Help With 3 Channel Magnavox

FORMD · 13th December 2005, 12:31 PM

I HAVE A 3 CHANNELL MAGNAVOX FROM A 1960'S CONSOLE. IS IT POSSIBLE TO REWIRE IT FOR 2 CHANNELS?

Robert McLean · 13th December 2005, 02:45 PM

This message may show up twice, since my first reply generated some sort of error.

Anyway, the third channel on these consoles is typically a mix of the left and right channels, sometimes with a low pass filter. There are many schematics for these magnavox consoles available, so if you can report a model number I can perhaps give more details.

Maybe I do not fully understand your question, but why rewire it ? If you dont want the center channel then just dont use it. If this feels like you are wasting a perfectly good amp, then the "rewiring" that I would do is to remove the center channel amp and use it for some other project. If it is on a seperate chassis this may be easy to do, otherwise it may not be worth the effort.

kevinkr · 13th December 2005, 05:39 PM

I vaguely recollect at least some of these magnavox three channel amplifiers used the "center" channel amplifier to drive the woofer(s) and the right and left amplifiers to drive mids and tweeters. In such cases the left and right amplifiers generally had smaller output transformers not designed for low frequency operation. The one I recall had a pp amplifier for driving the woofers and a pair of se amps for everything else.

Kevin

Trout · 13th December 2005, 06:04 PM

Quote:

Originally posted by kevinkr
I vaguely recollect at least some of these magnavox three channel amplifiers used the "center" channel amplifier to drive the woofer(s) and the right and left amplifiers to drive mids and tweeters. In such cases the left and right amplifiers generally had smaller output transformers not designed for low frequency operation. The one I recall had a pp amplifier for driving the woofers and a pair of se amps for everything else.

Kevin

Are you sure its magnavox? I have never seen a maggie with 3 channel outputs. I have seen lots of motorola's with that setup.

I have a schematic that covers several of the Motorola's 3 channel setups.

Generally speaking, The OPTs on the left & right channels wont be very useful as they are geared toward mid's and high's. Bass being a center channel with a much larger OPT.

Chassis numbers would be very useful.

kevinkr · 14th December 2005, 04:10 PM

Its been so long since I saw one of these console amplifiers I can't say for sure. I know I have seen motorolas with this set up, but do have a possibly faulty recollection of seeing at least one magnavox that was similar, and your comments about the opt applied in this case also..

Kevin

13th December 2005, 12:31 PM	#1
FORMD diyAudio Member Join Date: Jan 2005 Location: upstate N.Y.	Help With 3 Channel Magnavox I HAVE A 3 CHANNELL MAGNAVOX FROM A 1960'S CONSOLE. IS IT POSSIBLE TO REWIRE IT FOR 2 CHANNELS?

13th December 2005, 02:45 PM	#2
Robert McLean diyAudio Member Join Date: May 2005 Location: Stittsville, Ontario, Canada	This message may show up twice, since my first reply generated some sort of error. Anyway, the third channel on these consoles is typically a mix of the left and right channels, sometimes with a low pass filter. There are many schematics for these magnavox consoles available, so if you can report a model number I can perhaps give more details. Maybe I do not fully understand your question, but why rewire it ? If you dont want the center channel then just dont use it. If this feels like you are wasting a perfectly good amp, then the "rewiring" that I would do is to remove the center channel amp and use it for some other project. If it is on a seperate chassis this may be easy to do, otherwise it may not be worth the effort. __________________ Robert McLean

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
magnavox 185aa with 4-6v6	tim614	Tubes / Valves	3	31st July 2008 12:07 AM
Magnavox 8002 Amp	zino13	Parts	2	29th November 2007 08:59 PM
Magnavox 15" any use?	ThSpeakerDude88	Multi-Way	0	8th November 2006 02:46 AM
Magnavox	jamesjung21	Tubes / Valves	9	21st June 2004 07:34 AM
Magnavox 15wp-p	PassFan	Tubes / Valves	2	20th May 2002 04:19 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read

13th December 2005, 05:39 PM	#3
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	I vaguely recollect at least some of these magnavox three channel amplifiers used the "center" channel amplifier to drive the woofer(s) and the right and left amplifiers to drive mids and tweeters. In such cases the left and right amplifiers generally had smaller output transformers not designed for low frequency operation. The one I recall had a pp amplifier for driving the woofers and a pair of se amps for everything else. Kevin

14th December 2005, 04:10 PM	#5
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	Its been so long since I saw one of these console amplifiers I can't say for sure. I know I have seen motorolas with this set up, but do have a possibly faulty recollection of seeing at least one magnavox that was similar, and your comments about the opt applied in this case also.. Kevin

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)