9444B - alternate procedures for BIAS, LF, Current Limit?

[_88]

The 9444B Service Manual calls for an oscilloscope, tone generator and distortion analyzer, unlike the 9444A which can be serviced with a multimeter. Basically, the fundamental stripped waveform from the distortion analyzer is sent to the scope and... analyzed. Are there alternate procedures for these adjustments? I have software oscope, tone generator and spectrum analyzer, the only thing I'm lacking is a distortion analyzer with output. My options:

1. Purchase a distortion analyzer - I was outbid on a HP 331A today.

2. Build one - http://sound.westhost.com/project52. htm

3. Call Ira - does he post here? If he doesn't, I'm hesitant to ask him for free advice.

4. Ask the smart people here for advice - Help!

[mah]

This freeware might do the job: Low-Cost Audio Testing Techniques Using a PC | Suite101 .

A User Manual and the software can be downloaded from: http://audio.rightmark.org/download.shtml

[_88]

Thanks mah, I RTFM and played with Rightmark, as far as I can tell it does not have the capability to output fundamental nulled distortion signals in realtime.

I was hoping that someone would know of a simpler method of making said adjustments, possibly with a multimeter. For example, the 9444A service manual shows no less than 5 methods of adjusting bias-the simplest is done powered off and only requires a screw driver!

[Audio_by_Goodwill]

.....For example, the 9444A service manual shows no less than 5 methods of adjusting bias-the simplest is done powered off and only requires a screw driver!

Where did you get a 9444A service manual?

[_88]

^ I found it online, it's missing a few pages, but it shows DC offset and the 5 ways to adjust bias I tried to attach it, but at over 2mb, it's too large Suggest me a hassle free way to upload it.

[Altec Best]

I tried to attach it, but at over 2mb, it's too large Suggest me a hassle free way to upload it.

How about email ? I can send you my email through PM's and I'll upload it.. How many pages is it ?

[Altec Best]

FWIW Most service folk's are eager to help.Whether they can help you for free with advice (If you do the Work) or if you have to send it in to them for a fee..

If you can't find what you need I wouldn't hesitate to call Ira.He may have one of these simple solutions for you.

[_88]

FWIW Most service folk's are eager to help.Whether they can help you for free with advice (If you do the Work) or if you have to send it in to them for a fee..

If you can't find what you need I wouldn't hesitate to call Ira.He may have one of these simple solutions for you.

Thanks. I'll call Ira for free advice as a last resort.