Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: kagliostro on July 24, 2014, 06:45:12 pm
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This amp was build by my friend Hey Jude with some my idea (and your help :wink: )
The two input triodes have each one their Tone Control (different from each other)
the idea of two different tone controls was found on the web
(http://cdn-2-service.phanfare.com/images/external/4823592_2133860_30163724_Web_3/0_0_f2bdc212b99dd665c89d90395a441e97_1)
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There is a single input jack and is possible to switch between a channel to the other acting on a footswitch
(my friend didn't implemented the option to have both input joined, only swapped)
One other mod to the 5E3 standard circuit was to add a parallel FXLoop circuit (from Engl Fireball) that can be bypassed via footswitch
He preferred to use a trimmer in front of the FXLoop and didn't use it also as overdrive
PAY ATTENTION THE ELECTROLYTIC CAP ON THE CATODE OF V3a IS CONNECTED BACKWARD
(Revised schematic on Reply #15)
(http://i.imgur.com/0iIIW2o.jpg)
Also the cabinet of the amp and speaker were build by my friend, but in this part of the project I have not contributed
(http://www.diyitalia.eu/forum/download/file.php?id=9799&mode=view)
K
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That is a VERY cool amp! I like it. THANKS for sharing the schematic and photos. :thumbsup:
With respect, Tubenit
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Thanks Jeff
Franco
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That is a VERY cool amp! I like it. THANKS for sharing the schematic and photos. :thumbsup:
Me too K,
It reminds me of what I've got on the breadboard right now....
I basically took the 5E3's preamp and added T's effects loop and it sounds great to me :thumbsup:
I've just been sitting around playing through it for the last couple nights trying to figure out where to go next....?
I also like the look of the blue and black tolex mix.
You are a good friend!
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Thanks SILVERGUN
Franco
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K what would you say the difference is between the 2 channels with the different tone caps. sound wise . I like the blue and black also.
Bill
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My fried recorded some samples of the amp (they are as they are, but you can have an idea about the amp)
http://www.mediafire.com/download/44jb8vyriimu5pi/15+WATT+SAMPLE.rar (http://www.mediafire.com/download/44jb8vyriimu5pi/15+WATT+SAMPLE.rar)
K
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hi my friend K :icon_biggrin:
hello guys, I'm Hey jude and i finished this amps,with the help of K and friends of diy Italia. :smiley:
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Hey Jude,
You have picked a great friend with Kagliostro. He has contributed a tremendous amount on this forum and is a very valued community
member here.
VERY nice amp you have built! Bravo. What an impressive design and look.
Welcome to EL34 forum!
With respect, Tubenit
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You have picked a great friend with Kagliostro. He has contributed a tremendous amount on this forum and is a very valued community
member here.
Yes!
VERY nice amp you have built! Bravo. What an impressive design and look.
Welcome to EL34 forum!
Yes and Yes!!
Brad :icon_biggrin:
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I would love to hear the recordings, but I don't want to download the RAR file unzipping program. It seems every time we download a program off the web, a lot of unwanted software gets loaded on our computer.
Any suggestions?
Thank you
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Download Winrar from rarsoft, and just keep an eye on the install for those already checked boxes. It will install a demo copy without any garbage.
Jim
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WinZip can open *.rar files too. Just in case you already have it.
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Shes a Beauty and I bet a Beast. The circuit design looks so Friendly to build
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Very nice! The blue on black looks great.
:icon_biggrin:
Peace
-Aaron
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I'm sorry
I just realized that the electrolytic capacitor on V3a, on the previous schematic, is connected in a wrong way (- to catode of V3a)
here a revised version of the schematic
(http://i.imgur.com/lx0Onyg.jpg)
Sorry
Franco