Thoughts on a McMurdo Silver Masterpiece VI Speaker - Printable Version
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RE: Thoughts on a McMurdo Silver Masterpiece VI Speaker - BrendaAnnD - 05-07-2013
Since the first audio amp and driver circuitry is apparently on the tuner chassis, is it possible that the tweeter plug could be on that chassis?
RE: Thoughts on a McMurdo Silver Masterpiece VI Speaker - Ron Ramirez - 05-07-2013
No, the Super-Giant speaker has a jack on the speaker's pedestal for the optional tweeter.
RE: Thoughts on a McMurdo Silver Masterpiece VI Speaker - BrendaAnnD - 05-07-2013
Ahhh... clever.
RE: Thoughts on a McMurdo Silver Masterpiece VI Speaker - Ron Ramirez - 05-07-2013
I don't know why it isn't documented in the schematic. Maybe not very many MP VI sets had the optional tweeter?
My Clifton cabinet does not have a cutout in the baffle board for the optional tweeter. On the other hand, my Scott Philharmonic's Warrington cabinet does have the holes for the tweeters, but mine never had any - there are no screw holes where tweeters would have been mounted. I know, apples and oranges.
RE: Thoughts on a McMurdo Silver Masterpiece VI Speaker - Mondial - 05-07-2013
Thanks for posting the schematic of the power supply again. It certainly does look like what I have.
I wonder how hard it would be to use it with my Scott Allwave 23 tuner chassis? Have to check the Scott schematic. Unfortunately don't have an original electrodynamic speaker for either the Scott or Mcmurdo.
RE: Thoughts on a McMurdo Silver Masterpiece VI Speaker - y2kbruce - 05-08-2013
I have 3 mp 5 speakers and all have the tweeter plug but I am 75% sure the mp 6 did NOT have the tweeter plug in.
I need to look at my paper work stuff and see if it was offered on the MP 6. John Goller has a complete MP6 set
RE: Thoughts on a McMurdo Silver Masterpiece VI Speaker - Ron Ramirez - 05-08-2013
Ah, perhaps it was the MP V that I was thinking of. (And maybe that's why there is no tweeter socket shown in the MP VI schematic?)
RE: Thoughts on a McMurdo Silver Masterpiece VI Speaker - y2kbruce - 05-26-2013
McMurdo Tweeter UPDATE:
I was lucky to find and buy via a BIN on Ebay for an original tweeter from a Zenith 12A-058 the seller was parting out.
As you may know the Zenith used a 12" pedestal speaker made by Jensen, the same company who made the super jumbo 18" one. Since the MP 5 and the Zenith 12A-58 were basically the same year, I guessed the tweeters used on both were similar or the same as they used identical 4 pin connectors.
The Zenith was rated 5800 ohms but my McMurdo schematics lacked its tweeter rating so I decided to plug it into one of my 18" today and VOILA it works and sounds great.
My biggest problem is the very short cord used on the Zenith tweeter does not reach the front grill since the McMurdo plug is way on the back of the pedestal frame. I will have to figure out an extension cord somehow.
[Image: http://i213.photobucket.com/albums/cc249/y2kbruce/tweeter002_zpse3811854.jpg]
[Image: http://i213.photobucket.com/albums/cc249/y2kbruce/tweeter001_zpsb4a0428e.jpg]
RE: Thoughts on a McMurdo Silver Masterpiece VI Speaker - Doug Houston - 05-29-2013
I have yet another mess on my hands. I have a Scott AW23, which hasn't the tweets in it. I have two pair of the Scott tweets, but the cone is missing in one of them. So, there is a lady in this area who rebuilds speakers. I took the coneless speaker to her, and there doesn't seem to be a cone anywhere that comes close to the right one for replacement. They appear to be made by Jensen.
If push comes to shove, (and it's already about there), I can make a new voice coil for the fool thing. You'd think that, by this time in history, there could have been an infinite number of voice coil sizes used, but that doesn't seem to play out properly.
RE: Thoughts on a McMurdo Silver Masterpiece VI Speaker - TA Forbes - 05-29-2013
Many Scotts came with Jensen tweeters, so it's OK.
RE: Thoughts on a McMurdo Silver Masterpiece VI Speaker - Ron Ramirez - 05-29-2013
Congratulations on your find, Bruce!
Doug - wish I could help, but other than suggest one of the mail order speaker repair shops, I don't know what else to offer...There is a place in Ohio which I have heard does reconing of Scott speakers (Magnavox) and possibly McMurdo (Jensen) as well.
http://www.thespeakershop.com/
RE: Thoughts on a McMurdo Silver Masterpiece VI Speaker - kirwin - 01-11-2014
Is it possible to repair an open coil on the old electro magnetic speakers?
RE: Thoughts on a McMurdo Silver Masterpiece VI Speaker - skyscraper - 01-11-2014
Not likely, unless the break is right under the outer paper cover.
RE: Thoughts on a McMurdo Silver Masterpiece VI Speaker - kirwin - 02-14-2014
I am looking for the schematics for a E.H Scott all wave 15. Can anyone assist me in obtaining this document?
RE: Thoughts on a McMurdo Silver Masterpiece VI Speaker - Ron Ramirez - 02-14-2014
http://ehscott-radio.info/