TV noise caused by Miracle Expanderam

Nagging hardware related question? Post here!
Post Reply
RWAP
RWAP Master
Posts: 2834
Joined: Sun Nov 28, 2010 4:51 pm
Location: Stone, United Kingdom
Contact:

TV noise caused by Miracle Expanderam

Post by RWAP »

Louis, on the sellmyretro.com site has been doing some work on QL hardware.

He has a second hand Miracle Expanderam, which lacks the case, and when connected to his QLs, he found that there was a lot of interference on the TV picture.

To overcome this, he has added a lot of M1 ceramic capacitors to the Miracle board on the solder side. One capacitor to each RAM and one to 74HC245.

This has improved the picture greatly.


User avatar
Mr_Navigator
QL Fanatic
Posts: 782
Joined: Mon Dec 13, 2010 11:17 pm
Location: UK, Essex
Contact:

Re: TV noise caused by Miracle Expanderam

Post by Mr_Navigator »

Do you know if this cure was overcoming product design flaw or old age capacitors losing their value?


-----------------------------------------------------------------------------------
QLick here for the Back 2 the QL Blog http://backtotheql.blogspot.co.uk/
Post Reply