MOTM

Please do not take the previous post to imply a scope is *REQUIRED* for
building the VCO. It's not.

However, I'm simply stating that you will not be able to 100% verify the
outputs without looking!

Paul S.


-----Original Message-----
From: Thomas Hudson <thudson@...>
To: motm@onelist.com <motm@onelist.com>
Date: Wednesday, February 03, 1999 9:12 AM
Subject: [motm] Re: Oscilloscopes


>From: Thomas Hudson <thudson@...>
>
>
>Here's a couple of addresses of interest for those looking for
>a tek scope:
>
>http://www.goodnet.com/~brogers/scopes.htm
>http://www.aactrinity.com/tektroni.htm
>
>Tomy
>
>
>Paul Schreiber wrote:
>>
>> From: "Paul Schreiber" <synth1@...>
>>
>> Since the VCO kit really requires a scope to really check it out, I went
to
>> www.ebay.com and searched the current scope offerings. There were over 75
>> available,
>> 95% would work for analog synth poking around.
>>
>> Here is a quick guide:
>>
>> 1) 50Mhz is all you need. 40 is OK, 20 is too slow, even for audio. Buy
Tek
>> if you can (Tektronics).
>> 2) Avoid the following:
>>
>> HP: the HP17xx scopes are easily the worse product line in the history of
>> HP. *trust me*
>> military: requires 4 people to lift it.
>> Dumont: tubes
>> Heathkit or Eico: crappy & more crappy
>>
>> 3) Good buys: Philips (vastly underrated scopes), B&K Precision (had one
for
>> 8 years)
>>
>> Note that 99% of these DO NOT come with probes. Meduim quality, 50Mhz
probes
>> are about $35 ea.
>> and you will need 2.
>>
>> 4) Best solution if you have LOTS of room: Tek 7000 series. In the
mid-80s
>> this was TEK's "flagship" line.
>> You get a 'mainframe' (power supply and CRT) with room for 'plug-ins'
>> (usually 4-wide). A dual-channel,
>> 150Mhz delayed-sweep 7000 was $12,500 in 1984. Today, you can get the
>> *exact* same configuration for $400!!
>>
>> What's the catch??? Well, they are *BIG*. About the size of 1 drawer in a
>> filing cabinet. In other words, they
>> are *DEEP*. I mean like 28 inches deep. But, if you have the space
>> (depth-wise) these puppies rock the scope world.
>>
>> I use a TEK TAS250 (2 ch, 50Mhz, no delayed sweep) for all MOTM
check-out.
>> This is a smaller, lightweight portable
>> scope. I bought a "demo" unit off the web from a liquidator for $400. It
was
>> *brand new in the box*! This was a $1300 new
>> scope. I also have a TEK TDS380 2Ghz , 450Mhz sampling scope. I won't say
>> how much THAT cost: let's say that
>> *replacement* probes are $395 each!!!
>>
>> I you find something, and want me to go look at it, send me the URL of
the
>> page (ebay has a cute feature that does this).
>>
>> Paul Schreiber
>>
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