OFF TOPIC QUESTION.

[Peter A Markavage]

311B:
Pentode tube having indirectly heated cathodes. Small cap for control
grid G1 and small 5-pin base.
Intended for use in carrier telephone systems in regulated battery
offices. Can also be used as audio, carrier, or radio-frequency power
amplifiers where power outputs of approximately 2 watts are required and
where the plate voltage is not in excess of 180 volts
Replaces No. 311A.

This info from the Western Electric Apparatus Card Catalog dated December
31, 1964. 

Pete, wa2cwa


On Mon, 3 Nov 2008 08:29:21 -0500 Chuck W4MIL <cemilton at AOL.COM> writes:
>  Murray,
> 
> This won't be of much help, but I looked the WEco 311B up in Ludwell 
> Sibley's book "Tube Lore".? Only specifications for the 311A are 
> given.? Western Electric sometimes used the same tube number but 
> changed the suffix.? In this case the 311A to a 311B.? Even though 
> the base numbering is the same, often the tube was quite differently 
> electrically.
> 
> Sibley's book is pretty comprehensive, but it doesn't show 
> equivalency for either the 311A or 311B.? In fact, he states the 
> differences between them are "unknown".
> 
> The 311A is also known as a 4311A.? If that's of any help.? I 
> couldn't find references to a 4311A anywhere.
> 
> Someone out there knows the answer for sure.? Hope this doesn't 
> confuse the matter.
> 
> 73
> Chuck
> W4MIL
> 
> 
>  
> 
> 
>  
> 
> -----Original Message-----
> From: Murray Grandy <mgrandy at TELUS.NET>
> To: HEATH at LISTS.TEMPE.GOV
> Sent: Sun, 2 Nov 2008 8:35 pm
> Subject: [HEATH-TEMPE] OFF TOPIC QUESTION.
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> Please forgive of topic but don't know who I could ask this 
> question. Does 
> anyone know if there is an equivelant tube to Western Electric 311B. 
> I found 
> that the WE 310A is similar to 6C6 at least good enough to do a 
> basic test. I 
> would like to test the 311B on my Precise model iii tube tester and 
> that would 
> be the only way I could do it.
> Murray VE7MGY

-----------------------------------------------------------
Products bought, sold or traded here is the responsibility of the
parties involved.  This list and the City of Tempe are not responsible
for losses or misrepresentations of any kind.  Buyer beware!

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.aspx?list=HEATH
To post - HEATH at LISTS.TEMPE.GOV
Archives - http://lists.tempe.gov/archives/HEATH.html