With these tubes in such short supply, it may be necessary to modify the amp
to run different finals. My guess would be a pair of GU74b's, which would
require a bit of metal work in the box, but they run off the same filament
voltage and similar plate voltage. Some photos inside the chassis
(http://www.hamradiomarket.com/Articles/TenTecTitan%20II.htm) suggest that
there might be enough room to squeeze a pair in.
Word is that the GU74b's may be going into short supply soon, too.
Ron Castro
Chief Technical Officer
Results Radio, LLC
N6IE
www.N6IE.com
----- Original Message -----
From: "Duane Calvin" <ac5aa1@gmail.com>
To: <geraldj@storm.weather.net>; "'Discussion of Ten-Tec Equipment'"
<tentec@contesting.com>
Sent: Saturday, May 31, 2008 12:11 PM
Subject: Re: [TenTec] 4CX1600B
A better search might be Svetlana and GU91B. We all miss Tom Hix, who
supplied many of these, but the GU91B's were in very short supply when the
Titan II and the Alpha amp were designed.
73, Duane
Duane Calvin, AC5AA
Austin, Texas
www.ac5aa.com
-----Original Message-----
From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]
On Behalf Of Dr. Gerald N. Johnson
Sent: Saturday, May 31, 2008 2:00 PM
To: tentec@contesting.com
Subject: Re: [TenTec] 4CX1600B
On Sat, 2008-05-31 at 10:11 -0700, Michael Zeglen wrote:
Does any one know where I might find a replacement tube for the Ten Tec
Titan II? It is my understanding that the GU-91B will work as a
replacement.
I have tried RF Parts, Ten Tec and Penta Labs but NO LUCK. I know someone
has to have one laying around somewhere.
MIKE - KL7ai
google showed:
http://www.sed-usa.com/index.asp?strType=Content&strPage=4CX1600B
http://www.garant-funk.com/svetlana/4CX1600B.html
But this post says it wasn't available in 2003 already.
http://chat.qth.com/viewtopic.php?
p=861&highlight=&sid=0f2da7248b3e2bb78455b0104184d8f7
But:
http://www.tube-shop.com/uk/prod_industrial_detail.asp?
ProductID=332&ProcessType=20
says its in stock, in England. Sit down before you check the price and
shipping in dollars.
Though the price at the US location is a little better:
http://www.tube-shop.com/usa/prod_industrial_detail.asp?
ProductID=332&ProcessType=20
http://www.ivaza.cz/cs/files/folders/tubes_data/entry116.aspx says its
no longer made.
I saw hints that Alpha has also used the tube so there might be a chance
they have spares.
There may be more to be found, but I just looked at the first 100 of
1620 google hits searching for 4CX1600B.
73, Jerry, K0CQ
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