Recent content by Amplified Parts

Very nice! I have a few 2n270s on-hand and they measure right around there for hfe.

Hey Feral Feline, sorry but that's not something we sell at the moment, just the best pic I had on-hand for showing off the PR02s in use. That circuit is based on (but not exactly) the WEM Project V and is just something I put together for my own use. We might sell a similar board in the future...

If the resistor footprints are the common 1/2W size, I like Vishay PR02 resistors for that. They're metal film and remind me of some old Piher types, although they're not quite as dark.

Do you like the master volume on the Buzzaround? I've built a couple stock Buzzarounds and felt like the Balance control (as odd as its implementation is) works as an effective volume control. I didn't find much of a timbre difference in its rotation, but maybe it'd be more noticeable with a...

These all look great - really digging the artwork on them too. The Buzzaround's art is a great look for the bare enclosure.

Don't worry about the exact Q1 voltage. Q1 base voltage will be equal to Q1 Vbe since the emitter is grounded (0V). The Vbe will change some depending on how much current is flowing into (or out of, depending on NPN/PNP) the base, with more current making for a larger voltage drop, but it's not...

To me, the colorsound one (or in this case zero) knob fuzz and similar squeeze the most out of a very simple circuit. Put it first in the chain and your guitar's volume control can work as an effective "fuzz amount" control.

That tracks with our testing although so far I don't believe we've had cause to test Ices directly, but we do have the means to if needed. When leakage parameters are given in the datasheets we are comparing against we typically see Icbo or Iceo values which is always part of our tests. The %...

It varies a bit depending on what we’re inspecting and the source, but we start with a visual inspection. We're fortunate enough to have access to a lot of desirable semiconductor types from various manufacturers from the work we do here and from the personal collections of the builders we have...

To the best of our knowledge, our current stock is the Unizon 1N34A as seen on this page. Keep in mind that the brands we carry (and our sister company AES/tubesandmore carries) for NOS products can change unless stated otherwise as we work to maintain stock of an item that is only getting more...

These were designed in-house to match vintage spec and then custom-made for our customers. The price reflects that process - we'd make it cheaper if we could! We're always looking to reduce costs so if we find a way to do it, we will. We are hoping to fill a gap in the market for folks looking...

Here's someone who did just that, although I can't verify it ofc.

Nice. Typically, I wouldn't sweat my bias voltages too much as long as it sounded nice, particularly if they're just a bit off, but I still feel like there's something a little odd at play here. 220k for Q1C is pretty massive, and your Q2E voltage before that tweak tells me that a lot...

Q2E should be Q1C/Q2B minus the diode drop of the base-emitter junction of Q2. Not proportional, but Q2E should always be just a bit below those voltages, ~0.1-0.3V closer to zero in the case of germanium. Q1E should be grounded, so it should always be 0V in a Fuzz Face unless you've modified...

Hard to say because it's a third party seller there. The stock comes from Bridgold Direct, so it depends on what they are carrying. The printing looks very suspect to me. I think this is a genuine Intersil ICL7660S...