Author Topic: Hum canceller problem (Read 488 times)

germansal · « **on:** December 05, 2015, 06:11:58 AM »

Hi everybody I ve noticed yesterday that my h canceller of my 79 series is moving,how can I adjust this?

gtrguy · « **Reply #1 on:** December 05, 2015, 11:15:23 AM »

The little buggers are usually glued in!

terryc · « **Reply #2 on:** December 06, 2015, 02:01:13 PM »

Double sided adhesive tape

keith_h · « **Reply #3 on:** December 06, 2015, 02:35:34 PM »

I recall seeing something about using super glue because a firm tap will tend to unseat the hum canceler allowing it to be removed. I would not use a lot if I were to try it and suspect a drop or two would do the trick.

Keith

sonicus · « **Reply #4 on:** December 06, 2015, 02:55:05 PM »

I have been told that the humcanceller on my 73-32 is most likely fixed in place with epoxy as was likely in some of the early serial number instruments . I am under the impression that the method of hum canceler installation varied over the years as various luthiers passed by through history . In my best estimation Alembic proprietary advice is the last word on such a matter to pinpoint an effctive method of correction for the instrument in question .

Wolf

keith_h · « **Reply #5 on:** December 06, 2015, 03:20:25 PM »

It was my recollection of Mica saying to use super glue so it would be removable later by firmly tapping it. She has also said don't use epoxy as it would likely result in damage should the hum canceler ever need to be removed.

Keith

serialnumber12 · « **Reply #6 on:** December 07, 2015, 05:52:45 AM »

firmly glued in place.

mica · « **Reply #7 on:** December 07, 2015, 03:25:13 PM »

We usually use superglue, but there have been people in the past that were epoxy crazy and used it here. In 1979 it was probably superglue. If it gets a good whack, the brittle bond can break. but that's good... just pull it out, add a little more glue under and replace.

You could use a double sided tape like carpet tape if you like.

You can also shim stuff along the edge to wedge it in place - veneers of wood, matchbooks, whatever works.

This is for hum cancellers between the pickups, not like the ones mounted in the cavity like Keavin's above.

germansal · « **Reply #8 on:** December 07, 2015, 03:51:52 PM »

OK THANKS FOR YOUR HELP IVE SOLVED THE PROBLEM

sonicus · « **Reply #9 on:** December 07, 2015, 05:43:39 PM »

Mica , I think you might of mentioned that the brass block in my 73-32 may have been installed with epoxy as well ( one of the epoxy use instruments ). When I was in the process of cleaning up the bridge I noticed that the brass block was not going to come out with any kind of gentle method. I just carefully polished with the Flitz with the brass block in place . With a little blue tape protection the job got done all safe and sane . .

If any one else has a brass block like mine ( epoxied) this method of cleaning worked nicely for me .

Wolf