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Old 21st April 2004, 08:26 AM   #31
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arnoldc,

I'm almost finish with soldering and other stuffs.

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Old 21st April 2004, 08:31 AM   #32
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I have installed the tubes... checking connections...


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Old 21st April 2004, 08:38 AM   #33
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Beautiful workmanship.
Congratulations!
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Old 21st April 2004, 12:29 PM   #34
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Quote:
Originally posted by Frank Berry
Beautiful workmanship.
Congratulations!

Thanks Frank! It's alive!

Used a GC amp for testing.

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Ohlala!
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Old 22nd April 2004, 12:04 AM   #35
s2kov is online now s2kov  Canada
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JojoD,

Is it already the circuit you're looking? Nice one again! Is it possible if you can share it with me?
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Old 14th May 2004, 12:52 AM   #36
s2kov is online now s2kov  Canada
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I just finish to built my own preamp and i want to tweak it to further improve the sound of my ST70.

Can anyone recommend what value of coupling cap that will be used to match the ST70? Is the input impedance of the amp is the resistor connected in parallel with the input of the amp?

Thanks....
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Old 14th May 2004, 01:03 AM   #37
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Hi,

Quote:
Is the input impedance of the amp is the resistor connected in parallel with the input of the amp?
Yes, that's one way of putting it...

I think the stock ST70 had 100K input impedance so a 0.470F coupling cap should do, depending how low you want it to go.

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Old 14th May 2004, 02:38 AM   #38
s2kov is online now s2kov  Canada
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Thanks Frank....


Quote:
Originally posted by fdegrove
Hi,



Yes, that's one way of putting it...

I think the stock ST70 had 100K input impedance so a 0.470F coupling cap should do, depending how low you want it to go.

Cheers,
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