[Amps] 4CX1000A (General Electric)

[Carl]

Yes, the 6948 is the date code but the other is not decipherable at the 
moment.

The code for GE is 188, 162 for Eimac, 274 for RCA, etc and none of any 
listed are in that other number.

I'll ask around.

Carl
KM1H



----- Original Message ----- 
From: "Roger Dixon" <lists at irdixon.plus.com>
To: <amps at contesting.com>
Sent: Monday, January 30, 2012 1:24 PM
Subject: Re: [Amps] 4CX1000A (General Electric)


> Thanks for the replies
>
> There are two codes on the tube, 08594 and 6948.  I've been told that the
> second is probably the date code (week 48 in 1969 ?) but I have been 
> unable
> to cross reference the first to a manufacturer.
>
> Roger - G4BVY.
>
> -----Original Message-----
> From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
> Behalf Of Carl
> Sent: 27 January 2012 23:17
> To: Roger (K8RI); amps at contesting.com
> Subject: Re: [Amps] 4CX1000A
>
> The 3 didgit EIA code on the tube will tell you who actually built it.
>
> Carl
> KM1H
>
> ----- Original Message -----
> From: "Roger (K8RI)" <k8ri at rogerhalstead.com>
> To: <amps at contesting.com>
> Sent: Friday, January 27, 2012 4:23 PM
> Subject: Re: [Amps] 4CX1000A
>
>
>> On 1/27/2012 3:46 PM, Roger Dixon wrote:
>>> Hi Chaps,
>>> I recently completed my 50MHz 4CX1000A amplifier.  However the Eimac 
>>> pull
>
>>> I
>>> have had for a while suffers from excessive secondary emission.
>> Are you familiar with Tetrode tuning?  At what level of screen current
>> do you start getting secondary emission?
>>
>>>
>>> The question.  I have recently obtained a NOS 4CX1000A.  However, 
>>> despite
>>> being offered as an "Eimac" NOS, both the valve and the original box are
>>> branded General Electric.  Does anyone have any views as to the
>>> quality/specification of a valve such as this that is non Eimac branded?
>> I've not heard of any problems with GE constructed 4CX1000A's. GE has
>> built a lot of high powered tubes in the past and particularly for the
>> military.
>> I'd not be concerned about a GE tube, unless some one comes up with
>> information on a problem with those tubes.
>>
>> 73
>>
>> Roger (K8RI)
>>> TIA
>>> Roger - G4BVY
>>>
>>
>>
>> _______________________________________________
>> Amps mailing list
>> Amps at contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>
>>
>> -----
>> No virus found in this message.
>> Checked by AVG - www.avg.com
>> Version: 10.0.1416 / Virus Database: 2109/4768 - Release Date: 01/26/12
>>
>
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 10.0.1416 / Virus Database: 2109/4776 - Release Date: 01/30/12
>