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Old 05-14-2013, 11:23 PM   #1
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Phaez V2-cutter

Hey All,

A while ago I built a 10-watt Daisycutter from Randy's excellent kit. It started to evolve a bit with a few tweaks here and there, until I reached a point where I wanted to rebuild it. The new amp sounds like the original DC10 (as far as I can remember; I must compare to blues.juniors DC10 in the future) but sports a totally custom eyelet board that I designed and built. Since I can't claim that it is a Daisycutter at this point, I am going to refer to it as the V2-cutter.

I must go back to do some testing and tweaking, but so far I am very happy with the outcome.

Here is the new board in the beginning:
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Old 05-14-2013, 11:26 PM   #2
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Re: Phaez V2-cutter

And here is the board after drilling and pounding in some eyelets.

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Old 05-15-2013, 01:55 AM   #3
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Re: Phaez V2-cutter

Nice one.

What did you change about the DC? I know you did a triode switch and power scaling, did you redesign the circuit too?
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Old 05-15-2013, 07:43 AM   #4
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Re: Phaez V2-cutter

Looks great. What did you use for board material?

There's something fun and gratifying about building eyelet boards.
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Old 05-15-2013, 10:05 AM   #5
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Re: Phaez V2-cutter

Quote:
Originally Posted by matmont1305 View Post
Nice one.

What did you change about the DC? I know you did a triode switch and power scaling, did you redesign the circuit too?
So far I kept it pretty 'stock' actually. The pentode-triode switch is still there, and so the power supply has been modded to accommodate that. I took out the Fender-style standby switch, but I still might add an alternative standby or front-panel mute toggle. The existing standby switch position has been used as a signal-ground lift.


Quote:
Originally Posted by Soul Tramp View Post
Looks great. What did you use for board material?

There's something fun and gratifying about building eyelet boards.
Yes, it was fun to design and build. But now I have a problem: I cannot use stock stuff anymore...

This board is 1/16" glass epoxy. I have thicker material as well, but I wanted to use the thinner stuff on my first build. And other than being brown, it worked out very well.
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Old 05-15-2013, 10:10 AM   #6
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Re: Phaez V2-cutter

A few parts fitted into the eyelet board. The yellow caps were from the original DC10.



And a few more:



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Old 05-15-2013, 10:13 AM   #7
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Re: Phaez V2-cutter

Just a tip.... Keep the resistors elevated so they don't touch the board. This helps with heat dissipation which reduces hiss.
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Old 05-15-2013, 10:21 AM   #8
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Re: Phaez V2-cutter

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Just a tip.... Keep the resistors elevated so they don't touch the board. This helps with heat dissipation which reduces hiss.
Thanks Don. The power resistors are elevated. The others are not, but most of those are 2-watt metal film.
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Old 05-15-2013, 06:13 PM   #9
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Re: Phaez V2-cutter

Here's the new board dropped into the DC10 chassis

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Old 05-15-2013, 07:17 PM   #10
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Re: Phaez V2-cutter

That look like a Watts' chassis. Is Randy now using a high quality chassis or did you provide the blank.
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Old 05-15-2013, 08:24 PM   #11
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Re: Phaez V2-cutter

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That look like a Watts' chassis. Is Randy now using a high quality chassis or did you provide the blank.
The DC10 kit came with this chassis. I think Randy uses smaller chassis for the most part now, and I'd actually like to use a larger one. So I'll purchase them from Watts in the future.
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Old 05-16-2013, 10:10 AM   #12
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Re: Phaez V2-cutter

Here it is wired up for initial testing. All grounds lead to what used to be a standby switch. The pentode-triode switch on the left was set on pentode at this point because I still needed to add some filtering up front.

Something essential was missing, however. Can anyone spot it?

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Old 05-17-2013, 04:19 PM   #13
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Re: Phaez V2-cutter

Quote:
Originally Posted by V2 View Post
Here it is wired up for initial testing. All grounds lead to what used to be a standby switch. The pentode-triode switch on the left was set on pentode at this point because I still needed to add some filtering up front.

Something essential was missing, however. Can anyone spot it?


A cover?

I'll quit bein' a smart ass. I have no idea, but do tell!
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Old 05-17-2013, 07:47 PM   #14
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Re: Phaez V2-cutter

Quote:
Originally Posted by indigochild View Post
A cover?

I'll quit bein' a smart ass. I have no idea, but do tell!
I forgot to install a grid leak resistor for the output tube. Lucky I caught that one before I fried something
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Old 05-17-2013, 11:02 PM   #15
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Re: Phaez V2-cutter

A couple of updates on the V2cutter:

- I added some extra filtering in the power supply. In the photo below, the extra filtering is done by a capacitance multiplier mounted to the back panel. There are two immediate benefits: (1) no more single-end hum. Gone. I've also elevated the heater AC by 80 Vdc, so the heater hum is all but gone too. This amp is quiet as hell. (2) With a much cleaner DC power supply, I'm able to switch to triode mode for a very noticeable drop in volume, a tighter bass, and a darker overall tone. I had the MV up to noon and the gain up to 10 o'clock and it's not loud in triode.



