Ampifier Testing

laatsch55 · Oct 21, 2017

Ok folks, we are going to come up with some standard testing and procedures for the WOPL's. ED and I have been talking about it for awhile, so how about your input?

NavLinear · Oct 21, 2017

That's a great idea guys. Something along the lines of testing individual components such as the bipolar junction transistors to frequency response. I'm liking this.

laatsch55 · Oct 21, 2017

Ed, being the metrologist that he is has some ideas...

laatsch55 · Oct 21, 2017

NavLinear said:

Mainly testing the performance specs, but the transistor testing ain't a bad idea....

K-5BLAZER · Oct 22, 2017

I got an idea in addition to the original 74 ftc rule(s) why not take a page from car audio amp and deck/seting amp gain testing turn it up till it clips and slowly lower it till it is clean
example cliping @ 60 volts clean @ 59 volts then test at various frequencys and ohm loads

also a SMD AD-1 amp dyno would be cool

VSAT88 · Oct 22, 2017

laatsch55 said:

Send each one individually to my house and I will test them for you. No problem. Sorry, could not help myself.

laatsch55 · Oct 22, 2017

rtp_burnsville · Oct 22, 2017

I have an interest in following this conversation.....

Robert

Netfly · Oct 22, 2017

laatsch55 said:

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Connect to point A, read B.

laatsch55 · Oct 22, 2017

And that fine sir is what Ed excels at. He wrote a lot of calibration procedures for Boeing and NIST....

wattsabundant · Oct 29, 2017

I do what the P/L manual says. I'm not as concerned with distortion, S/N as I am with load sharing, offset, and short circuit testing. I also check ripple voltage on the DC caps at 8 ohms/clipping.

Anybody thats afraid to do the short circuit test probably took short cuts along the way.

oldphaser · Oct 30, 2017

laatsch55 said:

Lee,

Unfortunately I never worked for N.I.S.T. I do have a number of friends who do work there. By the way, N.I.S.T. doesn't write full blown calibration procedures per say. They do have standard operating procedures, good laboratory practices, good measurement practices, etc.

Ed

oldphaser · Oct 30, 2017

Define: Phase Linear 700, 700B, 700 II and PRO 700 Specifications and Tolerances

Lee,

Before we can proceed with a calibration procedure we as a community need to define any additional specifications and tolerances we might want to include.

Most of what you will see in my rough draft (of specifications and tolerances) was taken from Phase Linear's manufacturer's specifications: 700, 700B, 700 II and PRO 700 owner's manuals, services manuals and sales brochures. In some cases there is a discrepancy in the specifications.

Additionally, I added a few more things we may want to consider (i.e. channel separation/crosstalk, etc).

So I began a checklist on the first (2) pages (see attached document) which will eventually correlate to steps in the calibration procedure. Once someone is familiar with all of the steps you can just jump to the checklist in the back of the procedure. NOTE: The Navy NAVAIR calibration procedures often have a checklist in the back of them. Using the checklist and recording the data will also be helpful in evaluating differences between PC boards, etc.

Ed

grapplesaw · Oct 30, 2017

oldphaser said:

Lee,

Before we can proceed with a calibration procedure we as a community need to define any additional specifications and tolerances we might want to include.

Most of what you will see in my rough draft (of specifications and tolerances) was taken from Phase Linear's manufacturer's specifications: 700, 700B, 700 II and PRO 700 owner's manuals, services manuals and sales brochures. In some cases there is a discrepancy in the specifications.

Additionally, I added a few more things we may want to consider (i.e. channel separation/crosstalk, etc).

So I began a checklist on the first (2) pages (see attached document) which will eventually correlate to steps in the calibration procedure. Once someone is familiar with all of the steps you can just jump to the checklist in the back of the procedure. NOTE: The Navy NAVAIR calibration procedures often have a checklist in the back of them. Using the checklist and recording the data will also be helpful in evaluating differences between PC boards, etc.

Ed

Good work Ed. I am excited to see your procedure write up

wattsabundant · Oct 31, 2017

I think before we go to far we need to define the scope of work. It appears to me we need two documents. One covers the basics that a user with limited means could accomplish. The second can be unlimited in its scope.

Ampifier Testing

laatsch55

Administrator,

NavLinear

Veteran and General Yakker

laatsch55

Administrator,

laatsch55

Administrator,

K-5BLAZER

Journeyman

VSAT88

Veteran and General Yakker

laatsch55

Administrator,

rtp_burnsville

Chief Journeyman

Netfly

Journeyman

laatsch55

Administrator,

wattsabundant

Chief Journeyman

oldphaser

Chief Journeyman

oldphaser

Chief Journeyman

Attachments

grapplesaw

Veteran and General Yakker

wattsabundant

Chief Journeyman