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Thread: Yet another B77 sorted

  1. #1
    Join Date: Aug 2012

    Location: Hartlepool UK

    Posts: 1,561
    I'm Alan.

    Default Yet another B77 sorted

    I have just done another complete recap service and recalibration of a Revox B77
    https://pinkfishmedia.net/forum/thre....243500/page-5
    Alan
    Turntable - Garrard 401/Jelco 750L/Ortofon Kontrapunkt B, Pioneer PLC 590, SME 3009/2 , Denon DL103R - DIY Paradise Phono stage - Reel 2 Reel Studer A810, Otari MX55,Tascam BR20, Revox A77, B77, PR99, TEAC X1000 & 3440, Technics RS1500 - Digital HTPC / Young Dac - Preamp - DIY B4, 821, Power Amp's DIY Voyager Mono Block, Speakers Tannoy precision 6.4 / Wilmslow Kit Volt BM220.8 / Scanspeak D2905/9500

  2. #2
    Join Date: Mar 2008

    Location: Galashiels

    Posts: 13,290
    I'm inthescottishmafia.

    Default

    Nice job!
    “Music has always been a matter of energy to me, a question of fuel. Sentimental people call it inspiration, but what they really mean is fuel. I have always needed fuel. I am a serious consumer. On some nights I still believe that a car with the gas needle on empty can run about fifty more miles if you have the right music very loud on the radio”

    Hunter S Thompson

  3. #3
    Join Date: Aug 2012

    Location: Hartlepool UK

    Posts: 1,561
    I'm Alan.

    Default

    Thanks Ali
    This is the cleanest B77 I have seen, it sounds great as well

    2020-10-03_06-50-28 by Alan Towell, on Flickr

    Alan
    Turntable - Garrard 401/Jelco 750L/Ortofon Kontrapunkt B, Pioneer PLC 590, SME 3009/2 , Denon DL103R - DIY Paradise Phono stage - Reel 2 Reel Studer A810, Otari MX55,Tascam BR20, Revox A77, B77, PR99, TEAC X1000 & 3440, Technics RS1500 - Digital HTPC / Young Dac - Preamp - DIY B4, 821, Power Amp's DIY Voyager Mono Block, Speakers Tannoy precision 6.4 / Wilmslow Kit Volt BM220.8 / Scanspeak D2905/9500

  4. #4
    Join Date: Mar 2008

    Location: Galashiels

    Posts: 13,290
    I'm inthescottishmafia.

    Default

    Looks like it just rolled off the line. Never heard one, like to sometime.
    “Music has always been a matter of energy to me, a question of fuel. Sentimental people call it inspiration, but what they really mean is fuel. I have always needed fuel. I am a serious consumer. On some nights I still believe that a car with the gas needle on empty can run about fifty more miles if you have the right music very loud on the radio”

    Hunter S Thompson

  5. #5
    Join Date: Aug 2012

    Location: Hartlepool UK

    Posts: 1,561
    I'm Alan.

    Default

    Here is a frequency response check following calibration of the B77 at 7.5 & 15 IPS

    https://www.youtube.com/watch?v=d2O3h3tMt2Q

    Alan
    Turntable - Garrard 401/Jelco 750L/Ortofon Kontrapunkt B, Pioneer PLC 590, SME 3009/2 , Denon DL103R - DIY Paradise Phono stage - Reel 2 Reel Studer A810, Otari MX55,Tascam BR20, Revox A77, B77, PR99, TEAC X1000 & 3440, Technics RS1500 - Digital HTPC / Young Dac - Preamp - DIY B4, 821, Power Amp's DIY Voyager Mono Block, Speakers Tannoy precision 6.4 / Wilmslow Kit Volt BM220.8 / Scanspeak D2905/9500

  6. #6
    Join Date: Aug 2012

    Location: Hartlepool UK

    Posts: 1,561
    I'm Alan.

    Default

    Totoman is the owner of this Revox B77 and he also sent me his remote control for service
    I works great and gives a latching pause function that the B77 doesent have

    https://www.youtube.com/channel/UCMV..._as=subscriber

    Alan
    Turntable - Garrard 401/Jelco 750L/Ortofon Kontrapunkt B, Pioneer PLC 590, SME 3009/2 , Denon DL103R - DIY Paradise Phono stage - Reel 2 Reel Studer A810, Otari MX55,Tascam BR20, Revox A77, B77, PR99, TEAC X1000 & 3440, Technics RS1500 - Digital HTPC / Young Dac - Preamp - DIY B4, 821, Power Amp's DIY Voyager Mono Block, Speakers Tannoy precision 6.4 / Wilmslow Kit Volt BM220.8 / Scanspeak D2905/9500

  7. #7
    Join Date: Mar 2008

    Location: Galashiels

    Posts: 13,290
    I'm inthescottishmafia.

    Default

    Nice!
    “Music has always been a matter of energy to me, a question of fuel. Sentimental people call it inspiration, but what they really mean is fuel. I have always needed fuel. I am a serious consumer. On some nights I still believe that a car with the gas needle on empty can run about fifty more miles if you have the right music very loud on the radio”

    Hunter S Thompson

  8. #8
    Join Date: Sep 2019

    Location: North Lincolnshire

    Posts: 167
    I'm Lloyd.

    Default

    Looks great .... a friend has an old revox in his loft that he bought in the late 60s or early 70's i keep asking him to get it down ...

  9. #9
    Join Date: Aug 2012

    Location: Hartlepool UK

    Posts: 1,561
    I'm Alan.

    Default

    Here is an independent review of the B77 on some test tone files by Werner on PFM

    I had a quick look at Richard's B77 files.

    At 15ips the right channel is 0.4dB below the left one, but this may also be part of the measurement chain, not the deck per se.
    Frequency response is very even, smoothly dropping 1dB between 400Hz and 20kHz, both channels tracking perfectly. At +3VU distortion is a mere 0.2%.

    At 7.5ips distortion rises to 0.4% at +3VU. The loss at 20kHz is now -1.8dB relative to 400Hz. Bass also is a bit depressed, -2.3dB at 30Hz.

    Both speeds have a bit of 50Hz breakthrough, plus harmonics in the right channel.

    Overall a very nice restoration.
    Turntable - Garrard 401/Jelco 750L/Ortofon Kontrapunkt B, Pioneer PLC 590, SME 3009/2 , Denon DL103R - DIY Paradise Phono stage - Reel 2 Reel Studer A810, Otari MX55,Tascam BR20, Revox A77, B77, PR99, TEAC X1000 & 3440, Technics RS1500 - Digital HTPC / Young Dac - Preamp - DIY B4, 821, Power Amp's DIY Voyager Mono Block, Speakers Tannoy precision 6.4 / Wilmslow Kit Volt BM220.8 / Scanspeak D2905/9500

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