I also tweaked the circuit for a fantastic blackface tone. Gain at 10 o'clock, MV at noon, TMB all at noon. Strat style guitar with single coils. Great, powerful cleans. I must make this setting available on the front panel. It's like having a Corona and a Daisycutter in a single channel!
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Last edited by V2; 05-18-2013 at 09:29 AM.
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Old 05-17-2013, 11:11 PM   #16
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Re: Phaez V2-cutter

That's awesome V2. I want to hear what that sounds like. I wish I had a triode switch on my JTM 10w. Mine is not that loud with gain and volume at noon. I mean loud but not overbearing. It would be nice to have triode to crank it a bit higher even and achieve a darker tone as well. Nice work! A corona and DC, that's pretty versatile.
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Old 05-17-2013, 11:20 PM   #17
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Re: Phaez V2-cutter

Thanks. I think it will be very versatile once I add a front panel toggle.

Many people will point out that triode mode reduces volume by 'only' 3dB. I'll point out that a 3-dB cut corresponds to cutting the signal in half. It is VERY noticeable.

Having said that, I still don't believe it is only 3B less. I must bring home my dB meter to test...

I'll also make some sound clips after I have settled on a final design. My inability to record a good clip is on par with my lack-luster playing, so be prepared. Maybe I should fly out Rosco?
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Last edited by V2; 05-18-2013 at 09:30 AM.
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Old 05-18-2013, 10:10 AM   #18
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Re: Phaez V2-cutter

Quote:
Originally Posted by V2 View Post
Thanks. I think it will be very versatile once I add a front panel toggle.

Many people will point out that triode mode reduces volume by 'only' 3dB. I'll point out that a 3-dB cut corresponds to cutting the signal in half. It is VERY noticeable.

Having said that, I still don't believe it is only 3B less. I must bring home my dB meter to test...

I'll also make some sound clips after I have settled on a final design. My disability to record a good clip is on par with my lack-luster playing, so be prepared. Maybe I should fly out Rosco?
Whatever happened to:

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Old 05-18-2013, 10:26 AM   #19
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Re: Phaez V2-cutter

The Denogginizer is still here - I haven't been able to part with it!
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Old 05-19-2013, 09:57 AM   #20
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Re: Phaez V2-cutter

Thanks for sharing the story of the progression.

I'm looking forward to hearing clips!

I love my JTM18+. I don't have any more amp GAS ever since getting it, but I would like to try another 'flavor'. A 'Fender-based' Phaez will probably be next.
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Old 06-01-2013, 08:08 PM   #21
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Re: Phaez V2-cutter

No recordings yet, but the amp is basically done now. Time to burn in and perhaps do minor tweaks to taste. Will be ready to go out the door by early next week...



+



=

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Old 06-01-2013, 10:29 PM   #22
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Re: Phaez V2-cutter

Heads up!
http://www.mylespaul.com/forums/memb...isycutter.html
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Old 06-12-2013, 02:17 PM   #23
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Re: Phaez V2-cutter

I put these build photos into a video:

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Old 06-12-2013, 08:42 PM   #24
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Re: Phaez V2-cutter

Sounds fantastic man.
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Old 06-12-2013, 09:27 PM   #25
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Re: Phaez V2-cutter

Thanks Matt. I appreciate your positive feedback!

I tightened up the bass a bit after these clips were taken. I'll make some more clips in the next week.
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Old 06-12-2013, 09:52 PM   #26
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Re: Phaez V2-cutter

It's an awesome amp to begin with, all this time you've spent tweaking it must have it sounding superb.

It'd be cool to hear it side by side with a stock DC10.
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Old 06-12-2013, 09:55 PM   #27
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Re: Phaez V2-cutter

V2 is a great guy with tons of amp building knowledge...buy with confidence.
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Old 06-12-2013, 10:55 PM   #28
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Re: Phaez V2-cutter

Quote:
Originally Posted by matmont1305 View Post
It's an awesome amp to begin with, all this time you've spent tweaking it must have it sounding superb.

It'd be cool to hear it side by side with a stock DC10.
Yes, I need to get together with Blues.Junior soon.

Lots of the tweaking is for my own education. In most cases I have tweaked and then restored to stock values. And often I just tack in Rs or Cs in parallel to change values. It's easy to do with alligator clips. But there are several changes that I kept because I liked the result.

Currently, I've tacked in some stuff to increase gain. I had a tonne of fun playing it in higher-gain mode today. Very wet and ballsy.
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Old 06-12-2013, 11:06 PM   #29
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Re: Phaez V2-cutter

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V2 is a great guy with tons of amp building knowledge...buy with confidence.
Thanks M. I'm pretty much obsessed with building now. There is no turning back....

If someone were to buy this particular V2cutter and not dig it, I'd take it back to mod it or just give a full refund. Of course, I'd try to get it right before shipping it off in the first place

And I'm glad that you are enjoying your Metro amp. I've have a plan for a low-power 'plexi' in the future that I'd love to compare with the real thing. Since you have the Phaez and the Metro, perhaps I should send you a prototype for testing in the future...
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Old 06-13-2013, 03:57 AM   #30
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Re: Phaez V2-cutter

Many congratulations on your build V2.

I echo sentiments already expressed - super helpful and knowledgeable fellow. Glws!
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