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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

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