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Old 21st October 2004, 02:56 PM   #1
diyAudio Member
Join Date: Feb 2004
Location: england
Default Sanken 2SC3264 in JLH?

Anyone tried these?

I'd run 2 pairs, 0.1 ohm emitter resistors, 22 volt rails and 4A bias to suit my 'difficult' Tannoy DC2000s. Difficult in that they measure 2.5 ohms at DC and probably not much more at low frequencies.
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Old 21st October 2004, 07:00 PM   #2
Graham Maynard's Avatar
Join Date: Dec 2003
Location: UK
Hi bremen nacht,

Go for it. It is possible for JLH amps to oscillate when fitted with modern output transistors, but an output Zobel can normally control that.

Cheers ....... Graham.
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Old 22nd October 2004, 09:54 AM   #3
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Join Date: Feb 2004
Location: england
I will go for it!

One of the things I like about them is that they have 2 mounting holes - that must be good for thermal conductivity.

60MHz compared to 2N3055's 2.5MHz, yeah I can see that might be a problem. I reckon the Tannoys will be pretty inductive, and I'll be making monoblocks so cable capacitance won't amount to much. Any implications there?
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Old 23rd October 2004, 07:59 AM   #4
Graham Maynard's Avatar
Join Date: Dec 2003
Location: UK
Hi bremen,

They won't acheive 60MHz in a JLH circuit with such a high impedance drive.

Implications - as with the JLH's - very clean sound up to about half of maximum power, but getting soft beyond that with multi-driver loudspeakers.

With Tannoys the sound will be something to look forward to.

Cheers .............. Graham.
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