[sdiy] Noob Question: Passive Filter Design

[Oren Leavitt]

Cary Roberts wrote:
>>Have seen a fair number of filters, I asked my
>>professor what the advantages/disadvantages of using caps vs.
>>inductors are, especially as the discussion relates to audio circuits,
>>but he was unable to answer that. Can anybody help me out? It would be
>>especially helpful if anybody has a suggestion for further reading.
> 
> 
> I suggest looking at the schematics for the following:
> 
> - Pultec EQP-1A
> 
> - Neve 1066/1073/1084
> 
> - Sphere 900/920
> 
> - API 550A/550B
> 
> 
> My favorite EQs are all inductor based.  Most EQs on the market today do not
> use inductors but use gyrators to simulate inductors.
> 
> 
> -Cary
> 

I love my old JVC SEA-10 stereo graphic EQ. It uses inductors. The only 
active components in the signal path are two transistors.

I have a circa 1967 Ace Tone "Rhythm Ace" FR-1 beat box - it uses 
inductors for the various percussion voices.

- Oren (do inductors get one "inducted" into the Hall of Fame?)