Recent content by Idroj

Sounds fantastic with the LM308s! I don't know exactly what changes but it improves in general. Sounds more "expensive" a little more body. The other chip sounds a little brittle compared to the 308. Nice! Thanks for the advice! Now I have a fat rat 🐀 😂

I received the LM308s in the mail today 📭 📦 Will swap it on the 🐀 soon and report!

I appreciate the help. Knowing they are within specs "feels" a little better... I'll keep them all... In the process of measuring the Vp and Idss, I felt a couple of times the transistors getting super hot, one even smoked a little.. I think that happened when I had them backward... I think...

Thank you!

I was finally able to get those measurements following the instructions from above: J201s from eBay: Idds - Vp 0.81 - 0.92 0.62 - 0.81 0.33 - 0.59 0.78 - 0.90 0.69 - 0.83 0.61 - 0.79 Presoldered J201s from Pedalpcb: Idds - Vp 0.72 - 0.86 0.55 - 0.74 0.42 - 0.63 0.52 -...

Calm it down captain! "Simple" is a subjective word. I'm starting out and get confused easily, so please change your tone. Having said that, I appreciate these graphics, thank you. I'll measure them today.

I’ve tested all 6 smd presoldered ones and all the other 6 “normal” ones.. None of them reads as JFET.. all read as npn on my little cheap transistor reader.. If I only knew how to measure the Vp and Idss ?

I just tested the presoldered ones I bought from pedalpcb.. it doesn’t detect them as jfets either..

I was able to get this reading the other day with a component tester from eBay, but I believe someone said it doesn’t work on Jfets..

I’d love to learn how to measure Vp and Idss. I looked for instructions here in the forum and and google and I couldn’t find clear and simple (at least to me ?) instructions... I read something about using a 9v battery and a 1k resistor but no instructions.. ☹️

Hi, I am trying to measure Vp and Idss on some J201s and have never done this before. Could you please explain the absolute simplest way to get those readings? I can't read schematics yet... I'm very new at this... Thanks!

Now I don't know if to return eBay's J201s or not.. ? Is there a simple, easy way to know for sure if they are fakes or not?

Thanks! I'll test it with these suggestions and I will also test it with the "suspicious eBay J201s" I had on it before replacing them for these smd presoldered ones from pedalpcb. I'm just curious to see if those were indeed fakes or not, or if they'll sound any different. In theory, if both...

Ohhhh ok I see I see... ?? Can I then, by providing a little more power on all JFETS, obtain a more sustained overdrive? Also, could you help me understand why are there 6 transistors and what is the purpose of each one? It sounds great now with the Q4 all the way turned CCW it has some bite...

I just fired mine up again too. I don’t know if earlier I was turning it clockwise or what, but I turned it counterclockwise and HERE IT IS!! Nice and crisp!! Thanks!! Quick question: why, before adjusting all trim pots to 4.5v, I was getting that interrupted, intermittent gated sound? I just...