YMI5150? 12003 build

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YMI5150?
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YMI5150? 12003 build

Post by YMI5150? » Fri Jun 22, 2012 4:03 pm

Eric's clips are motivating me to get its replacement online as quickly as I can crank it out. Nice to have a couple builds under the belt. it makes things a lot more efficient. making the necessary chassis mods up front is key. drilling for the different trannies and larry grounding without anything in it is nice.

Specs:

CM 2562 Laydown PT
Toneclone 2" Drake 2.2k VZ OT (thanks again to the late, great Ben Wise for specing that out and making it available to us)
Toneclone 3.8H choke

Identical V1 cathodes (I latter swapped out V1a with a mustard) 820/.68, to clear up the normal channel and allow me to be able to jump channels with effects blended in if desired.
RCA Fat bottles
Biased to variac to 92 VAC

the last shot is about 15 intense hours in. a few loose ends to tie up and the filter board install is about all that's left. its very similar to the 12002 build I did for Brian but has a few more Iskras and Pihers, as well as NOS radial filters that required a different turret layout. thanks to Robert (Valvestorm) and Brian for working that out.

A new job and upcoming vacation are sort of in the way of a test run soon but I hope to have it wired, cap forming, and tested before next week. all the caps came formed from Valvestorm but I have a dual 20 that came from Good Guest that I want to put in the preamp filter spot for some nice mojo.


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Last edited by YMI5150? on Sun Feb 03, 2013 11:30 pm, edited 3 times in total.

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efraser68
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Re: YMI5150? 12003 build

Post by efraser68 » Fri Jun 22, 2012 4:59 pm

She's a beauty Kevin, glad I can motivate you to finish it up. Maybe next year when Phil's healed up a bit he can come out to CA and we treat him to play the bevy of amps :vh:
Remember Ben Wise (aka Stunt Double) & Mark Abrahamian
http://www.soundclick.com/EricFraser" onclick="window.open(this.href);return false;

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Re: YMI5150? 12003 build

Post by vanhalen5150 » Fri Jun 22, 2012 5:53 pm

Looks neato! Couple of box caps eh?
12000 Metro Kit

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Re: YMI5150? 12003 build

Post by TWANGGG » Fri Jun 22, 2012 9:13 pm

Nice work, again, Kevin!
vanhalen5150 wrote:Looks neato! Couple of box caps eh?
Hmmm...yep, looks like some StuntDouble approved stuff going on in there, yes? Been thinking about giving that a try in mine too.

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Re: YMI5150? 12003 build

Post by axeman » Sat Jun 23, 2012 11:13 pm

I don't like your amp, it's missing some mustards and a correct 250/350uf cap. Give me your address so I can send you some.

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Re: YMI5150? 12003 build

Post by YMI5150? » Sun Jun 24, 2012 12:13 am

Appreciate the honesty :)

I have the "right parts". That's intentional.

Cheers

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Re: YMI5150? 12003 build

Post by axeman » Sun Jun 24, 2012 1:54 am

That's cool, let me know if you change your mind. Your green leads are to long. BTW don't ever post pictures with out posting sound clips. Just a simple rule. :)

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Re: YMI5150? 12003 build

Post by Strat78 » Sun Jun 24, 2012 7:32 am

Nice, your really cruising along with this build. Brian should have alternative boards for the laydown cans for sure, or we can start building our own boards! :wink: What tranny's are going in here? For me, it's a great feeling when you get the hang of this stuff and start laying things out with confidence and flare. The board looks great, the heaters and socket wiring looks clean and not self conscious. Of course the 470 and odd 68k resistors are driving me absolutely batty :x :lol:

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Re: YMI5150? 12003 build

Post by YMI5150? » Sun Jun 24, 2012 10:54 am

Thx strat. Have any iskras to fill in those last couple spots for me?

I did the identical v1 cathodes on the build Eric has because the normal channel is so muddy that I'd never use it. This way I can jump in effects up front and blend to taste. I did that with a blue 6 band and got damn close to first album tone.

Trannies are same as the build I did for Brian: CM 2562 using lower taps, merc 2.2k 2" OT, 3.8H choke. Nothing we haven't tried yet but a proven stellar configuration. I have some killer old 12ax7s and rgorke helped me complete my quad of Sylvania fat bottles.

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Re: YMI5150? 12003 build

Post by rgorke » Tue Jun 26, 2012 9:57 am

Yeah, that odd 68k looks out of place. I checked my stock and I don't have one. There is a guy on eBay that has a good supply of the 68k 1/2 watt that look nice .....oh and sound good too.

I have put the chicklet and Mylar dipped caps in and have never looked back. Those were fantastic finds and suggestions. Hey add grit and clarity while the mustards are warm and smooth.
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Re: YMI5150? 12003 build

Post by Strat78 » Tue Jun 26, 2012 12:28 pm

Whazzgroover has the 1w 68k that would fill that spot. He also has the 470 and 820 too.

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Re: YMI5150? 12003 build

Post by rgorke » Fri Jul 06, 2012 9:32 am

WHERE ARE THE CLIPS? You have got to be back by now.
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Re: YMI5150? 12003 build

Post by YMI5150? » Fri Jul 06, 2012 9:51 am

Fly back today, pack the house this weekend, movers come Monday. Trying not to think about it...

Was on the beach for the wicked storm Saturday. Did you east coast builders lose power?

Clips are a couple weeks out. Need to get settled. Planning on having ender and efraser over later this month. Might record some stuff. We'll have this new build, my first build that Eric now has, and Enders metro Friedman on tap that day. Rock on!

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Re: YMI5150? 12003 build

Post by rgorke » Sun Jul 08, 2012 10:02 am

YMI5150? wrote:Fly back today, pack the house this weekend, movers come Monday. Trying not to think about it...

Was on the beach for the wicked storm Saturday. Did you east coast builders lose power?

Clips are a couple weeks out. Need to get settled. Planning on having ender and efraser over later this month. Might record some stuff. We'll have this new build, my first build that Eric now has, and Enders metro Friedman on tap that day. Rock on!
I was in LA when the storm hit. We lost power for only about an hour. But then the AC went out. A 90 yr old woman was killed when she was hit by a tree sleeping in bed just around the corner.

Can't wait to hear tone summit 3.0.
"If you make a mistake, do it twice and smile and let people think you meant it." Jan Van Halen.

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Re: YMI5150? 12003 build

Post by YMI5150? » Mon Jul 16, 2012 10:04 pm

had a few minutes to power up and take measurements. the bias voltage on pin 5 is -120 and does not change with the pot.

attached is the data. obviously no power tubes in yet.
initial power up measurements 16Jul12.jpg
initial power up measurements 16Jul12.jpg (29.36 KiB) Viewed 3145 times
Thanks!

edited to correct pin 9 data.

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