You're right on the money, Tony. If I find something at much lower than market
price, I assume it needs help of some sort.
The Laser printers I bought over the past month were bought because they had
enough toner in the cartridges to warrant the price. The rest is gravy.
If I want a fixer-upper, a HamFest is a perfect place. If I want a "hobby
'scope" it's not likely I want to fix it. I want to use it. If I want a
second
one, I may feel differently, but for the first one, especially for someone who
has no other test gear, I'd say a $50 '465 might not be the good deal it would
be for someone already set up to repair test gear. First of all, one has to
know how the stuff works, and, secondly, one has to be of a mind to fix the
thing.
I've had my 'scope apart at times, but not because I LIKE fixing problems in my
tools.
Dick
----- Original Message -----
From: "Tony Duell" <ard(a)p850ug1.demon.co.uk>
To: <classiccmp(a)classiccmp.org>
Sent: Monday, August 27, 2001 2:21 PM
Subject: Re: Tek 465 as a hobby scope?
> Since this was a HamFest, I'd say you may not
have lost as much as you may
> think. (This is my opinion, based on my limited and very disappointing
> experience with HamFests, which I no longer patronize, so ... consider at
your
This is the exact opposite of my experience at radio rallies (which is
what we call hamfests over here). I have never been disapointed with
anything I've bought at a radio rally.
I have a couple of rules I follow at such events :
Never buy anything if it might be worth a lot less than you paid for
it. For example, I never buy chips at hamfests no matter how attractive
the price looks because if they are defective I know I can't repair them
so I've lost my money. But I would buy an old HP instrument for \pounds
10.00 (even though it's almost certainly faulty at that price) because I
can see at least \pounds 10.00 worth of knobs, case parts, connectors,
etc. The insides are going to be worth something as well. And most likely
the repair is going to be simple (this is how I ended up with an old, but
good, HP counter with plug-ins covering DC to 3GHz for very little money [1])
Even with the above rule, never buy anything unless you can afford to
lose the money. It's unlikely you will, but...
[1] All it needed was new smoothing capacitors in the PSU...
[...]
If someone at a HamFest wanted only $50 for a
'465, it's likely there were
problems not apparent to the casual onlooker. These would probably be quite
fixable, but most folks don't want a "fixer-upper," they want an
instrument
I regard all things I buy at rallies as 'fixer-uppers'. I expect it. I've
never much money for a single item at a rally, so I don't expect them to
work (often though I am pleasantly suprised by what I get -- faults are
often quite simple).
To be honest, I'd rather have a 'fixer-upper' that was once a first-class
instrument (like a Tek 'scope) than a more recent hobbyist-grade unit
bought new and working. I'll spend a few days/weeks/months fixing it up
(time spent on hobbies is free, after all ;-)) and in the end I'll have
something that I could never have afforded any other way. And it'll be
pleasant to use, unlike some more recent stuff.
In general, the more obscure an item, the more likely it is to be working
if sold cheaply at a rally.
A good 'scope will not be priced that cheaply in general because just
about everyone at a rally knows what a 'scope is, and wants one. And they
know the good makes (like Tek and HP). So a cheap Tek 'scope is likely to
need work
But something like an in-circuit emulator, or a programmer for some odd
chip family, or an obscure classic computer could well be very cheap,
even when working. Because almost nobody wants this sort of stuff (unless
they're into old computers, I guess :-)) I've picked up a Z80 ICE unit, a
logic analyser designed to connect to common 8 bit processors (6800, Z80,
6502 and 6809 IIRC), a PIC 17C4x programmer board (complete with a couple
of chips and all the manuals), and a Xerox D-machine for \pounds 10 or
less each. All apart from the D-machine were in perfect working order,
the last was missing the keyboard, but at that price...
-tony