Voltage Regulator update?

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Kermit
ROM Dongle
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Joined: Sat Sep 09, 2017 7:12 am

Voltage Regulator update?

Postby Kermit » Sun Sep 24, 2017 5:01 pm

Can I change the voltage regulator for a Traco one like the Spectrum?
I have seen old adverts in QL world for a switching device in 1988 that I guess is the Traco? Called a Q-Power in QL World.
If I can, is it the same part as the Spectrum one?


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tofro
QL Wafer Drive
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Re: Voltage Regulator update?

Postby tofro » Sun Sep 24, 2017 5:09 pm

There are quite a few 7805 replacement voltage regulators in the market, Traco is one of them.

In case it's a drop-in replacement for a 7805, and matches the current rating, it should generally be usable.

I use one of those

https://www.digikey.com/product-detail/ ... ND/3438675

and am happy.

In my experience, though, the 7805 in the QL box is not so heavily stressed as the one on a SuperQBoard.

Tobias


Kermit
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Re: Voltage Regulator update?

Postby Kermit » Sun Sep 24, 2017 5:54 pm

OK Thanks, I have ordered some.
From what I remember seeing, isn't it just a case of unplugging one and replugging in the replacement?


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tofro
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Re: Voltage Regulator update?

Postby tofro » Sun Sep 24, 2017 5:57 pm

Right. You might need to remove the heatsink, depending on the exact size of your replacement.

Also, regard the pinout, and make very sure you replace the 7805 only, not the 7905...

Tobias


Kermit
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Re: Voltage Regulator update?

Postby Kermit » Sun Sep 24, 2017 6:45 pm

Got it. Pin out is OK. I've done it for species and zx81.
And I will only do the one bolted onto the heatsink and labelled 7805.
Cheers


RWAP
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Re: Voltage Regulator update?

Postby RWAP » Sun Sep 24, 2017 7:22 pm

It is funny that this question was raised and within minutes Tetroid had listed his own voltage regulator replacement on sellmyretro - https://www.sellmyretro.com/offer/details/28469

I wonder how that compares.


martyn_hill
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Re: Voltage Regulator update?

Postby martyn_hill » Sun Sep 24, 2017 7:45 pm

...Someone please stop me - I seem to to be buying everything QL advertised on SMR these last few days...

I am beginning to understand what possesses my wife in her 'shopping frenzy' moods...

:-)


Dave
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Re: Voltage Regulator update?

Postby Dave » Mon Sep 25, 2017 6:50 pm

Well, that's annoying as we did one that is/was about to launch in the next couple of weeks. :D

Hmmm. *grins*



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