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 Post subject: There's a new Champ in town...
PostPosted: Wed Mar 14, 2012 6:06 pm 
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in the form of a head amp.

I pulled the iron from my Champlifier and bought all new guts for the insides. I've used a more traditional grounding scheme (pre-amp separate from power amp as discussed here previously), added an additional filter stage to the power supply section (talk about a quiet amp) and housed it all in a 10x6x2 Hammond chassis. Other mods include 0.1uf caps for C2&3 and a 1K/2W screen resistor.

Next on the "to do" list... the cabinet.

Front
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Back
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The obligatory gut shot
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 Post subject: Re: There's a new Champ in town...
PostPosted: Wed Mar 14, 2012 7:25 pm 
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Looks like the best of old and new. Wonderful execution. :mrgreen:


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 Post subject: Re: There's a new Champ in town...
PostPosted: Wed Mar 14, 2012 8:07 pm 
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Looks great.

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i went over abusive...just like i like it :mrgreen:


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 Post subject: Re: There's a new Champ in town...
PostPosted: Wed Mar 14, 2012 8:13 pm 
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Neat as a pin. I would expect no less!

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 Post subject: Re: There's a new Champ in town...
PostPosted: Wed Mar 14, 2012 9:23 pm 
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I see 2 ground lugs (assuming Power side/ Preside) can you give a rundown of which points tie to each ground spot?
-P

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 Post subject: Re: There's a new Champ in town...
PostPosted: Thu Mar 15, 2012 4:22 am 
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The AC jack and two wires from the PT are grounded to one of the screws that hold the AC jack to the enclosure. Lug 1 of the volume pot, the bottom of R4/C1, bottom of C7, bottom of R6 (NOT connected to the bottom of R9/C4) and the input jacks are all grounded to the screw in the front right corner of the first photo. The bottom of the filter caps (C5, C6 and the added 16uf filter cap), bottom of R9/C4, and the output jack are all grounded to the screw in front of the PT. The pre-amp components and power amp components have all their ground connections tied together with two dedicated bus wires beneath the turret board. The wire from the volume pot to the pre-amp tube is shielded with the shield grounded to lug 1 of the volume pot.

I forgot to mention there is a 150R/3W resistor between the first filter cap (C5) and the extra 16uf filter cap that I added.

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 Post subject: Re: There's a new Champ in town...
PostPosted: Thu Mar 15, 2012 6:24 am 
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Just perfect says it all.

Am I blind or where is the fuse? (don't answer that first part :roll: )

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warm places theory sounds plausible. Occasionally, I wake up and think my snake is missing too, but it turns out it's just a chilly morning. :P


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 Post subject: Re: There's a new Champ in town...
PostPosted: Thu Mar 15, 2012 6:41 am 
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Just below where you plug the AC power cord into the jack there is a small drawer that holds the fuse plus a spare.

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 Post subject: Re: There's a new Champ in town...
PostPosted: Thu Mar 15, 2012 6:51 am 
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Hot damn....sneaky :)

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powerpopguy wrote:
warm places theory sounds plausible. Occasionally, I wake up and think my snake is missing too, but it turns out it's just a chilly morning. :P


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 Post subject: Re: There's a new Champ in town...
PostPosted: Thu Mar 15, 2012 8:20 am 
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not sneaky at all, just common sense!

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Yeah, an extra large washer has saved my chunky butt a few times after big chubby tore things up some.


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 Post subject: Re: There's a new Champ in town...
PostPosted: Sat Mar 17, 2012 8:24 am 
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The finished amp. Aint it just the cutest little thang?

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 Post subject: Re: There's a new Champ in town...
PostPosted: Sat Mar 17, 2012 8:33 am 
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Dishwasher FTW, awesome work man!!

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p_wats wrote:
Yeah, an extra large washer has saved my chunky butt a few times after big chubby tore things up some.


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 Post subject: Re: There's a new Champ in town...
PostPosted: Sat Mar 17, 2012 10:35 am 
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Kunfuz wrote:
Dishwasher FTW, awesome work man!!


I believe that is a stove. You can tell from the NOS LED clock. :D

Tidy looking build and nice head cab to boot.

Everyone should get a little head. I know they will enjoy it, and if you can do it yourself you are really special.

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 Post subject: Re: There's a new Champ in town...
PostPosted: Sat Mar 17, 2012 12:36 pm 
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Quote:


Everyone should get a little head. I know they will enjoy it, and if you can do it yourself you are really special.




new sig day :D

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Comfort Player wrote:
Everyone should get a little head. I know they will enjoy it, and if you can do it yourself you are really special.


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 Post subject: Re: There's a new Champ in town...
PostPosted: Sat Mar 17, 2012 5:22 pm 
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Hey. My mom has that same stove!

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Wow, Forrest, you really do have a fine looking set of nuts.

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 Post subject: Re: There's a new Champ in town...
PostPosted: Thu Jun 21, 2012 9:09 pm 
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Stephen wrote:
The finished amp. Aint it just the cutest little thang?

Image



Stephen,

Where'd you get that head cab ?

I have the exact same cab that I put my Firefly into.

I've always wondered if there were others floating around - or were you the one building them ?

Dan

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 Post subject: Re: There's a new Champ in town...
PostPosted: Fri Jun 22, 2012 4:07 am 
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I build all my cabs myself.

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