Page 3 of 5 FirstFirst 1 2 3 4 5 LastLast
Results 21 to 30 of 44

Thread: Otari MKIII Head spot Question and a few beginner questions

  1. #21
    Join Date
    Jul 2009
    Location
    Trending
    Posts
    18,742
    Thanks
    303
    Thanked 874 Times in 763 Posts
    Rep Power
    21470743
    Sign in to disable this ad
    Quote Originally Posted by JoeisREELcool View Post
    I get excited about this stuff.
    I remember those days.
    Not that I'm still not excited by audio gear...but when starting out, every new thing is a big WOW full of excitement and enjoyment.
    That's how we all became gear sluts. Some people don't get it, but for some of us, audio gear can cause a lot of thrills.

  2. #22
    Join Date
    Sep 2019
    Posts
    27
    Thanks
    2
    Thanked 0 Times in 0 Posts
    Rep Power
    0
    Quote Originally Posted by miroslav View Post
    I remember those days.
    Not that I'm still not excited by audio gear...but when starting out, every new thing is a big WOW full of excitement and enjoyment.
    That's how we all became gear sluts. Some people don't get it, but for some of us, audio gear can cause a lot of thrills.
    Yep. When I brought this thing home everyone was like "what are you going to do with that?" And I was like "I'm gonna record and play some really cool high quality music on tape!" And the response was "hmm ok" with some mildly awkward silence.

    We also do a 50's style diner every now and then at my church as a fundraiser for the youth group and young adults to go to special events that require high expense. So I plan on showcasing it there behind some plexiglass panels with a cool description. It would be cool to play music on it if I can get away with it, but that might be a bit much. Although I don't have any professional use planned out for it yet (it would be hard to justify in most cases) I do indeed have plans for it.

  3. #23
    Join Date
    Mar 2011
    Posts
    6
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Rep Power
    0
    Bamel TV, Bamel Rd & 1960, Houston, Texas.

  4. #24
    Join Date
    Oct 2012
    Location
    Hampshire, UK
    Posts
    207
    Thanks
    1
    Thanked 29 Times in 28 Posts
    Rep Power
    8
    This may be obvious but is the frequency response flat when you monitor the input directly? Are both channels set to the same eq curve? Have you tried frequencies lower than 100Hz as there can be a bit of a bump at around 100Hz - some studios would use 50 or 60Hz tones as well or instead of 100Hz to eliminate the potential head bump problem.

    However, the most likely cause of this problem is a little bit of dirt on the playback head - it needs to be scrupulously clean. The other potential problem is that the playback head may not be making good contact with the tape and you may have exacerbated the problem by turning the tape guides so that the tape doesn't wrap around the head as much as it did. It is worth looking at the tape path very carefully and maybe pushing the tape gently against the playback head to see if the response at high frequencies improves.

    Another possibility is that your tape is slightly wider than the tapes normally played on this machine so that the edge of the tape is riding over the edge of the worn area on the head. Some heads have small grooves at the top and bottom to allow for different width tapes to be played with no problems but your heads don't seem to have these grooves. Again, if you have adjusted the guides the tape may now be following a different path across the head which could cause this problem.

    Another thing to check - have you demagnetised the heads?

    That's probably enough to think about for now...
    JRP Music - Audio Mastering and Restoration
    http://www.jrpmusic.co.uk

  5. The Following User Says Thank You to jamesperrett For This Useful Post:


  6. #25
    Join Date
    Sep 2019
    Posts
    27
    Thanks
    2
    Thanked 0 Times in 0 Posts
    Rep Power
    0
    Great! Sounds like a lot of good stuff to go on from your post above.

    I did try marking the heads with a highlighter (the only non perminant media at the time) and checked to see if contact was made evenly across the head by checking with a light. The tape wasn't even touching the very top area of the playback head and the recording head looked like the problem was there too but not nearly as bad. I had tried to check the wrap by applying pressure with a q tip around the heads and I did notice that pressure in general seemed to help quite a bit (albeit still more on one side

    I'd say this is probably for sure all the fault of the guides being turned. The en-even, but consistant, wear is now even and consistant between the guides but the heads aren't lined up to them The tape is definately not hitting the edges which is probably due to all the random tapes they had to play at the station. The wear area is more than wide enough for the tape.

