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 Kriesler 11-81 screems on bass
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 Return to top of page · Post #: 1 · Written at 7:00:39 PM on 23 April 2013.
planet x's Gravatar
 planet x
 Location: Brisbane, QLD
 Member since 30 November 2008
 Member #: 389
 Postcount: 16

Hi Guys
As above, I have an 11-81 that I have re capped, checked resistors & replaced all that were faulty. Now, the set works fine with typical 11-81 sensitivity & volume
when tone is on treble, but as its turned to bass(which is just after on) it gives out a deafening scream even with the volume turned down. Advise greatly appreciated.
Cheers, Rob.
 
 Return to top of page · Post #: 2 · Written at 7:42:56 PM on 23 April 2013.
Airzone's Gravatar
 Airzone
 Location: Maclean, NSW
 Member since 30 May 2008
 Member #: 291
 Postcount: 341

Rob, do you have a circuit, if not contact me via my profile and I will send you one.
Peter
 
 Return to top of page · Post #: 3 · Written at 8:18:48 PM on 23 April 2013.
planet x's Gravatar
 planet x
 Location: Brisbane, QLD
 Member since 30 November 2008
 Member #: 389
 Postcount: 16

Hi Peter, yes I do thanks.
 
 Return to top of page · Post #: 4 · Written at 10:11:18 PM on 23 April 2013.
Marcc's avatar
 Marcc
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 5389

Apart from a misswire of that cap. (no circuit)

If the set has feedback introduced from the speaker transformer secondary, make sure that you have not inverted the primary wires of the OP transformer as that will reverse the phase and it will likely oscillate.

Philips 132L is one of many that will do that, should you get it wrong.

Marc
 
 Return to top of page · Post #: 5 · Written at 10:46:11 PM on 23 April 2013.
planet x's Gravatar
 planet x
 Location: Brisbane, QLD
 Member since 30 November 2008
 Member #: 389
 Postcount: 16

Thanks Marc.
 
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