15-12-2021, 01:00 PM
Thanks Trevor
My thoughts are that they were manufactured around the 1970s. I have some Ei ECC 83 valves that I bought many years ago and they are absolutely superb.
Best Regards
My thoughts are that they were manufactured around the 1970s. I have some Ei ECC 83 valves that I bought many years ago and they are absolutely superb.
Best Regards
if all else fails...read the instructions!







