Slowly obtaining a spare set of valves for my Croft preamp and TD Copper amp

[jostber]

My recently acquired power amplifier has two RCA Radiotron 5687 tubes. Are these good stuff?

[basnas]

Hi
Just tried a Mullard e80cc insted of the 12bh7a in my Croft Series 7.
Wow this e80cc sound good.More later.

jan

[Withani]

Hi,
I see that worrasf sourced a set of GEC A2900 valves and I have recently discovered that at least one in my Croft OTL is in the process of dying. I have tried others but I find them rather poor in comparison.

So, I wonder, could anyone point me in the direction of a supplier?

Many thanks

Withani

[Mr Kipling]

Did you know there's three different types? Looking on the 'net I found there's a double mica, a later triple mica and an early triple mica. The later triple is marked ar CV6091 and the early triple has a batch no of 100. This is reckoned to be the best of the three. Here's quite an old link:

http://hktubeaudio.homestead.com/files/12AT7.html

[Withani]

Thanks Mr Kipling.
My 2900' s seem to be the type number 3) - they are Lot 27 with a UF Z code on the glass.

Anyone know where I might source any?

Cheers

Withani