[Boatanchors] 5X4 tube?

[Alex Whitaker]

I've seen 5X4s in a Silvertone and a couple of other things (that I don't remember).....but, Philco did use those a lot.  
 
73,
 
Alex
AA9XY

--- On Tue, 6/22/10, mac <w7qho at aol.com> wrote:


From: mac <w7qho at aol.com>
Subject: Re: [Boatanchors] 5X4 tube?
To: "Kenneth Grimm" <grimm at sbc.edu>
Cc: boatanchors at mailman.qth.net
Date: Tuesday, June 22, 2010, 11:32 PM


>From Sibley:  5U4G w/ pinout scrambled, reportedly to prevent  
substitution of a (lower rated) 5Y3.  Common in (unique to?) '30s  
Philcos

Dennis D. W7QHO
Glendale, CA



On Jun 22, 2010, at 7:49 PM, Kenneth Grimm wrote:

> The 1948 RCA tube manual says that it has the same ratings as the  
> 5U4G.
>
> Ken - K4XL
>
> On Tue, Jun 22, 2010 at 10:38 PM, WW6N <yonglee at yonsei.ac.kr> wrote:
>
>> Does someone know about 5X4 tube?
>> It is not 5v version of 6X4.
>> I could not find any data about it.
>> It is RCA made and has an octal socket.
>> Looks similar to ST type 5R4.
>> de WW6N
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