[Boatanchors] Tektronix Type W Plug-In Unit

[eldim at att.net]

Silly me-where was my brain? The Tek 500 Series wasn't in production until the 60's.  Must have been to much pot luck at the ole church house tonight.  
Let's see, let me reassess this. How about 48th week of 1965, or could have been 1975, but I'll give it a 1965 date of manufacture.  I don't think they were in production.  The Tek PN for this tube is 154-0417-00.



-------------- Original message from "Lawrence Mayhew" <lmayhew4 at comcast.net>: -------------- 


> Sorry Glen, the numerals on the Nuvistor are not date codes. The Nuvistor 
> was introduced in 1959. 
> Regards,............Larry in Seattle 
> 
> -----Original Message----- 
> From: boatanchors-bounces at mailman.qth.net 
> [mailto:boatanchors-bounces at mailman.qth.net]On Behalf Of eldim at att.net 
> Sent: Tuesday, September 27, 2005 8:56 PM 
> To: n2lxm at juno.com; boatanchors at mailman.qth.net 
> Subject: Re: [Boatanchors] Tektronix Type W Plug-In Unit 
> 
> 
> Hello Jeff, 
> The NUVISTOR Electron Tube that you have is a Type 8056 "Triode" most likely 
> manufactured by RCA. 
> The TEK TYPE "W" is an Oscilliscope Plug-In Module designed to fit the 
> Tektronix 500 Series Oscopes. It is a Differential Comparator or 
> Pre-Amplifier Vertical Plug-in usable up to 23 MHz Bandwidth. You could 
> also use it in the TEK clones such as the Lavoie LA-545 Oscopes or other 
> equivalents series oscopes. You can find SIEMENS Data Sheets on this Triode 
> Nuvistor at Frank's Tube Data Sheets. It has a 6.3 Volt Filament. Date Code 
> was May 1948. 
> 
> Best regards, 
> Glen Galati, KA7BOJ 
> Tacoma, WA 
> eldim at att.net 
> 
> 
> -------------- Original message from n2lxm at juno.com: -------------- 
> 
> 
> > Tektronix Type W Plug-In Unit 
> > 
> > High Gain Differential Comparator 
> > 
> > 
> > Greeting's All, 
> > 
> > Can any one shed some light on a two-tube device used in the Tektronix 
> > plug-in. 
> > It's a small oblong device mounted on a floating sub chassis and appears 
> > tube house two RCA Nuvistor tubes. I was able to remove the tubes from 
> > their holder; the only markings are as follows. 
> > 
> > RCA Nuvistor 5-48 ( date code I think ) 
> > 
> > 167 079 (printed in ink on the top) 
> > 
> > 8056 330 (stamped into the metal on top) 
> > 
> > Dose Anyone have a way of or know what tubes this is. Any and all help 
> > will be greatly appreciated. Thank You. 
> > 
> > Jeff N2LXM 
> > American 
> > Patriot 
> > Amateur Radio Operator 
> > Proud Father of Two U.S. Marines 
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> > 
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> $$ For vintage radio info, see the HCI web site $$ 
> http://www.w9wze.org 
>