On 18/03/2015 3:02 PM, Phil Allison wrote:
RJH wrote:
Phil Allison wrote:

RJH wrote:

My 20 year old Rose valve preamp has started making a 'whooshing' sound,
varies in intensity, with a steady rush of background hiss. Might it be
the valves? Everything lights up, and I've had the back off and all
looks in order.


** After 20 years, it is time you replaced all the valves.


Yes, I'd better bite the bullet I suppose. Prices seem to vary widely (4
x National ECC82) - this seems to be about the cheapest:

http://www.rapidonline.com/electroni...de-valve-35348


Ordered from Rapid last night, arrived lunchtime, amp now working fine.

Many thanks for your help.



** Valves are made to plug into sockets for a reason ...

**On a related matter: I used to love speaking to customers who were
considering purchasing Brand X valve amp. When prompted, they claimed
that it came with a very generous (1, 2, 3) year warranty. "How long was
the warranty on the valves." I would ask. "Oh, 90 days." Was the usual
reply. "How much to replace all those KT88s?" "Dunno, maybe a couple of
grand."

Imagine trying to sell a solid state amp, but only providing a 90 day
warranty on the transistors...

Sheesh!


--
Trevor Wilson
www.rageaudio.com.au

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