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Lectrolab R500-B provided...

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  • Lectrolab R500-B provided...

    Not a request, but a provision!

    A few notes: 1959 issue.
    the 6V6s are basically run @ datasheet, so now ~350 on the plates, 240 screen. I tried upping the screen volts, but it hummed. There were no cathode bypass caps on the 12AX7s, so it was pretty clean and wimpy. When added, it's definitely got a Neil Young vibe. Plenty bright when cranked and you lift it to ear level.This one had a crappy 1965 Utah in it, horrible. But, due to chassis design, I think it was the only speaker that would fit. Speaker selections are limited, so the owner got a 10" conversion baffle. The heaters are the one-side-to-ground arrangement, but the amp is pretty quiet. It's true PTP with just a couple terminal strips, and the first 12AX7 is pretty cramped.

    Do not place your beer or cigarette on the cabinet - it's cardboard and paper-covered a la Danelectro.
    Attached Files
    "Wow it's red! That doesn't look like the standard Marshall red. It's more like hooker lipstick/clown nose/poodle pecker red." - Chuck H. -
    "Of course that means playing **LOUD** , best but useless solution to modern sissy snowflake players." - J.M. Fahey -
    "All I ever managed to do with that amp was... kill small rodents within a 50 yard radius of my practice building." - Tone Meister -

  • #2
    I just did some work on the newer version of this amp. It was the s600. With a modern ceramic speaker, cathode caps across the cathode resistor and changes to the input jack resistors this was one of the best small power amps I ever heard.

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