ebay Phase Linear 700B rescue

[laatsch55]

True dat....

 

[derek92994]

They be not growing on anything else either....

LMAO!!

 

[derek92994]

I want to glue the needle of my left meter back on

 

[derek92994]

It fell off during the last big WOPL session

 

[Fishoz]

WHAT FELL OFF?????????!!!!

 

[Fishoz]

Didn't read far enough....just the needle...whew!

Had me worried for a minute. Could have been a undesirable WOPL side effect.

 

[derek92994]

WHAT FELL OFF?????????!!!!

Didn't read far enough....just the needle...whew!

Had me worried for a minute. Could have been a undesirable WOPL side effect.

Yeah too much meter pegging

Optional WOPL extra make body parts fall off?

 

[derek92994]

I think the ship hit a pot hole in the sea, dislodged it a bit

 

[Billboard]

How do you handle the meter calibration when you go to a complete Whiteoak conversion? With the meter at 0 you are at 350 watts right? so do you re-calibrate so 0 is 450 watts?

The soles brave enough to crank the WOPL to the limit are you just burying the needle to the limit?

I am just guessing, maybe the red is when the amp starts to distort normally?

just asking

 

[Northwinds]

In the red I get no distortion and I FLATTEN the meters, that's when your into the headroom. Never heard one of these distort

http://vidmg.photobucket.com/albums/v514/maxwedge426/DSCF7335_zpskrsscsda.mp4

 

[laatsch55]

0db on a stock 700 is only 265 watts into 8 IIRC. Joe can give you resistor values to make it read whatever you want....

 

[Billboard]

Wow that is some needle bending in the video, looks like R50 or R54 needs to be increased by a few 1,000 ohms.

 

[Billboard]

Thanks, I checked my order, I did order 100k pots. these look good 1/4 inch solid shaft, 3/8 mounting shaft.

http://www.amazon.com/gp/product/B003WUMXLY?psc=1&redirect=true&ref_=oh_aui_detailpage_o00_s00

The POTs arrived today, they are crap, don't want to put them in my amp. They just feel so cheap.

Does anyone have a link to a good quality POT for the 700B volume control (100K ohms) 1/4 solid shaft, for a 3/8 mounting hole?

 

[62vauxhall]

Maybe here?

http://www.electronicsurplus.com/catalogsearch/result/?cat=103&q=100k

 

[NavLinear]

Does anyone have a link to good quality POT?

Probably Ron - maybe Lee.

 

[Northwinds]

^^^^^^ LMAO!!!!!

 

[Billboard]

I bought two 100K input potentiometers from ebay and installed them, put the amp together and it looks pretty good.



The bad, it sounds like crap, there is not enough gain in both channels (the needles barley come off of the bottom when the receiver is all the way up) and it is not as loud as a 350 watt amp should be, not as loud as the PL400. Also the right channel is distorted.

I am using a Pioneer SX950 pre-amp out jacks and (4 ohm impedance) Ohm I speakers. This setup sound fine using my PL400 amp.

I will bring the amp back to the bench, but not really sure what to check.

 

[laatsch55]

Got a signal generator?

 

[laatsch55]

It takes 1.75 volts input for 350 watts output....

 

[Billboard]

Got a signal generator?

I need to search for some test equipment, I have a couple of scopes and may have a signal generator. I will drag them out and see if they work.