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SyncTronX SyncTronX is offline

diyAudio Member


    Number of Photos: 324
    Number of Comments: 12
    Number of times photos viewed: 1,033,100
    Disk space used: 51.5MB
    Last Photo Uploaded: FFT_No_Filter.jpg

    Last Comment Posted: 01-04-01-advanced
    Check my spelling....

About Me

  • About SyncTronX
    Too many projects, so little time.
    Cubs Win! 108 Years - anguish no more.
    Music, Amplifiers, Good Sound,
    United States
  • Signature
    -- Sync


Total Posts
  • Wiki Contributions: 20
  • Wiki Comments: 15
  • Recent Wiki Activity:

    SyncTronX edited the page LM741 21st December 2016

General Information
  • Last Activity: Today 08:09 AM
  • Join Date: 9th October 2008


Showing Friends 1 to 10 of 13


View SyncTronX's BlogRecent Entries
Latest Blog Entry

Posted 1st February 2017 at 08:59 AM by SyncTronX Comments 0
Posted in Uncategorized
Over in the Low-distrotion, Audio-range,
Oscillator thread (LINK) some posts
about getting lower distortion before taking
the measurement of a DUT (Device Under Test).

Our own RNMarsh posted some good results
running his Panasonic through a miniDSP
box configured as a Low Pass Filter.

He had good results. So I thought and told him
so, and suggested he might get better results doing a band pass filter.

So instead of doing my diode homework for
my Solid State Devices class, I thought I'd
better check, that is put up for shut up.

So, I did and here is what I discovered:

Before filtering:

Posted 27th December 2016 at 04:12 AM by SyncTronX Comments 0
Posted in How To
How to set up the spell checker.


Spell check is NOT in the DIYAudio software,
it is part of your browser.

Set up is simple. Follow these
general steps:

On the menu bar select and hold tools:

Then, drag down and selection Options:

Then from the tool options scroll down and select Advanced:

Then at the bottom click on the check box, to
put a check in it:

Close the window, restart your browser, that is it.

Posted 29th November 2016 at 01:42 AM by SyncTronX Comments 9
Posted in Uncategorized


The HP339a was a state of the art (SOTA) distortion analyzer in the 1980s.
It is a full featured all-in-one product including a volt meter,
low-distortion oscillator, distortion analyzer, AM detector, and VU meter.

There was an in-depth analysis of low distortion oscillators
on DIYAudio on the following link:

<Low-disortion Audio-range Oscillator>
This was followed by a specific HP339a thread, linked here:


This is a summary of those threads along with the links, conversations, and
posts, about the research and development that went into the suggested modifications to the venerable HP 339A.


Why HP 339A?

HP339A Post #78
Well, a stock 339A gives you a wide band ac voltmeter, an oscillator and analyzer. A stock one will do you pretty well as long as you have no interest in reading below...

Posted 18th December 2014 at 05:38 AM by SyncTronX Comments 0
Posted in How To
For those of use that use the QA400 FFT,
here are some tips that will help us use the
product and software for measurement.

Press the Ctrl key plus an Axis, Windowing, or Measurement soft switch parameter.

For example, PRESS Ctrl + .dBV brings up a
dialog box to set External Gain & Peak Display Format:

Ctrl + .dBr brings up the following:

Ctrl + .X Lin:

Ctrl + .X Log:

The Measurements soft switch parameters as follows:

Ctrl + .Pwr:


Posted 30th July 2014 at 07:00 AM by SyncTronX Comments 0
Posted in How To
There are some simple keyboard short cuts
that have been around for a while and work.

You may already know them some of us might
not. They were originally used in the Apple
Computer interface and have been held over
on the windows computer too.

After you select an item by clicking it
or clicking and dragging, then do
one of the following: Undo, Cut, Copy, Paste.

The actions are performed with the keyboard keys,
the lower left side and above the space bar.

The keys are Z X C V .

Use one of these keys with the Ctrl key.

Ctrl + C Copy
Ctrl + V Paste
Ctrl + X Delete
Ctrl + Z Undo

The Ctrl key is located in the lower left corner
of the keyboard.

Use the rolling press to make this work.

First press Ctrl with the little finger, left hand,
hold it down,
then press C key with middle finger,...
Recent Comments
thanks for this!
Posted 5th January 2017 at 09:50 AM by tschrama tschrama is offline
Just to let everyone...
Posted 27th December 2016 at 03:50 PM by SyncTronX SyncTronX is offline
Hi Miklos,
Posted 7th December 2016 at 05:41 AM by SyncTronX SyncTronX is offline
Thanks for summing it...
Posted 6th December 2016 at 08:25 AM by miklos miklos is offline
Thanks for dropping...
Posted 5th December 2016 at 11:58 PM by SyncTronX SyncTronX is offline
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