Low level reverb's signal in Music Easel FIXED! by myself.

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ibat
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Low level reverb's signal in Music Easel FIXED! by myself.

Post by ibat » Sat Dec 08, 2018 9:20 am

Hi there.
The spring reverb's signal in my Music Box were very low. After watched several tutorials about repairing damaged spring reverbs I decided to open my Easel to find out about the situation.
I noticed that the spring reverb system wasn't in its' place - springs should be parallel to the tank's frame. Moreover I noticed that springs were accidentally glued.
After correcting position of the springs system and removing the excess glue the reverb has started working correctly! ;)

Image
ooooooooooooo
Image
ooooooooooooo
Image
..:)

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Post by papz » Sat Dec 08, 2018 9:42 am

Gluing the tank connectors is such a useless and stupid idea. :doh:
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Post by ibat » Sat Dec 08, 2018 11:45 am

I think so too :)
I forgot to mention that on the occasion of that operation I tuned up the reverb by removig those two bumper sponges which in my opinion are an unnecessary ballast :)
Last edited by ibat on Sat Dec 08, 2018 6:37 pm, edited 1 time in total.

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Post by construct09 » Sat Dec 08, 2018 3:01 pm

I wondered why the verb on my Bemi easel was so muffled, probably the gobs of silicone all over the length of the springs :roll:

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Post by djs » Sat Dec 08, 2018 9:03 pm

I’m guessing the quality control person was asleep the day this one got made.
"Noise is what the Earth is made of" - David Bowie

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Post by papz » Sat Dec 08, 2018 11:25 pm

The what ? :lol:
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Post by ibat » Sun Dec 09, 2018 7:45 am

:hihi:

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Post by ibat » Sun Dec 09, 2018 7:51 am

construct09 wrote:I wondered why the verb on my Bemi easel was so muffled, probably the gobs of silicone all over the length of the springs :roll:
Or other irregularity.. I reccomend to explore it.

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Post by doepferiano » Sun Dec 09, 2018 12:41 pm

CRAZY!

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Post by doepferiano » Sun Dec 09, 2018 12:41 pm

papz wrote:The what ? :lol:
:lol:

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Re: Low level reverb's signal in Music Easel FIXED! by mysel

Post by rolsteins » Thu Dec 13, 2018 10:16 am

ibat wrote:Hi there.
The spring reverb's signal in my Music Box were very low. After watched several tutorials about repairing damaged spring reverbs I decided to open my Easel to find out about the situation.
I noticed that the spring reverb system wasn't in its' place - springs should be parallel to the tank's frame. Moreover I noticed that springs were accidentally glued.
After correcting position of the springs system and removing the excess glue the reverb has started working correctly! ;)

Image
ooooooooooooo
Image
ooooooooooooo
Image
..:)
Thanks for advice! It turned out I have had the same problem..

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Post by Peake » Thu Dec 13, 2018 11:16 am

The reverb tanks don't have locking connectors so the MTAs which go onto them can under the worst jarring (transportation, shipping) come completely off so I can understand the use of hot glue or Loctite to keep them in place. But perhaps not that much of it, you know?
This is not the place I'd imagined it to be.

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Post by papz » Thu Dec 13, 2018 12:17 pm

I build, service, play, carry, ship and receive 208s or other devices with spring reverb for years without glued connectors and never saw or heard about one coming off, completely or partially. They stay in place firmly and are often so difficult to unplug that I have to use a small flat screwdriver to disconnect them without forcing or damaging the thin wire.
Last edited by papz on Thu Dec 13, 2018 12:33 pm, edited 1 time in total.
Finest EMS gear service and Music Easel/208 goodies

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Post by djs » Thu Dec 13, 2018 12:33 pm

You'd think that if they had a problem (given the hot glue gun 'fix') that they'd say "ok, let's just upgrade to a locking header". I wouldn't think it was a cost thing? Unless there was some other problem that required hot glue to fix it?
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Post by papz » Thu Dec 13, 2018 12:36 pm

No idea, I'm not in their head and I'm happy with that. :mrgreen:
Finest EMS gear service and Music Easel/208 goodies

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I don't offer support of any kind to people attempting to build clones of EMS equipment.

