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Binson Echorec Repainting

Test panel for Binson Echorec paint job

This photograph shows a test panel paint job for a customer who wanted their Binson Echorec echo-delay machine to be restored to ‘as new’ condition. To achieve this beautiful finish two coats are applied to the bare metal. A metallic silver base coat is applied first and then this is overcoated with a translucent gold. There’s a huge amount of depth to the finish and variability in the gold second coat that gives it an almost ‘sunburst’ appearance where the paint gets a little darker towards the edges. It’s a very challenging process to get right, however it looks spectacular when done properly. The work was undertaken by Brian Hammond of Potteries Powder Coating, a local company who do the powder coating for all Effectrode pedals.

11 comments

  1. Wow! This looks amazing! It’s definitely a great work.

  2. David Waters says:

    Hi Phil.
    I have been enjoying your Binson Echorec articles very much. Thank you for taking the time to write them. One question l have is why did Binson use a rubber jockey wheel to drive the drum and not a direct drive? Could this be done with a DC motor?
    Thanks again!

    • Phil says:

      Hi David, I’m sure some smart engineer could have figured out how to implement a direct drive Echorec, however there are advantages to idler wheel driven turntables. Best, Phil

  3. Eduard says:

    Hi Phil,

    Are you planning on making and taking the echorec 3 in production? If you would make one I would definitely buy one.

    Cheers

    Eduard

    • Phil says:

      I am Eduard. The delay project is being worked on constantly, but presently a low priority. We’ll be posting information shortly. Best, Phil

      • Grant says:

        I already have most of your pedals and they are GREAT!
        However it’s been a long wait for your Echorec, I’m still living in hope that one day I’ll own one so hope it moves up the priority list soon….I’m getting older and don’t want to die before I can get one.

  4. Alexander says:

    Hi Phil,

    How can I contact you to clarify the information in your article about Echorec 2 “Checking the Bias Voltage” http://www.effectrode.com/binson-echorec-pages/bias-oscillator-inductor/
    where I found, I think, one inaccuracy and one misprint?. I, of course, can be wrong, but this refinement greatly affects the solution of the problem with my own Echorec 2 which I just restored from absolutely dead.

    1. The article says:
    “IRMS = VRMS / √(R2 + XL2)

    where, √(R2 + XL2) represents the impedance, Z of the record head

    IRMS = 210 / √(6002 + (2π × 58,000 × 0.9)2) = 0.64mV”

    It seems to me the current is measured in Amps. Is it correct to write IRMS = 0.64mA?

    2. The article says:

    “measurements taken from my own model T7E were 300VP-P (210VRMS) and 58KHz.”

    When I measured my own P-P was about 300V but RMS was exactly two times lower than on your measurements namely about 105V.
    It’s because: Vrms = 0.3535 * Vpp.
    In your case was shown RMS and Vmax but not Vp-p because: Vrms = 0.707 * Vmax

    This was the stumbling block in comparison with my results.

    On the one hand, we have the same values of P-P and on other hand we have the double difference of RMS measures. But you used the RMS volume of voltage in current calculation formulas

    Could you tell me what you measured actually?

    I’ve been studying your article so closely because I have the same voltage, but I can not get the 500mV on the anode of playback tube as indicated in all the circuits. At me leaves 50mV, no more.
    I would also like to know what voltage should be directly on the playback head. But I do not know who would help me in this.

    Sorry for too much words.
    And thank you for this beautiful corner of history of the great device!

    Kind regards,
    Alexander

    • Phil says:

      Hi Alexander,

      Thankyou for your message. In answer to your questions:

      1. Yes, it certainly does look like I’ve made a typo and the units should be in mA and not mV. I’ll correct this – thank you for bringing my attention to this mistake.

      2. Regarding the second issue of RMS voltage. I can confirm the 300V P-P bias voltage I models correct, however my calculated RMS voltage of 210V is incorrect. I should have used the V Peak and not V Peak-to-Peak, which would have given 105V. I attempted measuring the bias voltage directly on the record head with a ‘Fluke’ digital voltmeter and the measured voltage was only 30V. I then made the same measurement with an old analogue meter an measured about 70V. I suspect these are not accurate measurements, for instance, the manual for my Fluke 73 specifies a 45Hz to 500Hz frequency range for AC voltage measurement. This might explain why I’m only measuring 30VRMS for a 300V P-P 58KHz sine wave.

      I hope this helps your on your way with your Binson repair. Good luck with getting her going again.

      Best regards

      Phil

      • Alexander says:

        Thanks for your comments Phil and the wishes about my Binson.

        I’ve measured with oscillosope my p-p and RMS on the rec head and as I wrote it was 300Vp-p and 105V RMS. Now I tried to measure with Fluke 106 multimeter and it shows 203V right now :)

        But I still can not solve the riddle, as when submitting to the input 1mV can be obtained at the output of the playback amplifier 500mV?

        Did you measured all of the points of the original schematics with 1mV on the input?

        I’ve got 60-70 mV on playback out but no more and I can’t find somebody who measured 500mV with 1mV on input yet.

        But my unit is working with those measures. I have the same level of dry signal as the bypassed and I have the wet with the same level maybe little more.
        And this is surprises me when I see on the diagram 0.5V on playback with 1mV 1kHz on the input.

        Kind regards,
        Alexander

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