Re: Heathkit IO-30 Manual
pa5tig
the io-30 seems te replace the io-12
maybe you can try that manual at this site below.
http://www.nostalgickitscentral.com/heath/products/test.html
"Michael Breeman" <Michael.Bre...@radiobanter.com> schreef in
bericht news:Michael.Bre...@radiobanter.com...
>
> Require a complete service/construction manual for a Heathkit IO-30
> Oscilloscope. Also interested in a 5BP1 crt for this instrument, must be
> in VGC and both will be required to be posted to Australia.
>
>
>
>
> --
> Michael Breeman
pa5tig
Scott Dorsey
1. Most of the Heathkit scopes are very similar inside and a manual for one
will apply to most of them.
2. The power transformer has failed. The HV winding is bad.
3. If the power transformer has not failed, it will fail soon.
4. Replacement CRTs are very common, because so many of these scopes are
thrown away when the power transformer fails.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."
coffelt2
"Scott Dorsey" <klu...@panix.com> wrote in message
news:iebccj$ids$1...@panix2.panix.com...
>
> 2. The power transformer has failed. The HV winding is bad.
>
> 3. If the power transformer has not failed, it will fail soon.
>
exact
replacement was available (what a surprise!), I was faced with hanging two
or
three transformers externally. . . . .or rewind. Bit the bullet and
patiently unwrapped
and rewound the failed one. Five windings with three different size wire.
Miserable job,
but it did finally fit in it's case and except for a little hummummmumm,
seems to work
Ok.
W7LTQ
Scott Dorsey
The Heathkit ones usually lose the HV winding which is teeny tiny wire and
a real pain to work with, BUT the good news is that it's the outside winding
so you only have to unwrap that instead of all the whole thing. I suspect
the worst quality magnet wire available today is better than the stuff
Heathkit used by a long shot.
Jeevun Vethanayagam
Some schematics which may or may not be helpful. Includes power supply schematic for IO-30.