Lectrolab Tube Amps

Lectrolab Amplifiers are cheaply made tube amps from the 1950s and 1960s. They were made by Sound Projects Co. Cicero, Ill., which might suggest that they had something to do with Valco. Once source tells me that Sound Projects was a subsidiary of Bell Labs. Gibson, Valco, Epiphone, Kalamazoo and Lectrolab were all made within 50 miles of each other. The Chicago area built some of the great guitar amps. Workers moved from factory to factory and some set out on their own to start their own factories.

Lectrolab amps are the great tube amp in the cheapest box that could be made. The cabinets for these amps are made of pressboard. No shortcuts were left untaken in their manufacture. As a result, there are not that many of these around.

On the plus side, off the shelf electronic components were of fairly good quality in the late 1950s, and the amps that have survived have great tone and are a good inexpensive alternative to expensive collectable amps.

I have collected a few pictures here. If you have some good photos of a model that I don't have, please mail it off to me. Click on the images to see full size. There seems to be three series. The later ones have a 'B' and a 'C' appended to the model number.

Read about Jeff Brobofsky's experience restoring a derelict R800.

Lectrolab R200 - Tubes are 12J5 - 12J5 - 50L6 - 35Z5 (Pots Dated 1957)

Lectrolab R300 - Tubes are 6SN7 6V6 5Y3
Lectrolab Model 402 - Tubes are 35w4, 50c5, 12AU6. This was made in Venice Florida. If it is not a Harmony, I don't know what is.
Lectrolab R500B - Tubes are 2-12AX7s, 2-6V6, 1-5Y3 (Speaker Date 1961)

Lectrolab R500C - Tubes are Two 12ax7's, two 6BQ5/EL-84, a 6AU6 and a 6CA4 (Dated 1965)

Lectrolab R600B - Tubes are 2-6v6, 1-65h7?, 1-5y3, 2-7025/12ax7 (Dated 1961)

Lectrolab R700C


Read about Jeff Brobofsky's experience restoring a derelict R800.

Lectrolab S950 Head - 2 - EL84 and several 12AX7

Unknown Model Early Lectrolab (looks like a Valco to me)

I will be adding more amps as I can find them.



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I cleaned up my tab for Sonny Boy's Help Me and made it into a short book. There's a Kindle version for 99 cents, and if you buy the paperback you get the Kindle free.

Playing "Help-Me" In the Style of Sonny Boy Williamson II: A step by step, note for note analysis of some of Sonny Boy's Signature Riffs

I also write Science Fiction, so you can sample some of my best stories. Also available in Kindle format.

Error Message Eyes: A Programmer's Guide to the Digital Soul

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The JT30 Page Popular links

I began collecting data about the microphones used by blue harp players before there was an internet. I began organizing it into JT30.com in the late 1990s. I accumulated more stuff than I remember. This is some of it.

Street Theory

A Harp Player’s Guide to Music Theory

Learning Harp

Picking Up Blues Harp

A guide to learning to play Blues Harp

Microphone Information

Usenet Articles

Harp Amps

I've been collecting Harp Amps for a while. This is the old Harpamps.com website. There is lots of information here. Here a coupld of links.

Harp Tab

A collection of songs and riffs that I’ve worked out over the years, plus some libraries of stuff I’ve converted to tablature. I’ve included most of the notes and instructions that helped me when I was learning to play blues harmonica.

Basic Riffs Simple harp tabs for songs Blues riffs and phrases.

Harp-L Archives 1992 to 2002


Harp Frequently Asked Questions