| where to get my inductor - Click HERE for Original Thread |
| jdreier |
I am trying my first tube project, a phono pre.
http://www.geocities.com/rjm003.geo...o/diy_pho3.html
With the tube rectified LCLC power supply at the very bottom of the page
But I can not figure out where to buy these inductors
20H @ 30mA
5H @ 30mA
Where should I get them? |
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| lndm |
| Tried Lundahl or Sowter? |
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| jackinnj |
inductors -- Hammond carries low, medium and high current chokes -- http://www.hammondmfg.com/5cchk.htm -- for 2 sections of a preamp the circuit probably demands 20ma or thereabouts -- you don't have to be ultra-precise in the inductance -- but do need enough current handling capability.
FWIW -- C3 and R7 are also part of the passive RIAA filter. You might get a tad better bass performance out of the design if C3 is increased to 220nF, and R8 to 680K -- the original design is very good, however.
build it as specified, then change the values of C3 and R7 and see which sounds better. the difference is only a few tenths of a decibel.
and after you build it, post a picture. |
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