I got a few on my bench, but haven't got too far yet... to busy with other projects.
Are you using the OEP tranny?? where did you get if from?? I guess they don't have a distributor here in the US.
I remember seeing these trannies for 9 euros on Canford. I may be worth going through them. Would you be willing to buy some for me and ship it? since I can't get them here??. Of course I would send you the money first.
[quote author="BR"]I remember seeing these trannies for 9 euros on Canford. I may be worth going through them. Would you be willing to buy some for me and ship it? since I can't get them here??.
The OEPs are 9.50 pounds at Canford, not Euros, and that is without the mu-metal screen can. The can is another 3.40 pounds (~US$23). Newark carries them in the US and asks $27 for them.
Fabio has made a board, called FETBoy for a preamp similar to the [email protected]@ne FET pre.
I have done most of the stuffing on mine although I am not using the original circuit. I am using the 2N4393 FET instead of the 2N5457, no AC bypass capacitor on the FETs and the entire circuit runs on a single 48V supply.
the oep`s at rs,cost 14,59 euros each,and the can costs 5,61.
the price at canford,it`s about the same,plus the shiping from uk to portugal.
i think it`s better to buy from rs,and faster(2 days).
if you think that it`s okay,tell me and i`ll send them to you.
today i received stuff from digikey,and i had to pay 75 euros of ups.
i`m still out of breath,and my heart just skipped a beat.
Thanks Fabio for the clarification. As I see the pics I remember them from another thread!
Has someone tried to change the darlington out to a "modified darlington" (say a 2k resistor from Q2/Q6 emitter to ground)? This arrangement tends to behave better (i.e. reagrding freq. response/speed) than the former.