sb-230 re-tube

[Larry Gauthier]

This was the first that I had heard of the 8873 being discontinued. As far
as I know, the 8873 is still being manufactured by Eimac, but is just bloody
expensive. Reatil price for a new tube a month ago (when I last checked) was
$625.

-larry gauthier
wb8bgo

-----Original Message-----
From: Bill Crowell <bcrowell at EXCITE.COM>
To: HEATH at LISTSERV.TEMPE.GOV <HEATH at LISTSERV.TEMPE.GOV>
Date: Friday, June 18, 1999 11:35 AM
Subject: Re: sb-230 re-tube


>Bob, W9YA, asked me to post this for him (Bob, I had the same problem
>posting.  Check to make sure your ISP account name is the same as your
>listserv name.  That turned out to be my problem):On Fri, 18 Jun 1999
>06:05:19 -0500, mouse at carlnet.org wrote:
>
>> I'm sorry but for silly reasons I can lurk the list as a bona-fide
>> list member but can't post anything. If you'd like to post this for me;
>> f.b.
>>
>> Anyways, about your question. The 8874 and the 8873 are the same
>> tube, the only difference being the 'press fit' anode cooler. The press
>> fit
>> is just that, the tube is cooled and the anode cap is heated then they
>> are
>> put together!!.. I have this on GREAT authority, one of the engineers
>> that
>> work(ed) at EIMAC in private correspondence.
>>
>> So, since the 8873 has now been discontinued, maybe if there is a way
>> to get the anode cooler off of a dude tube, and a way to get the same
>> off of a 8874 without damaging it, then.......
>>
>> BTW; yes I know that the dissapation ratings for the tubes are
>> different.
>> But that is DIRECTLY related to the cooling effectiveness of the two
>> methods. (Three is you include the 8875, which again is the same tube
>> with a different anode cooling assembly)
>>
>> ******Please let me know what, if anything else, you find out about
>> this project. I am VERY interested.
>>
>> Tnxs agn es best 73
>>
>> Bob Finch
>> w9ya at amsat.org
>Bob, you know, I just don't think I want to fool around with the 887X tube
>family anymore.  Too expensive and scarce.  Wouldn't it be better to design
>a mod for the SB-230 to use a 4CX250 instead?  Tell me if I'm 'way wrong
>about that possibility.  Bill
>>
>
>
>
>
>
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