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Hey there, no but it’s been soldered with a stand off between it and the pcb. When testing I made sure there was a clear gap.

Hey all, I’ve built a few of these but I I have bumped into some issues with this one. There is normally plenty of dirt to be had. Basically the volume and gain is quite low. I have had a look at the other threads and tried replacing the 2N7000, same issue. I’ve worked through with an audio...

Cheers dude, or buy a shed load, match and sell ! I could offset the dca75 by selling my 55

Hey all, I am looking for a matched quad set of JFETs. Does anyone have an idea of a uk supplier - I am struggling. I know I can get them from AION for around $9 but the shipping is like $18. I was considering buying 100 from banzai and a dca75 but that’s a lot of money.

Tried a few !!! Nothing

@jwin615 Hey dude, gave it a good probing. It actually starts to get a little glitchy at Q1 collector - I’ve tried socketing r5 and tried a bunch of resistors to no avail ! Things just get progressively worse really. I’ve also whipped out C1 and C5 - nothing. Might have to admit defeat !!!

@jwin615 any further thoughts brother ?

Thanks for this dude - C11 is orientated correctly but I have just swapped it out regardless - no better. Voltages are: Q1 E 2.08v, B 2.76, C 4.2 Q2 E 3v, B 3.7, C 3 When turn the trim it goes between 3.7 and 2.2

Hey there, checked orientation a gazzilion times. Which would be the primary smoothing cap 🤔 I am also guessing that the bias resistors are R3 R4 R7 R8 ?

I’ve literally checked every resistor 3 times and they are all as per the BOM. The voltages across the transistors ‘seem’ ok to my amateur eyes. It’s really perplexing.

Hey man, tried a few !!! 5088 in Q1 and 2N2222a in Q2. Also tried BC549c in Q2 (correct orientation) these are probably the 7th I have built of these and I have always used the 5088 and 2n2222a combo. It’s confusing me that if I reverse Q2 ie pi the emitter where collector should go, it works -...

They are well stood off. It’s literally killing me.

Hey all, I hope some one can help. I’ve just built one of these having done a fair few before, without issue. On testing it sounds like a dying ZX Spectrum, or more accurately like it’s maybe not getting enough power. Hit a string and just glitches and disappears. The trim makes zero...

@Robert It would seem that ‘maybe’ this has been reverse engineered ??? Would love to see this fella.

Cheers dude, so as close to identical Vp as possible i.e. within 0.1v of each other.

Cheers dude, I am even more confused 🤦🏼‍♂️

Hey there Amigo’s, So I have splashed out on a SOT23 Peak tester, why not hey. I have 100 each of mmbf5457 and mmbfj201s. What bloody numbers am I looking for and what is an acceptable range for said numbers ? Thank you in advance all

Hey man, I use decals printed onto water slide. Never has it occurred to me to stick then drill. Today was a great learning day - the art on this awesome

Any further thoughts on this one ?

It’s a NSL-32 and the diodes are 1n34a. Is amazing clean, just when a bit of dirt is introduced !!!