Thanks for that info John.
Carl
KM1H
----- Original Message -----
From: "John Lyles" <jtml@losalamos.com>
To: <amps@contesting.com>
Sent: Tuesday, July 06, 2010 5:19 PM
Subject: [Amps] Rebuilding oxide cathode tubes
>I believe the answer is that thoriated tungsten filaments are much easier
>to copy and replace, than oxide cathodes.
> Its my impression that calcium, barium, strontium oxide chemistry is
> somewhat proprietary among tube manufacturers, and to get long life
> requires
> care and very clean conditions.
>
> 73
> John
> K5PRO
>
>
>
> -----Original message-----
> From: amps-request@contesting.com
> Date: Tue, 6 Jul 2010 12:00:37 -0600
> To: amps@contesting.com
> Subject: Amps Digest, Vol 91, Issue 10
>
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>> Today's Topics:
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>> 1. Re: Rebuilt tubes (Carl)
>>
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>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Tue, 6 Jul 2010 14:42:46 -0400
>> From: "Carl" <km1h@jeremy.mv.com>
>> Subject: Re: [Amps] Rebuilt tubes
>> To: "AMPS" <amps@contesting.com>, "Bill Fuqua" <wlfuqu00@uky.edu>
>> Message-ID: <017c01cb1d3b$08d69e30$6501a8c0@DAVES>
>> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>> reply-type=original
>>
>> I wonder why there are no cathode type tubes in that list?
>>
>> Cant be done or not economically?
>>
>> Since I have 3 full output 3CX1000A7's I guess Im set for awhile. One is
>> in
>> the 2M amp
>>
>> Carl
>> KM1H
>>
>> ----- Original Message -----
>> From: "Bill Fuqua" <wlfuqu00@uky.edu>
>> To: "AMPS" <amps@contesting.com>
>> Sent: Tuesday, July 06, 2010 2:22 PM
>> Subject: [Amps] Rebuilt tubes
>>
>>
>> > Look at
>> > http://www.cpii.com/docs/related/23/Tube%20Ratings%20Data%20for%20Devices%20Rebuilt%20by%20ECONCO.pdf
>> >
>> > It appears that ECONCO does rebuild some tubes as low as 1000 Watt
>> > plate
>> > dissipation but only the rarer industrial, medical or scientific types.
>> > I suspect that if they did 8877's they would be over run by ham and
>> > CBers
>> > and would not be able to take care of the other customers. I had a
>> > 3CW20,000 rebuilt one time for a sputtering power supply.
>> > You can always ask if they will rebuild it.
>> >
>> >
>> > 73
>> > Bill wa4lav
>> >
>> > _______________________________________________
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>> > Amps@contesting.com
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>>
>>
>>
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