OFF TOPIC QUESTION.

[Wilson Lamb]

Back when Earth was young, everyone wanted WE 417As for vhf preamps.  Does 
anyone know how they compare to a modern SS front end??  Had a gold grid, I 
think.  Was that snake oil?
Wilson
W4BOH
----- Original Message ----- 
From: "Peter A Markavage" <pmarkavage at JUNO.COM>
To: <HEATH at LISTS.TEMPE.GOV>
Sent: Monday, November 03, 2008 12:20 PM
Subject: Re: OFF TOPIC QUESTION.


> 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
>
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