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Hoffman Amps Forum image Author Topic: 2 "channel" 5E3 + FXLoop  (Read 6855 times)

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Offline kagliostro

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2 "channel" 5E3 + FXLoop
« on: July 24, 2014, 06:45:12 pm »
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



---

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)




Also the cabinet of the amp and speaker were build by my friend, but in this part of the project I have not contributed



K
« Last Edit: February 10, 2020, 01:14:04 pm by kagliostro »
The world is a nice place if there is health and there are friends

Offline tubenit

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Re: 2 "channel" 5E3 + FXLoop
« Reply #1 on: July 25, 2014, 04:37:47 am »
That is a VERY cool amp!   I like it.   THANKS for sharing the schematic and photos.  :thumbsup:

With respect, Tubenit

Offline kagliostro

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Re: 2 "channel" 5E3 + FXLoop
« Reply #2 on: July 25, 2014, 02:03:23 pm »
Thanks Jeff

Franco
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Offline SILVERGUN

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Re: 2 "channel" 5E3 + FXLoop
« Reply #3 on: July 25, 2014, 02:19:59 pm »
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!

Offline kagliostro

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Re: 2 "channel" 5E3 + FXLoop
« Reply #4 on: July 25, 2014, 02:42:24 pm »
Thanks SILVERGUN

Franco
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Offline Tone Junkie

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Re: 2 "channel" 5E3 + FXLoop
« Reply #5 on: July 26, 2014, 12:38:33 am »
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

Offline kagliostro

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Re: 2 "channel" 5E3 + FXLoop
« Reply #6 on: July 26, 2014, 07:39:53 am »
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


K

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Offline Hey Jude

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Re: 2 "channel" 5E3 + FXLoop
« Reply #7 on: July 28, 2014, 03:51:52 pm »
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:

Offline tubenit

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Re: 2 "channel" 5E3 + FXLoop
« Reply #8 on: July 28, 2014, 05:15:49 pm »
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

Offline Willabe

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Re: 2 "channel" 5E3 + FXLoop
« Reply #9 on: July 28, 2014, 05:26:51 pm »
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:

Offline pullshocks

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Re: 2 "channel" 5E3 + FXLoop
« Reply #10 on: July 28, 2014, 09:04:29 pm »
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

Offline AZJimC

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Re: 2 "channel" 5E3 + FXLoop
« Reply #11 on: July 29, 2014, 02:38:09 am »
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

Offline sluckey

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Re: 2 "channel" 5E3 + FXLoop
« Reply #12 on: July 29, 2014, 06:12:01 am »
WinZip can open *.rar files too. Just in case you already have it.
A schematic, layout, and hi-rez pics are very useful for troubleshooting your amp. Don't wait to be asked. JUST DO IT!

Offline lego4040

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Re: 2 "channel" 5E3 + FXLoop
« Reply #13 on: July 29, 2014, 06:59:56 am »
Shes a Beauty and I bet a Beast. The circuit design looks so Friendly to build

Offline TeslaRect5150

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Re: 2 "channel" 5E3 + FXLoop
« Reply #14 on: July 29, 2014, 09:44:33 am »
 Very nice! The blue on black looks great.
  :icon_biggrin:
Peace
-Aaron

Offline kagliostro

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Re: 2 "channel" 5E3 + FXLoop
« Reply #15 on: March 01, 2016, 06:26:54 am »
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



Sorry

Franco
« Last Edit: February 10, 2020, 01:14:31 pm by kagliostro »
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