Vintage Dumont 6HM5 6HA5 EC900.  Set of 10.

These are new old stock valves made in the USA by Dumont in New Jersey who made precision test equipment. These valves are highly regarded destined for more-demanding commercial not domestic use originally.

We have excess stock of this model; they have all been tested on a 1960 AVO Valve Tester and we've never had one fail.

In light of this I will include a 90-day no-quibble replacement warranty on these valves. 

Asking just £40 for the set of 10 with free UK recorded postage. Rest of the world, £12 tracked postage. 

Please see the extract from the Radio Museum for technical details and please ask any questions.

I have different quantity sets of these valves in other auctions.

Thanks for looking,

Andy.