Whats the reason my tape machine loses high freq. in repro ?

[myles]

Head wear, alignment, azimuth, aging components... a Studer is a beautifully made but complicated machine and the difference between "working fine but won't line up" and "working fine, sounds great, lines up and makes me happy" can take time and be expensive.

[Bill@AudioVision]

Make sure you are definitely on the repro head. As I remember, A-80s had two outputs per channel - 'monitor' and 'repro'. Monitor was for the sync (record) head play during overdubs and was patched to the monitor section of a split (European style) console. It also was band limited and didn't spec out as far as the repro head did. The actual play head had it's own outputs and was patched to channel inputs for mixing.

[u b k]

First thing I'd check is the simplest: clean the heads. Dirty heads are the primary cause of hf loss on decks. The fact that it's only a couple of channels doesn't give me a lot of hope, but it's the first thing to look for.

If that's not it, you've got a proper tech situation on your hands, because it could be any number of things, or several at once.


Gregory Scott - ubk

[audiotech]

Yes, clean and demagnetize the heads and everything that the tape comes in contact with. Have you used the 2" pre-recorded alignment tape to actually check the response of the playback system? This is the very first thing that has to be done before fiddling with the record or bias adjustments. If the bias is set too high, this will also account for loss of high frequencies being recorded on tape and also for hearing that lack of high frequency on playback,

Dennis

[myles]

It sounds like you might want to spend some time on the MRL website: MRL Calibration Tapes

They have a ton of really informative articles and papers on how to maintain, align and set up tape machines.

[RFZ DUDE]

usually when installing a machine of that quality & size you should have a real expert come over and check / adjust every little detail.
those things arent really user serviceable.

good luck!

[Hide]

Originally Posted by myles

It sounds like you might want to spend some time on the MRL website: MRL Calibration Tapes

I recommend it too.
It's MUST HAVE item for r2r owners.

And... oscilloscope too.

[Studerfreak]

Clean the heads, demagnetize the heads, check playback response of the PLAYBACK AMPLIFIERS with a prerecorded test tape.

Just a question: You did not by any chance try to record 10Khz at full level, did you ?

Better: Leave the alignment of such a machine to professional.
Even better: Get an maintenance engineer that has experience with Studer multitracks and let him check the beast mechanically and electronically.
Studer machines are built to last forever.
But they need a bit of tampering and loving care.....

[Rea]

Thanks all.

Im gettingn this vu reading while aligning the repro playback head with an MRL tape.
At this point its nothing to do with the record/sync head
Im having less high freq response on a few channels. I mean the meter reads -3 db at 10k playback off the MRL

[RFZ DUDE]

test tapes are just a minimal part of adjusting such a machine, mechanics ect. are to be taken care of before you can even think of putting a tape on.thats exactly why every second test tape out there isnt actually a test tape anymore...

[danly]

are all the channels the same part number? ex. 1.080.793 ? 1.080.692. you find the # on the back of each channel near the remote plug.
if they are all the same, find someone who can recap.
and send your heads to JRF for an evaluation.
also, do you have the remote..?

[CthonicEwes]

Really dumb suggestion: try tapping on the meters, especially the ones that seem to be reading low. Maybe they just need a bit of "exercise."

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