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Anode Cap Fits 3-500z, 3-500zg,4-400,4-400a HIGH EFFICIENCY

Your Price: $49.95
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Part Number:ac500zHE
This anode cap fits 3-500z, 3-500zg4-400,4-400a . It greatly improves the cooling. Pictured is a stock style anode cap vs ours for comparison. This is the HIGH EFFICIENCY version.


5 Stars
Came across a YouTube video showing the cooling efficiency of this plate cap vs a standard cap. I was concerned about the 3-500ZG in my SB-1000. Good tubes are not cheap and I wanted to protect the one in this amp. I spend a good amount of time on 40 and 80 meters and run the amp pretty hard (especially when running digital) so I watch the tube color pretty close. I changed to this anode cap and notice the cooldown is faster as well as the operating temp. This amp does not use a chimney so I am trying to hedge my bets by adding as much cooling as possible without amp mods. Anyway you can extend the life of a tube is usually worth it.
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Reviewed by:  from Illinois. on 10/30/2020
4 Stars
Good product
Installed these in a Viking Thunderbolt linear using (2) 4-400A tubes. Was concerned about height interference, but these are actually lower in height than the original factory caps and fit fine. A little tight fit on the caps, but moving them back and fourth on the tube cap made more clearance so thermal compound could be put in for even better efficiency.
Did you find this helpful?  1 of 1 Found Helpful
Reviewed by:  from New England. on 10/12/2021

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