verni QUASAR restoration

[vernimark]

OMG! The transformer has gone!!
Yes, the transformer seems to be short circuited...     

and one small part of the fan is damaged too... I'll post a request on the marketplace. and here a picture of the damaged part

[PaulSwan]

I *really* wouldn't bother fixing the fan. It's almost always audibly. magnetically and electrically noisy by now after 30 years and there are many much improved replacement options - e.g. ADDA AA1282DB-AT 220V-240V 50Hz/60Hz low noise, low power ball fan.




Paul.

[vernimark]

Hi paul, I d like to have a vorking fan only for completeness.  I usually don't plug it.
actually the transformer has gone and this is the most important issue i have now...

[PaulSwan]

OK, well, if you can't get the fan part local I kept all the fans I swapped out so you can have a part off one of those.

Yeah, that power brick looks very burnt The transformers are usually very reliable so there is likely a fault in the cab somewhere or it was damaged. There was a guy on UKVAC who parted out a KT-3 based Moon Crest cab and had parts from that - silverfox0786 was his alias.

Paul.

[vernimark]

Hi Paul, if you have one spare I ll appreciate it. I couldn't find one here in italy...
tomorrow i want to try to remove the ac filter. That could be the reason of the short... I hope.

that's a pity because the cab is quite in good general conditions and in case of working transformer this resto can be closed in one week

[PaulSwan]

OK, I'll fetch the old fans back next weekend and PM you when it's in hand.
Paul.

[vernimark]

Great!  


fast update:
I'm proceeding with the resto. I'm setting up the lights, both not working (marquee and black light)
Here I found a black light replacement:

http://www.ebay.it/itm/171437076855?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

I'm using a power brick from VANGUARD to test all electrical parts but this transformer doesn't support the voltages used by the KT-3 monitor so I've to find a replacement somewhere to close this project.

this week I want to close all aesthetic issues, as t-molding and small scratches.

I've a problem related to the control panel. It is full of cigarettes burns.
Burns are not really a problem , but the plexi is deformed. I'm thinking to put it in my oven making pressure with something put on but I dunno which temperature. I do not want to melt the plastic nor the color

[PaulSwan]

Silverfox not have the brick from his?

[vernimark]

He sold all parts to a guy that actually didn t need it but he can t remember the name

[PaulSwan]

It would have been through UKVAC or JAMMA+ so it'd be worth putting out a WTD on those forums. Mention it's from Quasar, Moon Crest & Scramble - someone may have parted one out.

Another possibility is to unwind it (counting the turns) and rewind it with new wire if you have a line/primary side short. It should be a single run with mid-taps (that you don't care about). A short in the secondary's is likely too complicated to rewind yourself.

Paul.

 

[vernimark]

actually I already removed the wire on primary, but I can't disassemble the blades and it's very difficult to remake the primary with them all around.
I counted the coils and I could see that the ratio is 1:1.8 so 396 coils for 220vac.


PS is it correct to say "coils" or I have to use "loops"? 

[PaulSwan]

The tabs you can epoxy back in place after the rewind. You've gone far enough along so you might as well rewind it You can use a low voltage AC supply to verify your ratios before going full 220V with it. You should be able to get the same gauge of coated wire from a components supply place.

Paul.

[lesoleil70]

I am in awe of the detail you are going to with this Quasar.  Excellent work. Many would have just found another power supply, I include myself in this.  Restoring every last piece is fantastic.

[vernimark]

thank you. every time I restore an old cab I learn something new; I try to preserve as many original parts as possible, anyway to buy a new power supply is not so bad

[Laszo]

actually I already removed the wire on primary, but I can't disassemble the blades and it's very difficult to remake the primary with them all around.
I counted the coils and I could see that the ratio is 1:1.8 so 396 coils for 220vac.


PS is it correct to say "coils" or I have to use "loops"?  

You transformer has a core, taps, insulation, windings which have turns....... Just trying to be a smart ass