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Old 11th August 2006, 12:45 PM   #1
Trout is offline Trout  United States
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Default Now This is A Tube Guitar Amp!!

Tube Tone at its extreme!

1000W Tube Guitar Amp

I Like It
Trout

Edit,

Somehow, I imagine the opening scene of Back To The Future When I See an amp like this!! LOL
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Old 11th August 2006, 01:23 PM   #2
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Heh, I like his 4xEL34 200W amp!
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Trust me, you can get 100 watts from a pair of EL34's (200 watts from a quad) if you run them with 800 volts plate
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Old 11th August 2006, 01:26 PM   #3
Trout is offline Trout  United States
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Heh, I like his 4xEL34 200W amp!

Haha,, I Knew It, My old Seymour Duncan Convertable with a quad of EL34s is not working right, It only puts out 100W,, Unless there is a 1/2 power switch hidden someplace
Trout
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Old 11th August 2006, 04:51 PM   #4
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what i'm most interested in is where he sources those transformer kits, he just builds them for himself, on the fly 0_o. probably not too cheap though.
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Old 11th August 2006, 05:05 PM   #5
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Originally posted by showdown
Heh, I like his 4xEL34 200W amp!

How do you get 100 watts from them? does to operating class change to something crazy?



This Guitar amp looks pretty sweet, I can only imagine what 1kw of tube sound is like
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Old 12th August 2006, 01:36 PM   #6
Trout is offline Trout  United States
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what i'm most interested in is where he sources those transformer kits, he just builds them for himself, on the fly 0_o. probably not too cheap though.
I wrote him a quick note about the transformers and his response is below.

Seems like a good guy.




Hello Gene,
thanks for your enquiry. I re-wind transformers for repairs/customers on a "as needed" basis.

When designing new amplifiers I design and make my own transformers for the same said projects.

I also design and make custom transformers for customers as is required.

So to answer your question, if you mail me the details required for your SE output transformer e.g. plate load, power handling, expected frequency response etc, I'll price it up for you.

However I am a little surprised you can't source an off the shelf one, there are many out there for the 833. Here are a couple of links you might find useful?

http://www.sowter.co.uk/

http://www.vt4c.com/shop/program/main.php

Hope this has all been of help?

Cheers, John.
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Old 12th August 2006, 08:03 PM   #7
wa2ise is offline wa2ise  United States
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Many old AM radio station tube transmitters used "plate modulation" audio modulators. That's essentially an audio amp that varied the B+ supply on the RF transmitter tubes. IIRC, for a 5KW transmiter, the audio amp was 2.5KW. If you can find such a beast, much of the work is done. Though the output transformer won't be matched to drive speakers, but is usually high impedance. But the power supply and amp circuits would be directly usable. It will require special powerline voltages, a 15A 120V outlet won't do it.
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Old 12th August 2006, 10:49 PM   #8
Tweeker is offline Tweeker  United States
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Old 13th August 2006, 12:49 AM   #9
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Though the output transformer won't be matched to drive speakers, but is usually high impedance.
You mean it woukd make a good headphone amp??

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How do you get 100 watts from them? does to operating class change to something crazy?
According to Mullard, if you run 2 EL34s in Class B PP, with 11k plate-to-plate load, 800v on the plates and 400v on the screens, you can get 100w RMS with 5% THD. Probably a high proportion of the THD is 3rd, 5th and 7th harmonics - yuck! This was only intended for PA applications, where distortion is less of an issue than it would be for hi-fi.
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Old 14th August 2006, 07:14 PM   #10
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Originally posted by ray_moth

According to Mullard, if you run 2 EL34s in Class B PP, with 11k plate-to-plate load, 800v on the plates and 400v on the screens, you can get 100w RMS with 5% THD. Probably a high proportion of the THD is 3rd, 5th and 7th harmonics - yuck! This was only intended for PA applications, where distortion is less of an issue than it would be for hi-fi.
I think i'd be happier with 35 Watts Ultralinear class AB
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