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24th August 2005, 05:13 PM
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#1 |
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diyAudio Member
Join Date: Sep 2004
Location: A bloke from Stoke
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buffer stage ECC88 or ECC83?
I'm going to build a buffer stage to go between the output of a TVC into my PPKT88. Reason is to account for eq I need to apply for my room/speakers.
I've got a few ECC88's and ECC83's sitting around looking bored, can anyone advise on a suitable circuit utilising either of these? Kev |
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24th August 2005, 08:15 PM
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#2 |
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diyAudio Member
Join Date: Feb 2004
Location: South Wales
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Buffer stage
a straightforward White-Cathode follower, using the ECC88/6DJ8 would be my choice, Lots of schemes about for the '88 The '83 tends to be a little more microphonic especially some brands!
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Das Beste Oder Nichts |
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25th August 2005, 11:10 PM
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#3 |
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diyAudio Moderator Emeritus
Join Date: Jan 2003
Location: Near London. UK
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Do a search for SY's recent "Heretical line stage" thread...
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The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference... |
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26th August 2005, 09:59 AM
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#4 |
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diyAudio Member
Join Date: Sep 2004
Location: A bloke from Stoke
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Sorry Guys
I've just re-read my post and realised it isn't at all clear.  By needing to compensate for equalistaion I will need some gain, around 9dB to be sure, and as far as I know cathode followers have a gain of a little less than 1 so these are no good. Any suggestions for a stage with a small amount of gain preferably but not exclusively using ECC83's or 88's Kev |
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27th August 2005, 12:09 AM
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#5 | |
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diyAudio Member
Join Date: Apr 2004
Location: Plainsboro, NJ
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Quote:
BTW, the trafo idea works with the 6922, but you still get 20+ dB. of gain. Perhaps, that's too much.
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Eli D. |
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