Re: hobby electronics

On 07/07/2024 00:01, Edward Rawde wrote:

"Martin Brown" <'''newspam'''@nonad.co.uk> wrote in message news:v635o1$24goj$1@dont-email.me...

On 02/07/2024 17:28, john larkin wrote:

>

Some of these guys blame surface mount, which seems wrong to me. There
are lots of thru-hole parts and parts kits around.

>
Surface mount has rendered modern kit all but impossible for the home user to repair. I cut my teeth mending transistor car radios
back when chassis earth was chosen randomly by each car manufacturer to be either positive or negative and people blew up their
brand new car radios.
>
The other big earner was mending teenage wannabe rock stars amplifiers that had their output transistors fried or a pint of beer
in them.

 Anyone remember SN76013N/023N.
Horrible things, particularly when it must be your fault that the replacements (two for stereo) blew up again a few days after
repair.

ISTR a remarkable number of 741s or 709s inside them and the odd SE540 in the better ones. 2955/3055 output pairs - before power FETs took over.
--
Martin Brown