[2378] Amazon package day

Date: March 8th, 2018 | Comments : none | Categories: DIY.

EEVblog meter


[2371] AMZ USB Drive

Date: February 9th, 2018 | Comments : none | Categories: DIY.

AMZ USB drive

AMZ on USB Drive:

The AMZ USB Drive is the complete content from the cd-rom but in a more convenient format for some users.



[2365] Mosfet Booster modules

Date: February 1st, 2018 | Comments : [1] | Categories: DIY.

Mosfet Booster modules are back in stock, after a short delay in manufacturing. The pc boards are red this time instead of green as shown here. We all know that red makes your tone hotter!

More info is available here.


[2358] 2018 Postage Rates

Date: January 24th, 2018 | Comments : [1] | Categories: DIY.

US Postage rates increased for 2018. Domestic postage (to the 50 US states) was increased by 50 cents for a small package with tracking.

However, the rates on all International packages containing merchandise have almost doubled, and are now a minimum of $14 US. The post office computers do not allow the desk clerks to accept small flat envelopes as anything other than packages. Sorry, but I do not have a solution yet to this rate increase for shipments outside the USA. I can still ship Internationally, but only at the new rate.

The rate and policy change by the US Postal Service has had a big impact on many businesses that ship small, light envelopes. Almost half of my orders are for International shipments and I suspect that the new postage rate will have a significant impact on this. I will continue to look for an alternate solution so that I can ship small envelopes Internationally at a lower price.



[2352] New Year’s Resolution

Date: January 13th, 2018 | Comments : [1] | Categories: DIY.

Work bench

New Year’s Resolution… I must clean up the workbench!


[2347] BBDs are not analog

Date: January 5th, 2018 | Comments : [3] | Categories: DIY.

A bucket-brigade-device (BBD) is not analog. It is a sampling circuit that takes small slices of the incoming voltage just like an analog-to-digital-converter (ADC), and the main difference between the two methods is in how the samples (slices) are stored. The BBD samples are stored as voltage levels on tiny capacitors in the BBD chip, while the digital system converts the voltage levels to a digital measurement and stores the binary word(s) in memory.



[2337] Hackaday post

Date: December 21st, 2017 | Comments : none | Categories: DIY.

Hackaday logo My web site was mentioned as a source in an article on Hackaday called:

Taking a Guitar Pedal From Concept Into Production


[2287] Guitar Effects Explained

Date: November 27th, 2017 | Comments : [1] | Categories: DIY.

Guitar Effects cover         Distortion Book cover

Guitar FX Mods ebook         Guitar FX Mods ebook


[2331] The $58 Op Amp

Date: November 13th, 2017 | Comments : [3] | Categories: DIY.

The $58 super jfet audio op amp. Mouser Part #: 513-MUSES03

And it is only a single, not a dual…


[2329] EDN article on low power Jfets and soft clipping

Date: November 10th, 2017 | Comments : none | Categories: DIY.

A new EDN article on low power and soft clipping was just published a few days ago, and lists one of my Lab Notebook articles as a reference:

Distortion pedal circuit features low power and soft clipping

The LSK489 jfet used in the article is a nice component, but very expensive. Not out of reach of a DIY builder, but not readily available and there are numerous less expensive jfets that could be used in the circuit with acceptable results.



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