21 Sep
1999
21 Sep
'99
3 p.m.
<There is a metal can on the back of the chassis that has a bit of rust on
<the outside, but peeking inside it looks like it is on the the transformer
Rust is not a factor unless loose bits of it are in the circuts.
<fortunately. As for the kind of cheapie it is, I have no idea... it's a
<rebadged Heathkit sold as a "Bell & Howell Schooles Oscilloscope model
<10D-4540".
I'll bet it's a cheapie recurrent sweep design. if so the H sweep should
have a switch that is marked internal/external... you want internal. There
should be a sweep rate switch as well.
lack of vertical deflection is either input set wrong, wrong gain setting
or possible a input selector switch set for grounded(to zero the input).
Heath would be a source for a manual in good likelyhood.
Allison
22 Sep
22 Sep
1:48 a.m.
Upon the date 11:00 PM 9/21/99 -0400, Allison J Parent said something like:
<There is a metal can on the back of the chassis
that has a bit of rust on
<the outside, but peeking inside it looks like it is on the the transformer
Rust is not a factor unless loose bits of it are in the circuts.
<fortunately. As for the kind of cheapie it is, I have no idea... it's a
<rebadged Heathkit sold as a "Bell & Howell Schooles Oscilloscope model
<10D-4540".
I'll bet it's a cheapie recurrent sweep design. if so the H sweep should
have a switch that is marked internal/external... you want internal. There
should be a sweep rate switch as well.
lack of vertical deflection is either input set wrong, wrong gain setting
or possible a input selector switch set for grounded(to zero the input).
Heath would be a source for a manual in good likelyhood.
Sure would be a good source. But also you can subscribe to one of the
several Heath-related lists out there and get help and a manual from some
of us there (I don't have any Heath scope mans myself). I subscibe to one
which has been a good resource of info for me. Here's the tag lines the
Heath Listserver attaches to each msg (a la the ones ClassicCmp has in the
header most of us see):
Sponsored by the City of Tempe
Listserver Submissions: heath(a)listserv.tempe.gov
Listserver Subscription: listserv(a)listserv.tempe.gov - "subscribe heath
'name' 'call'"
Listserver Unsubscribe: listserv(a)listserv.tempe.gov -
-"signoff heath"
Allison's and Tony's last messages are zeroing-in on what my thinking is as
to your problem(s). Listen to them.
Good luck with it.
Regards, Chris
-- --
Christian Fandt, Electronic/Electrical Historian
Jamestown, NY USA cfandt(a)netsync.net
Member of Antique Wireless Association
URL: http://www.antiquewireless.org/
4:35 a.m.
Upon the date 11:00 PM 9/21/99 -0400, Allison J Parent
said something like:
><There is a metal can on the back of the chassis that has a bit of rust on
><the outside, but peeking inside it looks like it is on the the transformer
Seriously I think this discussion has found its own orbit. This is supposed
to be a demo of the sound the old synth makes, not how an old scope
works/doesn't work. The best that can be really hoped for with the scope is
a brief 5 inch green squiggle. Any of the decent sound software packages
running on a computer with sound input will show a full screen "capture" of
the waveform, plus at least two or three meaningfull analysis windows. I
don't see how you could demonstrate anything without the capture ability
only the more expensive old scopes had.
9224
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9225
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allisonp＠world.std.com -
cfandt＠netsync.net -
mikeford＠socal.rr.com