1W Wallace amp

A place to discuss Wallace amps.

Re: 1W Wallace amp

Postby David B » Sat Mar 24, 2012 11:22 am

Haha look at that thing, stick it next to a 139 :twisted:

can't wait to see the completed amp
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Re: 1W Wallace amp

Postby neikeel » Sat Mar 24, 2012 12:19 pm

You are a bad man Mr Wallace - I might have to get one of these wee beasties :roll:
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Re: 1W Wallace amp

Postby Brian Wallace » Sat Mar 24, 2012 1:07 pm

David,

I'll snap a shot later, should be funny.

Neil,

This OT is specific to a 12au7, I can sell them but they will be about as much as a choke.
Remember....You can fix it with a little extra energy and a positive attitude. ;)
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Re: 1W Wallace amp

Postby probelus » Fri Mar 30, 2012 8:16 am

Brian,

Let me know If you ever need a combo version or a matching cab for the 1W Wallace amp. I can provide cool 2.5'' Mil.Spec. Russian speakers :lol: .
I can even kill my gecko to get a natural "snakeskin tolex" for the first prototype :twisted: :lol:

Cheers!
Kirill
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Re: 1W Wallace amp

Postby Brian Wallace » Fri Mar 30, 2012 9:30 am

Hey Kirill,

What does that cost? :)
Remember....You can fix it with a little extra energy and a positive attitude. ;)
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Re: 1W Wallace amp

Postby probelus » Mon Apr 02, 2012 10:00 am

Considering it's a voice module from Russian OTIS elevator... hm... about $3 for one speaker :lol:
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Re: 1W Wallace amp

Postby neikeel » Wed Apr 04, 2012 1:31 pm

I have been casting around for a low output amp to play smaller gigs with (even my 18watter seems to be too loud now :evil: ) but I am not sure the 1w will do the trick (unless through a 4x12 with 100dB speakers).
I have been looking at these http://guitaramplifierpcbs.com/PlexiSE.aspx which are modded Epi valve juniors but the concept of a 5watt single ended single input, TMB with volume and MV is very appealing.

Image
Image
Image

I guess a schematic would help and then make a layout for a turretboard with chassis mounted valves and transformers. Looks like BNP have the front and rear plates. Brian seems to have contacts for making a chassis, wonder how the quality of the transformers affects sound on one of these...................just thinking aloud :wink:
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Re: 1W Wallace amp

Postby Brian Wallace » Wed Apr 04, 2012 9:00 pm

I came across this amp while doing research for the 1W. I am working on getting circuit boards made for some of my amps and could do something like this. The chassis and panels are easy as well.
Remember....You can fix it with a little extra energy and a positive attitude. ;)
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Re: 1W Wallace amp

Postby neikeel » Thu Apr 05, 2012 7:09 am

Thanks for the schematic 8) .

Very, very similar to stock split cathode plexi even down to a cathode follower tone stack and the 6V6 is cathode biased, looks a complete doddle to me, could build one from my spares box tonight apart from the transformers, seems a shame to gut an epiphone valve jr just for the trannies. I would want to make a head that I could plug into one of my cabs, like a small version of a plexi.

Wonder if anyone else would be interested?

I think the photos you see abouve would be the ideal basis. Could probably be set up for any octal output tube?

Brian do you have any advice?
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Re: 1W Wallace amp

Postby Brian Wallace » Thu Apr 05, 2012 9:15 am

Neil,

A single ended octal set up can be done but I'm not sure the valve junior transformers will work, I don't know the specs on them.
Remember....You can fix it with a little extra energy and a positive attitude. ;)
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