[quote author="Viitalahde"]I have had the crazy idea of doing an air-core inductor passive EQ someday. :twisted:
The last time I calculated, some of the coild ended up weighing several kilograms - these things would need THICK wire to end up with decent resistance.
I still like the idea. A passive EQ that would probably be at least 6u high, have only few bands and the weight around 20-30 kg. :razz:[/quote]
You're really quite mad you know. Oh wait you're from Finland.. never mind. :razz:
That link up there sells huge inductors made out of huge wire, for huge prices. They're over six inches in diameter. Jaakko that would be a huuuuge EQ can't wait to see it! :roll: The thing is it would impress clients like crazy I bet!
I've started on the passive EQ designed by NYDave of the well known New York Daves. Mr. Wilco decided he liked me after all and sent me some BSL inductors... I only asked for seven of them yeesh. Mr. Onsemi has sent me $200 worth of expensive output transisters (I can put in a good word for you if you need some). I wish Onsemi made switches lol.
I'm building the NYD passive on a turret board with solder terminal switches. I have greyhills for the band selection switches because I got a great deal on some but I can't find anything other than Alphas or Lorlins for the 12 pole switches and the Alphas wear out and I don't like the Lorlins. CTS has some nice ones I really like BUT their shorting switches for $8 are 11 pole not 12.... only the BBM have 12 poles. wtf? :sad:
There are lots of good quality surplus switches on ebay from Russia, I have a few but I hardly ever see MBB ones. I'm trying to concoct some scheme to use BBM switches where MMB are needed. The problem is the period when there is no continuity during the "break". I've considered modifying the wiper on the ones where it is accessable. Yech. The only other thing I have thought of is a manual switch to shunt the rotary switch to ground with a suitable resistor during the breaking before making phase. That's relatively nutso as well, but it would work.
Kiira