    So, a demagnetizer and an oscilloscope is in order when I get paid this week. I'll wait a week or two to get the cal. tape. Do I need anything else to align the heads to spec.?
    Also how do you put more or less pressure on the tape head?

    PS: I admittedly wound up fooling with the head adjustments after seeing how out of whack the head was.
    I marked the origional position with a line in case I wanted to go back temporarily but I doubt I will.
    I simply moved them for best 10khz response with decent luck. I'm not too worried since I'll have it dialed in soon anyways.

    I'll run some more frequencies through as suggested and see what happens through the range now.

  7. #26
    Join Date
    Sep 2019
    Posts
    27
    Thanks
    2
    Thanked 0 Times in 0 Posts
    Rep Power
    0
    I also cleaned the heads to high heavens before even posting here (hence the initial erase head question). They could probably be cleaned again since I didn't spend a ton of time cleaning after the highlighter thing. And I did A/B the source signal to tape when running the previously mentioned frequencies through. Just to answer the above question.

    I really appreciate you guys' advice. It's saved me tons already

  8. #27
    Join Date
    Oct 2012
    Location
    Hampshire, UK
    Posts
    207
    Thanks
    1
    Thanked 29 Times in 28 Posts
    Rep Power
    8
    If the heads are unevenly worn so much that the tape isn't making contact then you need to think about getting them relapped or, if really bad, replaced. If you are in the USA then the standard advice seems to be to send the heads off to JRF - Head relapping
    JRP Music - Audio Mastering and Restoration
    http://www.jrpmusic.co.uk

  9. #28
    Join Date
    Sep 2019
    Posts
    27
    Thanks
    2
    Thanked 0 Times in 0 Posts
    Rep Power
    0
    I believe JRF also sells heads online as new (probably reconditioned or from scrap machines with little use). I was actually thinking about getting those but I think they are a bit under 150 usd per head, and I haven't priced relapping yet. As much as I would like to go do that, sadly I dont think I'll be able to budget them in for a bit. I'm going to need the test equipment any way you look at it so that's going to be first. Plus any stupid mistakes I do now would be on these worn out things, lol. And at least channel 2 can be made to sound really good(the jury is out on channel one) so It's not like I'll be forced to listen to garbage until then.

    Does any one know what sending out just the heads would cost these days?

  10. #29
    Join Date
    Sep 2019
    Posts
    27
    Thanks
    2
    Thanked 0 Times in 0 Posts
    Rep Power
    0
    Ironically the erase head seems to be fine despite being on the worse side are those contact points surrounded by tungsten carbide or something? And for what it's worth, the tape has virtually zero noise at all at 15 ips.

  11. #30
    Join Date
    Oct 2012
    Location
    Hampshire, UK
    Posts
    207
    Thanks
    1
    Thanked 29 Times in 28 Posts
    Rep Power
    8
    Quote Originally Posted by JoeisREELcool View Post
    Does any one know what sending out just the heads would cost these days?
    I don't know what JRF charge but Uk prices are the equivalent of around $30-35 per head for a re-lap.

    If you have an audio interface you can probably get away without an oscilloscope although there are some cheap ones that you can buy suitable for basic audio use for around $40. You can also use your audio interface as a signal generator so the only test gear you really need is a multimeter - preferably with an RMS measurement.
    JRP Music - Audio Mastering and Restoration
    http://www.jrpmusic.co.uk

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Otari MX5050 mkiii Questions
    By thehammondman in forum Analog Recording & Mixing - Tape & Gear
    Replies: 3
    Last Post: 05-17-2019, 19:35
  2. Otari MX70 1" 8T heads needed / head compatibility question
    By sam humans in forum Analog Recording & Mixing - Tape & Gear
    Replies: 9
    Last Post: 01-29-2013, 03:15
  3. Otari mx5050 mkIII question
    By garbagelarge in forum Analog Recording & Mixing - Tape & Gear
    Replies: 5
    Last Post: 03-07-2006, 16:28
  4. otari mx5050 mkIII question:sync?
    By garbagelarge in forum Analog Recording & Mixing - Tape & Gear
    Replies: 0
    Last Post: 03-05-2006, 19:53
  5. 424 mkIII. help a beginner
    By greyJ in forum TASCAM User Forum
    Replies: 5
    Last Post: 08-28-2004, 11:03

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •