[Jukebox-list] Ami Continental Tweeter distortion...

[Daniel Gray]

Hello!

I have plugged in a speaker to the amp and the noise is not there. So this 
has narrowed it down to speaker or crossover issues.

I have had a closer look at the crossover and the connection is held 
together by an elastic band. I took this off and realised the terminal is 
actually broken/loose. Without the elastic band I don't get sound through 
the horn. Could this be the problem?

It seems that the louder the volume, the distortion becomes more obvious. At 
a low volume there is no distortion. This leads me to think that it is a 
problem with the horn itself...

What do you guys think?

Daniel


>From: "Nigel Pugh" <pughn at npsyssoft.force9.co.uk>
>Reply-To: Jukebox mailing list <jukebox-list at lists.netlojix.com>
>To: "'Jukebox mailing list'" <jukebox-list at lists.netlojix.com>
>Subject: RE: [Jukebox-list] Ami Continental Tweeter distortion...
>Date: Thu, 6 Sep 2007 18:05:27 +0100
>
>Hi,
>
>Just read this one.
>
>Continental 1 should have a horn as opposed to a tweeter. To you know if it
>is the original horn, or a modern day piezo replacement ?
>
>If it's a piezo replacement, you will need to connect the 2 wires to
>different tags on the amplifier auxiliary speaker outputs, as opposed to
>connect directly to the wires of the original horn.
>
>Is it a lack of bass that is accentuating the high frequency output at all 
>?
>
>Tey connecting a hi fi speaker to the output terminals on the amp, and see
>if it sounds ok through that speaker. That should eliminate speaker issues
>(and crossover - have you checked connections there) from amp/cartridge
>issues.
>
>On the subject of the arm, the C1 does have the helper spring. If the 
>shrill
>is only at certain points in the record then it could be that, the cut off
>switch, or tone arm cables binding a bit (replace them if original).
>But my money is on speaker wiring / the treble speaker itself and its
>connection, amp. Parallel your cartridge wires up i.e. join l+r + together
>and l+r - together.
>
>Hope that helps a bit,
>
>Nige
>
>-----Original Message-----
>From: jukebox-list-bounces at lists.netlojix.com
>[mailto:jukebox-list-bounces at lists.netlojix.com] On Behalf Of Ron Rich
>Sent: 05 September 2007 16:54
>To: Jukebox mailing list
>Subject: Re: [Jukebox-list] Ami Continental Tweeter distortion...
>
>Daniel,
>   Just a thought, or two--If it sounds crisp at times, I might think the
>problem might be one or more of the following---needle tracking pressure?
>Also be sure that the tone arm is not "pulling" the needle to one "side" of
>the NPAC. The arm MUST be totally free to follow the grooves in the record.
>Mounting angle of the NPAC?
>   I can't re-call, does the tone arm have the "helper spring", or is it
>supposed to have it, on that model?  If it sould be there and is not, that
>will affect the tone arm movement. The tone arm wire is always suspect too.
>Be sure it has not become too stiff.
>   Hope that helps. Ron Rich
>
>Daniel Gray <dj_daniel88 at hotmail.com> wrote:
>   Hi everyone,
>
>I've got an ami continetnal 1 which is in its very final stages of
>restoration, but I want to fix this problem before I put it back together.
>When playing most records at some stages the tweeter sounds very bright and
>shrill on some frequencies. At first I could not tell if it was cabinet
>vibrations or the tweeter, but I figured out it was definately coming from
>the tweeter.
>
>The amp has been rebuilt, and the cartridge has been changed to a Pickering
>NP/AC (if thats important?). I was going to take it to a speaker re-coning
>place but thought it would be better if I asked here first, in case it 
>could
>
>be something else. Anyone got any ideas??
>
>Thanks,
>Daniel
>
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