- Recommended in

For the ARC the only safe option is the Russian 6H23П

the Audio Research SP10 is notorious, as is the Audible Illusions Modulus 3, in running the tubes at high current. 

The only sure survivors seems to be the Russian 6H23N having a ratings for current handling capacity.

ALL MATCHED PAIRS ARE WITHIN THE FACTORY mA & mA/V PERCENTILE - WHICH IS WITH IN FACTORY DESIGN-CENTER DATA-SHEET SPECIFICATIONS AS FOLLOWS:

6N23P, 6N23P-EV (6H23n, 6H23n-EB)

General

Double triodes, used as an wide band HF power amplifier and oscillator.

Envelope: glass.

Mass 16 g.

Type	6N23P *	6N23P-EV
Filament (heater) current, mA	310±25	310±25
Anode current, mA	15±5	15±5
Reverse grid current, mkA	£0,2	£0,15
Dissipate cathode-heater current, mkA	£15	£15
Mutual conductance, mA/V	10-12.7	12.5±2.5

* 6N23P mA = 15 plus or minus 5mA ( 10mA to 15mA = 100% Factory Spec.)

* 6N23P mA/V = 10 - 12.7 ( 10mA/V (GM) to 12.7mA = 100% Factory Spec.)

These tubes are new old stock, and haven't been made since the 1980's, the dates are from 1981

NOS from 1981 to 1987 - Made up to Thirty-Eight (40+ Years) ago!

OTK-1 MILITARY MARKINGS

NOS: CHOOSE WISELY!

IN A WAY THAT SHOWS EXPERIENCE, KNOWLEDGE, AND GOOD JUDGEMENT.

Question? Which Version Should I Buy?

Choose Wisely with VOSKHOD "Space-craft" 6N23P (6H23N in Cyrillic), and not the other versions.

CERTIFIED LOW-NOISE MUSEUM SPECIMENS

TubeMuseum tested tubes takes the guesswork out of the process of selection delivering you the best Audio tubes that there possibly can be.   

ACTUAL  POSITIVE-FEEDBACK  ABOUT OUR RUSSIAN TUBES:

Feedback	From	When
	As described, promptly shipped. A+++++	Buyer	During past month
	6N6P 6H6N Amplitrex Matched PAIR w/ GOLD GRID-POSTS two tubes for BAT Tenor 75wi (#291771739118)

Feedback	From	When
	Received very quickly extremely well packaged. Tubes exactly as shown.	Buyer	During past month
	6N6P 6H6N Amplitrex Matched PAIR w/ GOLD GRID-POSTS two tubes for BAT Tenor 75wi (#291771739118)

Terms of Auction

NEED JUST ONE TUBE? THEY ARE AVAILABLE JUST ASK!

YOU WILL RECEIVE NOS 1981 MATCHED PAIR (2 TUBES)

NOS from 100 BULK RUSSIAN MILITARY MASTER CASE. NO INDIVIDUAL PAPER BOXES.

Per eBay's terms of service which every eBay account holder must agree to as part of being an eBay member, a bid is a legally binding contract. Please read the Terms & Conditions carefully before bidding. By bidding on this auction, you understand and agree to eBay's terms of service as well as all terms and conditions mentioned here.

Buyer pays all shipping, Item must be in original condition including cosmetic lettering on tubes so handle with white-glove care, un-used with all original boxes, packing material, environmentally safe cornstarch pellets, and shipping box. Absolutely NO RETURNS on special orders or best-offer deals. All sales are final with NO RETURNS on self installed mic tubes.

All exchanges must be pre-paid and returned in original packing, complete with no sign of wear or abuse, exactly the same condition as it was when you received it. In the event that the product is not in the same condition, and does not test the same as you received it, you will be subject to a refusal and return, a determined restocking fee, repair charge, or disqualification. RETURN AUTHORIZATION (RA) number and instructions is required before sending any items. Shipping and handling charges are non-refundable.

We do not guarantee that your tester, or your tester's measurements will be the same as the Amplitrex AT-1000. Older testers, different testers, or the same tester may report different test measurements, and may not measure the same tube meaningfully (due to current dependency), accurately (due to calibration difficulties) or consistently (due to internal circuit drift) There is no warranty or returns based on what any other tube tester reports.

THE COST OF ALL USA SHIPPING INCLUDES INSURANCE, TRACKING NUMBER AND DELIVERY CONFIRMATION

ADD JUST $3.99 FOR USPS PRIORITY MAIL 2-DAY IN USA!

 Visit this seller's eBay Store! 

TUBEMUSEUM NEW YORK

BID 1 FOR a BALANCED MATCHED PAIR of these RARE Phenomenal TUBES!

phe·nom·e·nal/fəˈnämənəl

1. Very remarkable; extraordinary.

2. Perceptible by the senses or through immediate experience.

Terms of Auction

International Buyers – Please Note: 

We do not low declare customs amount and we insure for full value.

International Buyers - Please note: Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility. Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying.

International Shipping - items may be subject to customs processing depending on the item's declared value.

Sellers set the item's declared value and must comply with customs declaration laws.

- import duties and taxes which buyers must pay.

Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyer's responsibility.

Please check with your country's customs office to determine what these additional costs will be prior to bidding or buying.

Per eBay's terms of service which every eBay account holder must agree to as part of being an eBay member, a bid is a legally binding contract. Please read the Terms & Conditions carefully before bidding. By bidding on this auction, you understand and agree to eBay's terms of service as well as all terms and conditions mentioned here.

Buyer pays all shipping, Original shipping is not refundable. Item must be in original condition including cosmetic lettering on tubes so handle with white-glove care, un-used with all original boxes, packing material, environmentally safe cornstarch pellets, and shipping box.  All sales are final with NO RETURNS on self installed mic tubes.

All exchanges must be pre-paid and returned in original packing, complete with no sign of wear or abuse, exactly the same condition as it was when you received it. In the event that the product is not in the same condition, and does not test the same as you received it, you will be subject to a refusal and return, a determined restocking fee, repair charge, or disqualification. RETURN AUTHORIZATION (RA) number and instructions is required before sending any items. Shipping and handling charges are non-refundable.

We do not guarantee that your tester, or your tester's measurements will be the same as the Amplitrex AT-1000. Older testers, different testers, or the same tester may report different test measurements, and may not measure the same tube meaningfully (due to current dependency), accurately (due to calibration difficulties) or consistently (due to internal circuit drift) There is no warranty or returns based on what any other tube tester reports.

NOTICE: 

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By entering this site you are agreeing to be bound by the terms of this agreement. All photographs and text appearing in the Tube Museum New York (TubeMuseumUSA) site(s) are the exclusive property of The Tube Museum New York © (except where stated otherwise) and are protected under international copyright laws and treaties. They are made available for your personal viewing enjoyment only. No images or unique text are within the Public Domain. The photographs and text may not be copied, reproduced, redistributed, manipulated, projected, used, or altered in any way without the prior express written permission of The Tube Museum New York ©.

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