Justin & Jerry's Hifi Blog

**Mike** · 05-07-2009, 09:52

Ah, that's the 'death spot'!... You should send your amps to me for safe disposal as soon as possible.

Or... you could just keep on enjoying them and not worry too much about what looks like a painted marking on the glass which has discoloured due to the heat. Seriously, that's all it looks like form here. If the amps have the facility to check/adjust the bias it may be worth checking that it's in spec and doing a few regular re-checks just to make sure things aren't going awry.

**Spectral Morn** · 05-07-2009, 09:56

Hi Jerry

I think this may be the getter on this tube. Some getter are at the top of the valve and sometimes on the side or both. Valves may have multiple getters.

This link shows pictures and descriptions of valve/tube condition and the various things that you can and do see when using them....hope this helps.

Link http://thetubestore.com/blueglow.html

Regards D S D L

**jandl100** · 05-07-2009, 10:22

Originally Posted by Dalek Supreme D L

Hi Jerry

I think this may be the getter on this tube. Some getter are at the top of the valve and sometimes on the side or both. Valves may have multiple getters.

This link shows pictures and descriptions of valve/tube condition and the various things that you can and do see when using them....hope this helps.

Link http://thetubestore.com/blueglow.html

Regards D S D L

Aha - yes, that seems like it.

As the link says -

Getters

The getter or getter flash is the silver/gray coating seen on the glass of a tube ....... Regardless, the getter flash is what indicates there is a good vacuum in the tube and that no air has leaked inside.

That sounds OK then!

Thanks guys, phew!!

Originally Posted by Mike Homar

Ah, that's the 'death spot'!... You should send your amps to me for safe disposal as soon as possible.

And I shall decline your kind offer for the moment, Mike.

**Mike** · 05-07-2009, 11:01

Originally Posted by jandl100

And I shall decline your kind offer for the moment, Mike.

Bah!... it never works!

**jandl100** · 12-08-2009, 08:29

These should arrive today ...

Exciting, isn't it!

I doubt my Cary SET valve amps will be able to drive them - but I expect my 400wpc Bel Canto eVo4 will do just fine.

**Marco** · 12-08-2009, 09:21

Nice one, Jerry... But what are they exactly? Are they famous (somewhere?) and we're supposed to know, like...

{Edit: I've just viewed your post in 'Admin mode' and noticed that they are designs from Infinity}.

A bit more info for the benefit of the uninitiated would be good, matey!

Marco.

**jandl100** · 12-08-2009, 10:03

Originally Posted by Marco

A bit more info for the benefit of the uninitiated would be good, matey!

Marco.

What? I thought part of the fun was identifying unusual kit.

Anyway, you hifi forum admin types are supposed to know everything about hifi!

Anyone else know?

If you want to cheat .... Info link .... http://www.bobbyshred.com/infinity/RS25.html

**Marco** · 12-08-2009, 11:25

They should be nice, Jerry. You may be surprised just how good the Carys are at driving them... As long as they have a fairly flat impedance curve, efficiency of at least 86db, or so, and don't have stupidly complicated crossovers, then they should be fine.

We look forward to a full write-up (with pictures of them in situ) in Strokes of Genius

Marco.

**Mike** · 12-08-2009, 16:28

It won't be too long before he ends up with a pair of THESE!

**Marco** · 12-08-2009, 17:54

I bet they'd be bloody awesome!!

Marco.

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