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Post by redduke on Aug 18, 2022 9:20:06 GMT -7
Hi All, Quick question and I hope I'm not repeating a previous thread.
Problem: Fuse has blown on my Z Wreck Jr. No idea why but it was fine yesterday.
Written on the fuse itself is 'F1A/250VP' the preceding 'F' presumably means 'FAST'. On the Doc's amp itself is written '1A 250V - FAST'. I'm in France and I have found fuses labelled '1A 250V'. Now I'm no techy in the slightest. I saw the good Dr said on another thread that if the fuse is 'SLO BLO' then SLO BLO must be used. Mine says FAST. Can I use these 1A 250V fuses I have found or do I indeed need to find a FAST fuse? And does the 'P' after 250V written on the fuse itself have to be taken into account also?
Thanks in advance guys and gals....
Red
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Post by redduke on Aug 18, 2022 11:49:43 GMT -7
Looks like I have got it sorted... I have found 1A 250V "fusion rapide" fuses dimensions 0.6mm x 30mm. Unless somebody tells me otherwise I think they are the boys for the job. In comparison my Therapy has 1.5A Slo Blo. I thought I'd update the post just in case somebody in France gets a blown fuse on a Z WReck Jr (combo)....you never know
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Post by redduke on Aug 18, 2022 12:25:06 GMT -7
I also noticed than in the Z manual the fuse specified for the Jr is a Slo Blo but mine is definitely labelled FAST. So i presume it's 'Slo Blo' for the amp head but 'FAST' for the combo?
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Post by iluvpunz on Aug 19, 2022 6:46:32 GMT -7
You need the slo blo fuses for either the head or combo. Fast curve fuses may survive the inrush current during turn on and capacitor charging but on consistently. The slo blow fail curve is longer and is made to withstand longer current draws.
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Post by redduke on Aug 19, 2022 7:49:32 GMT -7
You need the slo blo fuses for either the head or combo. Fast curve fuses may survive the inrush current during turn on and capacitor charging but on consistently. The slo blow fail curve is longer and is made to withstand longer current draws. Hi ilunpunz.... Thanks for your reply but I'm a little confused still. I bought the combo new from an authorised Dr Z dealer and the fuse that is in it is stamped F 1A/250VP - which I take to be a fast fuse. Printed on the amp itself by the fuse is the following (I would load up a photo but wasn't successful in doing that!) : Fuse 1 AMP 250V FAST
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Post by iluvpunz on Aug 19, 2022 8:20:46 GMT -7
This is directly out of the Z Wreck Jr. manual.
11. Fuse: The fuse protects the amp from electrical faults. Replace only with the same rating and type stated below fuse holder (1A 250v SLO BLO). If the amp repeatedly blows the fuse contact your dealer or Dr. Z Amps.
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Post by redduke on Aug 19, 2022 8:24:48 GMT -7
This is directly out of the Z Wreck Jr. manual. 11. Fuse: The fuse protects the amp from electrical faults. Replace only with the same rating and type stated below fuse holder (1A 250v SLO BLO). If the amp repeatedly blows the fuse contact your dealer or Dr. Z Amps. And therein lies my issue. "......with the same rating and type stated below fuse holder.......". The type stated below the fuse holder is " FAST" and not SLO BLO
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Post by headshrinker (Marc) on Aug 19, 2022 8:28:41 GMT -7
I'm wondering if the difference has to do with the fact that one of you is in France and I'm pretty sure has 220 coming out of the wall and the other is in the USA with 110 coming out. Email repairs and they will give you the correct info, rather than everyone speculating.
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Post by redduke on Aug 19, 2022 8:46:37 GMT -7
Hi Marc......
Yep....I think you may have hit the nail there. I have sent an email earlier to Z so await their reply. The amp is used in France and bought in Holland where we use between 220 and 230 in Europe and the UK.
Once I get a reply I will post it here.
Thanks once again all........
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Post by borgen on Aug 19, 2022 14:34:52 GMT -7
I'm located in Sweden, and also had a problem with blowing fuses on my Z Wreck Jr. I contacted the support asking why the European adjusted amp had a fast blow fuse instead of a slow blow, this is the answer I got:
"It is to protect the amp from a pretty wildly varying line voltages in the EU/Eurasian markets that can be anywhere from 220-240+. That swing is much more drastic than in North America, which is usually anywhere from 115-127. Plus, higher voltages, different current draws. However, it should be noted that the fast blow being used in some of the EU market amps is sort of a holdover from the says when we were spec'ing all of our transformers at 230v. All of our EU amps are now 240v spec'ed. I think that's what happened, it's just a hold over from the 230v days, and I have talked to Dr. Z about this as we had one other EU customer that had this problem, and the slow blow solved the issue."
In the end I switched to a fast blow fuse with the same amp and voltage value, and I haven't had a problem since.
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