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I was looking at a build using 2N7000 MOSFETS. I built the Lemonade Drive and I found the FETs available were dodgy. I end up getting NOS components which worked well. Is there any issues with the 2N7000’s that are now available? Thanks for your assistance. Regards Mark

Thanks for your replies, they were very helpful. I didn’t want to go through the nonsense I did with the FET’s. Regards Mark

I was building a Lemonade pedal and found that the new 2N5457 FET’s were no good and I would need NOS FETs for the build. The NOS 2N5457 worked Luke’s charm. I was wondering if the BS170 transistors have and issues the 2N5457 FETs? Thanks for your assistance. Regards Mark

One thing that I have noticed is if the battery gets down to 7vdc the pedal sounds like the bias is off. I think this pedal is better off being run from a power supply. Regards Mark

Thanks Hamish R for your reply, much appreciated. As seen in my attachment, the difference between the Fairchild 2N5457's and the Motorola 2N5457's is night and day. A huge thank you to Phil for supplying with the Motorola 2N5457's, having the right part makes a huge difference. There is one...

Still reading up on FET’s, the calculator implies the source resistor is too large to have the Vd at 4.5vdc. With the data I had it states the Rs would need to be 390 ohms. JFET calculator

I decided to take the measurements a bit further today. I used the simple FET tester to check the Vgs(off) and Idss, then I put the FET into the circuit on my breadboard. Basically, I found the higher the Vgs(off) and Idss the closer the 2N5457 was to operating in the desired area. 2N5457...

I have two quite old J201’s which I measured. (1) 0.881vdc, 0.553mA (2) 0.856vdc, 0.550mA From what I’ve read these are good values, not sure why yet, but they are bound for the Boogie Monster. Regards Mark

I decided to have a go at measuring Vgs (off) and Idss. I used a power supply that supplied 9.3VDC, the 10M resistor on the source that measured 10.1M, and a 1K resistor on the Gate which measured 996 ohm. I have five 2N5457 JFETs this are Vgs and Idss figures. (1) 0.543V, 1.57mA (2)...

This diagram does confuse me a bit. It is very much like a thermonic valve where lower Vgs means more current flow. If I have 0VDC on the Gate and 0.145VDC on the source I have a Vgs of 0.145VDC. According to the common drain source diagram. I should be seeing 3mA with that Vgs. This doesn’t...

I measured around my JFET today. The gate was 0VDC as you’d imagine, the source was 0.145vdc and the drain was 4.17vdc with the 20K drain resistor. Doing a simple bit of maths, if I am to have VCC/2 on the drain, the Id would have to be 661uA with the 1K source resistor. This means the Vgs...

I love the way you finish your pedals, I’m reading Chuck’s articles at the moment.

Great report, where did you get the real deal J201’s from? I noticed PedalPCB has the small boards to use SMD components but are out of stock. I was listening to the Lemonade Drive and wondered if having the bias off a bit was part of the pedals charm? What did you find. Regards Mark

This is what I was seeing when testing the 2N5457. It doesn’t seem terribly meaningful though. Any thoughts? Regards Mark

Music6000 could you provide a link to this part so I don’t order the wrong part? I hate ordering from Mouser as the postage is expensive. Thanks again to those offering assistance. Regards Mark

But what is your take on the FET in my Lemonade board? PPA isn’t the issue. Regards Mark

I would like to point out that I have used Pedal Parts Australia before and I have found them to be very good to purchase from. I think Music6000 was referring to pop up eBay sellers. The issue here is FET’s. It seems quite a few people have had issues with FETs judging by the links in this...

Thanks I’ll remember that. Regards Mark

I bought the 2N5457 from Pedal Parts Australia. I don’t know where these guys got them from. So are you saying they are duds? Who is a recommended seller? I haven’t read the whole thing yet as it’s a bit long winded. Regards Mark