Subj : 555 - love the comments!
To   : Ed Vance
From : Barry Martin
Date : Fri Dec 20 2024 07:23:00


Hi Ed!

 > was repair.  Ever see a 7 W resistor glow red?  About the diameter of a
 > cigarette and this one was probably 2 to 2.5" long.  A filter cap had
 > failed, dumping all the 'juice' across this resistor and another one
 EV> That ther glowing power resistor was actually doing its job.
 EV> It was good whereas the condenser was bad .
 EV> But both probably got replaced.
 EV> Schematic(s) are a necessity.
 EV> Howard Sam's Photofacts save the day.

Yes, I had purchased several Sam's Photofacts: made diagnoses and repair
a lot easier, identified the parts, plus occasionally corrected the 
manufacture's version.  (For those with no history, occasionally the 
manufacturer would publish an older version of their schematic but sell 
products which were updated.)


 EV> The device I couldn't name was a plastic piece with holes in it
 EV> to insert
 EV> wiresor IC pins in .
 EV> I know I could get up and grab a old Radio Shack Catalog to see
 EV> the name of it
 EV> but just too lazy to stop tapping on this phone to do that.

"IC socket"? 


 EV> This Scotchman rather drink RC Cola than alcoholic beverages.

I never drank that much and for some reason after breaking my femur a
few years back I barely drink.  No restrictions, just no desire.  If I
get offered a glass of wine I'll drink it.


 EV> Speaking of Radio Shack, years ago (B4 using phone) I found a URL
 EV> that had
 EV> Radio Shack Catalogs images of the pages.
 EV> Also found a URL that had Allied Radio Corp. Catalog pages.
 EV> I still have my 1959 Allied catalog.
 EV> I had seen a 1958 catalog that had a photo of a satellite in a
 EV> transparent
 EV> casebut when I ordered mine in the Fall of 1958 They mailed a
 EV> 1959 catalog.
 EV> It had Collins Radio "S" Line gear in it .
 EV> I think that was the first year Collins sold that series of gear.

Their cataloge was handy as a reference: for example (poor one!) I knew 
of the 1N4001 -- 50 v PIV -- but my project has a higher voltage.  
Initially might think put a few in  series to add up the voltages, or 
maybe parallel.  Ooo! 1N4005 will take care of my problem! 


                     ¯                                 ®
                      ¯  BarryMartin3@MyMetronet.NET  ®
                     ¯                                 ®


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