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Post by Peake » Thu Dec 13, 2018 12:59 pm

papz wrote:I build, service, play, carry, ship and receive 208s or other devices with spring reverb for years without glued connectors and never saw or heard about one coming off, completely or partially. They stay in place firmly and are often so difficult to unplug that I have to use a small flat screwdriver to disconnect them without forcing or damaging the thin wire.
If you ship it without foam securing the reverb assembly it can shake around quite a bit and yes, the connector coming off is worst-case scenario but as it doesn't lock at all it's potentially prone to disconnection. Obviously I'm not saying use enough glue to run all over the place. Over time screws can come loose, etc. One less thing to worry about is good.

I've worked with synths for decades as well. Things that can go wrong, sometimes will. I've had loose connection inside a fuse once. The universe has a way to create little surprises such as that, you know.
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Post by ibat » Thu Dec 13, 2018 3:29 pm

Peake wrote: Things that can go wrong, sometimes will. I've had loose connection inside a fuse once. The universe has a way to create little surprises such as that, you know.
This is natural perversity of inanimate objects :alien:

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Post by papz » Thu Dec 13, 2018 5:34 pm

The natural perversity of animate humans may be in cause too. :lol:
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I'm not a synths dealer and I'm not aware of an inexpensive Synthi secret market, please don't ask me if I know one for sale.
I don't offer support of any kind to people attempting to build clones of EMS equipment.

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Post by djs » Thu Dec 13, 2018 7:27 pm

I'm going to go one further and posit a supernatural cause. The music easel is possessed by demons that are entrapped by hot glue.

Do not meddle with things you do not understand. That which is not reverberating can eternal lie. And with strange easels, even oscillations may die.
"Noise is what the Earth is made of" - David Bowie

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Post by mestlick » Fri Dec 14, 2018 12:25 pm

Ha. With strange Easels, even infinitely sustained envelopes die.

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Post by Peake » Fri Dec 14, 2018 3:28 pm

papz wrote:The natural perversity of animate humans may be in cause too. :lol:
All mechanical devices are subject to degradation over time. I prefer to diminish some possible issues as I'm thinking in terms of decades of use when possible. If the world hasn't yet proved to you what can go wrong, will, well, good luck with learning that.

Sometimes entropy has help. I'm going to continue to glue things; you do what you want.

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Post by papz » Fri Dec 14, 2018 8:01 pm

Please get down off your high horse. My joke refers to the initial post pics, not to you.
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Post by Buchla U.S.A. » Thu Dec 20, 2018 12:00 pm

Hey, everybody!

The purpose of the glue isn't to hold the connectors in place, but rather to keep the component below the connectors in place, as it is susceptible to vibration that causes its connecting wire to break.

The foam isn't present on all Easels, but was an attempt to mitigate against the tank vibration that caused the connection to break. The tank, being mounted on springs to reduce interfering vibration of the actual reverb springs, moves around quite violently with even mild movement. The foam was an initial attempt to diminish that vibration.

Buchla U.S.A. Quality Control currently investigates reverbs that don't "sound right."

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Post by papz » Thu Dec 20, 2018 12:12 pm

Buchla U.S.A. wrote:to keep the component below the connectors in place, as it is susceptible to vibration
Do you mean the springs ? :lol:
Finest EMS gear service and Music Easel/208 goodies

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Post by ibat » Thu Dec 20, 2018 6:12 pm

Buchla U.S.A. wrote:Hey, everybody!

The purpose of the glue isn't to hold the connectors in place, but rather to keep the component below the connectors in place, as it is susceptible to vibration that causes its connecting wire to break.

The foam isn't present on all Easels, but was an attempt to mitigate against the tank vibration that caused the connection to break. The tank, being mounted on springs to reduce interfering vibration of the actual reverb springs, moves around quite violently with even mild movement. The foam was an initial attempt to diminish that vibration.

Buchla U.S.A. Quality Control currently investigates reverbs that don't "sound right."
Thank you very much for explication.

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