Predicta - Tube type 21SFA - dangerous? - Videokarma.org TV - Video

		Videokarma.org TV - Video - Vintage Television & Radio Forums > Early B&W and Projection TV
Predicta - Tube type 21SFA - dangerous?

Notices

Time to get this site upgraded, so we are passing the hat around. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html


	We appreciate your help in keeping this site going.

Thread Tools

Display Modes

#12

11-27-2016, 02:06 PM

StellarTV

VideoKarma Member

Join Date: Jan 2007

Location: Sacramento, CA

Posts: 503

SF-21 was just Philco's proprietary part number for their home-grown narrow profile CRT. 21EAP4 was based on the industry standard numbering scheme.

SF stood for Sure Failure.

« Previous Thread | Next Thread »

Posting Rules
You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Forum Rules

Forum Jump

All times are GMT -5. The time now is 06:49 AM.