PL700 Rebuild

[WOPL Sniffer]

Been away for a while, spouse has been very ill. Anyways, became so frustrated with the mis behaving chassis I secured another later version from member Hexxis. So far ---

Transferred transformer and assorted bits from the old chassis to the new one, drilled and mounted main caps to end plate, installed outputs and brought her up first on a variac then dbt then mains. Sorted out a dead cap on the left driver channel and finally glorious audio. Still have to sort out the wonky meter behavior and perhaps figure out why the bias sets close to 400mv at the lowest trimmer setting but by golly its alive
Initial install before cap replacement (one of the 2.2uf axial caps left channel was open circuit)
View attachment 85203
And playing music this afternoon, need to chase down the meter issue next
View attachment 85204

Next step after that is installing the speaker protection board, then once everything tests out correctly the WOPL driver board.
First time hearing a 700 sing, you are braver souls than I am if you run them up to full rated power in a typical room
Oh, she really likes the PL-4000 preamp.

Lee, you don't remember me warning you about the original 700 back it September (Check your message on AK). Which 4000 do you have (I think I warned you about the "Joystick" Model too.... Have you had to help Phyzo lately?? I ended up selling all my Sansui 5000/A/X boards and parts after the douche bag on ebay copied my boards. I always say, if yer gonna plagiarize, at least CHANGE something.... I did keep a couple boards. I had White Oak Joe help me with some specs and advice when I designed that board. He's forgotten MORE than we'll ever know...... Good luck on your project... Oh, the best way to finance a WOPL Kit is to start stashing cash in Paypal, then the wife won't know any different when you tell her you found a WOPL at the Goodwill.....I'm still trying to figure out how I'm gonna finance a pair of White Oak Model 1's (In Green of course....




Perry

 

[J!m]

Oh, deep hunter green anodize on the front panel with gold accents would look shit-hot.

 

[WOPL Sniffer]

Oh, deep hunter green anodize on the front panel with gold accents would look shit-hot.

Dang Jim, use your imagination.................. Remember this???

 

[J!m]

I remember that, sure.

Just throwing out some classy shizzle.

 

[Hexis22]

Doesn't get more classy than Grammy.

 

[WOPL Sniffer]

Doesn't get more classy than Grammy.

HEYYYYYY, that's Gramps

 

[Overundr1]

Hey there Perry, was wondering where your quiet and thoughtful comments had wandered off to
Yeah, the outright plagarism of hours of board design has me keeping my Kicad work to myself these days along with time spent helping the no thank you latte crowd on that forum that will remain nameless these days. Joe at WOPL along with the other cats here at Phoenix are a whole different group and a community I am grateful to be made a part of. The 700 is almost done, still trying to source a vu meter and sort out a niggle or two, both PL-4000's have been flawless performers since their rebuild.
Think I will wander off to the general tomfoolery department and start another thread that gives my age away.

 

[Overundr1]

Final post on this amp. Extra thanks to Perry, Don, Hexxis and Joe for behind the scenes assistance in correcting operator errors along the way. The PL-700 sounds wonderful with the WOPL control board and WattsAbundant speaker relay. Dead silent at idle and more reserve than I will ever need. Bias at 360mv after warm up, offset was less than 1mv each side. Paired with the PL-4000 makes quite the combo.


Giving the JBL4312's about all they can handle (along with my hearing), what a beast of an amp.

 

[WOPL Sniffer]

Looks like you have a pile of projects on the shelf, quit yappin and get to work.............

 

[Overundr1]

Wish sometimes that they were. All are completed and part of my collection. Think I will put the PL-4000/Pl-700 combo next to the CA-3000/BA-2000 and run them into HPM-100 200w versions so I can do a lengthy side by side comparison.
Actually the next piece in line is a Sherwood S8000 tube receiver with a red plate issue on one of the outputs.
Oh also clean up the bench after that build thrash.
Reminds me I have a sweet Kenwood tuner that will go nicely in the stack.
Curious how large the meter openings are in those faceplates you have as I have those two monster PL meters in the cigar box begging to go into something better as they are too large to fit in the series one faceplate and a 400 faceplate hits the main caps.
Real sucker for the huge vu meter display.

 

[Overundr1]

And placed in rack next to bench. Green meter lighting matches up nicely with the Sansui gear beside it.


The SX-1980 below the CA3000/BA2000 mostly never used anymore, even after a total restoration and new TxTurbo power supply upgrade board. It still has the original MT-200 outputs, and although I have repaired a couple over the years with the work a round the worry of taking out an original output if pushed hard keeps it mainly a hanger queen, although he Sawdust custom bonnet keeps her looking sharp. Point here and the biggest take away from the PL-700 journey is the readily available parts if something goes amiss, same for the BA-2000. I realize that the modern mosfet designs work well and perform admirably, so does a 2025 Chevy 1500 however like my low miles classic bodied '97 I am able to fix anything that breaks and can use it like I stole it
Oh, not shown is a Sansui G-9000 below the SX-1980 that at 185wpc is no slouch either that also is completely repairable if something goes amiss.
Boys and their toys.

 

[J!m]

Teac A3340S

Approved.