs is reflective, just that part is 180º out of phase with the rest when read with a CD laser. That's certainly not the case with CDRs.   >> scare others off so you can have the last say. Funny how it always >> happens in the evening   > ** The one being obnoxious here is you - pal.   Not exactly true but, if it was, it would make a change eh? -- Shaun.   "Humans will have advanced a long, long way when religious belief has a cozy little classification in the DSM*." David Melville (in r.a.s.f1) (*Diagnostic and Statistical Manual of Mental Disorders)

Phil Allison <pallison49@gmail.com>: Jul 25 11:57PM -0700 ~misfit~ bullshitted:   -----------------------       > > cancellation.   > > Go look it up.   > All good I'll take your word for it.   ** So you never had a clue how CDs work ?   > So it's even more 'black-and-white' > w/r/t reflections than I thought with a pressed CD.     ** Wot a desperate bullshit artist you are.       > > (reflected) > > signal. "   > Yep, and I stand by it.     ** You are standing on quicksand - pal.     > Notice I said "CDRs..." and not 'the metallised > layer inside CRDs...'?   ** Shame how nothing else is reflective.   Wot a bullshitter.       > > ** The one being obnoxious here is you - pal.   > Not exactly true but,   ** It is precisely the truth.   Fact is, you have no interest in the truth.       ..... Phil

"~misfit~" <shaun.at.pukekohe@gmail.com>: Jul 26 06:26PM +1200 Once upon a time on usenet GattoNero wrote:   > mmm really, sir, my english knowledge is not so good to appreciate if > this is a sarcastic phrase or some coloured way of saying > somethings... Can you explain better what are you talking about?     In English the phrase "from the horse's mouth" means from the true source. So to go to the 'horse's mouth' in this case would mean to go to the manufacturer.   Good luck, -- Shaun.   "Humans will have advanced a long, long way when religious belief has a cozy little classification in the DSM*." David Melville (in r.a.s.f1) (*Diagnostic and Statistical Manual of Mental Disorders)

"Ian Field" <gangprobing.alien1@virginmedia.com>: Jul 25 09:00PM +0100 <jurb6006@gmail.com> wrote in message news:ffa9306f-11b2-4f30-9947-6b3eb5501f49@googlegroups.com... > hard to get a damper diode for because it was such high current. But not > an RCA. But you said RCA tubes, that is not the fault of the tubes. It is > the fault of the engineers.   I only ever encountered the low voltage flyback system with certain RCA tubes - and it was largely dictated by the design of the bonded on scan yoke.

"Ian Field" <gangprobing.alien1@virginmedia.com>: Jul 25 09:07PM +0100 <tabbypurr@gmail.com> wrote in message news:098a8905-0b92-4ef4-af0d-908b30257a14@googlegroups.com... > voltage instability caused picture height instability.   > I liked those sets as they were well valued but CRT emission tended to go. > No-one else had worked out how to get the emission back, I did.   With monitors - I discovered that some 'genius' at Philips had published a bulletin stated that stable SMPSUs meant CRT heaters only needed 6.15V. Most manufacturers fell for it, and most CRTs ended up with poisoned cathodes.   There was plenty of evidence that some engineers were just turning the wick up in the PSU. My solution was to fit a Shottky-barrier heater rectifier, that needed an added snubber to prevent the flyback peaks killing the rectifier, and improvements to the filter circuit. Some already had Sb rectifier, so there wasn't much I could do.

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