7 Mar
2014
7 Mar
'14
1:19 p.m.
On Mar 7, 2014, at 11:47 , Chris Elmquist <chrise at pobox.com> wrote:
I went down this path a few years ago [...]
Very interesting! Experimenting with filters may turn into yet another derailment of my
project, just as my interest in cryptographic machines managed to derail into interest in
ink-making...
I saw some NOS RL02 air filters appear on eBay recently, but as I recall they were priced
above what I wanted to pay.
--
Mark J. Blair, NF6X <nf6x at nf6x.net>
http://www.nf6x.net/