Up for sale are two Telefunken ECC83 Grass Instrument Selected Tube Yellow Tip from 1966. These were non production tubes for use in polygraph machines. Bought these from a reputable seller on Reverb. Both were dead quiet in my Pendant SE, with zero noise or microphonics.

I recently sold my Pendant SE, so now I am selling off my collection of 12A*7 (and equivalent) input tubes. I will bundle sales together for a discount so if you are looking for something in particular please PM me.

Here is what Brent Jessee has to say about the Telefunken ECC83 Grass Instrument Selected Tube Yellow Tip.

"Watch for the rare Telefunken smoothplates with a cloth label on the glass marked "selected tube". Often these have red painted tips, and watch for blue painted tips, and laboratory grade smoothplates made for Leeds & Northrup as well. These were all screened for critical use in medical equipment, with the "selected tube" or L&N versions being the best. Grass Instruments also had a yellow tip version which was even lower noise, but they are rare and difficult to find these days. All of the red, yellow, and blue tips are incredibly quiet and very three dimensional in sound"

I have two tubes for sale. Price for each tube is $200

One tube is sold, one is still available. Price for a single tube is $200

Comes from a pet free, smoke free home. Price includes PayPal fees and shipping to CONUS.