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Walter Woods Amps History and Development

#481
blueoctave said:
Greetings all ... so I've been trying to get Walter this week but all I get is a ringing line never going to an answering machine. Anyone have any recent luck with Walter? My mid-80's Woods could use some love.
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Thanks for everyone's input, I did hear back from Walter about a week and a half after I left him a message. He did his homework and knew my amp etc. I had my 15mins with Walter and he was concise, thusly figured out what needed to be done for my beloved ww. He sounded in good health and reminded me that his time is "at a premium" so, the legacy lives on.
 
#483
Before I call the master with mundane queries that would only slow down his output, 2 questions:

1. What's up with the tiny toggle switch hidden in the gap between the fifth and sixth cooling fins from the right (looking from the back) on Electracoustic and MM400-8 amps? I hate to toggle it to find out that this maybe a self-destruct switch for those too curious to leave things alone! My switch is in the down position, by the way.

2. On MM400-8 and similar: how do I achieve stereo when toggled that way? Do the two outputs split in that position between upper and lower pre-amp sections? And, in the 'mono' setting, what does that achieve?
I'd like to know where I can find an operating instruction for MM XXX-8 amps, to better understand what the various toggle switches and jacks do.

Thanks in advance!
JM
 
#484
juniormarbles said:
Before I call the master with mundane queries that would only slow down his output, 2 questions:

1. What's up with the tiny toggle switch hidden in the gap between the fifth and sixth cooling fins from the right (looking from the back) on Electracoustic and MM400-8 amps? I hate to toggle it to find out that this maybe a self-destruct switch for those too curious to leave things alone! My switch is in the down position, by the way./
i believe this is the switch to access different voltages (euro or u.s.)

probably best to leave it where
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#485
Thanks. I think you are right on question No.1. I googled around and found similar oblique hints that this is indeed the 110/220VAC switch, with down being 110.

Leaves question No. 2. and I found this in old posts here:

"If your amp has a standard black top, then the Mon/Stereo switch simply divides the pre amp so that it's running stereo. You have to connect a power amp to Channel 2 at the Line Out.

The "MON STR" switch allows the input channels to be summed together for mono or used independently for stereo operation. You will need a separate power amp for stereo however, since your amp only has one mono power amp. At one time Walter sold a slave amp for this type of use."

I think that explains it well. Unless it's incorrect.

The little (-) O (+) toggle switches next to bass and treble controls seem to predetermine a set amount of eq emphasis- very little, normal or a lot. The tone knobs then sweep within that pre-set range (?)

I added a picture (not my actual amp, but my layout).
 

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#494
From the WW Owner's Manual:

9. (APPLIES ONLY TO HI POWER STEREO AMP) BRG\STR (BRIDGE/STEREO) SWITCH: To bridge speaker(s) between the two power amps, set this switch to BRG and connect speaker via the special "bridging" adapter cord. IMPORTANT: EXCEPT FOR BRIDGING, THIS SWITCH MUST BE KEPT IN THE STR (STEREO) POSITION; OTHERWISE, SPEAKERS CONNECTED TO POWER AMPS A AND B WILL BE OUT OF PHASE. Also set both PAN POTS at 1:1. PRECAUTION: In order to prevent shock hazard and/or high current discharge when operating in BRIDGE MODE it is ABSOLUTELY necessary to use speaker plugs, including "Y" cords, with PLASTIC or MOLDED CAPS ONLY. DO NOT USE METAL CAPPED PLUGS OR CONNECTORS. Also, do not connect or disconnect speakers or TOUCH CONNECTORS while amplifier is in use or switched on.
 
#496
Mark Sacchetti said:
Thanks for the info ! I intend to use this

http://www.musiciansfriend.com/accessories/monster-cable-stereo-female-2-male-1-4-y-adapter

Do you think this is ok?
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No! Do not use anything like that. It will not work and will damage your amp.

If you don't understand the basic principle of operation with a bridged stereo amp, you may want to have a qualified tech make a Y cord as described above. This would be a lot cheaper than having your amp repaired. You may be able to get a Y cord from Walter also.
 

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