Looks like Display Electronics have been bought out . electroprops.co.uk is the website but I can't locate any chokes on there
If there is sufficient interest , I'll cheerfully arrange a UK group buy of >100mH chokes from my winder if there is an agreed spec . Will probably work out cheaper than the Hammonds suggested
cheers
316a
All I could find about display electronics was the info from companies house about the company being dissolved. The company that took their stock seem to be a hire company for film props, not a manufacturer by the looks of it.
I'd be interested if you're going to wind some though. I sold my winding engine a couple of years ago and this is the second or third time I've regretted it.
I think the circuit from Post #637 is going to be noisy if you try to use that with a laptop switcher. It'll be fine with a nice quiet supply of the linear variety though.
I have a few thoughts. But I need to meditate on it...and I see The Blade Runner 2049 4K has just arrived in the mail. 🙂
Isn’t this like an M2Fo? Although I feel an extra 3x gain on low noise low distortion preamp is preferable to a signal trafo that pickups hum and generates its own 3rd order distortion. I have used M2 with dual 24v smps and it was quieter than linear trafo.
Strange Forest of Noise with Linear PSU
Using the circuit I posted, inject 100mV of laptop switcher ripple at V+, about half of it will show up at the junction of the two JFET sources, that gets multiplied by three in the autoformer, which goes to the gate of M1.
No? 🙂
No? 🙂
Hey quick question. Looking at the F4 manual, I see the F4 can be driven with a flea-watt power amp. Is there a power limit to the amp in front of a follower such as the F4 or MoFo? I don't have a high gain preamp yet, but do have a class-D amp with volume control. It's a Dayton Audio 40w amp. If it's not safe, then I'll skip it and wait.
thanks,
Vince
thanks,
Vince
skip and wait
first and most important , that thingie certainly isn't worth to be connected to F4
if nothing else , build OP based headphone (pre)amp and connect to F4
first and most important , that thingie certainly isn't worth to be connected to F4
if nothing else , build OP based headphone (pre)amp and connect to F4
The SIT-3 circuit as originally posted has the positive rail nailed to ground. Nelson notes that the noise rejection of the Vfets is not great and this is one way of ensuring that the supply on the drain is quiet. Or at least I think that's the deal.
Most Greedy Boy, of them all... or (there is no) DEFiSIT of Papa's Koans
point is having clean rail (GND ) at VFet drain , and wiggly rail at VFets's source
everything else referenced and de-coupled to clean rail
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