They look like 1960's-style discrete logic to me.
On Tue, Mar 27, 2012 at 4:58 PM, Paul Anderson<useddec at gmail.com> wrote:
I think Colins made a version of the R390 receiver used a lot by the
military (and NSA). Any idea how old they are or
if you can send pics?
Paul
On Tue, Mar 27, 2012 at 5:53 PM, Doug Salot<doug at blinkenlights.com>
wrote:
Anybody know what these were from?
Labled OS28, RS15, and TR57. One of them with the name "Collins."