On Friday, February 23, 2018 at 5:13:54 PM UTC, Jeff Liebermann wrote:
On Fri, 23 Feb 2018 03:26:25 -0800 (PST), Andre Jute
wrote:

I take it the paper slide rules in one of your links were given
away as promotions.

Yes. I used to attend various electronics trade shows. During the
1970's and 80's, it was quite common for vendor to give away such
calculators. Others came for ham fests, coworkers, and trash bins.

It wasn't until the 90s that I took up electronics because my mates at HP and European and Japanese equivalents had risen too high in management to have time to build what I wanted.

I'd pay for one from the Radio Relay League of America, or
the RCA Schools.

Sure. Pick out the one's you want and send me a shipping address.
Please leave me with the radiation, RF, and microwave calculators. The
rest, I don't need or use. You can also find a few on eBay:
https://www.ebay.com/sch/i.html?_nkw=paper+calculator+-roll+-rolls
or various collectors sites (which I can't seem to find right now).

Very generous of you, Jeff, but I wouldn't dream of breaking up your collection on an idle whim. I just wanted those two because I admire the institutions (1); I wasn't actually going to use them because a) I have my cheat sheet written into a convenient Excel spreadsheet of a complete transfer formula I developed (2) and b) I'd already decided to buy the Picket N515-T (the one dedicated to electronics) which you referred to in your earlier post with all those fascinating links; the 515 is so common on Ebay that if I'm patient I'll probably be able to get an NOS or pretty pristine used one.

(1) see the first pic as you scroll down the chapter at http://www.audio-talk.co.uk/fiultra/...dre%20Jute.htm

(2) http://www.audio-talk.co.uk/fiultra/...dre%20Jute.htm

Andre Jute
The kindness of strangers