Hoffman chassis 6V6 project

Fender Amp Discussion

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xtian
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Re: Hoffman chassis 6V6 project

Post by xtian » Wed Jul 12, 2017 4:36 pm

M Fowler wrote:
Wed Jul 12, 2017 4:23 pm
now have printing option instead of milling the panels.
What printing process?
I build and repair tube amps. http://amps.monkeymatic.com

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M Fowler
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Re: Hoffman chassis 6V6 project

Post by M Fowler » Wed Jul 12, 2017 4:44 pm

http://www.frontpanelexpress.com/

Not sure but it looks good to me.

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xtian
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Re: Hoffman chassis 6V6 project

Post by xtian » Wed Jul 12, 2017 4:45 pm

OK, I answered my own question by looking at their web site, thanks Mark. I see some price examples also. What did yours cost, if you don't mind?
I build and repair tube amps. http://amps.monkeymatic.com

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M Fowler
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Re: Hoffman chassis 6V6 project

Post by M Fowler » Wed Jul 12, 2017 4:53 pm

$59.01 front panel and $50.57 back panel. Cost increased because I infilled the milled lettering with black paint.

I think UV printing is cheaper.

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M Fowler
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Re: Hoffman chassis 6V6 project

Post by M Fowler » Wed Jul 12, 2017 11:01 pm

Work continues and figuring out as I go.
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telentubes
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Re: Hoffman chassis 6V6 project

Post by telentubes » Thu Jul 13, 2017 1:42 am

Always a pleasure to see your latest Mark. Thanks for crankin' em out.

10thTx
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Re: Hoffman chassis 6V6 project

Post by 10thTx » Fri Jul 14, 2017 9:53 am

Mark,

Thanks for sharing! You do beautiful work.

With respect, 10thtx

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M Fowler
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Re: Hoffman chassis 6V6 project

Post by M Fowler » Fri Jul 14, 2017 1:56 pm

Thank you guys I appreciate the comments. Doug Hoffman's little chassis are very cool. I want to built another one with EL84's.

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V2
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Re: Hoffman chassis 6V6 project

Post by V2 » Sun Jul 16, 2017 4:45 pm

Are you going to do anything special to ventilate the tubes. I'm kinda surprised the tubes were placed up front rather than along the rear edge of the chassis.

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M Fowler
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Re: Hoffman chassis 6V6 project

Post by M Fowler » Mon Jul 17, 2017 1:34 am

V2 wrote:
Sun Jul 16, 2017 4:45 pm
Are you going to do anything special to ventilate the tubes. I'm kinda surprised the tubes were placed up front rather than along the rear edge of the chassis.
There is no problem with the tubes being up front, 1,000's of amps have been running with this design. I prefer your layout myself with tubes on the back of the chassis.

Just look at all the Little Walter 22w, 50w, and 80w guitar heads out there with the octal tubes up front.

Mark

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M Fowler
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Re: Hoffman chassis 6V6 project

Post by M Fowler » Thu Aug 24, 2017 9:55 pm

Finally I got this amp wired up, fired up and ready to do some playing.

I thought one of my Mikey head cabs would fit this but no I didn't pay enough attention to detail so will have to build a cab.

Mark
IMG_1064.JPG
IMG_1065.JPG
Plates: 358vdc Screens: 367vdc bias -26vdc

B+
1. 370vdc
2. 366vdc
3.322vdc
4.322vdc

V1
1. 97vdc
3. 3.4vdc
6. 98vdc

V2
1. 244vdc
6. 215vdc
2. 41.54vdc
7. 39.73vdc
3-8. 67.2vdc
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BarryW
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Re: Hoffman chassis 6V6 project

Post by BarryW » Mon Sep 25, 2017 7:31 pm

Nice! Thanks for sharing Mark, I always enjoy your builds. Great idea !

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M Fowler
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Re: Hoffman chassis 6V6 project

Post by M Fowler » Tue Sep 26, 2017 3:27 am

Thank you.

I adjusted the dropping string and sold it to a jazz player, he loved it and is not putting it in a cabinet he is mounting on wood.

Mark

stephenl
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Re: Hoffman chassis 6V6 project

Post by stephenl » Tue Sep 26, 2017 11:29 am

Hey Mark,

How does the printed version compare with milled from FPE?
Steve

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Re: Hoffman chassis 6V6 project

Post by stephenl » Tue Sep 26, 2017 11:33 am

I like the "tubes up front" design. It can make for a really short run from the input jack to V1A. If you design openings or perforated metal front valence you can vent tubes and show them off for aesthtics.
Steve

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