33cde8ad   
   From: ruffrecords@yahoo.com   
      
   Patrick Turner wrote:   
   > On Sep 30, 11:47 am, "Ian Iveson"   
   > wrote:   
   >> "Ian Bell" wrote:   
   >>   
   >> It likely depends on how close saturation is to 20Hz, *at   
   >> the signal level the OPT is likely to encounter*. If you're   
   >> willing to use feedback, and the signal is small, you may be   
   >> OK. An appropriate filter at the input should make   
   >> saturation impossible.   
   >>   
   >> Patrick'll be along in a tick.   
   >   
   > That Patrick fella might say "try for as much Lp as possible, and make   
   > sure Fsat at 1kHz clipping level with load of 4x Ra or higher is below   
   > 20Hz. "   
   >   
   > Sometimes this means you must buy a 10W OPT rated for 10k load and   
   > -1dB at 20Hz - 20kHz.   
   >   
   > The use of a genteel little tube like EL84 in triode, or a 6A3 should   
   > give real music with no bad sonics.   
   >   
   > Patrick Turner.   
   >   
   >   
      
   Tha I understand but what intrigued me was your earlier post about how you got   
   perfectly   
   satisfactory results from a small radio OPT. What sort of Lp would that have   
   had?   
      
   Cheers   
      
   Ian   
   >   
   >>   
   >> Twice the plate load? It *is* the anode load isn't it? 2 to   
   >> 3 times ra, depending on whether you want power or fidelity   
   >> respectively, broadly speaking.   
   >>   
   >> There is a tradition of not caring about head amps...as if   
   >> they are add-on extras to the main system. These days, they   
   >> quite often *are* the main system.   
   >>   
   >> Ian   
   >   
      
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