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Amplifier Class – Build Your Own EL84 Amp

January 19 @ 12:00 am - January 31 @ 12:00 am


The October Muse Tech Talk is about a great DIY opportunity.  David Hicks writes: “I was fortunate enough to take one of Ed’s phono stage building classes at the Randall, and I can say, I learned a lot, met some great people who became friends, and had a ton of fun and ended up with a terrific piece of audio equipment.”

Edwin is announcing a new amplifier class:

I am pleased to announce a new tube audio DIY class at San Francisco’s Randall Museum. It’s been a few years since I taught one of these DIY classes, but I’ve just created a new project that I want to share.  For this class, I designed a push-pull EL84 stereo amp “The Randall IV”. Beware that this is not your run of the mill EL84 job. The goals of the amp are; sound as close to a live performance as possible, keep the cost down, minimize the component count so that it will be easier to build, must look pleasing both inside and out.

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Details for those interested in taking the class and building the Randall IV:

Randall Museum 199 Museum Way, San Francisco, CA 94114.
10 two-and-a-half-hour Saturday sessions from 1/12/19 to 3/16/19.
Parts cost (less tube set) is $375.00.

Registration opens on 12/15/18 https://apm.activecommunities.com/sfrecpark/Activity_Search

Register early. The size of this class will be limited.

Class Title: Tube Audio DIY

Class Number: 18573

Class Fee: $310 for Randall Friends members and $315 for the general public (does not include materials)

Email me (Ed Yang randallphono@yahoo.com) If you have a question about the class or Randall IV amp.

Enter number of tickets you'd like below:


January 19 @ 12:00 am
January 31 @ 12:00 am