Some people might recognize the name ETCO - an old time surplus house that, like so many, died in the 1980/90s. Anyway, I found a few of their old catalogs, mostly from around 1982. I used to get these things, and had a good time paging thru these relics, looking up some of the crap I used to buy. Wow, if I could only go back and order more of those tubes... I am done with them...anyone want one for a retro-surplus half-hour good time? Available for postage - $2.00 ought to do it. William Donzelli aw288(a)osfn.org