Up for purchase is one (1) Cardon C-586 type 50 (UX-250 CX-350) equivalent tube. My last Cardon C586 on hand.

Test results on Amplitrex AT-1000 as follows:

               Transconductance (Gm): 1.90 mA/V

Where new/nominal results would read:

Transconductance (Gm): 2.1mA/V

No other tests performed. Sold as-is with no warranty of any form, especially how it will sound in your system. Item(s) will be packed with foam peanuts / bubble wrap and will be shipped via registered mail with tracking number.

Test results may vary on your test equipment.

Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility. I will not under-declare the item value so please do not ask. No claims no returns please except for filament breakage upon arrival or test results vary materially from description above.

Due to previous bad experience, no shipping to Singapore. No shipping to China due to Customs limit.

Buyer to make payment immediately using Buy-It-Now or 48 hours from auction close.

Please ask any questions before bidding. Thanks.