You are looking at an ECF82 (6U8 USA equivalent) triode pentode valve / vacuum tube by Mazda, new in original box, fully tested and working. The ECF82 was a general purpose triode pentode amplifier, but was made famous by a very innovative design for a superb audio phase splitter published in 1962 (Google it!) If you have an amplifier based on this design using ECF82, this is your chance to acquire a brand new example of your key valve. Hence the realistic price - If you know what this valve is and what you are getting, you will appreciate I am NOT selling it for 99p!!

This particular example is new in original Mazda box and it absolutely pristine condition. It has recently been fully tested on my Mullard High Speed Valve Tester and shows no faults and nominal new emission on both sections.

A realisitc starting price for a rare chance to acquire a sought after and useful valve / tube in new, working condition. Ideal for audiophiles, experimenters and collectors alike.

I do not sell my valves / tubes for 99p as selecting and testing them takes time, equipment and experience. Why waste your money on 99p untested valves / tubes when you can buy "guaranteed working or your money back" working ones from Helmore & Hunt?!

ECF82 / 6U8

Heater = 6.3V @ 0.3A

Pentode:
Anode / Plate:  100V / 6.0mA / 0.4Mohm
Screen Grid: 100V / 1.7mA
Signal Grid: -1.0V
gm: 5.5ma/V

Triode:
Anode / Plate:  200V / 3.5mA
Signal Grid: -2.0V
gm: 3.5ma/V

Tip for running heater: it will run from any standard 12 volt transformer with a 10 ohm 1 watt resistor in series.

I offer a full, money back guarantee if you are not completely satisfied with this purchase (see terms). We have been trading since 1927 so bid with confidence. Most of our valves / tubes have been in our own stock room for many, many years. See our EXCELLENT FEEDBACK on quality valves / tubes previously supplied!

We have thousands of valves / tubes in stock - standard and rare; US, UK and European. If you have any particular requirements, please send a message and if we have what you want, we will list it here.

We ship worldwide and are very happy to combine items for multiple postage.

TERMS

GUARANTEE: In case of dissatisfaction, buyer must return item at own expense. We will only refund if you return the EXACT SAME VALVE / TUBE to us that you have purchased, with the heater still intact and passing continuity test. Believe it or not, some evil people have tried to send us back their dud tubes to try and get a full refund for a perfectly good tube we have just sold them! So, refund is a genuine offer, but at our discretion that we have been sent back what we actually sold you in the first place and that you haven't destroyed it through misuse! All returns under guarantee are limited to within 21 days of shipping.

PAYMENT: We accept Paypal, cheques in GBP, UK postal orders / bank drafts or wire transfers. Please CONTACT US FIRST before sending payment by a method other than PayPal - there will be a delay in shipping while we clear your payment if you pay using these other methods. We are happy for you to collect from Bristol, but will require payment in GBP cash on collection.