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That is correct. The handles were made in England for Bud Industries. I've made a few attempts and internet searches over the years to try and find out who made them but with no luck. I'll bet somewhere in England there are perhaps some homes with some of these exact same "drawer pulls" on...

Lee, I started a new thread on the Phase Linear 700B rack handle history: https://forums.phxaudiotape.com/threads/phase-linear-700b-rack-handle-history.8726/ Ed

Lee has inspired me to write some musings on the Phase Linear 700B Rack Handle history: The Phase Linear 700B rack handles were originally obtained from Bud Industries as part number H-9152 and were listed in Phase Linear master parts list as part number 121-0026-0. It appears that they were...

When you get some time, reading some of the documents above should be helpful as it will show you how much noise voltage and noise current there is for various types of resistors. I have not yet had a chance to populate the same model pc boards, one with one type (i.e. carbon composition) and...

When you get a chance, in order to gain a better understanding of the purpose of an emitter resistor, perform a search on the internet for "emitter degeneration". Ed

Unfortunately, Dean and I didn't keep any data on the carbon composition resistors that were going up in value (greater than +10% of nominal). If my memory serves me correct, it was the lower value resistors under 1K ohm we had issues with. In some cases the values doubled. It's just better to...

Different Kinds Of Meters Give Different Readings According To The Waveform This was obtained from Norman Crowhurst's book Basic Audio Volume 2

The attached document was obtained from Norman Crowhursts book Basic Audio Volume 2

I haven't been able to find a complete 8903A manual yet. I am guessing that it might be similar to the 8903B. If my memory serves me correct, the 8903B was also the foundation for the Audio Precision test systems early on. Here are a few sentences taken throughout the 8903B manual...

Several years ago, I watched an interview with Justice Scalia and Ginsberg. In this interview Scalia talked about "originalism". "Originalism is a concept regarding the interpretation of the Constitution that asserts that all statements in the constitution must be interpreted based on the...

Ron, I am not sure where you can post a copy of the manual. I am looking for an original first generation Phase Linear 400 series 1 owner's manual and sales brochure with the Edmonds address on it. I have photocopies but they aren't so good. hifiengine and the carversite have copies of the...

If the Phase Linear 700 series 2 amp has LF351's I.C.'s in it, check the (2) large 7.5K ohm dropping resistors mounted on Malco pins on the side of the pc board. If they are Rockwood brand, they should be replaced automatically with at least 5 watt 7.5K ohm resistors. The TRW brand PW5's were...

Here are some links to documents concerning the different types of resistors and resistor noise. Basics of Linear Fixed Resistors Vishay Application Note Document Number 28771, Revision 11-Nov-08 Resistors by R.A. Fairs Wireless World Oct 1975 pgs 487-492 Build the J-Can To Measure Resistor...

Jerry, I have long recognized that the specs on metal film resistors are better than carbon film or carbon composition resistors. In order to compare Phase Linear amplifiers with different pc boards in them, I didn't want to stray too far afield from what components Phase Linear would have...

I would suggest also replacing all of the "carbon composition" resistors (which go up in value with age) on the PL0171 pc board with at least "carbon film" resistors. Or you may want to take it one step further by replacing them with metal film resistors. https://www.percyaudio.com/Catalog.pdf...

https://www.facebook.com/photo.php?fbid=262343478044698&set=pcb.2752567141635740&type=3&theater

Jerry, Is the result noted above for single channel driven or both channels driven? I would expect to see (2) THD figures that are not exactly the same. THD spec for a 400 series 1 amp is .25%. A 400 series 2 is .09%. So if you were using the same pc board in a series 2 amp it would not...

Jerry, How did the amp test out at 20kHz, both channels driven (at the same time) to rated output for T.H.D.? 700B: (i.e. 52.5V @ 8 ohms for 345 watts) or 700 series II (53.66V @ 8 ohms for 360 watts) Ed

I can't recall specifically looking at the power cord on your amp. However, if it looks anything like the one in the photos below, then yes the power cord should be replaced with a 15A (16AWG) non-polarized power cord. The 10A power cords may in all likelihood be on other WOPL amps out there...

I made some edits to post #125 on this thread.