I'm Buying a "Mule" PL400

[mlucitt]

Hey everyone, I need a chassis to hold newly assembled WOA upgrade control boards. So, I am bidding on this PL400:
https://www.ebay.com/itm/PHASE-LINE...1588a16be:g:tysAAOSwFdZct5l3&autorefresh=true

Please don't bid against me, as I cannot afford much more than this for a PL400. (as if this will really stop you guys...) And I hope the transformer is good at least!

Anyway, I have one of the new Rev E control boards on the way, and I need a bench mule to test it. My last board assembly was a Rev A, so take that!

I will document unboxing, upgrading, testing, etc.

Thanks,
Mark

 

[Gepetto]

Great to see you back on the site Mark. Post liberally...

 

[laatsch55]

He has been ....that's uber cool!!

 

[mlucitt]

Yup, I only need 54,719 more posts to equal what Lee has done for this site (humble bow).

 

[laatsch55]

My "Amen" count is tremendous....

 

[Gepetto]

Amen to that...

 

[laatsch55]

The forum hasa been missing Dr. Lucitt's vibe for a looooooong time...good to see ya back Mark....

 

[mlucitt]

I gotta tell ya, I felt a little queasy tonight, putting 10 Ohm resistors in places marked D4L/D4R...

 

[Gepetto]

There is a cure for that queasy feeling Mark. Go full comp

 

[WOPL Sniffer]

Yeah.... DO IT!!!!

 

[mlucitt]

My next one will be fully complementary. I grew up on push-pull amplifiers, most all the guitar amplifiers in my days were P-P.
I like the architecture of the backplane boards but it does add some complexity to the transistor wall. Is the PL700 backplane kit just an enlarged version of the PL400 backplane kit? I'm wondering if I should try a PL400 backplane first, or jump right in with both feet and build the PL700B backplane amplifier???

 

[WOPL Sniffer]

WOPL your 700B..... It's THE SHIT MAN

After I did one (one dozen), I never looked back.

 

[grapplesaw]

Cost wise they are close to the same so big go 700

 

[grapplesaw]

I am slowing becoming a B convert.

 

[WOPL Sniffer]

They be pretty. I got one coming in for a build next week.

 

[Bradrock]

I am slowing becoming a B convert.

Is that a White Oak Faceplate?

 

[laatsch55]

My next one will be fully complementary. I grew up on push-pull amplifiers, most all the guitar amplifiers in my days were P-P.
I like the architecture of the backplane boards but it does add some complexity to the transistor wall. Is the PL700 backplane kit just an enlarged version of the PL400 backplane kit? I'm wondering if I should try a PL400 backplane first, or jump right in with both feet and build the PL700B backplane amplifier???

I think it reduces the complexity of the backwall. And very little point to point. Yep the 700 backplane is just a big brother of the 400...

 

[grapplesaw]

Is that a White Oak Faceplate?

Yes this is a whiteoak plate. I traded with Perry for it

 

[mlucitt]

I think it reduces the complexity of the backwall. And very little point to point. Yep the 700 backplane is just a big brother of the 400...

I see what you mean. But I am old school and I think the point to point wiring is authentic and beautiful, when properly dressed. Of course, I have to install a new backplane to get caught up to you guys. Does anyone think this is an audible difference after installing just the new backplane? Has anyone done that or has the new backplane always been part of a Full Comp upgrade?

 

[laatsch55]

Back planes are only full comp Mark. And they do drop residual noise...builds can now approach 200 micro volts on a 700 and under 180 on a 400...