phase linear parts

chairman said:
mine is type 2 with 0db on left. How do you reach Lee or Perry? I'm new to this site and saw a response from wpol that says they rebuild the back end. My amp is stellar performer, and I am trying to keep it oem.
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If memory serves me, the switches are the same, it just depends on how you connect the 3 wires. One way it bypasses the resistor on the light board, and the other way it channels the signal through the resistor.
 
mlucitt said:
Mine is completely missing... If'n you have an extra one kickin' around, layin' in your parts bin. or holding up a leg on your couch.
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I didn't hear back from either of you about the attenuation switches so I offered them up.... They are no longer available.
 
Rats, I was offline for a week and now no more attenuation switches...
I thought message #13 was good enough to place a switch on hold, I guess I need to be a bit more forceful next time.
 
You did have a hold on the switch. I waited a week to hear back from you and didn't. As for the new guy...... never mind.

My settings for my account here allow me to be emailed if somebody wants to get ahold of me..... How's about yours???
 
My early 700b has the -20 db setting on the left. My later 700 WOPL from Glen has the newer style faceplate with -20 db on the right.

In either case the -20 db position requires closed contacts to short out/bypass the 22k resistor which then results in higher meter current at a given output level. Otherwise, open contacts for the 0db position.

Because of this labeling difference the early faceplate requires an On/Off contact arrangement vs the later faceplate which requires an Off/On contact arrangement which was/is probably more common. Both switches are double pole single throw.

I hope this helps resolve questions about the meter switch functional difference!
 
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