RE: [TCML] LBO-514A

["S&JY" <youngs@xxxxxxxxx>]

Greg,

Following up on the below, see this site:  http://bama.sbc.edu/leader.htm
they have manuals for Leader oscopes you can download.  There aren't any for
the 514A, but you could look at manuals for similar Leader scopes.  

--Steve Y.

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of piranha
Sent: Wednesday, June 25, 2008 8:18 PM
To: Tesla Coil Mailing List
Subject: Re: [TCML] LBO-514A

Hi Greg,

Be careful what you wish for!!

After seeing Leader's manuals, you will wish you hadn't :D

Although the 514A is hard to find, it's close brothers are not:

http://hot-streamer.com/temp2/leader/

There where only like 10 scope designs back then. Like auto models 
years, they only changed the color and trim. Hopefully the insides are 
pretty much the same as yours and you can figure out the manuals if you 
wish. You might be better off just doing it by ear ;)

You can also call Leader:

https://www.leaderusa.com/web/login.php

I think they are free or a small photocopying cost.

Terry


G Hunter wrote:
> All,
>
> I'm seeking calibration info, or at least basic alignment info, for a
LEADER LBO-514A oscilloscope.
>
> Seeking a "coiling" oscope, I bought said unit from ebay for a song.  To
my surprise, the scope arrived in very good condition--no rust, no dents, no
cracked or missing knobs, no burned spots on CRT, plus a bright, sharp
trace.  It's so cheap, I consider it "disposable", and I won't cry too much
if life in close proximity to a Tesla coil kills it.
>
> My only complaint is the lack of calibration.  Triggering & amplitude are
fine.  The problem is nonlinearity in the horizontal axis.  Timing looks
good on the left side of the display, but the test waveform bunches closer
together on the right side of the display--as if the scope's sweep waveform
itself is curved.  Weak sweep amp, perhaps?
>
> I've scoured the WWW for cal info and found nothing.  With little to
loose, I took the thing to work where I have access to trustworthy Tektronix
oscopes and tech school-quality function generators.  With the cover off, I
examined the various adjustment pots and found two likely prospects labeled
"length" and "width" respectively.  I tweaked the "width" pot and got
instant improvement.  I tried it with 1kHz, 10kHz, and 100kHz square waves,
and eventually arrived at a reasonable compromise.
>
> The thing is probably adequate for hobby-type coiling as-is.  However,
it's in such nice condition inside & out, I'd really like to give it a
proper alignment.  Can anyone help?  Got a link for me or a PDF you can
email me?  If so, kindly contact me off-list.
>
> Many Thanks,
>
> Gregory R. Hunter
>
>
>       
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>
>
>   

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