[Boatanchors] Inexpensive Scope Probes

[J. Forster]

If you mean 53x, 54x, 55x, 56x, etc by "TEK tube" they almost cannot be
given away.

-John

==================


> My main scope was a R7904 until the PS crapped out and its on the floor
> until I can get to it or just pick up another mainframe for $50 or less. I
> only paid $150 for it with 4 plug-ins about 4-5 years ago at a local
> surplus
> dealer. I havent gone beyond a 200MHz probe set yet but its still good for
> seeing signals way beyond that at a relative level which is all thats
> needed
> for stage alignment most of the time.
>
> Good SS analog scopes are everywhere these days, its often the TEK tube
> ones
> that are bringing big bux.
>
> Carl
> KM1H
>
>
>
> ----- Original Message -----
> From: "MICHAEL TALLENT" <mwtallent at comcast.net>
> To: "BOATANCHORS" <boatanchors at mailman.qth.net>
> Sent: Wednesday, February 09, 2011 1:47 PM
> Subject: Re: [Boatanchors] Inexpensive Scope Probes
>
>
>>I have 2 Tektronix 475 scopes for over 20 years and they work just fine,
>>200
>> MHz bandwidth.  The model 475A has 250 MHz bandwidth.  The 465 is the
>> little
>> brother to the 475 but the bandwidth is only 100 MHz and the sensitivity
>> is
>> only 5 mv/div instead of the 2 mv/div with the 475, otherwise they are
>> very
>> similar.  The lowest sensitivity is 50 V/div and with a 10X probe it
>> would
>> be 500 V/div but you should make sure you do not exceed the probe
>> voltage
>> rating.  Tektronix sold a lot of the 465-475 series of scopes.  My main
>> scope is a 7904 with 4 plug-ins with one going to 500 MHz and I use a
>> 900
>> MHz FET probe with it.
>>
>> Mike W6MXV  in KY
>>
>> ----- Original Message -----
>> From: "Ian Wilson" <ianmwilson73 at gmail.com>
>> To: "BOATANCHORS" <boatanchors at mailman.qth.net>
>> Sent: Wednesday, February 09, 2011 1:22 PM
>> Subject: Re: [Boatanchors] Inexpensive Scope Probes
>>
>>
>>>A scope is indispensable for any kind of RF work in my humble opinion,
>>> provided that you use common sense and don't look for high frequency
>>> detail with a medium frequency scope.
>>>
>>> You can align receivers, check oscillators, verify transmitter stages,
>>> and uncountably many other useful things, with even a modest scope.
>>>
>>> Unfortunately my BK 35MHz scope is dying. Can someone recommend
>>> a 200MHz scope for general use? Budget is very limited. Scope should be
>>> able to handle tube-type voltages with no strain.
>>>
>>> 73, ian K3IMW
>>
>>
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