Strathearn(?) Ribbons and Tranformers

D Brummitt · 11th March 2006, 05:45 PM

Have 4 Ribbon units (and transformers) that I acquired from (I believe) a Speaker Builder ad probably 20 years ago. My understanding was that they are Strathearns although there are no manufacturers marks anywhere on them. They look more or less professionally made.

All four function (with the transformers) although one seems to have a frame-to-diapgragm buzz which I assume can be adjusted or damped out. They are made with an extremely thin mylar diaphragm bonded to aluminum ... or vice versa. No where is there evidence of tearing.

How they "sound" is anybody's guess. I have never used them. Bench tested with their "backs" down(with a boom box without a high pass filter) they played quite loud and extend lower than I would have anticipated.

Will send pics on request.

I would like to get $200 for the four units and transformers plus shipping.

Would be willing to trade (in part) for 12 - 10mfd polypropylene audio grade capacitors (for Apogee Calipers)and/or a defunct ... or not ... linaeum driver (Radio shack or otherwise)... for dissection purposes.

Dan Brummitt
dbrummitt@sosinet.net

Cal Weldon · 11th March 2006, 05:56 PM

Do you have some pics?

D Brummitt · 17th March 2006, 10:49 AM

For unknown reasons I can't attach jpeg (60kb) files to this site ...

Using a mac sys 10.4 with Safari ...

If you will email me I will send you pics.

Thanks for your interest ..

Dan B

Cal Weldon · 17th March 2006, 01:32 PM

Hi Dan,

Not sure why you can't post. Are you using the choose file option at the bottom of the page? The file you sent me was all the pics stacked together in one tall skinny photo that registered 122K. Can you post then individually?

11th March 2006, 05:45 PM	#1
D Brummitt diyAudio Member Join Date: Dec 2005 Location: central Ca	Strathearn(?) Ribbons and Tranformers Have 4 Ribbon units (and transformers) that I acquired from (I believe) a Speaker Builder ad probably 20 years ago. My understanding was that they are Strathearns although there are no manufacturers marks anywhere on them. They look more or less professionally made. All four function (with the transformers) although one seems to have a frame-to-diapgragm buzz which I assume can be adjusted or damped out. They are made with an extremely thin mylar diaphragm bonded to aluminum ... or vice versa. No where is there evidence of tearing. How they "sound" is anybody's guess. I have never used them. Bench tested with their "backs" down(with a boom box without a high pass filter) they played quite loud and extend lower than I would have anticipated. Will send pics on request. I would like to get $200 for the four units and transformers plus shipping. Would be willing to trade (in part) for 12 - 10mfd polypropylene audio grade capacitors (for Apogee Calipers)and/or a defunct ... or not ... linaeum driver (Radio shack or otherwise)... for dissection purposes. Dan Brummitt dbrummitt@sosinet.net

11th March 2006, 05:56 PM	#2
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	Do you have some pics? __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

17th March 2006, 10:49 AM	#3
D Brummitt diyAudio Member Join Date: Dec 2005 Location: central Ca	Strathearn pics For unknown reasons I can't attach jpeg (60kb) files to this site ... Using a mac sys 10.4 with Safari ... If you will email me I will send you pics. Thanks for your interest .. Dan B

17th March 2006, 01:32 PM	#4
Cal Weldon Speakerholic diyAudio Moderator Join Date: Jan 2004 Location: British Columbia	Hi Dan, Not sure why you can't post. Are you using the choose file option at the bottom of the page? The file you sent me was all the pics stacked together in one tall skinny photo that registered 122K. Can you post then individually? __________________ Next stop: Margaritaville Some of Cal's stuff \| Cal Weldon Consulting

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