Ken Rad JAN CKR 6SL7GT VT229 Very Rare Vintage Preamp Tubes Tested Excellent

S$ 90.0

FREE shipping with SingPost normal mail. Top up S$4 for Qxpress delivery.

Overseas postage flat rate S$15. Contact us for order. We will create an invoice for your payment in credit card. Combined postage is possible.

  • Very rare – highly sought after.
  • Background is very transparent and overall sound is very clean but musical.
  • One of the top 3 as close as the best American 6SL7GTs one could get.
  • Comes in white box.
  • All vintage tubes come with 1 month warranty.

In stock

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Description

Authentic & Tested. Tubes we sell are ALL tested unless otherwise stated! All tubes are cleaned and well-taken care. Look at the photos for the highly crystal-clear glass and clean pins despite being over half a century old!

FREE shipping with SingPost normal mail. Top up S$4 for Qxpress delivery.

Overseas postage flat rate S$15. Contact us for order. We will create an invoice for your payment in credit card. Combined postage is possible.

For vintage tubes, American tubes offer fantastic performance value for money. The quality these tubes possess is unrivalled compared to today’s reissues without costing such a premium like vintage European counterparts.

Ken-Rad 6SL7GT or VT229 tubes are very rare and perform exceptionally well. Background is very transparent and overall sound is very clean but musical. They are very hugely sought after and because of its rarity, their conditions are often looked quite beaten up and text faded. Tube #1 feels slightly loosened up but all these are just cosmetic imperfections. No leakage as the silver coatings are still shimmering shiny.

These are one of the top 3 as close as the best American 6SL7GTs one could get. Military specs of the tubes can be confirmed with stronger than new readings. They would not worth this price if not for the cosmetic imperfections stated earlier. This pair is truly a huge bargain!

These 6SL7s are tested by plate current instead of the usual transconductance because the input values are beyond my tester could handle. Values are obtained from characteristic plot of their graphs of the tubes data.

Typical plate current reading for the test is 0.5mA for new tubes. Typical gain values should be around 70mu for new tubes.

Tube #1
Side A: 0.80mA / 74.9mu
Side B: 0.92mA / 75.0mu

Tube #2
Side A: 0.80mA / 78.7mu
Side B: 0.74mA / 79.0mu

Comes in white box.

All vintage tubes come with 1 month warranty.

See how we test tubes here.

What you see is what you get. When we sell tubes we always will take various angles of it so to make sure what you select is exactly what you saw. No substitutions, no dishonest replacements.

Note: unless specifically mentioned, we do not label our out-of-production tubes as NOS (New Old Stocks), a term so commonly branded in many tubes seller. There can almost never be any guarantee these out-of-production tubes are NOS; they were mostly made in the middle of 20th century!! Who tells the tale that they are still new?? No doubt there will still be, but the changes of hands of all these stocks made this verification too difficult. To us, tubes can test excellent or test like new, but we call them all vintage tubes.

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