Gold-plated fingers on your 500 series FiveFish preamps, to go with your bling! I used gold-plating in connectors like these PCB pad fingers not just for show but because gold-coated contacts are highly reliable, and corrosion resistant. These contacts should last for many decades and look just as good from …
Found this photo in facebook, of a vintage SC-1mk500… 2009/2010 era! Thanks to Fred! // Found a way to embed facebook posts in a blog, so this is the first posting!
Frequency (f) is the number of repeating events per unit time. So if something is vibrating at 20 times per second, then it’s said to have a frequency of 20 Hertz. If something is vibrating at 200 times every 5 seconds, then it’s said to have a frequency of 40 …
So let’s say you want to own some 500-series lunchbox modules, could be a mic preamp, compressor, or equalizer unit. The problem is you don’t own a lunchbox rack. Even a blank 6-space rack can cost a pretty penny, and you still end up with no modules after purchasing the …
Our front panels are anodized aluminum, with engraved labels. The stock SK-1DI mic preamp kit comes According to Wikipedia, Anodizing is an electrolytic passivation process used to increase the thickness of the natural oxide layer on the surface of metal parts. The process is called anodizing because the part to …
Let’s talk about decibels (commonly abbreviated as dB)! 
What is dB? The simplest way to explain it is “decibel (dB) is just the RATIO of 2 numbers.” That’s all there is to it, it’s that simple. To be more exact, dB …
On an earlier post, I mentioned I was working on a new preamp kit. (See here) On that post, I temporarily used a vintage St. Ives Input Transformer for my prototype since I ran out of my Carnhill Input transformers. Now, I’m going to replace that St. Ives …
Fresh PCBs from factory…. back in stock! OpAmp Test Jig PCB. http://fivefishaudio.com/diy/opamptestjig/ 
The board can be configured for either Unity Buffer or Amplifier configuration. For the Amplifier configuration, it can be selected for either Non-Inverting or Inverting configuration. Gain is adjustable via jumpers from …
A few months ago, I got an HP 8904A Multifunction Synthesizer, from DC to 600kHz (from eBay). Got it for a good price, fully loaded with options. The unit has (2) balanced/floating outputs, (4) internal channels, and can do “noise”, square, ramp, triangle up to 50kHz, and sine waves up …
It’s bound to happen when you have this much test probes, test leads and cables hanging around… 
