[ForSale-Swap] Shorty 3-400Zs

[Carl]

I overhauled one of those Johnson Viking Thunderbolt II's a few years ago 
for a customer and the original tubes still put out 1200W even on 10M. The 
RF section looks built for 3KW+

What a PITA amp to work on tho. The transformer had leakage, the mains relay 
was arced, the 24VDC supply was zapped. It took a lightning hit.

Carl
KM1H

----- Original Message ----- 
From: "Ron Trepka" <w8ron at sbcglobal.net>
To: <forsale-swap at mailman.qth.net>
Sent: Wednesday, February 23, 2011 9:38 AM
Subject: [ForSale-Swap] Shorty 3-400Zs


These were my spares for a TEMPO 2000 desktop amp that has been traded some 
time ago. The receiver of the amp decided to not take the spares although I 
told him of the issue.

I never really needed these as the original tubes never went bad. They are 
the 3-400Z version that does not have the base or the pin plate and are 
therefore about 1/2 inch shorter than the 3-400Z or 3-500Z that are almost 
exactly the same height. These were the only ones that would fit into that 
amp and are EXTREMELY difficult to find.

I am not exactly sure of the manufacture but these tubes were made 
pre-Nixon.
I suspect $200 for a pair is about the going price including shipping.
---
Ron

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