Search results

  1. C

    Studer A807 wont play

    OK, I will order the caps soon. Will get back to you. Thanks Carlos
  2. C

    Studer A807 wont play

    Hi I am in Malaysia (located in South East Asia). I have recapped the entire machine about 2 years ago except the large power supply fllter caps. I was unable to source the exact type( with a bolt underneath for mounting). I would look around again to replace them, maybe that is the probable...
  3. C

    Studer A807 wont play

    Hi I am having a problem with my Studer A807. When I press "play", the pinch roller engages but disengages after 1 or 2 seconds. At times it engages and plays for a while and then it disengages and stops. After checking, I realise that the pinch roller engages but the capstan is not turning. At...
  4. C

    Studer A807 cannot playback

    Hi My Studer A807 has suddenly stop playing. I can rewind and fast forward but when I press play, the tape is not moving. What can possibly be the problem. Thanks
  5. C

    Revox B77 motor problem

    Hi I am having this problem with my Revox. When I start play, at the beginning, there is no problem and it plays as normal. After about 40 mins, there is a slight drag. The take up motor gets very hot and there is no torque. If I place my finger on the motor, just lightly it slows down and it...
  6. C

    Revox B77

    Hi I am having a problem with my revox B77 while recording. If I playback a pre recorded tape, it sound clean and noise free. If I make a new recording and play it back, at the beginning both sides sound clean and noise free. After about 30 mins, one side starts to have some noise(frying sound)...
  7. C

    Studer A807 motor problem

    Today, I took the readings at Test Pt2(Tacho). There is a 7.5V DC reading. When I switch ON the recorder, my digital multimeter shows a reading of around 75 Hz. When I press play, the reading goes up to around 7.2 to 7.5KHz and more at times. Even though I select different speeds, the frequency...
  8. C

    Studer A807 motor problem

    Hi I am having a problem with my studer. When I press play, the recorder does play, but the take up motor (right hand side) moves slower than the supply motor (left hand side). What happens is that the excess tape from the left reel gets stuck into the reel. It looks like both the motors are...
  9. C

    Studer A807 recording only on 1 channel

    I am not sure, but I think it is MK1. The software version shows October 1989.
  10. C

    Studer A807 recording only on 1 channel

    Hi Earlier I had a problem of unable to record at 15ips with this recorder. I rectified the problem with the guidance from the forum. The problem was the bias setting was at zero for 15ips. After that it was recording OK all this while until recently. Now when I record, both channel start...
  11. C

    Studer A807 recording at 15ips

    Hi I have been doing recordings on my A807 at 7.5ips all this while. Now I tried recording at 15ips, but it is not recording at all. I have set to "Record Ready", pressed the "input" and "line on" buttons but the VU meters do not show of any input signal present. Does this machine need to the...
  12. C

    Putting out feelers to sell one or two Studer A807

    Hi, Are there any left for sale. Thanks
  13. C

    Studer A807 Audio Card

    Hi I have an old Studer A807. The record head is 1.318. and has badly worn out and I intend to replace it with a 1.317. which a friend gave me. I came to know that to replace a 1.318 record head with a 1.317, certain modification has to be done. What I realise is this : According to the...
  14. C

    Studer A807 MK1

    Hi There is another thing I noticed. I set my DMM on TP2 and TP3 to monitor the erase head voltage while recording. Also I select the "Repro" switch while recording, to monitor the output thru my amp. When I start the recording, the voltage goes up to approx 7.3V and then settles at approx...
  15. C

    Studer A807 MK1

    Dear Charles, I badly need your assistance as I am struggling with this problem for almost a month. This recorder belongs to a very close friend of mine. Originally it had a problem with both channels, poor recording level and muffle sound. I told him that I work on amplifiers only but he...
  16. C

    Studer A807 MK1

    Hi Charles, I do not have a pre-recorded tape and do not know whether the playback using a originally recorded tape is OK or not. What I have done is, I have hooked up the XLR input of the recorder to the RCA (unbalanced) "rec out" of my amp and do the recording. When playing back the recorded...
  17. C

    Studer A807 MK1

    I have replaced every electrolytic capacitor on this machine (every board) except the 4 power filter capacitors ( Three 22,00uf & one 10,00uf). I have tried to set the "Erase current and and "Bias" by adjusting T3 and L3 according to the manual as a pre-adjustment before using the calibration...
  18. C

    Studer A807 MK1

    Hi The right channel of my recorder has a very muffled sound, when I play back after recording. I was advise to recalibrate the machine. Referring to the manual, before using the Calibration tape, some pre-alignments have to be done. The erase current and bias pre-adjustment is to be done...
  19. C

    Studer A807

    Hi Setting the tape tension, as according to the manual. Connect meter to TP2(ground) and TP5(+) on the "spooling motor control PCB". Hold the right tape pancake and press FAST FORWARD. I get a reading of 10.02V on my DMM (should read 10.0V according to manual). Next connect meter to...
  20. C

    Studer A807

    Hi After recording from a CD player, I play back the recording using "sync" as usual. During playback, the left channel is clear and the high frequencies are clearly heard, but the right channel sound very bassy lacking high frequencies. I suspected the recording head because the head has...
  21. C

    Studer A807

    Hi, Now I have replaced all the caps on the machine. And now I face another problem. The rewind and fast forward works normal, but when I press "play", the tape plays at a fast speed, then slows down, fast again and then slows down again and eventually stops. What I mean is that the speed is...
  22. C

    Studer A807

    Thanks Ki Choi. This morning while trying to calibrate the machine in accordance to the manual, I had another problem. The tape started playing as normal, then it started to slow down and eventually stop dead. I pressed "play" again but the tape tension lever and the pinch roller doesn't...
  23. C

    Studer A807

    Yes, I downloaded online. I will check all the capacitors on the two control boards as suggested. I am wondering whether the problem can be with the calibration as according to my friend , the recording was normal previously and he did not meddle with any calibration controls. Anyway I will...
  24. C

    Studer A807

    Thanks Ki Choi, the 50V fuse stop blowing after sometime, but the +15V and -15V keep blowing constantly. I opened out the power supply board and checked all the bridge rectifiers. Both the +15V and -15V bridge rectifiers had shorted. After replacing the diodes, now it is working normal. My...
  25. C

    Studer A807

    Hi I am new to this forum. A friend of mine brought this reel to reel to get it fixed. The problem was, the fuses keep blowing. When I first ON the tape player there was no lights on any indicator and the VU meter was dead. Upon opening, I realise that 3 fuses, the +15V, -15V and +50V have...

About us

  • What’s Best Forum is THE forum for high end audio, product reviews, advice and sharing experiences on the best of everything else. This is THE place where audiophiles and audio companies discuss vintage, contemporary and new audio products, music servers, music streamers, computer audio, digital-to-analog converters, turntables, phono stages, cartridges, reel-to-reel tape machines, speakers, headphones and tube and solid-state amplification. Founded in 2010 What’s Best Forum invites intelligent and courteous people of all interests and backgrounds to describe and discuss the best of everything. From beginners to life-long hobbyists to industry professionals, we enjoy learning about new things and meeting new people, and participating in spirited debates.

Quick Navigation

Home Forums Contact us

User Menu

Login
Steve Williams
Site Founder | Site Owner | Administrator
Ron Resnick
Site Co-Owner | Administrator
Julian (The Fixer)
Website Build | Marketing Managersing
Top Bottom