In message <[email protected]>, Adrian D. Ives
<[email protected]> writes
Hi Adrian,
I have a Grundy NewBrain PSU, that is labelled as - 6.5v at 1.2A - with
the other information rubbed over with a black marker of some sort.
It is enclosed in a brown thermoset plastic ( a longer rectangular shape
that the original Sinclair PSU ) and has two proper metal heating
distribution fins.
I have used it with my QL machines for many years, with no problems - it
a lot quieter and cooler in operation than an original Sinclair version.
It has the 3-pin connector to fit the QL machine.
So, this will be the "converted" version for the QL.
Which you also appear to have, too.
Try Maplins, for example, for the correct connector that you are
seeking.
Good luck with the "NewBrain" ... I hope your "old brain" is up to the
task ... :-)
I recently acquired a Grundy NewBrain PSU with the intention to use it
with a NewBrain Model A that I had recently purchased second hand. As
soon as the unit arrived I knew that I recognized it from somewhere,
yet I have never had any previous exposure to the NewBrain (this new
interest only came about after watching Micro Men). Anyway, I was
astonished to find that the computer-side lead terminated in a QL
power connector. Needless to say this will not fit the 6 pin BERG
connector on the NewBrain and, anyway, three pins can't carry three
power lines and a ground return.
I did some research on the internet and discovered that it's possible
to use a NewBrain PSU to power the QL by connecting directly to the
transformer secondary for the AC source and shorting out the
temperature trip to allow the unit's 6.5V DC output to overrun enough
to run the QL's 9V input (QL needs 1.8A, the NewBrain PSU is rated to
1.2A). I have to say this seems like a rather dubious arrangement to
me, but, anyway, my real question is this:
I'm sure I have a vague memory of using a PSU just like this to run a
QL in the distant past. Were these ever converted and sold
commercially as alternative QL PSUs? I'm just interested.
And I don't suppose anyone could recommend a source for the 6 pin BERG
connector (two rows of 3, keyway centre top, opposite side to guide)
so that I can put this PSU back to its original state?
Regards,
Adrian
_______________________________________________
QL-Users Mailing List
http://www.q-v-d.demon.co.uk/smsqe.htm
--
Malcolm Cadman
_______________________________________________
QL-Users Mailing List
http://www.q-v-d.demon.co.uk/smsqe.htm
