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The Hundred-Buck Amp Challenge
The Hundred-Buck Amp Challenge
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Old 23rd May 2012, 02:17 PM   #1491
thoglette is offline thoglette  Australia
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Quote:
Originally Posted by tubelab.com View Post
Two "experts" told me that pine guitar was a stupid idea, but the posts here have convinced me that they were like many audiophiles. They never tried it themselves, so it was a dumb idea.
I've a jarrah guitar - another wood that "doesn't work". Lovely sound. (horrible wood for fine woodworking, but sounds fine)

Last edited by thoglette; 23rd May 2012 at 02:19 PM. Reason: spelling
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Old 30th May 2012, 04:40 AM   #1492
Printer2 is offline Printer2  Canada
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Time for another schematic. Someone was asking for a Fender Harvard kit, another poster suggested a 5E3 kit and use the extra volume control as a master and plug the other input, the Harvard has three and the 5E3 Deluxe has four. I did my take on it if I was modifying a 5E3 kit.

I sort of winged the fixed bias supply so that might need some looking at, but the actual point is the Blackface tone control option. Using a three pole two way toggle switch, or a for pole if you use the alternative second stage cathode, you can have a standard Harvard Tweed sound with the regular Tween tone control, or in the BF position you would have Volume, Treble, and Bass, oh yeah, the treble pot is a dual 1M. I adjusted the capacitor value for the change in the treble control value in the tone stack. Skipping the fixed bias the regular 270 ohm and 22uF cathode bias circuit would work also, have it in my amp that I lent out but it is slow in coming back. Think I might do the cathode bias output version for my nephew.

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Last edited by Printer2; 30th May 2012 at 04:44 AM.
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Old 30th May 2012, 05:19 PM   #1493
hushpuppy is offline hushpuppy  United States
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Location: western pa
any of you builders happen to live in western pennsylvania
plz ?
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Old 2nd June 2012, 04:43 PM   #1494
Printer2 is offline Printer2  Canada
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Well the above Harvard takeoff got me thinking since I used a couple of dual pots to get the BF treble and bass controls on the Tween tone control. Long story short, I went to dual pots on all the controls and with a four pole and a three pole toggle switch I think you can have a 5E3 Deluxe, a 5F10 Harvard, and a sort of Blackface amp that is either milder with the Harvard power amp (fixed bias output with negative feedback and no cathode bypass in the voltage gain stage) or a little wilder with the Deluxe power amp (cathode biased output, no NFB, voltage gain stage cathode bypassed).

Will it be practical? Only time will tell I guess. I worked out the tone controls for the pot values, bias may need a little work.


5E3 with Harvard and BF options

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Old 3rd June 2012, 06:47 PM   #1495
Printer2 is offline Printer2  Canada
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And now for something a little simpler, picked up a old radio. Thinking of building a head out of it.

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Old 4th June 2012, 10:31 AM   #1496
djgibson51 is offline djgibson51  New Zealand
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Cool
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Old 5th June 2012, 07:11 AM   #1497
jazbo8 is offline jazbo8
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The Hundred-Buck Amp Challenge
Yup, old radios make great chassis for small heads. I did my AX84 SEL in one.

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More about it here.

End of shameless self-promotion...

Jaz

Last edited by jazbo8; 5th June 2012 at 07:15 AM.
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Old 5th June 2012, 03:20 PM   #1498
Cassiel is offline Cassiel  Libya
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Nice, Jaz. I also have an old radio, maybe someday...
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Old 6th June 2012, 03:15 AM   #1499
jazbo8 is offline jazbo8
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Quote:
Originally Posted by Cassiel View Post
Nice, Jaz. I also have an old radio, maybe someday...
Gracias! Since I don't know how to make real guitar cabinets, that's about the quickest and probably least expensive way (at least for me) to get a decent looking finished amp.

Jaz
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Old 16th June 2012, 08:58 AM   #1500
ArcticBreaze is offline ArcticBreaze  New Zealand
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Talking Fender 5E3

Why did fender put sooo many input sockets on the 5E3 Delux how many guitars can ya play at once and its been my experiance that guitarists dont share. lol gona have to build a whole new chassis for mine one day just to get rid of the empty holes.
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