Identifying vacuum tube module

[Mark J. Blair]

> On Mar 25, 2018, at 12:34, Kyle Owen via cctalk <cctalk at classiccmp.org> wrote:
> 
> Anyone knows what these go to?
> 
> https://imgur.com/a/CpxLs <https://imgur.com/a/CpxLs>

If the 5815 is a Federal Supply Classification, then the module would most likely be used in some sort of teletype or facsimile equipment.

-- 
Mark J. Blair, NF6X <nf6x at nf6x.net>
http://www.nf6x.net/