Tubes are available for sale!


Prices have increased due to a 35% tariff, which we hope is temporary. Tubes are not refundable, and if/when prices go back down there will be no refunds of any type.


We are limiting sales to one purchase of up to 8 tubes every 90 days and 18 KT120 or KT150 tubes every 90 days. Sales limits are subject to change.


Please note that if you have a PrimaLuna, you may end up getting twice the power tube life that other brands get.  In fact, if you are running KT120’s or KT150’s they may well last longer than you do!


Please don't try to trick the system or use a friend’s name, etc. Our systems may block your purchase and you can get blacklisted.  Everyone be nice.


Let us know if you have a large project, we can help you out.


At this time, we are unable to send Russian-made tubes to Canada.


Do not ask our sales people about other tubes! This is all that is available right now.

Gold Lion U77 / 5AR4 New Production Rectifier

  • Sale
  • $75.95
  • Regular price $75.95



No tube sales outside of U.S. and Canada. No freight forwarders. No exceptions.
90-DAY WARRANTY Defective tubes will be replaced with like items only; carefully read the Warranty Policy for exceptions. You are responsible for ordering the correct tube type. TUBES ARE NOT EXCHANGEABLE OR REFUNDABLE UNDER ANY CIRCUMSTANCES Acceptance of our policies, known or unknown to you, is acknowledged by your tube purchase.


Gold Lion U77 / 5AR4

Note: This tube is not suited to PrimaLuna amps.

New production made in Russia. This tube is well-built, smooth, refined, and balanced for the very best high-end audio sound. A great alternative to the typical OEM offerings. Please do not buy this thinking it's going to sound like a NOS Genalex U77... it won't. But... it's also a fraction of the price!